Merge branch 'dev-widget' into release-1.4

Conflicts:
	calculatorpp/AndroidManifest.xml

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorButtonActions.java

@@ -0,0 +1,13 @@
+package org.solovyev.android.calculator;
+
+/**
+ * User: Solovyev_S
+ * Date: 19.10.12
+ * Time: 17:31
+ */
+public final class CalculatorButtonActions {
+
+    private CalculatorButtonActions() {
+        throw new AssertionError();
+    }
+}

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorDisplayViewState.java

@@ -5,12 +5,14 @@ import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.solovyev.android.calculator.jscl.JsclOperation;
 
+import java.io.Serializable;
+
 /**
  * User: serso
  * Date: 9/20/12
  * Time: 9:50 PM
  */
-public interface CalculatorDisplayViewState {
+public interface CalculatorDisplayViewState extends Serializable {
 
     @NotNull
     String getText();

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorDisplayViewStateImpl.java

@@ -13,11 +13,19 @@ import org.solovyev.common.text.StringUtils;
  */
 public class CalculatorDisplayViewStateImpl implements CalculatorDisplayViewState {
 
+    /*
+    **********************************************************************
+    *
+    *                           FIELDS
+    *
+    **********************************************************************
+    */
+
     @NotNull
     private JsclOperation operation = JsclOperation.numeric;
 
     @Nullable
-    private Generic result;
+    private transient Generic result;
 
     @Nullable
     private String stringResult = "";
@@ -29,6 +37,14 @@ public class CalculatorDisplayViewStateImpl implements CalculatorDisplayViewStat
 
     private int selection = 0;
 
+    /*
+    **********************************************************************
+    *
+    *                           CONSTRUCTORS
+    *
+    **********************************************************************
+    */
+
     private CalculatorDisplayViewStateImpl() {
     }
 
@@ -62,6 +78,14 @@ public class CalculatorDisplayViewStateImpl implements CalculatorDisplayViewStat
         return calculatorDisplayState;
     }
 
+    /*
+    **********************************************************************
+    *
+    *                           METHODS
+    *
+    **********************************************************************
+    */
+
     @NotNull
     @Override
     public String getText() {

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorEditorImpl.java

@@ -1,309 +1,311 @@
-package org.solovyev.android.calculator;
+package org.solovyev.android.calculator;
-
+
-import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
+import org.jetbrains.annotations.Nullable;
-import org.solovyev.android.calculator.history.CalculatorHistoryState;
+import org.solovyev.android.calculator.history.CalculatorHistoryState;
-import org.solovyev.android.calculator.history.EditorHistoryState;
+import org.solovyev.android.calculator.history.EditorHistoryState;
-import org.solovyev.common.gui.CursorControl;
+import org.solovyev.common.gui.CursorControl;
-import org.solovyev.common.text.StringUtils;
+import org.solovyev.common.text.StringUtils;
-
+
-/**
+/**
- * User: Solovyev_S
+ * User: Solovyev_S
- * Date: 21.09.12
+ * Date: 21.09.12
- * Time: 11:53
+ * Time: 11:53
- */
+ */
-public class CalculatorEditorImpl implements CalculatorEditor {
+public class CalculatorEditorImpl implements CalculatorEditor {
-
+
-    @Nullable
+    @Nullable
-    private CalculatorEditorView view;
+    private CalculatorEditorView view;
-
+
-    @NotNull
+    @NotNull
-    private final Object viewLock = new Object();
+    private final Object viewLock = new Object();
-
+
-    @NotNull
+    @NotNull
-    private CalculatorEditorViewState lastViewState = CalculatorEditorViewStateImpl.newDefaultInstance();
+    private CalculatorEditorViewState lastViewState = CalculatorEditorViewStateImpl.newDefaultInstance();
-
+
-    @NotNull
+    @NotNull
-    private final Calculator calculator;
+    private final Calculator calculator;
-
+
-    @NotNull
+    @NotNull
-    private final CalculatorEventHolder lastEventHolder;
+    private final CalculatorEventHolder lastEventHolder;
-
+
-    @NotNull
+    @NotNull
-    private final CursorControlAdapter cursorControlAdapter = new CursorControlAdapter(this);
+    private final CursorControlAdapter cursorControlAdapter = new CursorControlAdapter(this);
-
+
-    public CalculatorEditorImpl(@NotNull Calculator calculator) {
+    public CalculatorEditorImpl(@NotNull Calculator calculator) {
-        this.calculator = calculator;
+        this.calculator = calculator;
-        this.calculator.addCalculatorEventListener(this);
+        this.calculator.addCalculatorEventListener(this);
-        this.lastEventHolder = new CalculatorEventHolder(CalculatorUtils.createFirstEventDataId());
+        this.lastEventHolder = new CalculatorEventHolder(CalculatorUtils.createFirstEventDataId());
-    }
+    }
-
+
-    @Override
+    @Override
-    public void setView(@Nullable CalculatorEditorView view) {
+    public void setView(@Nullable CalculatorEditorView view) {
-        synchronized (viewLock) {
+        synchronized (viewLock) {
-            this.view = view;
+            this.view = view;
-
+
-            if ( view != null ) {
+            if ( view != null ) {
-                view.setState(lastViewState);
+                view.setState(lastViewState);
-            }
+            }
-        }
+        }
-    }
+    }
-
+
-    @NotNull
+    @NotNull
-    @Override
+    @Override
-    public CalculatorEditorViewState getViewState() {
+    public CalculatorEditorViewState getViewState() {
-        return lastViewState;
+        return lastViewState;
-    }
+    }
-
+
-    @Override
+    @Override
-    public void updateViewState() {
+    public void updateViewState() {
-        setViewState(this.lastViewState, false);
+        setViewState(this.lastViewState, false);
-    }
+    }
-
+
-    @Override
+    @Override
-    public void setViewState(@NotNull CalculatorEditorViewState newViewState) {
+    public void setViewState(@NotNull CalculatorEditorViewState newViewState) {
-        setViewState(newViewState, true);
+        setViewState(newViewState, true);
-    }
+    }
-
+
-    private void setViewState(@NotNull CalculatorEditorViewState newViewState, boolean fireEvent) {
+    private void setViewState(@NotNull CalculatorEditorViewState newViewState, boolean majorChanges) {
-        synchronized (viewLock) {
+        synchronized (viewLock) {
-            final CalculatorEditorViewState oldViewState = this.lastViewState;
+            final CalculatorEditorViewState oldViewState = this.lastViewState;
-
+
-            this.lastViewState = newViewState;
+            this.lastViewState = newViewState;
-            if (this.view != null) {
+            if (this.view != null) {
-                this.view.setState(newViewState);
+                this.view.setState(newViewState);
-            }
+            }
-
+
-            if (fireEvent) {
+            if (majorChanges) {
-                calculator.fireCalculatorEvent(CalculatorEventType.editor_state_changed, new CalculatorEditorChangeEventDataImpl(oldViewState, newViewState));
+                calculator.fireCalculatorEvent(CalculatorEventType.editor_state_changed, new CalculatorEditorChangeEventDataImpl(oldViewState, newViewState));
-            }
+            } else {
-        }
+                calculator.fireCalculatorEvent(CalculatorEventType.editor_state_changed_light, new CalculatorEditorChangeEventDataImpl(oldViewState, newViewState));
-    }
+            }
-
+        }
-    @Override
+    }
-    public void onCalculatorEvent(@NotNull CalculatorEventData calculatorEventData,
+
-                                  @NotNull CalculatorEventType calculatorEventType,
+    @Override
-                                  @Nullable Object data) {
+    public void onCalculatorEvent(@NotNull CalculatorEventData calculatorEventData,
-        final CalculatorEventHolder.Result result = lastEventHolder.apply(calculatorEventData);
+                                  @NotNull CalculatorEventType calculatorEventType,
-
+                                  @Nullable Object data) {
-        if (result.isNewAfter()) {
+        final CalculatorEventHolder.Result result = lastEventHolder.apply(calculatorEventData);
-            switch (calculatorEventType) {
+
-                case use_history_state:
+        if (result.isNewAfter()) {
-                    final CalculatorHistoryState calculatorHistoryState = (CalculatorHistoryState)data;
+            switch (calculatorEventType) {
-                    final EditorHistoryState editorState = calculatorHistoryState.getEditorState();
+                case use_history_state:
-                    this.setText(StringUtils.getNotEmpty(editorState.getText(), ""), editorState.getCursorPosition());
+                    final CalculatorHistoryState calculatorHistoryState = (CalculatorHistoryState)data;
-                    break;
+                    final EditorHistoryState editorState = calculatorHistoryState.getEditorState();
-            }
+                    this.setText(StringUtils.getNotEmpty(editorState.getText(), ""), editorState.getCursorPosition());
-        }
+                    break;
-    }
+            }
-
+        }
-    /*
+    }
-    **********************************************************************
+
-    *
+    /*
-    *                           SELECTION
+    **********************************************************************
-    *
+    *
-    **********************************************************************
+    *                           SELECTION
-    */
+    *
-
+    **********************************************************************
-    @NotNull
+    */
-    private CalculatorEditorViewState newSelectionViewState(int newSelection) {
+
-        if (this.lastViewState.getSelection() != newSelection) {
+    @NotNull
-            final CalculatorEditorViewState result = CalculatorEditorViewStateImpl.newSelection(this.lastViewState, newSelection);
+    private CalculatorEditorViewState newSelectionViewState(int newSelection) {
-            setViewState(result, false);
+        if (this.lastViewState.getSelection() != newSelection) {
-            return result;
+            final CalculatorEditorViewState result = CalculatorEditorViewStateImpl.newSelection(this.lastViewState, newSelection);
-        } else {
+            setViewState(result, false);
-            return this.lastViewState;
+            return result;
-        }
+        } else {
-    }
+            return this.lastViewState;
-
+        }
-    @NotNull
+    }
-    public CalculatorEditorViewState setCursorOnStart() {
+
-        synchronized (viewLock) {
+    @NotNull
-            return newSelectionViewState(0);
+    public CalculatorEditorViewState setCursorOnStart() {
-        }
+        synchronized (viewLock) {
-    }
+            return newSelectionViewState(0);
-
+        }
-
+    }
-    @NotNull
+
-    public CalculatorEditorViewState setCursorOnEnd() {
+
-        synchronized (viewLock) {
+    @NotNull
-            return newSelectionViewState(this.lastViewState.getText().length());
+    public CalculatorEditorViewState setCursorOnEnd() {
-        }
+        synchronized (viewLock) {
-    }
+            return newSelectionViewState(this.lastViewState.getText().length());
-
+        }
-    @NotNull
+    }
-    public CalculatorEditorViewState moveCursorLeft() {
+
-        synchronized (viewLock) {
+    @NotNull
-            if (this.lastViewState.getSelection() > 0) {
+    public CalculatorEditorViewState moveCursorLeft() {
-                return newSelectionViewState(this.lastViewState.getSelection() - 1);
+        synchronized (viewLock) {
-            } else {
+            if (this.lastViewState.getSelection() > 0) {
-                return this.lastViewState;
+                return newSelectionViewState(this.lastViewState.getSelection() - 1);
-            }
+            } else {
-        }
+                return this.lastViewState;
-    }
+            }
-
+        }
-    @NotNull
+    }
-    public CalculatorEditorViewState moveCursorRight() {
+
-        synchronized (viewLock) {
+    @NotNull
-            if (this.lastViewState.getSelection() < this.lastViewState.getText().length()) {
+    public CalculatorEditorViewState moveCursorRight() {
-                return newSelectionViewState(this.lastViewState.getSelection() + 1);
+        synchronized (viewLock) {
-            } else {
+            if (this.lastViewState.getSelection() < this.lastViewState.getText().length()) {
-                return this.lastViewState;
+                return newSelectionViewState(this.lastViewState.getSelection() + 1);
-            }
+            } else {
-        }
+                return this.lastViewState;
-    }
+            }
-
+        }
-    @NotNull
+    }
-    @Override
+
-    public CursorControl asCursorControl() {
+    @NotNull
-        return cursorControlAdapter;
+    @Override
-    }
+    public CursorControl asCursorControl() {
-
+        return cursorControlAdapter;
-    /*
+    }
-    **********************************************************************
+
-    *
+    /*
-    *                           EDITOR ACTIONS
+    **********************************************************************
-    *
+    *
-    **********************************************************************
+    *                           EDITOR ACTIONS
-    */
+    *
-
+    **********************************************************************
-    @NotNull
+    */
-    @Override
+
-    public CalculatorEditorViewState erase() {
+    @NotNull
-        synchronized (viewLock) {
+    @Override
-            int selection = this.lastViewState.getSelection();
+    public CalculatorEditorViewState erase() {
-            final String text = this.lastViewState.getText();
+        synchronized (viewLock) {
-            if (selection > 0 && text.length() > 0 && selection <= text.length()) {
+            int selection = this.lastViewState.getSelection();
-                final StringBuilder newText = new StringBuilder(text.length() - 1);
+            final String text = this.lastViewState.getText();
-                newText.append(text.substring(0, selection - 1)).append(text.substring(selection, text.length()));
+            if (selection > 0 && text.length() > 0 && selection <= text.length()) {
-
+                final StringBuilder newText = new StringBuilder(text.length() - 1);
-                final CalculatorEditorViewState result = CalculatorEditorViewStateImpl.newInstance(newText.toString(), selection - 1);
+                newText.append(text.substring(0, selection - 1)).append(text.substring(selection, text.length()));
-                setViewState(result);
+
-                return result;
+                final CalculatorEditorViewState result = CalculatorEditorViewStateImpl.newInstance(newText.toString(), selection - 1);
-            } else {
+                setViewState(result);
-                return this.lastViewState;
+                return result;
-            }
+            } else {
-        }
+                return this.lastViewState;
-    }
+            }
-
+        }
-    @NotNull
+    }
-    @Override
+
-    public CalculatorEditorViewState clear() {
+    @NotNull
-        synchronized (viewLock) {
+    @Override
-            return setText("");
+    public CalculatorEditorViewState clear() {
-        }
+        synchronized (viewLock) {
-    }
+            return setText("");
-
+        }
-    @NotNull
+    }
-    @Override
+
-    public CalculatorEditorViewState setText(@NotNull String text) {
+    @NotNull
-        synchronized (viewLock) {
+    @Override
-            final CalculatorEditorViewState result = CalculatorEditorViewStateImpl.newInstance(text, text.length());
+    public CalculatorEditorViewState setText(@NotNull String text) {
-            setViewState(result);
+        synchronized (viewLock) {
-            return result;
+            final CalculatorEditorViewState result = CalculatorEditorViewStateImpl.newInstance(text, text.length());
-        }
+            setViewState(result);
-    }
+            return result;
-
+        }
-    @NotNull
+    }
-    @Override
+
-    public CalculatorEditorViewState setText(@NotNull String text, int selection) {
+    @NotNull
-        synchronized (viewLock) {
+    @Override
-            selection = correctSelection(selection, text);
+    public CalculatorEditorViewState setText(@NotNull String text, int selection) {
-
+        synchronized (viewLock) {
-            final CalculatorEditorViewState result = CalculatorEditorViewStateImpl.newInstance(text, selection);
+            selection = correctSelection(selection, text);
-            setViewState(result);
+
-            return result;
+            final CalculatorEditorViewState result = CalculatorEditorViewStateImpl.newInstance(text, selection);
-        }
+            setViewState(result);
-    }
+            return result;
-
+        }
-    @NotNull
+    }
-    @Override
+
-    public CalculatorEditorViewState insert(@NotNull String text) {
+    @NotNull
-        synchronized (viewLock) {
+    @Override
-            return insert(text, 0);
+    public CalculatorEditorViewState insert(@NotNull String text) {
-        }
+        synchronized (viewLock) {
-    }
+            return insert(text, 0);
-
+        }
-    @NotNull
+    }
-    @Override
+
-    public CalculatorEditorViewState insert(@NotNull String text, int selectionOffset) {
+    @NotNull
-        synchronized (viewLock) {
+    @Override
-            final int selection = this.lastViewState.getSelection();
+    public CalculatorEditorViewState insert(@NotNull String text, int selectionOffset) {
-            final String oldText = this.lastViewState.getText();
+        synchronized (viewLock) {
-
+            final int selection = this.lastViewState.getSelection();
-            int newTextLength = text.length() + oldText.length();
+            final String oldText = this.lastViewState.getText();
-            final StringBuilder newText = new StringBuilder(newTextLength);
+
-
+            int newTextLength = text.length() + oldText.length();
-            newText.append(oldText.substring(0, selection));
+            final StringBuilder newText = new StringBuilder(newTextLength);
-            newText.append(text);
+
-            newText.append(oldText.substring(selection));
+            newText.append(oldText.substring(0, selection));
-
+            newText.append(text);
-            int newSelection = correctSelection(text.length() + selection + selectionOffset, newTextLength);
+            newText.append(oldText.substring(selection));
-            final CalculatorEditorViewState result = CalculatorEditorViewStateImpl.newInstance(newText.toString(), newSelection);
+
-            setViewState(result);
+            int newSelection = correctSelection(text.length() + selection + selectionOffset, newTextLength);
-            return result;
+            final CalculatorEditorViewState result = CalculatorEditorViewStateImpl.newInstance(newText.toString(), newSelection);
-        }
+            setViewState(result);
-    }
+            return result;
-
+        }
-    @NotNull
+    }
-    @Override
+
-    public CalculatorEditorViewState moveSelection(int offset) {
+    @NotNull
-        synchronized (viewLock) {
+    @Override
-            int selection = this.lastViewState.getSelection() + offset;
+    public CalculatorEditorViewState moveSelection(int offset) {
-
+        synchronized (viewLock) {
-            return setSelection(selection);
+            int selection = this.lastViewState.getSelection() + offset;
-        }
+
-    }
+            return setSelection(selection);
-
+        }
-    @NotNull
+    }
-    @Override
+
-    public CalculatorEditorViewState setSelection(int selection) {
+    @NotNull
-        synchronized (viewLock) {
+    @Override
-            selection = correctSelection(selection, this.lastViewState.getText());
+    public CalculatorEditorViewState setSelection(int selection) {
-
+        synchronized (viewLock) {
-            final CalculatorEditorViewState result = CalculatorEditorViewStateImpl.newSelection(this.lastViewState, selection);
+            selection = correctSelection(selection, this.lastViewState.getText());
-            setViewState(result, false);
+
-            return result;
+            final CalculatorEditorViewState result = CalculatorEditorViewStateImpl.newSelection(this.lastViewState, selection);
-        }
+            setViewState(result, false);
-    }
+            return result;
-
+        }
-    private int correctSelection(int selection, @NotNull String text) {
+    }
-        return correctSelection(selection, text.length());
+
-    }
+    private int correctSelection(int selection, @NotNull String text) {
-
+        return correctSelection(selection, text.length());
-    private int correctSelection(int selection, int textLength) {
+    }
-        int result = Math.max(selection, 0);
+
-        result = Math.min(result, textLength);
+    private int correctSelection(int selection, int textLength) {
-        return result;
+        int result = Math.max(selection, 0);
-    }
+        result = Math.min(result, textLength);
-
+        return result;
-    private static final class CursorControlAdapter implements CursorControl {
+    }
-
+
-        @NotNull
+    private static final class CursorControlAdapter implements CursorControl {
-        private final CalculatorEditor calculatorEditor;
+
-
+        @NotNull
-        private CursorControlAdapter(@NotNull CalculatorEditor calculatorEditor) {
+        private final CalculatorEditor calculatorEditor;
-            this.calculatorEditor = calculatorEditor;
+
-        }
+        private CursorControlAdapter(@NotNull CalculatorEditor calculatorEditor) {
-
+            this.calculatorEditor = calculatorEditor;
-        @Override
+        }
-        public void setCursorOnStart() {
+
-            this.calculatorEditor.setCursorOnStart();
+        @Override
-        }
+        public void setCursorOnStart() {
-
+            this.calculatorEditor.setCursorOnStart();
-        @Override
+        }
-        public void setCursorOnEnd() {
+
-            this.calculatorEditor.setCursorOnEnd();
+        @Override
-        }
+        public void setCursorOnEnd() {
-
+            this.calculatorEditor.setCursorOnEnd();
-        @Override
+        }
-        public void moveCursorLeft() {
+
-            this.calculatorEditor.moveCursorLeft();
+        @Override
-        }
+        public void moveCursorLeft() {
-
+            this.calculatorEditor.moveCursorLeft();
-        @Override
+        }
-        public void moveCursorRight() {
+
-            this.calculatorEditor.moveCursorRight();
+        @Override
-        }
+        public void moveCursorRight() {
-    }
+            this.calculatorEditor.moveCursorRight();
-}
+        }
+    }
+}

