Buttons changes

Special glyphs in the built-in font were introduced
to be used instead of images

app/build.gradle

@@ -34,7 +34,6 @@ android {
         versionCode 148
         versionName '2.2.1'
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
-        generatedDensities = []
     }
     buildTypes {
         release {
@@ -58,10 +57,6 @@ android {
         sourceCompatibility JavaVersion.VERSION_1_7
         targetCompatibility JavaVersion.VERSION_1_7
     }
-    // This is handled for you by the 2.0+ Gradle Plugin
-    aaptOptions {
-        additionalParameters "--no-version-vectors"
-    }
 }
 
 dependencies {

app/src/main/java/org/solovyev/android/calculator/Keyboard.java

@@ -25,11 +25,15 @@ package org.solovyev.android.calculator;
 import android.content.SharedPreferences;
 import android.support.annotation.NonNull;
 import android.text.TextUtils;
+import android.util.Log;
 import com.squareup.otto.Bus;
 import dagger.Lazy;
+import jscl.math.Expression;
+import jscl.math.Generic;
 import org.solovyev.android.Check;
 import org.solovyev.android.calculator.buttons.CppSpecialButton;
 import org.solovyev.android.calculator.ga.Ga;
+import org.solovyev.android.calculator.history.History;
 import org.solovyev.android.calculator.math.MathType;
 import org.solovyev.android.calculator.memory.Memory;
 
@@ -43,16 +47,14 @@ public class Keyboard implements SharedPreferences.OnSharedPreferenceChangeListe
 
     @Nonnull
     private final MathType.Result mathType = new MathType.Result();
-    @Nonnull
-    private static final String GLYPH_PASTE = "\uE000";
-    @Nonnull
-    private static final String GLYPH_COPY = "\uE001";
 
     @Inject
     Editor editor;
     @Inject
     Display display;
     @Inject
+    History history;
+    @Inject
     Lazy<Memory> memory;
     @Inject
     Calculator calculator;
@@ -83,10 +85,14 @@ public class Keyboard implements SharedPreferences.OnSharedPreferenceChangeListe
             return false;
         }
 
-        if (text.equals(GLYPH_COPY)) {
+        if (text.length() == 1) {
-            text = CppSpecialButton.copy.action;
+            final char glyph = text.charAt(0);
-        } else if (text.equals(GLYPH_PASTE)) {
+            final CppSpecialButton button = CppSpecialButton.getByGlyph(glyph);
-            text = CppSpecialButton.paste.action;
+            if (button != null) {
+                ga.onButtonPressed(button.action);
+                handleSpecialAction(button);
+                return true;
+            }
         }
 
         ga.onButtonPressed(text);
@@ -138,15 +144,21 @@ public class Keyboard implements SharedPreferences.OnSharedPreferenceChangeListe
         if (button == null) {
             return false;
         }
-        onSpecialButtonPressed(button);
+        handleSpecialAction(button);
         return true;
     }
 
