New architecture

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

@@ -27,6 +27,8 @@ public interface Calculator extends CalculatorEventContainer, HistoryControl<Cal
 
     void evaluate();
 
+    void evaluate(@NotNull Long sequenceId);
+
     void simplify();
 
     @NotNull

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

@@ -165,7 +165,7 @@ public class CalculatorEngineImpl implements CalculatorEngine {
 
     @Override
     public void softReset() {
-        // do nothing
+        CalculatorLocatorImpl.getInstance().getCalculator().fireCalculatorEvent(CalculatorEventType.engine_preferences_changed, null);
     }
 
     /*

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

@@ -17,6 +17,10 @@ public enum CalculatorEventType {
     **********************************************************************
     */
 
+
+    // @NotNull CalculatorEditorViewState
+    manual_calculation_requested,
+
     // @NotNull org.solovyev.android.calculator.CalculatorInput
     calculation_started,
 
@@ -54,7 +58,17 @@ public enum CalculatorEventType {
     editor_state_changed,
 
     // @NotNull CalculatorDisplayChangeEventData
-    display_state_changed;
+    display_state_changed,
+
+    /*
+    **********************************************************************
+    *
+    *                           ENGINE
+    *
+    **********************************************************************
+    */
+
+    engine_preferences_changed;
 
     public boolean isOfType(@NotNull CalculatorEventType... types) {
         for (CalculatorEventType type : types) {

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

@@ -96,12 +96,23 @@ public class CalculatorImpl implements Calculator, CalculatorEventListener {
 
     @Override
     public void evaluate() {
-        this.evaluate(JsclOperation.numeric, getEditor().getViewState().getText());
+        final CalculatorEditorViewState viewState = getEditor().getViewState();
+        fireCalculatorEvent(CalculatorEventType.manual_calculation_requested, viewState);
+        this.evaluate(JsclOperation.numeric, viewState.getText());
+    }
+
+    @Override
+    public void evaluate(@NotNull Long sequenceId) {
+        final CalculatorEditorViewState viewState = getEditor().getViewState();
+        fireCalculatorEvent(CalculatorEventType.manual_calculation_requested, viewState, sequenceId);
+        this.evaluate(JsclOperation.numeric, viewState.getText(), sequenceId);
     }
 
     @Override
     public void simplify() {
-        this.evaluate(JsclOperation.simplify, getEditor().getViewState().getText());
+        final CalculatorEditorViewState viewState = getEditor().getViewState();
+        fireCalculatorEvent(CalculatorEventType.manual_calculation_requested, viewState);
+        this.evaluate(JsclOperation.simplify, viewState.getText());
     }
 
     @NotNull
@@ -335,7 +346,9 @@ public class CalculatorImpl implements Calculator, CalculatorEventListener {
 
     @Override
     public void onCalculatorEvent(@NotNull CalculatorEventData calculatorEventData, @NotNull CalculatorEventType calculatorEventType, @Nullable Object data) {
-        if (calculatorEventType == CalculatorEventType.editor_state_changed) {
+
+        switch (calculatorEventType) {
+            case editor_state_changed:
                 final CalculatorEditorChangeEventData changeEventData = (CalculatorEditorChangeEventData) data;
 
                 final String newText = changeEventData.getNewState().getText();
@@ -344,6 +357,10 @@ public class CalculatorImpl implements Calculator, CalculatorEventListener {
                 if (!newText.equals(oldText)) {
                     evaluate(JsclOperation.numeric, changeEventData.getNewState().getText(), calculatorEventData.getSequenceId());
                 }
+                break;
+            case engine_preferences_changed:
+                evaluate(calculatorEventData.getSequenceId());
+                break;
         }
     }
 

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

@@ -14,6 +14,7 @@ import java.util.concurrent.atomic.AtomicInteger;
 
 import static org.solovyev.android.calculator.CalculatorEventType.display_state_changed;
 import static org.solovyev.android.calculator.CalculatorEventType.editor_state_changed;
+import static org.solovyev.android.calculator.CalculatorEventType.manual_calculation_requested;
 
 /**
  * User: Solovyev_S
@@ -179,7 +180,7 @@ public class CalculatorHistoryImpl implements CalculatorHistory {
     public void onCalculatorEvent(@NotNull CalculatorEventData calculatorEventData,
                                   @NotNull CalculatorEventType calculatorEventType,
                                   @Nullable Object data) {
-        if (calculatorEventType.isOfType(editor_state_changed, display_state_changed)) {
+        if (calculatorEventType.isOfType(editor_state_changed, display_state_changed, manual_calculation_requested)) {
 
             if (calculatorEventData.isAfter(this.lastEventDataId)) {
                 final boolean sameSequence = calculatorEventData.isSameSequence(this.lastEventDataId);
@@ -188,6 +189,9 @@ public class CalculatorHistoryImpl implements CalculatorHistory {
                     this.lastEventDataId = calculatorEventData;
 
                     switch (calculatorEventType) {
+                        case manual_calculation_requested:
+                            lastEditorViewState = (CalculatorEditorViewState) data;
+                            break;
                         case editor_state_changed:
                             final CalculatorEditorChangeEventData editorChangeData = (CalculatorEditorChangeEventData) data;
                             lastEditorViewState = editorChangeData.getNewState();

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

@@ -118,6 +118,11 @@ public class AndroidCalculator implements Calculator {
         calculator.evaluate();
     }
 
+    @Override
+    public void evaluate(@NotNull Long sequenceId) {
+        calculator.evaluate(sequenceId);
+    }
+
     @Override
     public void simplify() {
         calculator.simplify();

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

@@ -186,9 +186,6 @@ public class CalculatorActivity extends Activity implements FontSizeAdjuster, Sh
 			roundBracketsButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new RoundBracketsDragProcessor(), dragPreferences), vibrator, preferences));
 		}
 
-
-        getEngine().softReset();
-
 		initMultiplicationButton();
 
         fixThemeParameters(true);

calculatorpp/src/main/java/org/solovyev/android/calculator/model/AndroidCalculatorEngine.java

@@ -39,7 +39,7 @@ import java.util.List;
  * Time: 11:38 PM
  */
 
-public class AndroidCalculatorEngine implements CalculatorEngine {
+public class AndroidCalculatorEngine implements CalculatorEngine, SharedPreferences.OnSharedPreferenceChangeListener {
 
     private static final String GROUPING_SEPARATOR_P_KEY = "org.solovyev.android.calculator.CalculatorActivity_calc_grouping_separator";
 
@@ -104,6 +104,9 @@ public class AndroidCalculatorEngine implements CalculatorEngine {
 
     public AndroidCalculatorEngine(@NotNull Application application) {
         this.context = application;
+
+        PreferenceManager.getDefaultSharedPreferences(application).registerOnSharedPreferenceChangeListener(this);
+
         this.lock = new Object();
 
         final JsclMathEngine engine = JsclMathEngine.instance;
@@ -274,4 +277,12 @@ public class AndroidCalculatorEngine implements CalculatorEngine {
         return calculatorEngine.getMultiplicationSign();
     }
 
+
+    @Override
+    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
+        if ( Preferences.getPreferenceKeys().contains(key) ) {
+            this.softReset();
+        }
+    }
+
 }