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorEditorViewState.java

@@ -1,16 +1,18 @@
-package org.solovyev.android.calculator;
+package org.solovyev.android.calculator;
-
+
-import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.NotNull;
-
+
-/**
+import java.io.Serializable;
- * User: Solovyev_S
+
- * Date: 21.09.12
+/**
- * Time: 11:48
+ * User: Solovyev_S
- */
+ * Date: 21.09.12
-public interface CalculatorEditorViewState {
+ * Time: 11:48
-
+ */
-    @NotNull
+public interface CalculatorEditorViewState extends Serializable {
-    String getText();
+
-
+    @NotNull
-    int getSelection();
+    String getText();
-}
+
+    int getSelection();
+}

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorEventType.java

@@ -1,127 +1,154 @@
-package org.solovyev.android.calculator;
+package org.solovyev.android.calculator;
-
+
-import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.NotNull;
-
+
-/**
+/**
- * User: Solovyev_S
+ * User: Solovyev_S
- * Date: 20.09.12
+ * Date: 20.09.12
- * Time: 16:40
+ * Time: 16:40
- */
+ */
-public enum CalculatorEventType {
+public enum CalculatorEventType {
-
+
-    /*
+    /*
-    **********************************************************************
+    **********************************************************************
-    *
+    *
-    *                           CALCULATION
+    *                           CALCULATION
-    *                           org.solovyev.android.calculator.CalculatorEvaluationEventData
+    *                           org.solovyev.android.calculator.CalculatorEvaluationEventData
-    *
+    *
-    **********************************************************************
+    **********************************************************************
-    */
+    */
-
+
-
+
-    // @NotNull CalculatorEditorViewState
+    // @NotNull CalculatorEditorViewState
-    manual_calculation_requested,
+    manual_calculation_requested,
-
+
-    // @NotNull org.solovyev.android.calculator.CalculatorOutput
+    // @NotNull org.solovyev.android.calculator.CalculatorOutput
-    calculation_result,
+    calculation_result,
-
+
-    calculation_cancelled,
+    calculation_cancelled,
-
+
-    // @NotNull org.solovyev.android.calculator.CalculatorFailure
+    // @NotNull org.solovyev.android.calculator.CalculatorFailure
-    calculation_failed,
+    calculation_failed,
-
+
-    /*
+    /*
-    **********************************************************************
+    **********************************************************************
-    *
+    *
-    *                           CONVERSION
+    *                           CONVERSION
-    *                           CalculatorConversionEventData
+    *                           CalculatorConversionEventData
-    *
+    *
-    **********************************************************************
+    **********************************************************************
-    */
+    */
-    conversion_started,
+    conversion_started,
-
+
-    // @NotNull String conversion result
+    // @NotNull String conversion result
-    conversion_result,
+    conversion_result,
-
+
-    // @NotNull ConversionFailure
+    // @NotNull ConversionFailure
-    conversion_failed,
+    conversion_failed,
-
+
-    conversion_finished,
+    conversion_finished,
-
+
-    /*
+    /*
-    **********************************************************************
+    **********************************************************************
-    *
+    *
-    *                           EDITOR
+    *                           EDITOR
-    *
+    *
-    **********************************************************************
+    **********************************************************************
-    */
+    */
-
+
-    // @NotNull org.solovyev.android.calculator.CalculatorEditorChangeEventData
+    // @NotNull org.solovyev.android.calculator.CalculatorEditorChangeEventData
-    editor_state_changed,
+    editor_state_changed,
-
+    editor_state_changed_light,
-    // @NotNull CalculatorDisplayChangeEventData
+
-    display_state_changed,
+    // @NotNull CalculatorDisplayChangeEventData
-
+    display_state_changed,
-    /*
+
-    **********************************************************************
+    /*
-    *
+    **********************************************************************
-    *                           ENGINE
+    *
-    *
+    *                           ENGINE
-    **********************************************************************
+    *
-    */
+    **********************************************************************
-
+    */
-    engine_preferences_changed,
+
-
+    engine_preferences_changed,
-    /*
+
-    **********************************************************************
+    /*
-    *
+    **********************************************************************
-    *                           HISTORY
+    *
-    *
+    *                           HISTORY
-    **********************************************************************
+    *
-    */
+    **********************************************************************
-
+    */
-    // @NotNull CalculatorHistoryState
+
-   history_state_added,
+    // @NotNull CalculatorHistoryState
-
+   history_state_added,
-    // @NotNull CalculatorHistoryState
+
-   use_history_state,
+    // @NotNull CalculatorHistoryState
-
+   use_history_state,
-   clear_history_requested,
+
-
+   clear_history_requested,
-    /*
+
-    **********************************************************************
+    /*
-    *
+    **********************************************************************
-    *                           MATH ENTITIES
+    *
-    *
+    *                           MATH ENTITIES
-    **********************************************************************
+    *
-    */
+    **********************************************************************
-
+    */
-    // @NotNull IConstant
+
-    use_constant,
+    // @NotNull IConstant
-
+    use_constant,
-    // @NotNull Function
+
-    use_function,
+    // @NotNull Function
-
+    use_function,
-    // @NotNull Operator
+
-    use_operator,
+    // @NotNull Operator
-
+    use_operator,
-    // @NotNull IConstant
+
-    constant_added,
+    // @NotNull IConstant
-
+    constant_added,
-    // @NotNull Change<IConstant>
+
-    constant_changed,
+    // @NotNull Change<IConstant>
-
+    constant_changed,
-    // @NotNull IConstant
+
-    constant_removed;
+    // @NotNull IConstant
-
+    constant_removed,
-    public boolean isOfType(@NotNull CalculatorEventType... types) {
+
-        for (CalculatorEventType type : types) {
+    /*
-            if ( this == type ) {
+    **********************************************************************
-                return true;
+    *
-            }
+    *                           OTHER
-        }
+    *
-
+    **********************************************************************
-        return false;
+    */
-    }
+    show_history,
-
+    show_history_detached,
-}
+
+    show_functions,
+    show_functions_detached,
+
+    show_vars,
+    show_vars_detached,
+
+    open_app,
+
+    show_operators,
+    show_operators_detached,
+
+    show_settings,
+    show_settings_detached,
+
+    show_like_dialog;
+
+    public boolean isOfType(@NotNull CalculatorEventType... types) {
+        for (CalculatorEventType type : types) {
+            if ( this == type ) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+}

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorImpl.java

@@ -409,17 +409,17 @@ public class CalculatorImpl implements Calculator, CalculatorEventListener {
 
             case use_constant:
                 final IConstant constant = (IConstant)data;
-                CalculatorLocatorImpl.getInstance().getKeyboard().digitButtonPressed(constant.getName());
+                CalculatorLocatorImpl.getInstance().getKeyboard().buttonPressed(constant.getName());
                 break;
 
             case use_operator:
                 final Operator operator = (Operator)data;
-                CalculatorLocatorImpl.getInstance().getKeyboard().digitButtonPressed(operator.getName());
+                CalculatorLocatorImpl.getInstance().getKeyboard().buttonPressed(operator.getName());
                 break;
 
             case use_function:
                 final Function function = (Function)data;
-                CalculatorLocatorImpl.getInstance().getKeyboard().digitButtonPressed(function.getName());
+                CalculatorLocatorImpl.getInstance().getKeyboard().buttonPressed(function.getName());
                 break;
 
         }

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorKeyboard.java

@@ -1,25 +1,25 @@
-package org.solovyev.android.calculator;
+package org.solovyev.android.calculator;
-
+
-import org.jetbrains.annotations.Nullable;
+import org.jetbrains.annotations.Nullable;
-
+
-/**
+/**
- * User: serso
+ * User: serso
- * Date: 9/22/12
+ * Date: 9/22/12
- * Time: 1:08 PM
+ * Time: 1:08 PM
- */
+ */
-public interface CalculatorKeyboard {
+public interface CalculatorKeyboard {
-
+
-    void digitButtonPressed(@Nullable String text);
+    void buttonPressed(@Nullable String text);
-
+
-    void roundBracketsButtonPressed();
+    void roundBracketsButtonPressed();
-
+
-    void pasteButtonPressed();
+    void pasteButtonPressed();
-
+
-    void clearButtonPressed();
+    void clearButtonPressed();
-
+
-    void copyButtonPressed();
+    void copyButtonPressed();
-
+
-    void moveCursorLeft();
+    void moveCursorLeft();
-
+
-    void moveCursorRight();
+    void moveCursorRight();
-}
+}

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorKeyboardImpl.java

@@ -20,40 +20,57 @@ public class CalculatorKeyboardImpl implements CalculatorKeyboard {
     }
 
     @Override
-    public void digitButtonPressed(@Nullable final String text) {
+    public void buttonPressed(@Nullable final String text) {
 
         if (!StringUtils.isEmpty(text)) {
             assert text != null;
 
-            int cursorPositionOffset = 0;
+            // process special buttons
-            final StringBuilder textToBeInserted = new StringBuilder(text);
+            boolean processed = processSpecialButtons(text);
 
-            final MathType.Result mathType = MathType.getType(text, 0, false);
+            if (!processed) {
-            switch (mathType.getMathType()) {
+                int cursorPositionOffset = 0;
-                case function:
+                final StringBuilder textToBeInserted = new StringBuilder(text);
-                    textToBeInserted.append("()");
-                    cursorPositionOffset = -1;
-                    break;
-                case operator:
-                    textToBeInserted.append("()");
-                    cursorPositionOffset = -1;
-                    break;
-                case comma:
-                    textToBeInserted.append(" ");
-                    break;
-            }
 
-            if (cursorPositionOffset == 0) {
+                final MathType.Result mathType = MathType.getType(text, 0, false);
-                if (MathType.openGroupSymbols.contains(text)) {
+                switch (mathType.getMathType()) {
-                    cursorPositionOffset = -1;
+                    case function:
+                        textToBeInserted.append("()");
+                        cursorPositionOffset = -1;
+                        break;
+                    case operator:
+                        textToBeInserted.append("()");
+                        cursorPositionOffset = -1;
+                        break;
+                    case comma:
+                        textToBeInserted.append(" ");
+                        break;
                 }
-            }
 
-            final CalculatorEditor editor = CalculatorLocatorImpl.getInstance().getEditor();
+                if (cursorPositionOffset == 0) {
-            editor.insert(textToBeInserted.toString(), cursorPositionOffset);
+                    if (MathType.openGroupSymbols.contains(text)) {
+                        cursorPositionOffset = -1;
+                    }
+                }
+
+                final CalculatorEditor editor = CalculatorLocatorImpl.getInstance().getEditor();
+                editor.insert(textToBeInserted.toString(), cursorPositionOffset);
+            }
         }
     }
 
+    private boolean processSpecialButtons(@NotNull String text) {
+        boolean result = false;
+
+        final CalculatorSpecialButton button = CalculatorSpecialButton.getByActionCode(text);
+        if ( button != null ) {
+            button.onClick(this);
+            result = true;
+        }
+
+        return result;
+    }
+
     @Override
     public void roundBracketsButtonPressed() {
         final CalculatorEditor editor = CalculatorLocatorImpl.getInstance().getEditor();

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorNotifier.java

@@ -19,4 +19,6 @@ public interface CalculatorNotifier {
     void showMessage(@NotNull Integer messageCode, @NotNull MessageType messageType, @NotNull List<Object> parameters);
 
     void showMessage(@NotNull Integer messageCode, @NotNull MessageType messageType, @Nullable Object... parameters);
+
+    void showDebugMessage(@Nullable  String tag, @NotNull String message);
 }

calculatorpp-core/src/main/java/org/solovyev/android/calculator/CalculatorSpecialButton.java

@@ -0,0 +1,155 @@
+package org.solovyev.android.calculator;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * User: serso
+ * Date: 10/20/12
+ * Time: 2:05 PM
+ */
+public enum CalculatorSpecialButton {
+
+    history("history") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            CalculatorLocatorImpl.getInstance().getCalculator().fireCalculatorEvent(CalculatorEventType.show_history, null);
+        }
+    },
+    history_detached("history_detached") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            CalculatorLocatorImpl.getInstance().getCalculator().fireCalculatorEvent(CalculatorEventType.show_history_detached, null);
+        }
+    },
+    cursor_right("▶") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            keyboard.moveCursorRight();
+        }
+    },
+    cursor_left("◀") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            keyboard.moveCursorLeft();
+        }
+    },
+    settings("settings") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            CalculatorLocatorImpl.getInstance().getCalculator().fireCalculatorEvent(CalculatorEventType.show_settings, null);
+        }
+    },
+
+    settings_detached("settings_detached") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            CalculatorLocatorImpl.getInstance().getCalculator().fireCalculatorEvent(CalculatorEventType.show_settings_detached, null);
+        }
+    },
+
+    like("like") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            CalculatorLocatorImpl.getInstance().getCalculator().fireCalculatorEvent(CalculatorEventType.show_like_dialog, null);
+        }
+    },
+    erase("erase") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            CalculatorLocatorImpl.getInstance().getEditor().erase();
+        }
+    },
+    paste("paste") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            keyboard.pasteButtonPressed();
+        }
+    },
+    copy("copy") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            keyboard.copyButtonPressed();
+        }
+    },
+    equals("=") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            CalculatorLocatorImpl.getInstance().getCalculator().evaluate();
+        }
+    },
+    clear("clear") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            keyboard.clearButtonPressed();
+        }
+    },
+    functions("functions") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            CalculatorLocatorImpl.getInstance().getCalculator().fireCalculatorEvent(CalculatorEventType.show_functions, null);
+        }
+    },
+    functions_detached("functions_detached") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            CalculatorLocatorImpl.getInstance().getCalculator().fireCalculatorEvent(CalculatorEventType.show_functions_detached, null);
+        }
+    },
+    open_app("open_app") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            CalculatorLocatorImpl.getInstance().getCalculator().fireCalculatorEvent(CalculatorEventType.open_app, null);
+        }
+    },
+    vars("vars") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            CalculatorLocatorImpl.getInstance().getCalculator().fireCalculatorEvent(CalculatorEventType.show_vars, null);
+        }
+    },
+    vars_detached("vars_detached") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            CalculatorLocatorImpl.getInstance().getCalculator().fireCalculatorEvent(CalculatorEventType.show_vars_detached, null);
+        }
+    },
+    operators("operators") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            CalculatorLocatorImpl.getInstance().getCalculator().fireCalculatorEvent(CalculatorEventType.show_operators, null);
+        }
+    },
+
+    operators_detached("operators_detached") {
+        @Override
+        public void onClick(@NotNull CalculatorKeyboard keyboard) {
+            CalculatorLocatorImpl.getInstance().getCalculator().fireCalculatorEvent(CalculatorEventType.show_operators_detached, null);
+        }
+    };
+
+    @NotNull
+    private final String actionCode;
+
+    CalculatorSpecialButton(@NotNull String actionCode) {
+        this.actionCode = actionCode;
+    }
+
+    @NotNull
+    public String getActionCode() {
+        return actionCode;
+    }
+
+    @Nullable
+    public static CalculatorSpecialButton getByActionCode(@NotNull String actionCode) {
+        for (CalculatorSpecialButton button : values()) {
+            if (button.getActionCode().equals(actionCode)) {
+                return button;
+            }
+        }
+
+        return null;
+    }
+
+    public abstract void onClick(@NotNull CalculatorKeyboard keyboard);
+}

calculatorpp-core/src/main/java/org/solovyev/android/calculator/DummyCalculatorNotifier.java