-    private void onSpecialButtonPressed(@NonNull CppSpecialButton button) {
+    private void handleSpecialAction(@NonNull CppSpecialButton button) {
         switch (button) {
             case history:
                 launcher.showHistory();
                 break;
+            case history_undo:
+                history.undo();
+                break;
+            case history_redo:
+                history.redo();
+                break;
             case cursor_right:
                 editor.moveCursorRight();
                 break;
@@ -171,6 +183,15 @@ public class Keyboard implements SharedPreferences.OnSharedPreferenceChangeListe
             case memory:
                 memory.get().requestValue();
                 break;
+            case memory_plus:
+                handleMemoryButton(true);
+                break;
+            case memory_minus:
+                handleMemoryButton(false);
+                break;
+            case memory_clear:
+                memory.get().clear();
+                break;
             case erase:
                 editor.erase();
                 break;
@@ -183,6 +204,9 @@ public class Keyboard implements SharedPreferences.OnSharedPreferenceChangeListe
             case copy:
                 bus.get().post(new Display.CopyOperation());
                 break;
+            case brackets_wrap:
+                handleBracketsWrap();
+                break;
             case equals:
                 equalsButtonPressed();
                 break;
@@ -192,6 +216,15 @@ public class Keyboard implements SharedPreferences.OnSharedPreferenceChangeListe
             case functions:
                 launcher.showFunctions();
                 break;
+            case function_add:
+                launcher.showFunctionEditor();
+                break;
+            case var_add:
+                launcher.showConstantEditor();
+                break;
+            case plot_add:
+                launcher.plotDisplayedExpression();
+                break;
             case open_app:
                 launcher.openApp();
                 break;
@@ -201,6 +234,9 @@ public class Keyboard implements SharedPreferences.OnSharedPreferenceChangeListe
             case operators:
                 launcher.showOperators();
                 break;
+            case simplify:
+                calculator.simplify();
+                break;
             default:
                 Check.shouldNotHappen();
         }
@@ -220,15 +256,38 @@ public class Keyboard implements SharedPreferences.OnSharedPreferenceChangeListe
         editor.setText(state.text);
     }
 
-    public void roundBracketsButtonPressed() {
+    public void handleBracketsWrap() {
-        EditorState viewState = editor.getState();
+        final EditorState state = editor.getState();
-
+        final int cursorPosition = state.selection;
-        final int cursorPosition = viewState.selection;
+        final CharSequence oldText = state.text;
-        final CharSequence oldText = viewState.text;
-
         editor.setText("(" + oldText.subSequence(0, cursorPosition) + ")" + oldText.subSequence(cursorPosition, oldText.length()), cursorPosition + 2);
     }
 
+    private boolean handleMemoryButton(boolean plus) {
+        final DisplayState state = display.getState();
+        if (!state.valid) {
+            return false;
+        }
+        Generic value = state.getResult();
+        if (value == null) {
+            try {
+                value = Expression.valueOf(state.text);
+            } catch (jscl.text.ParseException e) {
+                Log.w(App.TAG, e.getMessage(), e);
+            }
+        }
+        if (value == null) {
+            memory.get().requestShow();
+            return false;
+        }
+        if (plus) {
+            memory.get().add(value);
+        } else {
+            memory.get().subtract(value);
+        }
+        return true;
+    }
+
     @Override
     public void onSharedPreferenceChanged(SharedPreferences preferences, String key) {
         if (Preferences.Gui.vibrateOnKeypress.isSameKey(key)) {

app/src/main/java/org/solovyev/android/calculator/buttons/CppButton.java

@@ -51,6 +51,7 @@ public enum CppButton {
     period(R.id.cpp_button_period, "."),
     brackets(R.id.cpp_button_round_brackets, "()"),
 
+    memory(R.id.cpp_button_memory, CppSpecialButton.memory),
     settings(R.id.cpp_button_settings, CppSpecialButton.settings),
     settings_widget(R.id.cpp_button_settings_widget, CppSpecialButton.settings_widget),
     like(R.id.cpp_button_like, CppSpecialButton.like),
@@ -65,7 +66,7 @@ public enum CppButton {
     history(R.id.cpp_button_history, CppSpecialButton.history),
 
     /*operations*/
-    multiplication(R.id.cpp_button_multiplication, "*"),
+    multiplication(R.id.cpp_button_multiplication, "×"),
     division(R.id.cpp_button_division, "/"),
     plus(R.id.cpp_button_plus, "+"),
     subtraction(R.id.cpp_button_subtraction, "−"),

app/src/main/java/org/solovyev/android/calculator/buttons/CppSpecialButton.java

@@ -29,9 +29,12 @@ import javax.annotation.Nullable;
 import java.util.HashMap;
 import java.util.Map;
 
