history changes

res/layout/calc_round_brackets_button.xml

@@ -8,10 +8,11 @@
 
 <org.solovyev.android.view.widgets.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/roundBracketsButton" a:text="()"
+													   a:id="@+id/roundBracketsButton"
 													   c:textUp="("
+													   a:text="()"
 													   c:textDown=")"
+													   c:textLeft="(…)"
 													   c:directionTextScale="0.5"
-
 													   style="?digitButtonStyle"
 													   a:onClick="digitButtonClickHandler"/>

res/layout/history.xml

@@ -22,22 +22,6 @@
 			  a:textColor="@color/button_operator_text_color"
 			  style="@style/history_item"/>
 
-	<LinearLayout a:orientation="horizontal"
-				  a:layout_width="fill_parent"
-				  a:layout_height="fill_parent">
-
-		<TextView a:id="@+id/history_item_comment_label"
-				  a:layout_width="wrap_content"
-				  a:layout_height="fill_parent"
-				  a:text="@string/c_history_item_comment"
-				  style="@style/history_item_label"/>
-
-		<TextView a:id="@+id/history_item_comment"
-				  a:layout_width="fill_parent"
-				  a:layout_height="fill_parent"
-				  style="@style/history_item"/>
-	</LinearLayout>
-
 	<LinearLayout a:orientation="horizontal"
 			a:layout_width="fill_parent"
 			a:layout_height="fill_parent">

res/layout/history_edit.xml

@@ -26,6 +26,8 @@
 
 		<TextView a:id="@+id/history_edit_expression"
 				  a:layout_width="fill_parent"
+				  a:padding="6dp"
+				  a:textStyle="bold"
 				  a:layout_height="wrap_content"
 				  style="@style/default_text_size">
 		</TextView>
@@ -39,6 +41,9 @@
 		<EditText a:id="@+id/history_edit_comment"
 				  a:layout_width="fill_parent"
 				  a:layout_height="wrap_content"
+				  a:minLines="4"
+				  a:maxLines="4"
+				  a:gravity="top|left"
 				  style="@style/default_text_size">
 		</EditText>
 

res/layout/saved_history.xml

@@ -0,0 +1,41 @@
+<?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:orientation="vertical"
+			  a:layout_width="fill_parent"
+			  a:layout_height="fill_parent">
+
+	<TextView a:id="@+id/history_time"
+			  a:layout_width="fill_parent"
+			  a:layout_height="fill_parent"
+			  style="@style/history_time"/>
+
+	<TextView a:id="@+id/history_item"
+			  a:layout_width="fill_parent"
+			  a:layout_height="fill_parent"
+			  a:textColor="@color/button_operator_text_color"
+			  style="@style/history_item"/>
+
+	<LinearLayout a:orientation="horizontal"
+				  a:layout_width="fill_parent"
+				  a:layout_height="fill_parent">
+
+		<TextView a:id="@+id/history_item_comment_label"
+				  a:layout_width="wrap_content"
+				  a:layout_height="fill_parent"
+				  a:text="@string/c_history_item_comment"
+				  style="@style/history_item_label"/>
+
+		<TextView a:id="@+id/history_item_comment"
+				  a:layout_width="fill_parent"
+				  a:layout_height="fill_parent"
+				  style="@style/history_item"/>
+	</LinearLayout>
+
+</LinearLayout>

res/values/strings.xml

@@ -309,7 +309,7 @@ Check the \'Round result\' preference in application settings - it should be tur
 	<string name="c_copy_expression">Copy expression</string>
 	<string name="c_copy_result">Copy result</string>
 	<string name="c_history_expression">Value</string>
-	<string name="c_history_item_already_saved">Already saved (see entries above)</string>
+	<string name="c_history_item_already_saved">Saved (see \'Saved history\' tab)</string>
 	<string name="c_history_comment">Comment</string>
 	<string name="c_save_history">Save history</string>
 	<string name="c_edit_history">Modify history</string>