@@ -25,4 +25,8 @@ public class DummyCalculatorNotifier implements CalculatorNotifier {
     @Override
     public void showMessage(@NotNull Integer messageCode, @NotNull MessageType messageType, @Nullable Object... parameters) {
     }
+
+    @Override
+    public void showDebugMessage(@Nullable String tag, @NotNull String message) {
+    }
 }

calculatorpp-core/src/main/java/org/solovyev/android/calculator/ListCalculatorEventContainer.java

@@ -42,6 +42,7 @@ public class ListCalculatorEventContainer implements CalculatorEventContainer {
         final CalculatorLogger logger = CalculatorLocatorImpl.getInstance().getLogger();
 
         for (CalculatorEvent e : calculatorEvents) {
+            CalculatorLocatorImpl.getInstance().getLogger().debug(TAG, "Event fired: " + e.getCalculatorEventType());
             for (CalculatorEventListener listener : listeners) {
                 /*long startTime = System.currentTimeMillis();*/
                 listener.onCalculatorEvent(e.getCalculatorEventData(), e.getCalculatorEventType(), e.getData());

calculatorpp-core/src/test/java/org/solovyev/android/calculator/CalculatorDisplayViewStateImplTest.java

@@ -0,0 +1,23 @@
+package org.solovyev.android.calculator;
+
+import jscl.math.Expression;
+import org.junit.Test;
+import org.solovyev.android.calculator.jscl.JsclOperation;
+
+/**
+ * User: serso
+ * Date: 10/20/12
+ * Time: 12:24 PM
+ */
+public class CalculatorDisplayViewStateImplTest {
+
+    @Test
+    public void testSerializable() throws Exception {
+        CalculatorTestUtils.testSerialization(CalculatorDisplayViewStateImpl.newValidState(JsclOperation.numeric, null, "test", 3));
+        CalculatorTestUtils.testSerialization(CalculatorDisplayViewStateImpl.newValidState(JsclOperation.numeric, Expression.valueOf("3"), "test", 3));
+        CalculatorTestUtils.testSerialization(CalculatorDisplayViewStateImpl.newValidState(JsclOperation.simplify, Expression.valueOf("3+3"), "test", 3));
+        CalculatorTestUtils.testSerialization(CalculatorDisplayViewStateImpl.newDefaultInstance());
+        CalculatorTestUtils.testSerialization(CalculatorDisplayViewStateImpl.newErrorState(JsclOperation.numeric, "ertert"));
+    }
+
+}

calculatorpp-core/src/test/java/org/solovyev/android/calculator/CalculatorEditorViewStateImplTest.java

@@ -0,0 +1,21 @@
+package org.solovyev.android.calculator;
+
+import junit.framework.Assert;
+import org.junit.Test;
+
+/**
+ * User: serso
+ * Date: 10/20/12
+ * Time: 12:31 PM
+ */
+public class CalculatorEditorViewStateImplTest {
+
+    @Test
+    public void testSerialization() throws Exception {
+        CalculatorTestUtils.testSerialization(CalculatorEditorViewStateImpl.newDefaultInstance());
+
+        CalculatorEditorViewState out = CalculatorTestUtils.testSerialization(CalculatorEditorViewStateImpl.newInstance("treter", 2));
+        Assert.assertEquals(2, out.getSelection());
+        Assert.assertEquals("treter", out.getText());
+    }
+}

calculatorpp-core/src/test/java/org/solovyev/android/calculator/CalculatorTestUtils.java

@@ -8,6 +8,7 @@ import org.mockito.Mockito;
 import org.solovyev.android.calculator.history.CalculatorHistory;
 import org.solovyev.android.calculator.jscl.JsclOperation;
 
+import java.io.*;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 
@@ -41,7 +42,7 @@ public class CalculatorTestUtils {
     }
 
     public static void assertEval(@NotNull String expected, @NotNull String expression) {
-       assertEval(expected, expression, JsclOperation.numeric);
+        assertEval(expected, expression, JsclOperation.numeric);
     }
 
     public static void assertEval(@NotNull String expected, @NotNull String expression, @NotNull JsclOperation operation) {
@@ -57,8 +58,8 @@ public class CalculatorTestUtils {
             calculatorEventListener.setCalculatorEventData(calculator.evaluate(operation, expression));
 
             if (latch.await(TIMEOUT, TimeUnit.SECONDS)) {
-               Assert.assertNotNull(calculatorEventListener.getResult());
+                Assert.assertNotNull(calculatorEventListener.getResult());
-               Assert.assertEquals(expected, calculatorEventListener.getResult().getText());
+                Assert.assertEquals(expected, calculatorEventListener.getResult().getText());
             } else {
                 Assert.fail("Too long wait for: " + expression);
             }
@@ -74,7 +75,33 @@ public class CalculatorTestUtils {
         assertError(expression, JsclOperation.numeric);
     }
 
-    private static final class TestCalculatorEventListener implements  CalculatorEventListener {
+    public static <S extends Serializable> S testSerialization(@NotNull S serializable) throws IOException, ClassNotFoundException {
+        final ByteArrayOutputStream out = new ByteArrayOutputStream();
+
+        ObjectOutputStream oos = null;
+        try {
+            oos = new ObjectOutputStream(out);
+            oos.writeObject(serializable);
+        } finally {
+            if (oos != null) {
+                oos.close();
+            }
+        }
+
+        byte[] serialized = out.toByteArray();
+
+        Assert.assertTrue(serialized.length > 0);
+
+
+        final ObjectInputStream resultStream = new ObjectInputStream(new ByteArrayInputStream(out.toByteArray()));
+        final S result = (S) resultStream.readObject();
+
+        Assert.assertNotNull(result);
+
+        return result;
+    }
+
+    private static final class TestCalculatorEventListener implements CalculatorEventListener {
 
         @Nullable
         private CalculatorEventData calculatorEventData;
@@ -95,7 +122,7 @@ public class CalculatorTestUtils {
 
         @Override
         public void onCalculatorEvent(@NotNull CalculatorEventData calculatorEventData, @NotNull CalculatorEventType calculatorEventType, @Nullable Object data) {
-            if ( this.calculatorEventData != null && calculatorEventData.isSameSequence(this.calculatorEventData) ) {
+            if (this.calculatorEventData != null && calculatorEventData.isSameSequence(this.calculatorEventData)) {
                 if (calculatorEventType == CalculatorEventType.display_state_changed) {
                     final CalculatorDisplayChangeEventData displayChange = (CalculatorDisplayChangeEventData) data;
 

calculatorpp/AndroidManifest.xml

@@ -1,57 +1,80 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:installLocation="auto" android:versionCode="102" android:versionName="1.4.3" package="org.solovyev.android.calculator">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" android:installLocation="auto" android:versionCode="102" android:versionName="1.4.3" package="org.solovyev.android.calculator">
-
+
-    <uses-permission android:name="android.permission.VIBRATE"/>
+    <uses-permission android:name="android.permission.VIBRATE"/>
-    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.INTERNET"/>
-    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
-    <uses-permission android:name="com.android.vending.BILLING"/>
+    <uses-permission android:name="com.android.vending.BILLING"/>
-
+
-
+
-    <uses-sdk android:minSdkVersion="4" android:targetSdkVersion="8"/>
+    <uses-sdk android:minSdkVersion="4" android:targetSdkVersion="8"/>
-
+
-    <application android:debuggable="false" android:hardwareAccelerated="false" android:icon="@drawable/icon" android:label="@string/c_app_name" android:name=".CalculatorApplication" android:theme="@style/metro_blue_theme">
+    <application android:debuggable="false" android:hardwareAccelerated="false" android:icon="@drawable/icon" android:label="@string/c_app_name" android:name=".CalculatorApplication" android:theme="@style/metro_blue_theme">
-
+
-        <activity android:label="@string/c_app_name" android:name=".CalculatorActivity" android:windowSoftInputMode="adjustPan">
+        <activity android:label="@string/c_app_name" android:name=".CalculatorActivity" android:windowSoftInputMode="adjustPan" android:clearTaskOnLaunch="true">
-
+
-            <intent-filter>
+            <intent-filter>
-                <action android:name="android.intent.action.MAIN"/>
+                <action android:name="android.intent.action.MAIN"/>
-                <category android:name="android.intent.category.LAUNCHER"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
-            </intent-filter>
+            </intent-filter>
-
+
-        </activity>
+        </activity>
-
+
-        <!-- settings must use action bar icon-->
+        <!-- settings must use action bar icon-->
-        <activity android:icon="@drawable/icon_action_bar" android:label="@string/c_app_settings" android:name=".CalculatorPreferencesActivity"/>
+        <activity android:icon="@drawable/icon_action_bar" android:label="@string/c_app_settings" android:name=".CalculatorPreferencesActivity"/>
-
+
-        <activity android:label="@string/c_history" android:name=".history.CalculatorHistoryActivity"/>
+        <activity android:label="@string/c_history" android:name=".history.CalculatorHistoryActivity"/>
-
+
-        <activity android:label="@string/c_about" android:name=".about.CalculatorAboutActivity"/>
+        <activity android:label="@string/c_about" android:name=".about.CalculatorAboutActivity"/>
-
+
-        <activity android:label="@string/c_help" android:name=".help.CalculatorHelpActivity"/>
+        <activity android:label="@string/c_help" android:name=".help.CalculatorHelpActivity"/>
-
+
-        <activity android:label="@string/c_functions" android:name=".math.edit.CalculatorFunctionsActivity"/>
+        <activity android:label="@string/c_functions" android:name=".math.edit.CalculatorFunctionsActivity"/>
-
+
-        <activity android:label="@string/c_operators" android:name=".math.edit.CalculatorOperatorsActivity"/>
+        <activity android:label="@string/c_operators" android:name=".math.edit.CalculatorOperatorsActivity"/>
-
+
-        <activity android:label="@string/c_vars_and_constants" android:name=".math.edit.CalculatorVarsActivity"/>
+        <activity android:label="@string/c_vars_and_constants" android:name=".math.edit.CalculatorVarsActivity"/>
-
+
-        <activity android:label="@string/c_plot_graph" android:name=".plot.CalculatorPlotActivity"/>
+        <activity android:label="@string/c_plot_graph" android:name=".plot.CalculatorPlotActivity"/>
-
+
-        <!-- settings must use action bar icon-->
+        <activity android:name=".widget.CalculatorWidgetConfigurationActivity"  android:theme="@style/metro_blue_theme">
-        <activity android:icon="@drawable/icon_action_bar" android:label="@string/c_settings" android:name=".plot.CalculatorPlotPreferenceActivity"/>
+            <intent-filter>
-
+                <action android:name="android.appwidget.action.APPWIDGET_CONFIGURE"/>
-        <activity android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" android:name="com.google.ads.AdActivity"/>
+            </intent-filter>
-
+        </activity>
-        <service android:name="net.robotmedia.billing.BillingService"/>
+
-        <receiver android:name="net.robotmedia.billing.BillingReceiver">
+        <!-- settings must use action bar icon-->
-            <intent-filter>
+        <activity android:icon="@drawable/icon_action_bar" android:label="@string/c_settings" android:name=".plot.CalculatorPlotPreferenceActivity"/>
-                <action android:name="com.android.vending.billing.IN_APP_NOTIFY"/>
+
-                <action android:name="com.android.vending.billing.RESPONSE_CODE"/>
+        <receiver
-                <action android:name="com.android.vending.billing.PURCHASE_STATE_CHANGED"/>
+                android:icon="@drawable/icon"
-            </intent-filter>
+                android:label="@string/c_app_name"
-        </receiver>
+                android:name=".widget.CalculatorWidgetProvider">
-
+
-        <activity android:excludeFromRecents="true" android:finishOnTaskLaunch="true" android:launchMode="singleInstance" android:name="org.acra.CrashReportDialog" android:theme="@style/Theme.Sherlock.Dialog"/>
+            <intent-filter>
-
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE"/>
-    </application>
+                <action android:name="org.solovyev.calculator.widget.EDITOR_STATE_CHANGED"/>
+                <action android:name="org.solovyev.calculator.widget.DISPLAY_STATE_CHANGED"/>
+                <action android:name="org.solovyev.calculator.widget.BUTTON_PRESSED"/>
+            </intent-filter>
+
+            <meta-data
+                    android:name="android.appwidget.provider"
+                    android:resource="@xml/calculator_widget_info"/>
+        </receiver>
+
+        <activity android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize" android:name="com.google.ads.AdActivity"/>
+
+        <service android:name="net.robotmedia.billing.BillingService"/>
+        <receiver android:name="net.robotmedia.billing.BillingReceiver">
+            <intent-filter>
+                <action android:name="com.android.vending.billing.IN_APP_NOTIFY"/>
+                <action android:name="com.android.vending.billing.RESPONSE_CODE"/>
+                <action android:name="com.android.vending.billing.PURCHASE_STATE_CHANGED"/>
+            </intent-filter>
+        </receiver>
+
+        <activity android:excludeFromRecents="true" android:finishOnTaskLaunch="true" android:launchMode="singleInstance" android:name="org.acra.CrashReportDialog" android:theme="@style/Theme.Sherlock.Dialog"/>
+
+    </application>
 </manifest>

calculatorpp/project.properties

@@ -1,24 +1,24 @@
-# This file is automatically generated by Android Tools.
+# This file is automatically generated by Android Tools.
-# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
+# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
-#
+#
-# This file must be checked in Version Control Systems.
+# This file must be checked in Version Control Systems.
-#
+#
-# To customize properties used by the Ant build system use,
+# To customize properties used by the Ant build system use,
-# "ant.properties", and override values to adapt the script to your
+# "ant.properties", and override values to adapt the script to your
-# project structure.
+# project structure.
-
+
-# Project target.
+# Project target.
-target=android-15
+target=android-15
-android.library.reference.1=gen-external-apklibs/org.solovyev.android_android-common-core_1.0.0
+android.library.reference.1=gen-external-apklibs/org.solovyev.android_android-common-core_1.0.0
-android.library.reference.2=gen-external-apklibs/org.solovyev.android_android-common-ads_1.0.0
+android.library.reference.2=gen-external-apklibs/org.solovyev.android_android-common-ads_1.0.0
-android.library.reference.3=gen-external-apklibs/org.solovyev.android_billing_0.2
+android.library.reference.3=gen-external-apklibs/org.solovyev.android_billing_0.2
-android.library.reference.4=gen-external-apklibs/org.solovyev.android_android-common-db_1.0.0
+android.library.reference.4=gen-external-apklibs/org.solovyev.android_android-common-db_1.0.0
-android.library.reference.5=gen-external-apklibs/org.solovyev.android_android-common-view_1.0.0
+android.library.reference.5=gen-external-apklibs/org.solovyev.android_android-common-view_1.0.0
-android.library.reference.6=gen-external-apklibs/org.solovyev.android_android-common-preferences_1.0.0
+android.library.reference.6=gen-external-apklibs/org.solovyev.android_android-common-preferences_1.0.0
-android.library.reference.7=gen-external-apklibs/org.solovyev.android_android-common-other_1.0.0
+android.library.reference.7=gen-external-apklibs/org.solovyev.android_android-common-other_1.0.0
-android.library.reference.8=gen-external-apklibs/org.solovyev.android_android-common-menu_1.0.0
+android.library.reference.8=gen-external-apklibs/org.solovyev.android_android-common-menu_1.0.0
-android.library.reference.9=gen-external-apklibs/org.solovyev.android_android-common-sherlock_1.0.0
+android.library.reference.9=gen-external-apklibs/org.solovyev.android_android-common-sherlock_1.0.0
-android.library.reference.10=gen-external-apklibs/com.actionbarsherlock_library_4.1.0
+android.library.reference.10=gen-external-apklibs/com.actionbarsherlock_library_4.1.0
-android.library.reference.11=gen-external-apklibs/org.solovyev.android_android-common-list_1.0.0
+android.library.reference.11=gen-external-apklibs/org.solovyev.android_android-common-list_1.0.0
-
+
-
+

calculatorpp/res/layout/calc_copy_button.xml

@@ -1,14 +1,14 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
-
+
-<!--
+<!--
-  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
-  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ For more information, please, contact se.solovyev@gmail.com
-  ~ or visit http://se.solovyev.org
+  ~ or visit http://se.solovyev.org
-  -->
+  -->
-
+
-<org.solovyev.android.view.ColorButton xmlns:a="http://schemas.android.com/apk/res/android"
+<org.solovyev.android.view.ColorButton xmlns:a="http://schemas.android.com/apk/res/android"
-			 xmlns:c="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
+			 xmlns:c="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
-			 a:id="@+id/pasteButton"
+			 a:id="@+id/copyButton"
-			 a:drawableTop="@drawable/kb_copy"
+			 a:drawableTop="@drawable/kb_copy"
-			 style="?controlImageButtonStyle"
+			 style="?controlImageButtonStyle"
 			 a:onClick="copyButtonClickHandler"/>

calculatorpp/res/layout/calc_dot_button.xml

@@ -8,7 +8,7 @@
 
 <org.solovyev.android.view.drag.DirectionDragButton xmlns:a="http://schemas.android.com/apk/res/android"
 													   xmlns:c="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
-													   a:id="@+id/squareBracketsButton"
+													   a:id="@+id/periodButton"
 													   a:text="."
 													   c:textUp=","
 													   c:directionTextScale="0.5"