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

@@ -121,28 +121,30 @@ public class CalculatorActivity extends Activity implements FontSizeAdjuster, Sh
 
 		final DragButton equalsButton = (DragButton) findViewById(R.id.equalsButton);
 		if (equalsButton != null) {
-			final OnDragListener evalOnDragListener = new OnDragListenerVibrator(newOnDragListener(new EvalDragProcessor(calculatorModel), dragPreferences), vibrator, preferences);
+			equalsButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new EvalDragProcessor(calculatorModel), dragPreferences), vibrator, preferences));
-			equalsButton.setOnDragListener(evalOnDragListener);
 		}
 
 		final AngleUnitsButton angleUnitsButton = (AngleUnitsButton) findViewById(R.id.sixDigitButton);
 		if (angleUnitsButton != null) {
-			final OnDragListener onDragListener = new OnDragListenerVibrator(newOnDragListener(new AngleUnitsChanger(), dragPreferences), vibrator, preferences);
+			angleUnitsButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new AngleUnitsChanger(), dragPreferences), vibrator, preferences));
-			angleUnitsButton.setOnDragListener(onDragListener);
 		}
 
 		final NumeralBasesButton numeralBasesButton = (NumeralBasesButton) findViewById(R.id.clearButton);
 		if (numeralBasesButton != null) {
-			final OnDragListener onDragListener = new OnDragListenerVibrator(newOnDragListener(new NumeralBasesChanger(), dragPreferences), vibrator, preferences);
+			numeralBasesButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new NumeralBasesChanger(), dragPreferences), vibrator, preferences));
-			numeralBasesButton.setOnDragListener(onDragListener);
 		}
 
 		final DragButton varsButton = (DragButton) findViewById(R.id.varsButton);
 		if (varsButton != null) {
-			final OnDragListener varsOnDragListener = new OnDragListenerVibrator(newOnDragListener(new VarsDragProcessor(), dragPreferences), vibrator, preferences);
+			varsButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new VarsDragProcessor(), dragPreferences), vibrator, preferences));
-			varsButton.setOnDragListener(varsOnDragListener);
 		}
 
+		final DragButton roundBracketsButton = (DragButton) findViewById(R.id.roundBracketsButton);
+		if ( roundBracketsButton != null ) {
+			roundBracketsButton.setOnDragListener(new OnDragListenerVibrator(newOnDragListener(new RoundBracketsDrgProcessor(), dragPreferences), vibrator, preferences));
+		}
+
+
 		CalculatorEngine.instance.reset(this, preferences);
 
 		initMultiplicationButton();
@@ -589,4 +591,28 @@ public class CalculatorActivity extends Activity implements FontSizeAdjuster, Sh
 			((Button) multiplicationButton).setText(CalculatorEngine.instance.getMultiplicationSign());
 		}
 	}
+
+	private static class RoundBracketsDrgProcessor implements SimpleOnDragListener.DragProcessor {
+		@Override
+		public boolean processDragEvent(@NotNull DragDirection dragDirection, @NotNull DragButton dragButton, @NotNull Point2d startPoint2d, @NotNull MotionEvent motionEvent) {
+			boolean result = false;
+			if ( dragDirection == DragDirection.left ) {
+				CalculatorModel.instance.doTextOperation(new CalculatorModel.TextOperation() {
+					@Override
+					public void doOperation(@NotNull EditText editor) {
+						final int cursorPosition = editor.getSelectionStart();
+						final StringBuilder text = new StringBuilder("(");
+						final String oldText = editor.getText().toString();
+						text.append(oldText.substring(0, cursorPosition));
+						text.append(")");
+						text.append(oldText.substring(cursorPosition));
+						editor.setText(text);
+						editor.setSelection(cursorPosition + 2);
+					}
+				});
+				result = true;
+			}
+			return result;
+		}
+	}
 }

src/main/java/org/solovyev/android/calculator/history/AbstractHistoryActivity.java

@@ -50,7 +50,7 @@ public abstract class AbstractHistoryActivity extends ListActivity {
 
 
 	@NotNull
-	private HistoryArrayAdapter adapter;
+	private ArrayAdapter<CalculatorHistoryState> adapter;
 
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
@@ -63,7 +63,7 @@ public abstract class AbstractHistoryActivity extends ListActivity {
 			this.finish();
 		}*/
 
-		adapter = new HistoryArrayAdapter(this, R.layout.history, R.id.history_item, new ArrayList<CalculatorHistoryState>());
+		adapter = new HistoryArrayAdapter(this, getLayoutId(), R.id.history_item, new ArrayList<CalculatorHistoryState>());
 		setListAdapter(adapter);
 
 		final ListView lv = getListView();
@@ -122,6 +122,8 @@ public abstract class AbstractHistoryActivity extends ListActivity {
 		});
 	}
 
+	protected abstract int getLayoutId();
+
 	@Override
 	protected void onResume() {
 		super.onResume();
@@ -241,18 +243,10 @@ public abstract class AbstractHistoryActivity extends ListActivity {
 		return result;
 	}
 
-	private void clearHistory() {
+	protected abstract void clearHistory();
-		final List<CalculatorHistoryState> historyStates = new ArrayList<CalculatorHistoryState>(CalculatorHistory.instance.getStates());
-		CalculatorHistory.instance.clear();
-		for (CalculatorHistoryState historyState : historyStates) {
-			adapter.remove(historyState);
-		}
 
-		if (adapter.getCount() > 0) {
+	@NotNull
-			adapter.notifyDataSetChanged();
+	protected ArrayAdapter<CalculatorHistoryState> getAdapter() {
-		} else {
+		return adapter;
-			Toast.makeText(this, R.string.c_history_is_empty, Toast.LENGTH_SHORT).show();
-			this.finish();
-		}
 	}
 }

src/main/java/org/solovyev/android/calculator/history/CalculatorHistory.java

@@ -136,8 +136,12 @@ public enum CalculatorHistory implements HistoryHelper<CalculatorHistoryState> {
 		}
 	}
 
+	public void clearSavedHistory(@NotNull Context context) {
+		this.savedHistory.clear();
+		save(context);
+	}
 
-	public void removeSavedHistory(@NotNull CalculatorHistoryState historyState, @NotNull Context context, @NotNull SharedPreferences preferences) {
+	public void removeSavedHistory(@NotNull CalculatorHistoryState historyState, @NotNull Context context) {
 		historyState.setSaved(false);
 		this.savedHistory.remove(historyState);
 		save(context);

src/main/java/org/solovyev/android/calculator/history/HistoryActivityTab.java

@@ -7,6 +7,7 @@
 package org.solovyev.android.calculator.history;
 
 import org.jetbrains.annotations.NotNull;
+import org.solovyev.android.calculator.R;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -17,9 +18,20 @@ import java.util.List;
  * Time: 7:39 PM
  */
 public class HistoryActivityTab extends AbstractHistoryActivity {
+	@Override
+	protected int getLayoutId() {
+		return R.layout.history;
+	}
+
 	@NotNull
 	@Override
 	protected List<CalculatorHistoryState> getHistoryItems() {
 		return new ArrayList<CalculatorHistoryState>(CalculatorHistory.instance.getStates());
 	}
+
+	@Override
+	protected void clearHistory() {
+		CalculatorHistory.instance.clear();
+		getAdapter().clear();
+	}
 }

src/main/java/org/solovyev/android/calculator/history/HistoryArrayAdapter.java

@@ -44,14 +44,17 @@ public class HistoryArrayAdapter extends ArrayAdapter<CalculatorHistoryState> {
 		editor.setText(AbstractHistoryActivity.getHistoryText(state));
 