calculatorpp/res/layout/calc_left_button.xml

@@ -1,16 +1,16 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
-
+
-<!--
+<!--
-  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
-  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ For more information, please, contact se.solovyev@gmail.com
-  ~ or visit http://se.solovyev.org
+  ~ or visit http://se.solovyev.org
-  -->
+  -->
-
+
-<org.solovyev.android.view.drag.DirectionDragButton xmlns:a="http://schemas.android.com/apk/res/android"
+<org.solovyev.android.view.drag.DirectionDragButton xmlns:a="http://schemas.android.com/apk/res/android"
-													   xmlns:c="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
+													   xmlns:c="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
-													   a:id="@+id/leftButton"
+													   a:id="@+id/leftButton"
-													   c:textUp="◀◀"
+													   c:textUp="◀◀"
-													   a:text="◀"
+													   a:text="◀"
-													   c:directionTextScale="0.5"
+													   c:directionTextScale="0.5"
-													   style="?controlButtonStyle"
+													   style="?controlButtonStyle"
-													   a:onClick="moveLeftButtonClickHandler"/>
+													   a:onClick="digitButtonClickHandler"/>

calculatorpp/res/layout/calc_right_button.xml

@@ -1,16 +1,16 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
-
+
-<!--
+<!--
-  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
-  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ For more information, please, contact se.solovyev@gmail.com
-  ~ or visit http://se.solovyev.org
+  ~ or visit http://se.solovyev.org
-  -->
+  -->
-
+
-<org.solovyev.android.view.drag.DirectionDragButton xmlns:a="http://schemas.android.com/apk/res/android"
+<org.solovyev.android.view.drag.DirectionDragButton xmlns:a="http://schemas.android.com/apk/res/android"
-													   xmlns:c="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
+													   xmlns:c="http://schemas.android.com/apk/res/org.solovyev.android.calculator"
-													   a:id="@+id/rightButton"
+													   a:id="@+id/rightButton"
-													   c:textUp="▶▶"
+													   c:textUp="▶▶"
-													   a:text="▶"
+													   a:text="▶"
-													   c:directionTextScale="0.5"
+													   c:directionTextScale="0.5"
-													   style="?controlButtonStyle"
+													   style="?controlButtonStyle"
-													   a:onClick="moveRightButtonClickHandler"/>
+													   a:onClick="digitButtonClickHandler"/>

calculatorpp/res/layout/widget_app_button.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<ImageButton xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/appButton"
+        a:src="@drawable/kb_logo"
+        style="@style/widget_metro_control_image_button_style"
+        a:contentDescription="App"/>

calculatorpp/res/layout/widget_clear_button.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/clearButton"
+        a:text="@string/c_clear"
+        a:textStyle="bold"
+        style="@style/widget_metro_control_button_style"/>

calculatorpp/res/layout/widget_copy_button.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<ImageButton xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/copyButton"
+        a:src="@drawable/kb_copy"
+        style="@style/widget_metro_control_image_button_style"
+        a:contentDescription="Copy"/>

calculatorpp/res/layout/widget_display.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<TextView
+        xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/calculatorDisplay"
+        style="@style/widget_display_style"
+        a:textIsSelectable="true"
+        a:padding="@dimen/display_padding"
+        a:singleLine="false"
+        a:scrollbars="vertical"/>

calculatorpp/res/layout/widget_division_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/divisionButton"
+        a:text="/"
+        style="@style/widget_metro_blue_operation_button_style"/>

calculatorpp/res/layout/widget_dot_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/periodButton"
+        a:text="."
+        style="@style/metro_digit_button_style"/>

calculatorpp/res/layout/widget_editor.xml

@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
+              a:id="@+id/main_fragment_layout"
+              style="@style/default_fragment_layout_style"
+              a:layout_width="match_parent"
+              a:layout_height="match_parent"
+              a:padding="@dimen/editor_padding">
+
+    <TextView
+            a:id="@+id/calculatorEditor"
+            style="@style/widget_editor_style"
+            a:textIsSelectable="true"
+            a:singleLine="false"
+            a:scrollbars="vertical"
+            a:hint="@string/c_calc_editor_hint"/>
+
+</LinearLayout>

calculatorpp/res/layout/widget_eight_digit_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/eightDigitButton"
+        a:text="8"
+        style="@style/widget_metro_digit_button_style"/>

calculatorpp/res/layout/widget_equals_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+<Button
+        xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/equalsButton"
+        a:text="="
+        style="@style/widget_metro_control_button_style"/>

calculatorpp/res/layout/widget_erase_button.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<ImageButton xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/eraseButton"
+        a:src="@drawable/kb_delete"
+        style="@style/widget_metro_control_image_button_style"
+        a:contentDescription="Erase"/>

calculatorpp/res/layout/widget_five_digit_button.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/fiveDigitButton"
+        a:text="5"
+        style="@style/widget_metro_digit_button_style"/>

calculatorpp/res/layout/widget_four_digit_button.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/fourDigitButton"
+        a:text="4"
+        style="@style/widget_metro_digit_button_style"/>

calculatorpp/res/layout/widget_functions_button.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/functionsButton"
+        a:text="ƒ(x)"
+        a:textStyle="italic"
+        style="@style/widget_metro_control_button_style"/>

calculatorpp/res/layout/widget_history_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/historyButton"
+        a:text="@string/c_history_button"
+        style="@style/widget_metro_control_button_style"
+        a:textStyle="bold"/>

calculatorpp/res/layout/widget_keyboard.xml

@@ -0,0 +1,74 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
+              a:layout_width="match_parent"
+              a:layout_height="match_parent"
+              a:orientation="vertical">
+
+    <LinearLayout a:layout_weight="1"
+                  a:layout_width="match_parent"
+                  a:layout_height="0dp">
+
+        <include layout="@layout/widget_seven_digit_button"/>
+        <include layout="@layout/widget_eight_digit_button"/>
+        <include layout="@layout/widget_nine_digit_button"/>
+        <include layout="@layout/widget_multiplication_button"/>
+        <include layout="@layout/widget_percent_button"/>
+        <include layout="@layout/widget_clear_button"/>
+
+    </LinearLayout>
+
+    <LinearLayout a:layout_weight="1"
+                  a:layout_width="match_parent"
+                  a:layout_height="0dp">
+
+        <include layout="@layout/widget_four_digit_button"/>
+        <include layout="@layout/widget_five_digit_button"/>
+        <include layout="@layout/widget_six_digit_button"/>
+        <include layout="@layout/widget_division_button"/>
+        <include layout="@layout/widget_power_button"/>
+        <include layout="@layout/widget_erase_button"/>
+
+    </LinearLayout>
+
+    <LinearLayout a:layout_weight="1"
+                  a:layout_width="match_parent"
+                  a:layout_height="0dp">
+
+        <include layout="@layout/widget_one_digit_button"/>
+        <include layout="@layout/widget_two_digit_button"/>
+        <include layout="@layout/widget_three_digit_button"/>
+        <include layout="@layout/widget_plus_button"/>
+        <include layout="@layout/widget_like_button"/>
+        <include layout="@layout/widget_copy_button"/>
+
+    </LinearLayout>
+
+    <LinearLayout a:layout_weight="1"
+                  a:layout_width="match_parent"
+                  a:layout_height="0dp">
+
+        <include layout="@layout/widget_round_brackets_button"/>
+        <include layout="@layout/widget_zero_digit_button"/>
+        <include layout="@layout/widget_dot_button"/>
+        <include layout="@layout/widget_subtraction_button"/>
+        <include layout="@layout/widget_settings_button"/>
+        <include layout="@layout/widget_paste_button"/>
+
+    </LinearLayout>
+
+
+    <LinearLayout a:layout_weight="1"
+                  a:layout_width="match_parent"
+                  a:layout_height="0dp">
+
+        <include layout="@layout/widget_left_button"/>
+        <include layout="@layout/widget_right_button"/>
+        <include layout="@layout/widget_vars_button"/>
+        <include layout="@layout/widget_functions_button"/>
+        <include layout="@layout/widget_app_button"/>
+        <include layout="@layout/widget_history_button"/>
+
+    </LinearLayout>
+
+</LinearLayout>

calculatorpp/res/layout/widget_layout.xml

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
+              a:layout_width="match_parent"
+              a:layout_height="match_parent"
+              a:orientation="vertical"
+              style="@style/widget_main_layout_style">
+
+    <include layout="@layout/widget_editor"
+             a:layout_weight="2"
+             a:layout_width="match_parent"
+             a:layout_height="0dp"/>
+
+    <LinearLayout a:layout_weight="1"
+                  a:layout_width="match_parent"
+                  a:layout_height="0dp">
+
+        <include layout="@layout/widget_equals_button"
+                 a:layout_margin="@dimen/button_margin"
+                 a:layout_weight="1"
+                 a:layout_width="0dp"
+                 a:layout_height="match_parent"/>
+
+        <include layout="@layout/widget_display"
+                      a:layout_weight="5"
+                      a:layout_width="0dp"
+                      a:layout_height="wrap_content"/>
+
+    </LinearLayout>
+
+    <include layout="@layout/widget_keyboard"
+             a:layout_weight="5"
+             a:layout_width="match_parent"
+             a:layout_height="0dp"/>
+
+</LinearLayout>

calculatorpp/res/layout/widget_left_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/leftButton"
+        a:text="◀"
+        style="@style/widget_metro_control_button_style"/>

calculatorpp/res/layout/widget_like_button.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<ImageButton xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/likeButton"
+        a:src="@drawable/kb_facebook"
+        style="@style/widget_metro_control_image_button_style"
+        a:contentDescription="Like"/>

calculatorpp/res/layout/widget_multiplication_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/multiplicationButton"
+        a:text="×"
+        style="@style/widget_metro_blue_operation_button_style"/>

calculatorpp/res/layout/widget_nine_digit_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/nineDigitButton"
+        a:text="9"
+        style="@style/widget_metro_digit_button_style"/>

calculatorpp/res/layout/widget_one_digit_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/oneDigitButton"
+        a:text="1"
+        style="@style/widget_metro_digit_button_style"/>

calculatorpp/res/layout/widget_paste_button.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<ImageButton xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/pasteButton"
+        a:src="@drawable/kb_paste"
+        style="@style/widget_metro_control_image_button_style"
+        a:contentDescription="Paste"/>

calculatorpp/res/layout/widget_percent_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/percentButton"
+        a:text="%"
+        style="@style/widget_metro_blue_operation_button_style"/>

calculatorpp/res/layout/widget_plus_button.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/plusButton"
+        a:text="+"
+        style="@style/widget_metro_blue_operation_button_style"/>

calculatorpp/res/layout/widget_power_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/powerButton"
+        a:text="^"
+        style="@style/widget_metro_blue_operation_button_style"/>

calculatorpp/res/layout/widget_right_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/rightButton"
+        a:text="▶"
+        style="@style/widget_metro_control_button_style"/>

calculatorpp/res/layout/widget_round_brackets_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/roundBracketsButton"
+        a:text="()"
+        style="@style/widget_metro_digit_button_style"/>

calculatorpp/res/layout/widget_settings_button.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<ImageButton xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/settingsButton"
+        a:src="@drawable/kb_settings"
+        style="@style/widget_metro_control_image_button_style"
+        a:contentDescription="Settings"/>

calculatorpp/res/layout/widget_seven_digit_button.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/sevenDigitButton"
+        a:text="7"
+        style="@style/widget_metro_digit_button_style"/>

calculatorpp/res/layout/widget_six_digit_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/sixDigitButton"
+        a:text="6"
+        style="@style/widget_metro_digit_button_style"/>

calculatorpp/res/layout/widget_subtraction_button.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/subtractionButton"
+        a:text="-"
+        style="@style/widget_metro_blue_operation_button_style"/>

calculatorpp/res/layout/widget_three_digit_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/threeDigitButton"
+        a:text="3"
+        style="@style/widget_metro_digit_button_style"/>

calculatorpp/res/layout/widget_two_digit_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/twoDigitButton"
+        a:text="2"
+        style="@style/widget_metro_digit_button_style"/>

calculatorpp/res/layout/widget_vars_button.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/varsButton"
+        a:text="π,…"
+        a:textStyle="italic"
+        style="@style/widget_metro_control_button_style"/>

calculatorpp/res/layout/widget_zero_digit_button.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+  ~ For more information, please, contact se.solovyev@gmail.com
+  ~ or visit http://se.solovyev.org
+  -->
+
+<Button xmlns:a="http://schemas.android.com/apk/res/android"
+        a:id="@+id/zeroDigitButton"
+        a:text="0"
+        style="@style/widget_metro_digit_button_style"/>

calculatorpp/res/values/colors.xml

@@ -11,6 +11,7 @@
 	<color name="button_ce_text_color">#ffffffff</color>
 	<color name="default_text_color">#ffffffff</color>
 	<color name="display_error_text_color">#ff393939</color>
+	<color name="widget_cursor_color">#ff707070</color>
 	<color name="selected_angle_unit_text_color">#ffffff99</color>
 	<color name="default_background">#ff000000</color>
 	<color name="pane_background">#ff1f1f1f</color>

calculatorpp/res/values/dimens.xml

@@ -1,21 +1,25 @@
-<resources>
+<resources>
-    <dimen name="text_size">20sp</dimen>
+    <dimen name="text_size">20sp</dimen>
-    <dimen name="button_margin">0.5dp</dimen>
+    <dimen name="button_margin">0.5dp</dimen>
-    <dimen name="display_margin_land">2.5dp</dimen>
+    <dimen name="display_margin_land">2.5dp</dimen>
-
+
-    <dimen name="fragment_text_size">15sp</dimen>
+    <dimen name="fragment_text_size">15sp</dimen>
-    <dimen name="fragment_title_text_size">20sp</dimen>
+    <dimen name="fragment_title_text_size">20sp</dimen>
-
+
-    <dimen name="keyboard_button_text_size">30dp</dimen>
+    <dimen name="keyboard_button_text_size">30dp</dimen>
-    <dimen name="button_text_size">20dp</dimen>
+    <dimen name="button_text_size">20dp</dimen>
-    <dimen name="display_text_size">25sp</dimen>
+    <dimen name="display_text_size">25sp</dimen>
-    <dimen name="editor_text_size">25sp</dimen>
+    <dimen name="editor_text_size">25sp</dimen>
-    <dimen name="pane_margin">5dp</dimen>
+    <dimen name="pane_margin">5dp</dimen>
-    <dimen name="pane_padding">5dp</dimen>
+    <dimen name="pane_padding">5dp</dimen>
-    <dimen name="math_entity_text_size">20sp</dimen>
+    <dimen name="math_entity_text_size">20sp</dimen>
-    <dimen name="math_entity_description_text_size">15sp</dimen>
+    <dimen name="math_entity_description_text_size">15sp</dimen>
-
+
-    <!--only for not multipane-->
+    <dimen name="widget_editor_text_size">25sp</dimen>
-    <dimen name="editor_padding">5dp</dimen>
+    <dimen name="widget_keyboard_button_text_size">20dp</dimen>
-    <dimen name="display_padding">3dp</dimen>
+    <dimen name="widget_display_text_size">25sp</dimen>
+
+    <!--only for not multipane-->
+    <dimen name="editor_padding">5dp</dimen>
+    <dimen name="display_padding">3dp</dimen>
 </resources>

calculatorpp/res/values/styles.xml

@@ -58,6 +58,14 @@
         <item name="android:textSize">@dimen/display_text_size</item>
     </style>
 
+    <style name="widget_editor_style" parent="editor_style">
+        <item name="android:textSize">@dimen/widget_editor_text_size</item>
+    </style>
+
+    <style name="widget_display_style" parent="display_style">
+        <item name="android:textSize">@dimen/widget_display_text_size</item>
+    </style>
+
     <style name="about_style" parent="default_text">
         <item name="android:gravity">center</item>
         <item name="android:layout_width">fill_parent</item>

calculatorpp/res/values/theme_default.xml

@@ -80,6 +80,10 @@
         <item name="android:layout_width">match_parent</item>
     </style>
 
+    <style name="widget_main_layout_style" parent="default_main_layout_style">
+        <item name="android:padding">1dp</item>
+    </style>
+
     <style name="default_actionbar_style" parent="@style/Widget.Sherlock.ActionBar">
         <item name="background">@drawable/default_abs__ab_transparent_dark_holo</item>
         <item name="android:background">@drawable/default_abs__ab_transparent_dark_holo</item>

calculatorpp/res/values/theme_metro_blue.xml

@@ -4,18 +4,34 @@
 		<item name="android:background">@drawable/metro_button_dark</item>
 	</style>
 
+    <style name="widget_metro_digit_button_style" parent="metro_digit_button_style">
+        <item name="android:textSize">@dimen/widget_keyboard_button_text_size</item>
+    </style>
+
 	<style name="metro_control_button_style" parent="metro_digit_button_style">
 		<item name="android:background">@drawable/metro_button_light</item>
 	</style>
 
+    <style name="widget_metro_control_button_style" parent="metro_control_button_style">
+        <item name="android:textSize">@dimen/widget_keyboard_button_text_size</item>
+    </style>
+
 	<style name="metro_blue_operation_button_style" parent="metro_digit_button_style">
 		<item name="android:background">@drawable/metro_blue_button</item>
 	</style>
 
+    <style name="widget_metro_blue_operation_button_style" parent="metro_blue_operation_button_style">
+        <item name="android:textSize">@dimen/widget_keyboard_button_text_size</item>
+    </style>
+
 	<style name="metro_control_image_button_style" parent="metro_control_button_style">
 		<item name="android:padding">6dp</item>
 	</style>
 