 		final TextView commentView = (TextView) result.findViewById(R.id.history_item_comment);
+		if (commentView != null) {
 			final String comment = state.getComment();
 			if (!StringUtils.isEmpty(comment)) {
 				commentView.setText(comment);
 			} else {
 				commentView.setText("");
 			}
+		}
 
 		final TextView status = (TextView) result.findViewById(R.id.history_item_status);
+		if (status != null) {
 			if (state.isSaved()) {
 				status.setText(ResourceCache.instance.getCaption("c_history_item_saved"));
 			} else {
@@ -61,6 +64,7 @@ public class HistoryArrayAdapter extends ArrayAdapter<CalculatorHistoryState> {
 					status.setText(ResourceCache.instance.getCaption("c_history_item_not_saved"));
 				}
 			}
+		}
 
 		return result;
 	}

src/main/java/org/solovyev/android/calculator/history/HistoryItemMenuData.java

@@ -6,6 +6,7 @@
 
 package org.solovyev.android.calculator.history;
 
+import android.widget.ArrayAdapter;
 import org.jetbrains.annotations.NotNull;
 
 /**
@@ -16,12 +17,12 @@ import org.jetbrains.annotations.NotNull;
 public class HistoryItemMenuData {
 
 	@NotNull
-	private final HistoryArrayAdapter adapter;
+	private final ArrayAdapter<CalculatorHistoryState> adapter;
 
 	@NotNull
 	private final CalculatorHistoryState historyState;
 
-	public HistoryItemMenuData(@NotNull CalculatorHistoryState historyState, HistoryArrayAdapter adapter) {
+	public HistoryItemMenuData(@NotNull CalculatorHistoryState historyState, ArrayAdapter<CalculatorHistoryState> adapter) {
 		this.historyState = historyState;
 		this.adapter = adapter;
 	}
@@ -32,7 +33,7 @@ public class HistoryItemMenuData {
 	}
 
 	@NotNull
-	public HistoryArrayAdapter getAdapter() {
+	public ArrayAdapter<CalculatorHistoryState> getAdapter() {
 		return adapter;
 	}
 }

src/main/java/org/solovyev/android/calculator/history/HistoryItemMenuItem.java

@@ -10,7 +10,6 @@ import android.app.Activity;
 import android.app.AlertDialog;
 import android.content.Context;
 import android.content.DialogInterface;
-import android.preference.PreferenceManager;
 import android.text.ClipboardManager;
 import android.util.Log;
 import android.view.LayoutInflater;
@@ -98,7 +97,7 @@ public enum HistoryItemMenuItem implements AMenuItem<HistoryItemMenuData> {
 			final CalculatorHistoryState historyState = data.getHistoryState();
 			if (historyState.isSaved()) {
 				data.getAdapter().remove(historyState);
-				CalculatorHistory.instance.removeSavedHistory(historyState, context, PreferenceManager.getDefaultSharedPreferences(context));
+				CalculatorHistory.instance.removeSavedHistory(historyState, context);
 				Toast.makeText(context, "History item was removed!", Toast.LENGTH_LONG).show();
 				data.getAdapter().notifyDataSetChanged();
 			}

src/main/java/org/solovyev/android/calculator/history/SavedHistoryActivityTab.java

@@ -7,6 +7,7 @@
 package org.solovyev.android.calculator.history;
 
 import org.jetbrains.annotations.NotNull;
+import org.solovyev.android.calculator.R;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -17,9 +18,20 @@ import java.util.List;
  * Time: 7:40 PM
  */
 public class SavedHistoryActivityTab extends AbstractHistoryActivity {
+	@Override
+	protected int getLayoutId() {
+		return R.layout.saved_history;
+	}
+
 	@NotNull
 	@Override
 	protected List<CalculatorHistoryState> getHistoryItems() {
 		return new ArrayList<CalculatorHistoryState>(CalculatorHistory.instance.getSavedHistory());
 	}
+
+	@Override
+	protected void clearHistory() {
+		CalculatorHistory.instance.clearSavedHistory(this);
+		getAdapter().clear();
+	}
 }