+    <style name="widget_metro_control_image_button_style" parent="metro_control_image_button_style">
+        <item name="android:scaleType">center</item>
+    </style>
+
     <style name="metro_blue_fragment_list_view_item_style" parent="default_fragment_list_view_item_style">
         <item name="background">@drawable/metro_blue_list_item</item>
         <item name="android:background">@drawable/metro_blue_list_item</item>

calculatorpp/res/values/theme_metro_green.xml

@@ -1,34 +1,17 @@
 <resources>
 
-	<style name="metro_digit_button_style" parent="keyboard_button_style">
-		<item name="android:background">@drawable/metro_button_dark</item>
-	</style>
-
-	<style name="metro_control_button_style" parent="metro_digit_button_style">
-		<item name="android:background">@drawable/metro_button_light</item>
-	</style>
-
 	<style name="metro_green_operation_button_style" parent="metro_digit_button_style">
 		<item name="android:background">@drawable/metro_button_green</item>
 	</style>
 
-	<style name="metro_control_image_button_style" parent="metro_control_button_style">
-		<item name="android:padding">6dp</item>
-	</style>
-
     <style name="metro_green_fragment_list_view_item_style" parent="default_fragment_list_view_item_style">
         <item name="background">@drawable/metro_green_list_item</item>
         <item name="android:background">@drawable/metro_green_list_item</item>
     </style>
 
-    <style name="metro_green_theme" parent="default_theme">
+    <style name="metro_green_theme" parent="metro_blue_theme">
-		<item name="digitButtonStyle">@style/metro_digit_button_style</item>
-		<item name="controlButtonStyle">@style/metro_control_button_style</item>
-		<item name="controlImageButtonStyle">@style/metro_control_image_button_style</item>
 		<item name="operationButtonStyle">@style/metro_green_operation_button_style</item>
-
         <item name="fragmentListViewItemStyle">@style/metro_green_fragment_list_view_item_style</item>
-
     </style>
 
 </resources>

calculatorpp/res/values/theme_metro_purple.xml

@@ -1,34 +1,18 @@
 <resources>
 
-	<style name="metro_digit_button_style" parent="keyboard_button_style">
-		<item name="android:background">@drawable/metro_button_dark</item>
-	</style>
-
-	<style name="metro_control_button_style" parent="metro_digit_button_style">
-		<item name="android:background">@drawable/metro_button_light</item>
-	</style>
-
 	<style name="metro_purple_operation_button_style" parent="metro_digit_button_style">
 		<item name="android:background">@drawable/metro_button_purple</item>
 	</style>
 
-	<style name="metro_control_image_button_style" parent="metro_control_button_style">
-		<item name="android:padding">6dp</item>
-	</style>
 
     <style name="metro_purple_fragment_list_view_item_style" parent="default_fragment_list_view_item_style">
         <item name="background">@drawable/metro_purple_list_item</item>
         <item name="android:background">@drawable/metro_purple_list_item</item>
     </style>
 
-	<style name="metro_purple_theme" parent="default_theme">
+	<style name="metro_purple_theme" parent="metro_blue_theme">
-		<item name="digitButtonStyle">@style/metro_digit_button_style</item>
-		<item name="controlButtonStyle">@style/metro_control_button_style</item>
-		<item name="controlImageButtonStyle">@style/metro_control_image_button_style</item>
 		<item name="operationButtonStyle">@style/metro_purple_operation_button_style</item>
-
         <item name="fragmentListViewItemStyle">@style/metro_purple_fragment_list_view_item_style</item>
-
     </style>
 
 </resources>

calculatorpp/res/xml/calculator_widget_info.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<appwidget-provider xmlns:a="http://schemas.android.com/apk/res/android"
+                    a:minWidth="180dp"
+                    a:minHeight="220dp"
+                    a:initialLayout="@layout/widget_layout"
+                    a:previewImage="@drawable/widget_preview"
+                    a:resizeMode="horizontal|vertical">
+
+</appwidget-provider>

calculatorpp/src/main/java/org/solovyev/android/AndroidUtils2.java

@@ -1,35 +1,40 @@
-package org.solovyev.android;
+package org.solovyev.android;
-
+
-import android.support.v4.app.DialogFragment;
+import android.os.Looper;
-import android.support.v4.app.Fragment;
+import android.support.v4.app.DialogFragment;
-import android.support.v4.app.FragmentManager;
+import android.support.v4.app.Fragment;
-import android.support.v4.app.FragmentTransaction;
+import android.support.v4.app.FragmentManager;
-import org.jetbrains.annotations.NotNull;
+import android.support.v4.app.FragmentTransaction;
-
+import org.jetbrains.annotations.NotNull;
-/**
+
- * User: Solovyev_S
+/**
- * Date: 03.10.12
+ * User: Solovyev_S
- * Time: 10:48
+ * Date: 03.10.12
- */
+ * Time: 10:48
-public final class AndroidUtils2 {
+ */
-
+public final class AndroidUtils2 {
-    private AndroidUtils2() {
+
-        throw new AssertionError();
+    private AndroidUtils2() {
-    }
+        throw new AssertionError();
-
+    }
-    public static void showDialog(@NotNull DialogFragment dialogFragment,
+
-                                  @NotNull String fragmentTag,
+    public static void showDialog(@NotNull DialogFragment dialogFragment,
-                                  @NotNull FragmentManager fm) {
+                                  @NotNull String fragmentTag,
-        final FragmentTransaction ft = fm.beginTransaction();
+                                  @NotNull FragmentManager fm) {
-
+        final FragmentTransaction ft = fm.beginTransaction();
-        Fragment prev = fm.findFragmentByTag(fragmentTag);
+
-        if (prev != null) {
+        Fragment prev = fm.findFragmentByTag(fragmentTag);
-            ft.remove(prev);
+        if (prev != null) {
-        }
+            ft.remove(prev);
-        ft.addToBackStack(null);
+        }
-
+        ft.addToBackStack(null);
-        // Create and show the dialog.
+
-        dialogFragment.show(ft, fragmentTag);
+        // Create and show the dialog.
-
+        dialogFragment.show(ft, fragmentTag);
-    }
+
-}
+    }
+
+    public static boolean isUiThread() {
+        return Looper.myLooper() == Looper.getMainLooper();
+    }
+}

calculatorpp/src/main/java/org/solovyev/android/calculator/AbstractCalculatorHelper.java

@@ -1,238 +1,238 @@
-package org.solovyev.android.calculator;
+package org.solovyev.android.calculator;
-
+
-import android.app.Activity;
+import android.app.Activity;
-import android.content.SharedPreferences;
+import android.content.SharedPreferences;
-import android.os.Vibrator;
+import android.os.Vibrator;
-import android.preference.PreferenceManager;
+import android.preference.PreferenceManager;
-import android.util.Log;
+import android.util.Log;
-import android.view.MotionEvent;
+import android.view.MotionEvent;
-import android.view.View;
+import android.view.View;
-import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
+import org.jetbrains.annotations.Nullable;
-import org.solovyev.android.calculator.history.CalculatorHistoryState;
+import org.solovyev.android.calculator.history.CalculatorHistoryState;
-import org.solovyev.android.calculator.view.AngleUnitsButton;
+import org.solovyev.android.calculator.view.AngleUnitsButton;
-import org.solovyev.android.calculator.view.NumeralBasesButton;
+import org.solovyev.android.calculator.view.NumeralBasesButton;
-import org.solovyev.android.calculator.view.OnDragListenerVibrator;
+import org.solovyev.android.calculator.view.OnDragListenerVibrator;
-import org.solovyev.android.history.HistoryDragProcessor;
+import org.solovyev.android.history.HistoryDragProcessor;
-import org.solovyev.android.view.drag.*;
+import org.solovyev.android.view.drag.*;
-import org.solovyev.common.Announcer;
+import org.solovyev.common.Announcer;
-import org.solovyev.common.math.Point2d;
+import org.solovyev.common.math.Point2d;
-
+
-import java.lang.reflect.Field;
+import java.lang.reflect.Field;
-import java.lang.reflect.Modifier;
+import java.lang.reflect.Modifier;
-import java.util.ArrayList;
+import java.util.ArrayList;
-import java.util.List;
+import java.util.List;
-
+
-/**
+/**
- * User: serso
+ * User: serso
- * Date: 9/28/12
+ * Date: 9/28/12
- * Time: 12:12 AM
+ * Time: 12:12 AM
- */
+ */
-public abstract class AbstractCalculatorHelper implements SharedPreferences.OnSharedPreferenceChangeListener {
+public abstract class AbstractCalculatorHelper implements SharedPreferences.OnSharedPreferenceChangeListener {
-
+
-    @NotNull
+    @NotNull
-    private CalculatorPreferences.Gui.Layout layout;
+    private CalculatorPreferences.Gui.Layout layout;
-
+
-    @NotNull
+    @NotNull
-    private CalculatorPreferences.Gui.Theme theme;
+    private CalculatorPreferences.Gui.Theme theme;
-
+
-    @Nullable
+    @Nullable
-    private Vibrator vibrator;
+    private Vibrator vibrator;
-
+
-    @NotNull
+    @NotNull
-    private final Announcer<DragPreferencesChangeListener> dpclRegister = new Announcer<DragPreferencesChangeListener>(DragPreferencesChangeListener.class);
+    private final Announcer<DragPreferencesChangeListener> dpclRegister = new Announcer<DragPreferencesChangeListener>(DragPreferencesChangeListener.class);
-
+
-    @NotNull
+    @NotNull
-    private String logTag = "CalculatorActivity";
+    private String logTag = "CalculatorActivity";
-
+
-    protected AbstractCalculatorHelper() {
+    protected AbstractCalculatorHelper() {
-    }
+    }
-
+
-    protected AbstractCalculatorHelper(@NotNull String logTag) {
+    protected AbstractCalculatorHelper(@NotNull String logTag) {
-        this.logTag = logTag;
+        this.logTag = logTag;
-    }
+    }
-
+
-    protected void onCreate(@NotNull Activity activity) {
+    protected void onCreate(@NotNull Activity activity) {
-        final SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(activity);
+        final SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(activity);
-
+
-        vibrator = (Vibrator) activity.getSystemService(Activity.VIBRATOR_SERVICE);
+        vibrator = (Vibrator) activity.getSystemService(Activity.VIBRATOR_SERVICE);
-        layout = CalculatorPreferences.Gui.layout.getPreferenceNoError(preferences);
+        layout = CalculatorPreferences.Gui.layout.getPreferenceNoError(preferences);
-        theme = CalculatorPreferences.Gui.theme.getPreferenceNoError(preferences);
+        theme = CalculatorPreferences.Gui.theme.getPreferenceNoError(preferences);
-
+
-        preferences.registerOnSharedPreferenceChangeListener(this);
+        preferences.registerOnSharedPreferenceChangeListener(this);
-    }
+    }
-
+
-    public void logDebug(@NotNull String message) {
+    public void logDebug(@NotNull String message) {
-        Log.d(logTag, message);
+        Log.d(logTag, message);
-    }
+    }
-
+
-    public void logError(@NotNull String message) {
+    public void logError(@NotNull String message) {
-        Log.e(logTag, message);
+        Log.e(logTag, message);
-    }
+    }
-
+
-    public void processButtons(@NotNull final Activity activity, @NotNull View root) {
+    public void processButtons(@NotNull final Activity activity, @NotNull View root) {
-        dpclRegister.clear();
+        dpclRegister.clear();
-
+
-        final SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(activity);
+        final SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(activity);
-        final SimpleOnDragListener.Preferences dragPreferences = SimpleOnDragListener.getPreferences(preferences, activity);
+        final SimpleOnDragListener.Preferences dragPreferences = SimpleOnDragListener.getPreferences(preferences, activity);
-
+
-        setOnDragListeners(root, dragPreferences, preferences);
+        setOnDragListeners(root, dragPreferences, preferences);
-
+
-        final OnDragListener historyOnDragListener = new OnDragListenerVibrator(newOnDragListener(new HistoryDragProcessor<CalculatorHistoryState>(getCalculator()), dragPreferences), vibrator, preferences);
+        final OnDragListener historyOnDragListener = new OnDragListenerVibrator(newOnDragListener(new HistoryDragProcessor<CalculatorHistoryState>(getCalculator()), dragPreferences), vibrator, preferences);
-        final DragButton historyButton = getButton(root, R.id.historyButton);
+        final DragButton historyButton = getButton(root, R.id.historyButton);
-        if (historyButton != null) {
+        if (historyButton != null) {
-            historyButton.setOnDragListener(historyOnDragListener);
+            historyButton.setOnDragListener(historyOnDragListener);
-        }
+        }
-
+
-        final DragButton subtractionButton = getButton(root, R.id.subtractionButton);
+        final DragButton subtractionButton = getButton(root, R.id.subtractionButton);
-        if (subtractionButton != null) {
+        if (subtractionButton != null) {
-            subtractionButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new SimpleOnDragListener.DragProcessor() {
+            subtractionButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new SimpleOnDragListener.DragProcessor() {
-                @Override
+                @Override
-                public boolean processDragEvent(@NotNull DragDirection dragDirection, @NotNull DragButton dragButton, @NotNull Point2d startPoint2d, @NotNull MotionEvent motionEvent) {
+                public boolean processDragEvent(@NotNull DragDirection dragDirection, @NotNull DragButton dragButton, @NotNull Point2d startPoint2d, @NotNull MotionEvent motionEvent) {
-                    if (dragDirection == DragDirection.down) {
+                    if (dragDirection == DragDirection.down) {
-                        CalculatorActivity.operatorsButtonClickHandler(activity);
+                        CalculatorLocatorImpl.getInstance().getCalculator().fireCalculatorEvent(CalculatorEventType.show_operators, null);
-                        return true;
+                        return true;
-                    }
+                    }
-                    return false;
+                    return false;
-                }
+                }
-            }, dragPreferences), vibrator, preferences));
+            }, dragPreferences), vibrator, preferences));
-        }
+        }
-
+
-        final OnDragListener toPositionOnDragListener = new OnDragListenerVibrator(new SimpleOnDragListener(new CursorDragProcessor(), dragPreferences), vibrator, preferences);
+        final OnDragListener toPositionOnDragListener = new OnDragListenerVibrator(new SimpleOnDragListener(new CursorDragProcessor(), dragPreferences), vibrator, preferences);
-
+
-        final DragButton rightButton = getButton(root, R.id.rightButton);
+        final DragButton rightButton = getButton(root, R.id.rightButton);
-        if (rightButton != null) {
+        if (rightButton != null) {
-            rightButton.setOnDragListener(toPositionOnDragListener);
+            rightButton.setOnDragListener(toPositionOnDragListener);
-        }
+        }
-
+
-        final DragButton leftButton = getButton(root, R.id.leftButton);
+        final DragButton leftButton = getButton(root, R.id.leftButton);
-        if (leftButton != null) {
+        if (leftButton != null) {
-            leftButton.setOnDragListener(toPositionOnDragListener);
+            leftButton.setOnDragListener(toPositionOnDragListener);
-        }
+        }
-
+
-        final DragButton equalsButton = getButton(root, R.id.equalsButton);
+        final DragButton equalsButton = getButton(root, R.id.equalsButton);
-        if (equalsButton != null) {
+        if (equalsButton != null) {
-            equalsButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new EvalDragProcessor(), dragPreferences), vibrator, preferences));
+            equalsButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new EvalDragProcessor(), dragPreferences), vibrator, preferences));
-        }
+        }
-
+
-        final AngleUnitsButton angleUnitsButton = (AngleUnitsButton) getButton(root, R.id.sixDigitButton);
+        final AngleUnitsButton angleUnitsButton = (AngleUnitsButton) getButton(root, R.id.sixDigitButton);
-        if (angleUnitsButton != null) {
+        if (angleUnitsButton != null) {
-            angleUnitsButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new CalculatorButtons.AngleUnitsChanger(activity), dragPreferences), vibrator, preferences));
+            angleUnitsButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new CalculatorButtons.AngleUnitsChanger(activity), dragPreferences), vibrator, preferences));
-        }
+        }
-
+
-        final NumeralBasesButton clearButton = (NumeralBasesButton) getButton(root, R.id.clearButton);
+        final NumeralBasesButton clearButton = (NumeralBasesButton) getButton(root, R.id.clearButton);
-        if (clearButton != null) {
+        if (clearButton != null) {
-            clearButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new CalculatorButtons.NumeralBasesChanger(activity), dragPreferences), vibrator, preferences));
+            clearButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new CalculatorButtons.NumeralBasesChanger(activity), dragPreferences), vibrator, preferences));
-        }
+        }
-
+
-        final DragButton varsButton = getButton(root, R.id.varsButton);
+        final DragButton varsButton = getButton(root, R.id.varsButton);
-        if (varsButton != null) {
+        if (varsButton != null) {
-            varsButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new CalculatorButtons.VarsDragProcessor(activity), dragPreferences), vibrator, preferences));
+            varsButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new CalculatorButtons.VarsDragProcessor(activity), dragPreferences), vibrator, preferences));
-        }
+        }
-
+
-        final DragButton roundBracketsButton = getButton(root, R.id.roundBracketsButton);
+        final DragButton roundBracketsButton = getButton(root, R.id.roundBracketsButton);
-        if (roundBracketsButton != null) {
+        if (roundBracketsButton != null) {
-            roundBracketsButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new CalculatorButtons.RoundBracketsDragProcessor(), dragPreferences), vibrator, preferences));
+            roundBracketsButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new CalculatorButtons.RoundBracketsDragProcessor(), dragPreferences), vibrator, preferences));
-        }
+        }
-
+
-        if (layout == CalculatorPreferences.Gui.Layout.simple) {
+        if (layout == CalculatorPreferences.Gui.Layout.simple) {
-            toggleButtonDirectionText(root, R.id.oneDigitButton, false, DragDirection.up, DragDirection.down);
+            toggleButtonDirectionText(root, R.id.oneDigitButton, false, DragDirection.up, DragDirection.down);
-            toggleButtonDirectionText(root, R.id.twoDigitButton, false, DragDirection.up, DragDirection.down);
+            toggleButtonDirectionText(root, R.id.twoDigitButton, false, DragDirection.up, DragDirection.down);
-            toggleButtonDirectionText(root, R.id.threeDigitButton, false, DragDirection.up, DragDirection.down);
+            toggleButtonDirectionText(root, R.id.threeDigitButton, false, DragDirection.up, DragDirection.down);
-
+
-            toggleButtonDirectionText(root, R.id.sixDigitButton, false, DragDirection.up, DragDirection.down);
+            toggleButtonDirectionText(root, R.id.sixDigitButton, false, DragDirection.up, DragDirection.down);
-            toggleButtonDirectionText(root, R.id.sevenDigitButton, false, DragDirection.left, DragDirection.up, DragDirection.down);
+            toggleButtonDirectionText(root, R.id.sevenDigitButton, false, DragDirection.left, DragDirection.up, DragDirection.down);
-            toggleButtonDirectionText(root, R.id.eightDigitButton, false, DragDirection.left, DragDirection.up, DragDirection.down);
+            toggleButtonDirectionText(root, R.id.eightDigitButton, false, DragDirection.left, DragDirection.up, DragDirection.down);
-
+
-            toggleButtonDirectionText(root, R.id.clearButton, false, DragDirection.left, DragDirection.up, DragDirection.down);
+            toggleButtonDirectionText(root, R.id.clearButton, false, DragDirection.left, DragDirection.up, DragDirection.down);
-
+
-            toggleButtonDirectionText(root, R.id.fourDigitButton, false, DragDirection.down);
+            toggleButtonDirectionText(root, R.id.fourDigitButton, false, DragDirection.down);
-            toggleButtonDirectionText(root, R.id.fiveDigitButton, false, DragDirection.down);
+            toggleButtonDirectionText(root, R.id.fiveDigitButton, false, DragDirection.down);
-
+
-            toggleButtonDirectionText(root, R.id.nineDigitButton, false, DragDirection.left);
+            toggleButtonDirectionText(root, R.id.nineDigitButton, false, DragDirection.left);
-
+
-            toggleButtonDirectionText(root, R.id.multiplicationButton, false, DragDirection.left);
+            toggleButtonDirectionText(root, R.id.multiplicationButton, false, DragDirection.left);
-            toggleButtonDirectionText(root, R.id.plusButton, false, DragDirection.down, DragDirection.up);
+            toggleButtonDirectionText(root, R.id.plusButton, false, DragDirection.down, DragDirection.up);
-        }
+        }
-
+
-        CalculatorButtons.processButtons(true, theme, root);
+        CalculatorButtons.processButtons(true, theme, root);
-        CalculatorButtons.toggleEqualsButton(preferences, activity);
+        CalculatorButtons.toggleEqualsButton(preferences, activity);
-        CalculatorButtons.initMultiplicationButton(root);
+        CalculatorButtons.initMultiplicationButton(root);
-        NumeralBaseButtons.toggleNumericDigits(activity, preferences);
+        NumeralBaseButtons.toggleNumericDigits(activity, preferences);
-    }
+    }
-
+
-    private void toggleButtonDirectionText(@NotNull View root, int id, boolean showDirectionText, @NotNull DragDirection... dragDirections) {
+    private void toggleButtonDirectionText(@NotNull View root, int id, boolean showDirectionText, @NotNull DragDirection... dragDirections) {
-        final View v = getButton(root, id);
+        final View v = getButton(root, id);
-        if (v instanceof DirectionDragButton ) {
+        if (v instanceof DirectionDragButton ) {
-            final DirectionDragButton button = (DirectionDragButton)v;
+            final DirectionDragButton button = (DirectionDragButton)v;
-            for (DragDirection dragDirection : dragDirections) {
+            for (DragDirection dragDirection : dragDirections) {
-                button.showDirectionText(showDirectionText, dragDirection);
+                button.showDirectionText(showDirectionText, dragDirection);
-            }
+            }
-        }
+        }
-    }
+    }
-
+
-    @NotNull
+    @NotNull
-    private Calculator getCalculator() {
+    private Calculator getCalculator() {
-        return CalculatorLocatorImpl.getInstance().getCalculator();
+        return CalculatorLocatorImpl.getInstance().getCalculator();
-    }
+    }
-
+
-
+
-    private void setOnDragListeners(@NotNull View root, @NotNull SimpleOnDragListener.Preferences dragPreferences, @NotNull SharedPreferences preferences) {
+    private void setOnDragListeners(@NotNull View root, @NotNull SimpleOnDragListener.Preferences dragPreferences, @NotNull SharedPreferences preferences) {
-        final OnDragListener onDragListener = new OnDragListenerVibrator(newOnDragListener(new DigitButtonDragProcessor(getKeyboard()), dragPreferences), vibrator, preferences);
+        final OnDragListener onDragListener = new OnDragListenerVibrator(newOnDragListener(new DigitButtonDragProcessor(getKeyboard()), dragPreferences), vibrator, preferences);
-
+
-        final List<Integer> dragButtonIds = new ArrayList<Integer>();
+        final List<Integer> dragButtonIds = new ArrayList<Integer>();
-
+
-        for (Field field : R.id.class.getDeclaredFields()) {
+        for (Field field : R.id.class.getDeclaredFields()) {
-            int modifiers = field.getModifiers();
+            int modifiers = field.getModifiers();
-            if (Modifier.isFinal(modifiers) && Modifier.isStatic(modifiers)) {
+            if (Modifier.isFinal(modifiers) && Modifier.isStatic(modifiers)) {
-                try {
+                try {
-                    int viewId = field.getInt(R.id.class);
+                    int viewId = field.getInt(R.id.class);
-                    final View view = root.findViewById(viewId);
+                    final View view = root.findViewById(viewId);
-                    if (view instanceof DragButton) {
+                    if (view instanceof DragButton) {
-                        dragButtonIds.add(viewId);
+                        dragButtonIds.add(viewId);
-                    }
+                    }
-                } catch (IllegalAccessException e) {
+                } catch (IllegalAccessException e) {
-                    Log.e(R.id.class.getName(), e.getMessage());
+                    Log.e(R.id.class.getName(), e.getMessage());
-                }
+                }
-            }
+            }
-        }
+        }
-
+
-        for (Integer dragButtonId : dragButtonIds) {
+        for (Integer dragButtonId : dragButtonIds) {
-            final DragButton button = getButton(root, dragButtonId);
+            final DragButton button = getButton(root, dragButtonId);
-            if (button != null) {
+            if (button != null) {
-                button.setOnDragListener(onDragListener);
+                button.setOnDragListener(onDragListener);
-            }
+            }
-        }
+        }
-    }
+    }
-
+
-    @NotNull
+    @NotNull
-    private CalculatorKeyboard getKeyboard() {
+    private CalculatorKeyboard getKeyboard() {
-        return CalculatorLocatorImpl.getInstance().getKeyboard();
+        return CalculatorLocatorImpl.getInstance().getKeyboard();
-    }
+    }
-
+
-    @Nullable
+    @Nullable
-    private <T extends DragButton> T getButton(@NotNull View root, int buttonId) {
+    private <T extends DragButton> T getButton(@NotNull View root, int buttonId) {
-        return (T) root.findViewById(buttonId);
+        return (T) root.findViewById(buttonId);
-    }
+    }
-
+
-    @NotNull
+    @NotNull
-    private SimpleOnDragListener newOnDragListener(@NotNull SimpleOnDragListener.DragProcessor dragProcessor,
+    private SimpleOnDragListener newOnDragListener(@NotNull SimpleOnDragListener.DragProcessor dragProcessor,
-                                                          @NotNull SimpleOnDragListener.Preferences dragPreferences) {
+                                                          @NotNull SimpleOnDragListener.Preferences dragPreferences) {
-        final SimpleOnDragListener onDragListener = new SimpleOnDragListener(dragProcessor, dragPreferences);
+        final SimpleOnDragListener onDragListener = new SimpleOnDragListener(dragProcessor, dragPreferences);
-        dpclRegister.addListener(onDragListener);
+        dpclRegister.addListener(onDragListener);
-        return onDragListener;
+        return onDragListener;
-    }
+    }
-
+
-    @Override
+    @Override
-    public void onSharedPreferenceChanged(SharedPreferences preferences, String key) {
+    public void onSharedPreferenceChanged(SharedPreferences preferences, String key) {
-        if (key != null && key.startsWith("org.solovyev.android.calculator.DragButtonCalibrationActivity")) {
+        if (key != null && key.startsWith("org.solovyev.android.calculator.DragButtonCalibrationActivity")) {
-            dpclRegister.announce().onDragPreferencesChange(SimpleOnDragListener.getPreferences(preferences, CalculatorApplication.getInstance()));
+            dpclRegister.announce().onDragPreferencesChange(SimpleOnDragListener.getPreferences(preferences, CalculatorApplication.getInstance()));
-        }
+        }
-    }
+    }
-
+
-    public void onDestroy(@NotNull Activity activity) {
+    public void onDestroy(@NotNull Activity activity) {
-        final SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(activity);
+        final SharedPreferences preferences = PreferenceManager.getDefaultSharedPreferences(activity);
-
+
-        preferences.unregisterOnSharedPreferenceChangeListener(this);
+        preferences.unregisterOnSharedPreferenceChangeListener(this);
-    }
+    }
-}
+}

calculatorpp/src/main/java/org/solovyev/android/calculator/AndroidCalculator.java

@@ -21,11 +21,15 @@ import java.util.List;
  * Date: 9/22/12
  * Time: 5:42 PM
  */
-public class AndroidCalculator implements Calculator {
+public class AndroidCalculator implements Calculator, CalculatorEventListener {
 
     @NotNull
     private final Calculator calculator = new CalculatorImpl();
 
+    public AndroidCalculator() {
+        this.calculator.addCalculatorEventListener(this);
+    }
+
     public static void showEvaluationError(@NotNull Context context, @NotNull final String errorMessage) {
         final LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
 
@@ -170,4 +174,45 @@ public class AndroidCalculator implements Calculator {
         calculator.simplify();
     }
 
+    @Override
+    public void onCalculatorEvent(@NotNull CalculatorEventData calculatorEventData, @NotNull CalculatorEventType calculatorEventType, @Nullable Object data) {
+        switch (calculatorEventType) {
+            case show_history:
+                CalculatorActivityLauncher.showHistory(CalculatorApplication.getInstance());
+                break;
+            case show_history_detached:
+                CalculatorActivityLauncher.showHistory(CalculatorApplication.getInstance(), true);
+                break;
+            case show_functions:
+                CalculatorActivityLauncher.showFunctions(CalculatorApplication.getInstance());
+                break;
+            case show_functions_detached:
+                CalculatorActivityLauncher.showFunctions(CalculatorApplication.getInstance(), true);
+                break;
+            case show_operators:
+                CalculatorActivityLauncher.showOperators(CalculatorApplication.getInstance());
+                break;
+            case show_operators_detached:
+                CalculatorActivityLauncher.showOperators(CalculatorApplication.getInstance(), true);
+                break;
+            case show_vars:
+                CalculatorActivityLauncher.showVars(CalculatorApplication.getInstance());
+                break;
+            case show_vars_detached:
+                CalculatorActivityLauncher.showVars(CalculatorApplication.getInstance(), true);
+                break;
+            case show_settings:
+                CalculatorActivityLauncher.showSettings(CalculatorApplication.getInstance());
+                break;
+            case show_settings_detached:
+                CalculatorActivityLauncher.showSettings(CalculatorApplication.getInstance(), true);
+                break;
+            case show_like_dialog:
+                CalculatorActivityLauncher.likeButtonPressed(CalculatorApplication.getInstance());
+                break;
+            case open_app:
+                CalculatorActivityLauncher.openApp(CalculatorApplication.getInstance());
+                break;
+        }
+    }
 }

calculatorpp/src/main/java/org/solovyev/android/calculator/AndroidCalculatorEditorView.java

@@ -47,9 +47,8 @@ public class AndroidCalculatorEditorView extends EditText implements SharedPrefe
 
     private volatile boolean viewStateChange = false;
 
-    // NOTE: static because super constructor calls some overridden methods (like onSelectionChanged and current lock is not yet created)
+    @Nullable
-    @NotNull
+    private final Object viewLock = new Object();
-    private static final Object viewLock = new Object();
 
     @NotNull
     private final Handler uiHandler = new Handler();
@@ -154,45 +153,51 @@ public class AndroidCalculatorEditorView extends EditText implements SharedPrefe
 
     @Override
     public void setState(@NotNull final CalculatorEditorViewState viewState) {
-        synchronized (viewLock) {
+        if (viewLock != null) {
+            synchronized (viewLock) {
 
-            final CharSequence text = prepareText(viewState.getText(), highlightText);
+                final CharSequence text = prepareText(viewState.getText(), highlightText);
 
-            uiHandler.post(new Runnable() {
+                uiHandler.post(new Runnable() {
-                @Override
+                    @Override
-                public void run() {
+                    public void run() {
-                    final AndroidCalculatorEditorView editorView = AndroidCalculatorEditorView.this;
+                        final AndroidCalculatorEditorView editorView = AndroidCalculatorEditorView.this;
-                    synchronized (viewLock) {
+                        synchronized (viewLock) {
-                        try {
+                            try {
-                            editorView.viewStateChange = true;
+                                editorView.viewStateChange = true;
-                            editorView.viewState = viewState;
+                                editorView.viewState = viewState;
-                            editorView.setText(text, BufferType.EDITABLE);
+                                editorView.setText(text, BufferType.EDITABLE);
-                            editorView.setSelection(viewState.getSelection());
+                                editorView.setSelection(viewState.getSelection());
-                        } finally {
+                            } finally {
-                            editorView.viewStateChange = false;
+                                editorView.viewStateChange = false;
+                            }
                         }
                     }
-                }
+                });
-            });
+            }
         }
     }
 
     @Override
     protected void onSelectionChanged(int selStart, int selEnd) {
-        synchronized (viewLock) {
+        if (viewLock != null) {
-            if (!viewStateChange) {
+            synchronized (viewLock) {
-                // external text change => need to notify editor
+                if (!viewStateChange) {
-                super.onSelectionChanged(selStart, selEnd);
+                    // external text change => need to notify editor
-                CalculatorLocatorImpl.getInstance().getEditor().setSelection(selStart);
+                    super.onSelectionChanged(selStart, selEnd);
+                    CalculatorLocatorImpl.getInstance().getEditor().setSelection(selStart);
+                }
             }
         }
     }
 
     public void handleTextChange(Editable s) {
-        synchronized (viewLock) {
+        if (viewLock != null) {
-            if (!viewStateChange) {
+            synchronized (viewLock) {
-                // external text change => need to notify editor
+                if (!viewStateChange) {
-                CalculatorLocatorImpl.getInstance().getEditor().setText(String.valueOf(s));
+                    // external text change => need to notify editor
+                    CalculatorLocatorImpl.getInstance().getEditor().setText(String.valueOf(s));
+                }
             }
         }
     }

calculatorpp/src/main/java/org/solovyev/android/calculator/AndroidCalculatorNotifier.java

@@ -1,9 +1,11 @@
 package org.solovyev.android.calculator;
 
 import android.app.Application;
+import android.os.Handler;
 import android.widget.Toast;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
+import org.solovyev.android.AndroidUtils2;
 import org.solovyev.android.msg.AndroidMessage;
 import org.solovyev.common.msg.Message;
 import org.solovyev.common.msg.MessageType;
@@ -20,13 +22,18 @@ public class AndroidCalculatorNotifier implements CalculatorNotifier {
     @NotNull
     private final Application application;
 
+    @NotNull
+    private final Handler uiHandler = new Handler();
+
     public AndroidCalculatorNotifier(@NotNull Application application) {
+        assert AndroidUtils2.isUiThread();
+
         this.application = application;
     }
 
     @Override
     public void showMessage(@NotNull Message message) {
-        Toast.makeText(application, message.getLocalizedMessage(), Toast.LENGTH_SHORT).show();
+        showMessageInUiThread(message.getLocalizedMessage());
     }
 
     @Override
@@ -38,4 +45,25 @@ public class AndroidCalculatorNotifier implements CalculatorNotifier {
     public void showMessage(@NotNull Integer messageCode, @NotNull MessageType messageType, @Nullable Object... parameters) {
         showMessage(new AndroidMessage(messageCode, messageType, application, parameters));
     }
+
+    @Override
+    public void showDebugMessage(@Nullable final String tag, @NotNull final String message) {
+        /*if (AndroidUtils.isDebuggable(application)) {
+            showMessageInUiThread(tag == null ? message : tag + ": " + message);
+        }*/
+    }
+
+    private void showMessageInUiThread(@NotNull final String message) {
+        if (AndroidUtils2.isUiThread()) {
+            Toast.makeText(application, message, Toast.LENGTH_SHORT).show();
+        } else {
+            uiHandler.post(new Runnable() {
+                @Override
+                public void run() {
+                    Toast.makeText(application,message, Toast.LENGTH_SHORT).show();
+                }
+            });
+        }
+    }
+
 }

calculatorpp/src/main/java/org/solovyev/android/calculator/CalculatorActivity.java

@@ -5,7 +5,6 @@
 
 package org.solovyev.android.calculator;
 
-import android.app.Activity;
 import android.app.AlertDialog;
 import android.content.Context;
 import android.content.SharedPreferences;
@@ -18,6 +17,7 @@ import android.util.Log;
 import android.view.KeyEvent;
 import android.view.LayoutInflater;
 import android.view.View;
+import android.widget.Button;
 import android.widget.TextView;
 import com.actionbarsherlock.app.SherlockFragmentActivity;
 import org.jetbrains.annotations.NotNull;
@@ -167,7 +167,7 @@ public class CalculatorActivity extends SherlockFragmentActivity implements Shar
 
     @SuppressWarnings({"UnusedDeclaration"})
     public void equalsButtonClickHandler(@NotNull View v) {
-        getCalculator().evaluate();
+        buttonPressed(CalculatorSpecialButton.equals);
     }
 
     @Override
@@ -241,12 +241,12 @@ public class CalculatorActivity extends SherlockFragmentActivity implements Shar
 
     @SuppressWarnings({"UnusedDeclaration"})
     public void historyButtonClickHandler(@NotNull View v) {
-        CalculatorActivityLauncher.showHistory(this);
+        buttonPressed(CalculatorSpecialButton.history);
     }
 
     @SuppressWarnings({"UnusedDeclaration"})
     public void eraseButtonClickHandler(@NotNull View v) {
-        CalculatorLocatorImpl.getInstance().getEditor().erase();
+        buttonPressed(CalculatorSpecialButton.erase);
     }
 
     @SuppressWarnings({"UnusedDeclaration"})
@@ -254,24 +254,14 @@ public class CalculatorActivity extends SherlockFragmentActivity implements Shar
         throw new UnsupportedOperationException("Not implemented yet!");
     }
 
-    @SuppressWarnings({"UnusedDeclaration"})
-    public void moveLeftButtonClickHandler(@NotNull View v) {
-        getKeyboard().moveCursorLeft();
-    }
-
-    @SuppressWarnings({"UnusedDeclaration"})
-    public void moveRightButtonClickHandler(@NotNull View v) {
-        getKeyboard().moveCursorRight();
-    }
-
     @SuppressWarnings({"UnusedDeclaration"})
     public void pasteButtonClickHandler(@NotNull View v) {
-        getKeyboard().pasteButtonPressed();
+        buttonPressed(CalculatorSpecialButton.paste);
     }
 
     @SuppressWarnings({"UnusedDeclaration"})
     public void copyButtonClickHandler(@NotNull View v) {
-        getKeyboard().copyButtonPressed();
+        buttonPressed(CalculatorSpecialButton.copy);
     }
 
     @NotNull
@@ -281,39 +271,52 @@ public class CalculatorActivity extends SherlockFragmentActivity implements Shar
 
     @SuppressWarnings({"UnusedDeclaration"})
     public void clearButtonClickHandler(@NotNull View v) {
-        getKeyboard().clearButtonPressed();
+        buttonPressed(CalculatorSpecialButton.clear);
     }
 
     @SuppressWarnings({"UnusedDeclaration"})
     public void digitButtonClickHandler(@NotNull View v) {
         Log.d(String.valueOf(v.getId()), "digitButtonClickHandler() for: " + v.getId() + ". Pressed: " + v.isPressed());
-        if (((ColorButton) v).isShowText()) {
+
-            getKeyboard().digitButtonPressed(((ColorButton) v).getText().toString());
+        if (v instanceof Button) {
+
+            boolean processText = true;
+            if ( v instanceof ColorButton) {
+                processText = ((ColorButton) v).isShowText();
+            }
+
+            if ( processText ) {
+                buttonPressed(((Button)v).getText().toString());
+            }
         }
     }
 
+    private void buttonPressed(@NotNull CalculatorSpecialButton button) {
+        buttonPressed(button.getActionCode());
+    }
+
+    private void buttonPressed(@NotNull String text) {
+        getKeyboard().buttonPressed(text);
+    }
+
     @SuppressWarnings({"UnusedDeclaration"})
     public void functionsButtonClickHandler(@NotNull View v) {
-        CalculatorActivityLauncher.showFunctions(this);
+        buttonPressed(CalculatorSpecialButton.functions);
     }
 
     @SuppressWarnings({"UnusedDeclaration"})
     public void operatorsButtonClickHandler(@NotNull View v) {
-        CalculatorActivityLauncher.showOperators(this);
+        buttonPressed(CalculatorSpecialButton.operators);
-    }
-
-    public static void operatorsButtonClickHandler(@NotNull Activity activity) {
-        CalculatorActivityLauncher.showOperators(activity);
     }
 
     @SuppressWarnings({"UnusedDeclaration"})
     public void varsButtonClickHandler(@NotNull View v) {
-        CalculatorActivityLauncher.showVars(this);
+        buttonPressed(CalculatorSpecialButton.vars);
     }
 
     @SuppressWarnings({"UnusedDeclaration"})
     public void likeButtonClickHandler(@NotNull View v) {
-        CalculatorApplication.likeButtonPressed(this);
+        buttonPressed(CalculatorSpecialButton.like);
     }
 
 }

calculatorpp/src/main/java/org/solovyev/android/calculator/CalculatorActivityLauncher.java

@@ -1,85 +1,138 @@
-package org.solovyev.android.calculator;
+package org.solovyev.android.calculator;
-
+
-import android.content.Context;
+import android.content.Context;
-import android.content.Intent;
+import android.content.Intent;
-import com.actionbarsherlock.app.SherlockFragmentActivity;
+import android.net.Uri;
-import jscl.math.Generic;
+import com.actionbarsherlock.app.SherlockFragmentActivity;
-import jscl.math.function.Constant;
+import jscl.math.Generic;
-import org.achartengine.ChartFactory;
+import jscl.math.function.Constant;
-import org.jetbrains.annotations.NotNull;
+import org.achartengine.ChartFactory;
-import org.solovyev.android.calculator.about.CalculatorAboutActivity;
+import org.jetbrains.annotations.NotNull;
-import org.solovyev.android.calculator.help.CalculatorHelpActivity;
+import org.solovyev.android.calculator.about.CalculatorAboutActivity;
-import org.solovyev.android.calculator.history.CalculatorHistoryActivity;
+import org.solovyev.android.calculator.help.CalculatorHelpActivity;
-import org.solovyev.android.calculator.math.edit.*;
+import org.solovyev.android.calculator.history.CalculatorHistoryActivity;
-import org.solovyev.android.calculator.plot.CalculatorPlotActivity;
+import org.solovyev.android.calculator.math.edit.*;
-import org.solovyev.android.calculator.plot.CalculatorPlotFragment;
+import org.solovyev.android.calculator.plot.CalculatorPlotActivity;
-import org.solovyev.common.msg.MessageType;
+import org.solovyev.android.calculator.plot.CalculatorPlotFragment;
-import org.solovyev.common.text.StringUtils;
+import org.solovyev.common.msg.MessageType;
-
+import org.solovyev.common.text.StringUtils;
-/**
+
- * User: serso
+/**
- * Date: 11/2/11
+ * User: serso
- * Time: 2:18 PM
+ * Date: 11/2/11
- */
+ * Time: 2:18 PM
-public class CalculatorActivityLauncher {
+ */
-
+public class CalculatorActivityLauncher {
-	public static void showHistory(@NotNull final Context context) {
+
-		context.startActivity(new Intent(context, CalculatorHistoryActivity.class));
+	public static void showHistory(@NotNull final Context context) {
-	}
+        showHistory(context, false);
-
+    }
-	public static void showHelp(@NotNull final Context context) {
+
-		context.startActivity(new Intent(context, CalculatorHelpActivity.class));
+	public static void showHistory(@NotNull final Context context, boolean detached) {
-	}
+        final Intent intent = new Intent(context, CalculatorHistoryActivity.class);
-
+        addFlags(intent, detached);
-	public static void showSettings(@NotNull final Context context) {
+        context.startActivity(intent);
-		context.startActivity(new Intent(context, CalculatorPreferencesActivity.class));
+	}
-	}
+
-
+	public static void showHelp(@NotNull final Context context) {
-	public static void showAbout(@NotNull final Context context) {
+		context.startActivity(new Intent(context, CalculatorHelpActivity.class));
-		context.startActivity(new Intent(context, CalculatorAboutActivity.class));
+	}
-	}
+
-
+	public static void showSettings(@NotNull final Context context) {
-	public static void showFunctions(@NotNull final Context context) {
+        showSettings(context, false);
-		context.startActivity(new Intent(context, CalculatorFunctionsActivity.class));
+    }
-	}
+	public static void showSettings(@NotNull final Context context, boolean detached) {
-
+        final Intent intent = new Intent(context, CalculatorPreferencesActivity.class);
-	public static void showOperators(@NotNull final Context context) {
+        addFlags(intent, detached);
-		context.startActivity(new Intent(context, CalculatorOperatorsActivity.class));
+        context.startActivity(intent);
-	}
+	}
-
+
-	public static void showVars(@NotNull final Context context) {
+    private static void addFlags(@NotNull Intent intent, boolean detached) {
-		context.startActivity(new Intent(context, CalculatorVarsActivity.class));
+        int flags = Intent.FLAG_ACTIVITY_NEW_TASK;
-	}
+
-
+        if (detached) {
-	public static void plotGraph(@NotNull final Context context, @NotNull Generic generic, @NotNull Constant constant){
+            flags = flags | Intent.FLAG_ACTIVITY_NO_HISTORY;
-		final Intent intent = new Intent();
+        }
-		intent.putExtra(ChartFactory.TITLE, context.getString(R.string.c_graph));
+
-		intent.putExtra(CalculatorPlotFragment.INPUT, new CalculatorPlotFragment.Input(generic.toString(), constant.getName()));
+        intent.setFlags(flags);
-		intent.setClass(context, CalculatorPlotActivity.class);
+
-		context.startActivity(intent);
+    }
-	}
+
-
+    public static void showAbout(@NotNull final Context context) {
-	public static void createVar(@NotNull final Context context, @NotNull CalculatorDisplay calculatorDisplay) {
+		context.startActivity(new Intent(context, CalculatorAboutActivity.class));
-        final CalculatorDisplayViewState viewState = calculatorDisplay.getViewState();
+	}
-        if (viewState.isValid() ) {
+
-			final String varValue = viewState.getText();
+	public static void showFunctions(@NotNull final Context context) {
-			if (!StringUtils.isEmpty(varValue)) {
+        showHistory(context, false);
-				if (CalculatorVarsFragment.isValidValue(varValue)) {
+    }
-                    if (context instanceof SherlockFragmentActivity) {
+
-                        VarEditDialogFragment.showDialog(VarEditDialogFragment.Input.newFromValue(varValue), ((SherlockFragmentActivity) context).getSupportFragmentManager());
+	public static void showFunctions(@NotNull final Context context, boolean detached) {
-                    } else {
+        final Intent intent = new Intent(context, CalculatorFunctionsActivity.class);
-                        final Intent intent = new Intent(context, CalculatorVarsActivity.class);
+        addFlags(intent, detached);
-                        intent.putExtra(CalculatorVarsFragment.CREATE_VAR_EXTRA_STRING, varValue);
+        context.startActivity(intent);
-                        context.startActivity(intent);
+	}
-                    }
+
-                } else {
+	public static void showOperators(@NotNull final Context context) {
-                    CalculatorLocatorImpl.getInstance().getNotifier().showMessage(R.string.c_not_valid_result, MessageType.error);
+        showOperators(context, false);
-				}
+    }
-			} else {
+
-                CalculatorLocatorImpl.getInstance().getNotifier().showMessage(R.string.c_empty_var_error, MessageType.error);
+	public static void showOperators(@NotNull final Context context, boolean detached) {
-			}
+        final Intent intent = new Intent(context, CalculatorOperatorsActivity.class);
-		} else {
+        addFlags(intent, detached);
-            CalculatorLocatorImpl.getInstance().getNotifier().showMessage(R.string.c_not_valid_result, MessageType.error);
+        context.startActivity(intent);
-		}
+	}
-	}
+
-}
+	public static void showVars(@NotNull final Context context) {
+        showVars(context, false);
+    }
+
+    public static void showVars(@NotNull final Context context, boolean detached) {
+        final Intent intent = new Intent(context, CalculatorVarsActivity.class);
+        addFlags(intent, detached);
+        context.startActivity(intent);
+	}
+
+	public static void plotGraph(@NotNull final Context context, @NotNull Generic generic, @NotNull Constant constant){
+		final Intent intent = new Intent();
+		intent.putExtra(ChartFactory.TITLE, context.getString(R.string.c_graph));
+		intent.putExtra(CalculatorPlotFragment.INPUT, new CalculatorPlotFragment.Input(generic.toString(), constant.getName()));
+		intent.setClass(context, CalculatorPlotActivity.class);
+		context.startActivity(intent);
+	}
+
+	public static void createVar(@NotNull final Context context, @NotNull CalculatorDisplay calculatorDisplay) {
+        final CalculatorDisplayViewState viewState = calculatorDisplay.getViewState();
+        if (viewState.isValid() ) {
+			final String varValue = viewState.getText();
+			if (!StringUtils.isEmpty(varValue)) {
+				if (CalculatorVarsFragment.isValidValue(varValue)) {
+                    if (context instanceof SherlockFragmentActivity) {
+                        VarEditDialogFragment.showDialog(VarEditDialogFragment.Input.newFromValue(varValue), ((SherlockFragmentActivity) context).getSupportFragmentManager());
+                    } else {
+                        final Intent intent = new Intent(context, CalculatorVarsActivity.class);
+                        intent.putExtra(CalculatorVarsFragment.CREATE_VAR_EXTRA_STRING, varValue);
+                        context.startActivity(intent);
+                    }
+                } else {
+                    CalculatorLocatorImpl.getInstance().getNotifier().showMessage(R.string.c_not_valid_result, MessageType.error);
+				}
+			} else {
+                CalculatorLocatorImpl.getInstance().getNotifier().showMessage(R.string.c_empty_var_error, MessageType.error);
+			}
+		} else {
+            CalculatorLocatorImpl.getInstance().getNotifier().showMessage(R.string.c_not_valid_result, MessageType.error);
+		}
+	}
+
+    public static void openApp(@NotNull Context context) {
+        final Intent intent = new Intent(context, CalculatorActivity.class);
+        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TOP);
+        context.startActivity(intent);
+    }
+
+    public static void likeButtonPressed(@NotNull final Context context) {
+        final Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(CalculatorApplication.FACEBOOK_APP_URL));
+        addFlags(intent, false);
+        context.startActivity(intent);
+    }
+}

calculatorpp/src/main/java/org/solovyev/android/calculator/CalculatorApplication.java

@@ -1,9 +1,6 @@
 package org.solovyev.android.calculator;
 
-import android.content.Context;
-import android.content.Intent;
 import android.content.SharedPreferences;
-import android.net.Uri;
 import android.preference.PreferenceManager;
 import net.robotmedia.billing.BillingController;
 import net.robotmedia.billing.helper.DefaultBillingObserver;
@@ -15,6 +12,7 @@ import org.jetbrains.annotations.NotNull;
 import org.solovyev.android.ads.AdsController;
 import org.solovyev.android.calculator.history.AndroidCalculatorHistory;
 import org.solovyev.android.calculator.model.AndroidCalculatorEngine;
+import org.solovyev.android.calculator.widget.CalculatorWidgetHelper;
 
 /**
  * User: serso
@@ -39,6 +37,7 @@ public class CalculatorApplication extends android.app.Application {
     **********************************************************************
     */
 
+    private static final String TAG = "Calculator++ Application";
     public static final String FACEBOOK_APP_URL = "http://www.facebook.com/calculatorpp";
 
     public static final String AD_FREE_PRODUCT_ID = "ad_free";
@@ -49,6 +48,9 @@ public class CalculatorApplication extends android.app.Application {
     @NotNull
     private static CalculatorApplication instance;
 
+    @NotNull
+    private CalculatorWidgetHelper widgetHelper;
+
     /*
     **********************************************************************
     *
@@ -91,6 +93,10 @@ public class CalculatorApplication extends android.app.Application {
 
         CalculatorLocatorImpl.getInstance().getCalculator().init();
 
+        // in order to not to be garbage collected
+        widgetHelper = new CalculatorWidgetHelper();
+        CalculatorLocatorImpl.getInstance().getCalculator().addCalculatorEventListener(widgetHelper);
+
         AdsController.getInstance().init(ADMOB_USER_ID, AD_FREE_PRODUCT_ID, new BillingController.IConfiguration() {
 
             @Override
@@ -115,6 +121,9 @@ public class CalculatorApplication extends android.app.Application {
                 AdsController.getInstance().isAdFree(CalculatorApplication.this);
             }
         }).start();
+
+        CalculatorLocatorImpl.getInstance().getLogger().debug(TAG, "Application started!");
+        CalculatorLocatorImpl.getInstance().getNotifier().showDebugMessage(TAG, "Application started!");
     }
 
     private void setTheme(@NotNull SharedPreferences preferences) {
@@ -154,7 +163,4 @@ public class CalculatorApplication extends android.app.Application {
         return instance;
     }
 
-    public static void likeButtonPressed(@NotNull final Context context) {
-        context.startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(FACEBOOK_APP_URL)));
-    }
 }

calculatorpp/src/main/java/org/solovyev/android/calculator/DigitButtonDragProcessor.java

@@ -1,37 +1,37 @@
-/*
+/*
- * Copyright (c) 2009-2011. Created by serso aka se.solovyev.
+ * Copyright (c) 2009-2011. Created by serso aka se.solovyev.
- * For more information, please, contact se.solovyev@gmail.com
+ * For more information, please, contact se.solovyev@gmail.com
- */
+ */
-
+
-package org.solovyev.android.calculator;
+package org.solovyev.android.calculator;
-
+
-import android.view.MotionEvent;
+import android.view.MotionEvent;
-import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.NotNull;
-import org.solovyev.android.view.drag.DragDirection;
+import org.solovyev.android.view.drag.DirectionDragButton;
-import org.solovyev.android.view.drag.SimpleOnDragListener;
+import org.solovyev.android.view.drag.DragButton;
-import org.solovyev.android.view.drag.DirectionDragButton;
+import org.solovyev.android.view.drag.DragDirection;
-import org.solovyev.android.view.drag.DragButton;
+import org.solovyev.android.view.drag.SimpleOnDragListener;
-import org.solovyev.common.math.Point2d;
+import org.solovyev.common.math.Point2d;
-
+
-/**
+/**
- * User: serso
+ * User: serso
- * Date: 9/16/11
+ * Date: 9/16/11
- * Time: 11:48 PM
+ * Time: 11:48 PM
- */
+ */
-public class DigitButtonDragProcessor implements SimpleOnDragListener.DragProcessor {
+public class DigitButtonDragProcessor implements SimpleOnDragListener.DragProcessor {
-
+
-    @NotNull
+    @NotNull
-    private CalculatorKeyboard calculatorKeyboard;
+    private CalculatorKeyboard calculatorKeyboard;
-
+
-    public DigitButtonDragProcessor(@NotNull CalculatorKeyboard calculatorKeyboard) {
+    public DigitButtonDragProcessor(@NotNull CalculatorKeyboard calculatorKeyboard) {
-        this.calculatorKeyboard = calculatorKeyboard;
+        this.calculatorKeyboard = calculatorKeyboard;
-    }
+    }
-
+
-	@Override
+	@Override
-	public boolean processDragEvent(@NotNull DragDirection dragDirection, @NotNull DragButton dragButton, @NotNull Point2d startPoint2d, @NotNull MotionEvent motionEvent) {
+	public boolean processDragEvent(@NotNull DragDirection dragDirection, @NotNull DragButton dragButton, @NotNull Point2d startPoint2d, @NotNull MotionEvent motionEvent) {
-		assert dragButton instanceof DirectionDragButton;
+		assert dragButton instanceof DirectionDragButton;
-        calculatorKeyboard.digitButtonPressed(((DirectionDragButton) dragButton).getText(dragDirection));
+        calculatorKeyboard.buttonPressed(((DirectionDragButton) dragButton).getText(dragDirection));
-		return true;
+		return true;
-	}
+	}
-
+
-}
+}

calculatorpp/src/main/java/org/solovyev/android/calculator/view/NumeralBaseConverterDialog.java

@@ -71,7 +71,7 @@ public class NumeralBaseConverterDialog {
                     toUnitsValue = ((CalculatorNumeralBase) toUnits.getUnitType()).getNumeralBase().getJsclPrefix() + toUnitsValue;
                 }
 
-                CalculatorLocatorImpl.getInstance().getKeyboard().digitButtonPressed(toUnitsValue);
+                CalculatorLocatorImpl.getInstance().getKeyboard().buttonPressed(toUnitsValue);
                 final AlertDialog alertDialog = alertDialogHolder.getObject();
                 if (alertDialog != null) {
                     alertDialog.dismiss();

calculatorpp/src/main/java/org/solovyev/android/calculator/widget/CalculatorWidgetConfigurationActivity.java

@@ -0,0 +1,11 @@
+package org.solovyev.android.calculator.widget;
+
+import android.app.Activity;
+
+/**
+ * User: Solovyev_S
+ * Date: 19.10.12
+ * Time: 16:20
+ */
+public class CalculatorWidgetConfigurationActivity extends Activity {
+}

calculatorpp/src/main/java/org/solovyev/android/calculator/widget/CalculatorWidgetHelper.java

@@ -0,0 +1,65 @@
+package org.solovyev.android.calculator.widget;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.solovyev.android.calculator.*;
+
+/**
+ * User: serso
+ * Date: 10/19/12
+ * Time: 11:11 PM
+ */
+public class CalculatorWidgetHelper extends BroadcastReceiver implements CalculatorEventListener {
+
+    private static final String TAG = "Calculator++ Widget Helper";
+
+    @NotNull
+    private final CalculatorEventHolder lastEvent = new CalculatorEventHolder(CalculatorUtils.createFirstEventDataId());
+
+    public CalculatorWidgetHelper() {
+        CalculatorLocatorImpl.getInstance().getCalculator().addCalculatorEventListener(this);
+    }
+
+    @Override
+    public void onCalculatorEvent(@NotNull CalculatorEventData calculatorEventData, @NotNull CalculatorEventType calculatorEventType, @Nullable Object data) {
+        final CalculatorEventHolder.Result result = lastEvent.apply(calculatorEventData);
+        if (result.isNewAfter()) {
+            switch (calculatorEventType) {
+                case editor_state_changed_light:
+                case editor_state_changed:
+                    final CalculatorEditorChangeEventData editorChangeData = (CalculatorEditorChangeEventData) data;
+                    final CalculatorEditorViewState newEditorState = editorChangeData.getNewValue();
+
+                    CalculatorLocatorImpl.getInstance().getNotifier().showDebugMessage(TAG, "Editor state changed: " + newEditorState.getText());
+
+                    CalculatorWidgetProvider.onEditorStateChanged(CalculatorApplication.getInstance(), newEditorState);
+                    break;
+
+                case display_state_changed:
+                    final CalculatorDisplayChangeEventData displayChangeData = (CalculatorDisplayChangeEventData) data;
+                    final CalculatorDisplayViewState newDisplayState = displayChangeData.getNewValue();
+
+                    CalculatorLocatorImpl.getInstance().getNotifier().showDebugMessage(TAG, "Display state changed: " + newDisplayState.getText());
+
+                    CalculatorWidgetProvider.onDisplayStateChanged(CalculatorApplication.getInstance(), newDisplayState);
+                    break;
+            }
+        }
+    }
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        if (CalculatorWidgetProvider.BUTTON_PRESSED_ACTION.equals(intent.getAction())) {
+            final int buttonId = intent.getIntExtra(CalculatorWidgetProvider.BUTTON_ID_EXTRA, 0);
+            //Toast.makeText(context, "Button id: " + buttonId, Toast.LENGTH_SHORT).show();
+
+            final WidgetButton button = WidgetButton.getById(buttonId);
+            if ( button != null ) {
+                button.onClick(context);
+            }
+        }
+    }
+}

calculatorpp/src/main/java/org/solovyev/android/calculator/widget/CalculatorWidgetProvider.java

@@ -0,0 +1,199 @@
+package org.solovyev.android.calculator.widget;
+
+import android.app.PendingIntent;
+import android.appwidget.AppWidgetManager;
+import android.appwidget.AppWidgetProvider;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.text.Html;
+import android.widget.RemoteViews;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.solovyev.android.calculator.CalculatorDisplayViewState;
+import org.solovyev.android.calculator.CalculatorEditorViewState;
+import org.solovyev.android.calculator.CalculatorLocatorImpl;
+import org.solovyev.android.calculator.R;
+
+import java.io.Serializable;
+
+/**
+ * User: Solovyev_S
+ * Date: 19.10.12
+ * Time: 16:18
+ */
+public class CalculatorWidgetProvider extends AppWidgetProvider {
+
+    /*
+    **********************************************************************
+    *
+    *                           CONSTANTS
+    *
+    **********************************************************************
+    */
+    public static final String BUTTON_ID_EXTRA = "buttonId";
+    public static final String BUTTON_PRESSED_ACTION = "org.solovyev.calculator.widget.BUTTON_PRESSED";
+
+    private static final String EDITOR_STATE_CHANGED_ACTION = "org.solovyev.calculator.widget.EDITOR_STATE_CHANGED";
+    private static final String EDITOR_STATE_EXTRA = "editorState";
+
+    private static final String DISPLAY_STATE_CHANGED_ACTION = "org.solovyev.calculator.widget.DISPLAY_STATE_CHANGED";
+    private static final String DISPLAY_STATE_EXTRA = "displayState";
+
+    private static final String TAG = "Calculator++ Widget";
+
+    /*
+    **********************************************************************
+    *
+    *                           FIELDS
+    *
+    **********************************************************************
+    */
+
+    @Nullable
+    private String cursorColor;
+
+    /*
+    **********************************************************************
+    *
+    *                           METHODS
+    *
+    **********************************************************************
+    */
+
+    @Override
+    public void onEnabled(Context context) {
+        super.onEnabled(context);
+
+        getCursorColor(context);
+    }
+
+    @NotNull
+    private String getCursorColor(@NotNull Context context) {
+        if ( cursorColor == null ) {
+            cursorColor = Integer.toHexString(context.getResources().getColor(R.color.widget_cursor_color)).substring(2);
+        }
+        return cursorColor;
+    }
+
+    @Override
+    public void onUpdate(@NotNull Context context,
+                         @NotNull AppWidgetManager appWidgetManager,
+                         @NotNull int[] appWidgetIds) {
+        super.onUpdate(context, appWidgetManager, appWidgetIds);
+
+        for (int appWidgetId : appWidgetIds) {
+            final RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_layout);
+
+            for (WidgetButton button : WidgetButton.values()) {
+                final Intent onButtonClickIntent = new Intent(context, CalculatorWidgetProvider.class);
+                onButtonClickIntent.setAction(BUTTON_PRESSED_ACTION);
+                onButtonClickIntent.putExtra(BUTTON_ID_EXTRA, button.getButtonId());
+                final PendingIntent pendingIntent = PendingIntent.getBroadcast(context, button.getButtonId(), onButtonClickIntent, PendingIntent.FLAG_UPDATE_CURRENT);
+                if (pendingIntent != null) {
+                    views.setOnClickPendingIntent(button.getButtonId(), pendingIntent);
+                }
+            }
+
+            appWidgetManager.updateAppWidget(appWidgetId, views);
+        }
+    }
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        super.onReceive(context, intent);
+
+        if (CalculatorWidgetProvider.BUTTON_PRESSED_ACTION.equals(intent.getAction())) {
+            final int buttonId = intent.getIntExtra(CalculatorWidgetProvider.BUTTON_ID_EXTRA, 0);
+
+            final WidgetButton button = WidgetButton.getById(buttonId);
+            if (button != null) {
+                button.onClick(context);
+            }
+        } else if (EDITOR_STATE_CHANGED_ACTION.equals(intent.getAction())) {
+            CalculatorLocatorImpl.getInstance().getNotifier().showDebugMessage(TAG, "Editor state changed broadcast received!");
+
+            final Serializable object = intent.getSerializableExtra(EDITOR_STATE_EXTRA);
+            if (object instanceof CalculatorEditorViewState) {
+                updateEditorState(context, (CalculatorEditorViewState) object);
+            }
+        } else if (DISPLAY_STATE_CHANGED_ACTION.equals(intent.getAction())) {
+            CalculatorLocatorImpl.getInstance().getNotifier().showDebugMessage(TAG, "Display state changed broadcast received!");
+
+            final Serializable object = intent.getSerializableExtra(DISPLAY_STATE_EXTRA);
+            if (object instanceof CalculatorDisplayViewState) {
+                updateDisplayState(context, (CalculatorDisplayViewState) object);
+            }
+        }
+    }
+
+    private void updateDisplayState(@NotNull Context context, @NotNull CalculatorDisplayViewState displayState) {
+        if (displayState.isValid()) {
+            setText(context, R.id.calculatorDisplay, displayState.getText());
+            setTextColor(context, R.id.calculatorDisplay, context.getResources().getColor(R.color.default_text_color));
+        } else {
+            setTextColor(context, R.id.calculatorDisplay, context.getResources().getColor(R.color.display_error_text_color));
+        }
+    }
+
+    private void setText(@NotNull Context context, int textViewId, @Nullable CharSequence text) {
+        final AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
+
+        final int[] appWidgetIds = appWidgetManager.getAppWidgetIds(new ComponentName(context, CalculatorWidgetProvider.class));
+        for (int appWidgetId : appWidgetIds) {
+            final RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_layout);
+            views.setTextViewText(textViewId, text);
+            appWidgetManager.updateAppWidget(appWidgetId, views);
+        }
+    }
+
+    private void setTextColor(@NotNull Context context, int textViewId, int textColor) {
+        final AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
+
+        final int[] appWidgetIds = appWidgetManager.getAppWidgetIds(new ComponentName(context, CalculatorWidgetProvider.class));
+        for (int appWidgetId : appWidgetIds) {
+            final RemoteViews views = new RemoteViews(context.getPackageName(), R.layout.widget_layout);
+            views.setTextColor(textViewId, textColor);
+            appWidgetManager.updateAppWidget(appWidgetId, views);
+        }
+    }
+
+    private void updateEditorState(@NotNull Context context, @NotNull CalculatorEditorViewState editorState) {
+        String text = editorState.getText();
+
+        CharSequence newText = text;
+        int selection = editorState.getSelection();
+        if (selection >= 0 && selection <= text.length() ) {
+            // inject cursor
+            newText = Html.fromHtml(text.substring(0, selection) + "<font color=\"#" + getCursorColor(context) + "\">|</font>" + text.substring(selection));
+        }
+        CalculatorLocatorImpl.getInstance().getNotifier().showDebugMessage(TAG, "New editor state: " + text);
+        setText(context, R.id.calculatorEditor, newText);
+    }
+
+    /*
+    **********************************************************************
+    *
+    *                           STATIC
+    *
+    **********************************************************************
+    */
+
+    public static void onEditorStateChanged(@NotNull Context context, @NotNull CalculatorEditorViewState editorViewState) {
+        final Intent intent = new Intent(EDITOR_STATE_CHANGED_ACTION);
+        intent.setClass(context, CalculatorWidgetProvider.class);
+        intent.putExtra(EDITOR_STATE_EXTRA, editorViewState);
+        context.sendBroadcast(intent);
+        CalculatorLocatorImpl.getInstance().getNotifier().showDebugMessage(TAG, "Editor state changed broadcast sent");
+    }
+
+    public static void onDisplayStateChanged(@NotNull Context context, @NotNull CalculatorDisplayViewState displayViewState) {
+        final Intent intent = new Intent(DISPLAY_STATE_CHANGED_ACTION);
+        intent.setClass(context, CalculatorWidgetProvider.class);
+        intent.putExtra(DISPLAY_STATE_EXTRA, displayViewState);
+        context.sendBroadcast(intent);
+        CalculatorLocatorImpl.getInstance().getNotifier().showDebugMessage(TAG, "Display state changed broadcast sent");
+    }
+
+
+}

calculatorpp/src/main/java/org/solovyev/android/calculator/widget/WidgetButton.java

@@ -0,0 +1,94 @@
+package org.solovyev.android.calculator.widget;
+
+import android.content.Context;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+import org.solovyev.android.calculator.CalculatorLocatorImpl;
+import org.solovyev.android.calculator.CalculatorSpecialButton;
+import org.solovyev.android.calculator.R;
+
+/**
+* User: serso
+* Date: 10/20/12
+* Time: 12:05 AM
+*/
+enum WidgetButton {
+
+    /*digits*/
+    one(R.id.oneDigitButton, "1"),
+    two(R.id.twoDigitButton, "2"),
+    three(R.id.threeDigitButton, "3"),
+    four(R.id.fourDigitButton, "4"),
+    five(R.id.fiveDigitButton, "5"),
+    six(R.id.sixDigitButton, "6"),
+    seven(R.id.sevenDigitButton, "7"),
+    eight(R.id.eightDigitButton, "8"),
+    nine(R.id.nineDigitButton, "9"),
+    zero(R.id.zeroDigitButton, "0"),
+
+    period(R.id.periodButton, "."),
+    brackets(R.id.roundBracketsButton, "()"),
+
+    settings(R.id.settingsButton, CalculatorSpecialButton.settings_detached),
+    like(R.id.likeButton, CalculatorSpecialButton.like),
+
+    /*last row*/
+    left(R.id.leftButton, CalculatorSpecialButton.cursor_left),
+    right(R.id.rightButton, CalculatorSpecialButton.cursor_right),
+    vars(R.id.varsButton, CalculatorSpecialButton.vars_detached),
+    functions(R.id.functionsButton, CalculatorSpecialButton.functions_detached),
+    app(R.id.appButton, CalculatorSpecialButton.open_app),
+    history(R.id.historyButton, CalculatorSpecialButton.history_detached),
+
+    /*operations*/
+    multiplication(R.id.multiplicationButton, "*"),
+    division(R.id.divisionButton, "/"),
+    plus(R.id.plusButton, "+"),
+    subtraction(R.id.subtractionButton, "-"),
+    percent(R.id.percentButton, "%"),
+    power(R.id.powerButton, "^"),
+
+    /*last column*/
+    clear(R.id.clearButton, CalculatorSpecialButton.clear),
+    erase(R.id.eraseButton, CalculatorSpecialButton.erase),
+    copy(R.id.copyButton, CalculatorSpecialButton.copy),
+    paste(R.id.pasteButton, CalculatorSpecialButton.paste),
+
+    /*equals*/
+    equals(R.id.equalsButton, CalculatorSpecialButton.equals);
+
+
+    private final int buttonId;
+
+    @NotNull
+    private final String text;
+
+    WidgetButton(int buttonId, @NotNull CalculatorSpecialButton button) {
+        this(buttonId, button.getActionCode());
+    }
+
+    WidgetButton(int buttonId, @NotNull String text) {
+        this.buttonId = buttonId;
+        this.text = text;
+    }
+
+    public void onClick(@NotNull Context context) {
+        CalculatorLocatorImpl.getInstance().getNotifier().showDebugMessage("Calculator++ Widget", "Button pressed: " + text);
+        CalculatorLocatorImpl.getInstance().getKeyboard().buttonPressed(text);
+    }
+
+    @Nullable
+    public static WidgetButton getById(int buttonId) {
+        for (WidgetButton widgetButton : values()) {
+            if (widgetButton.buttonId == buttonId) {
+                return widgetButton;
+            }
+        }
+
+        return null;
+    }
+
+    public int getButtonId() {
+        return buttonId;
+    }
+}