+// see values/text_glyphs.xml for glyph constants
 public enum CppSpecialButton {
 
     history("history"),
+    history_undo("↶", '\ue007'),
+    history_redo("↷", '\ue008'),
     cursor_right("▷"),
     cursor_to_end(">>"),
     cursor_left("◁"),
@@ -40,39 +43,85 @@ public enum CppSpecialButton {
     settings_widget("settings_widget"),
     like("like"),
     memory("memory"),
+    memory_plus("M+"),
+    memory_minus("M-"),
+    memory_clear("MC"),
     erase("erase"),
-    paste("paste"),
+    paste("paste", '\uE000'),
-    copy("copy"),
+    copy("copy", '\uE001'),
+    brackets_wrap("(…)"),
     equals("="),
     clear("clear"),
     functions("functions"),
+    function_add("+ƒ"),
+    var_add("+π"),
+    plot_add("+plot", '\uE009'),
     open_app("open_app"),
     vars("vars"),
-    operators("operators");
+    operators("operators"),
+    simplify("≡");
 
     @Nonnull
-    private static Map<String, CppSpecialButton> buttonsByActions = new HashMap<>();
+    private static final Map<String, CppSpecialButton> buttonsByActions = new HashMap<>();
+    @Nonnull
+    private static final CppSpecialButton[] buttonsByGlyphs = new CppSpecialButton[values().length];
+    private static final char FIRST_GLYPH = '\uE000';
 
     @Nonnull
     public final String action;
+    public final char glyph;
 
     CppSpecialButton(@Nonnull String action) {
+        this(action, (char) 0);
+    }
+
+    CppSpecialButton(@Nonnull String action, char glyph) {
         this.action = action;
+        this.glyph = glyph;
     }
 
     @Nullable
     public static CppSpecialButton getByAction(@Nonnull String action) {
-        initButtonsByActionsMap();
+        initButtonsByActions();
         return buttonsByActions.get(action);
     }
 
-    private static void initButtonsByActionsMap() {
+    private static void initButtonsByActions() {
         Check.isMainThread();
         if (!buttonsByActions.isEmpty()) {
             return;
         }
-        for (CppSpecialButton specialButton : values()) {
+        for (CppSpecialButton button : values()) {
-            buttonsByActions.put(specialButton.action, specialButton);
+            buttonsByActions.put(button.action, button);
+        }
+    }
+
+    @Nullable
+    public static CppSpecialButton getByGlyph(char glyph) {
+        initButtonsByGlyphs();
+        final int position = glyphToPosition(glyph);
+        if (position < 0 || position >= buttonsByGlyphs.length) {
+            return null;
+        }
+        return buttonsByGlyphs[position];
+    }
+
+    private static int glyphToPosition(char glyph) {
+        return glyph - FIRST_GLYPH;
+    }
+
+    private static void initButtonsByGlyphs() {
+        Check.isMainThread();
+        if (buttonsByGlyphs[0] != null) {
+            return;
+        }
+        for (CppSpecialButton button : values()) {
+            if(button.glyph == 0) {
+                continue;
+            }
+            final int position = glyphToPosition(button.glyph);
+            Check.isNull(buttonsByGlyphs[position], "Glyph is already taken, glyph=" + button.glyph);
+            buttonsByGlyphs[position] = button;
         }
     }
 

app/src/main/java/org/solovyev/android/calculator/keyboard/BaseKeyboardUi.java

@@ -7,14 +7,16 @@ import android.content.SharedPreferences;
 import android.graphics.Typeface;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
+import android.text.TextUtils;
 import android.util.DisplayMetrics;
 import android.util.TypedValue;
 import android.view.View;
 import android.widget.ImageView;
 import android.widget.TextView;
 import dagger.Lazy;
+import org.solovyev.android.Check;
 import org.solovyev.android.calculator.*;
-import org.solovyev.android.calculator.buttons.CppSpecialButton;
+import org.solovyev.android.calculator.buttons.CppButton;
 import org.solovyev.android.calculator.memory.Memory;
 import org.solovyev.android.views.Adjuster;
 import org.solovyev.android.views.dragbutton.*;
@@ -68,7 +70,15 @@ public abstract class BaseKeyboardUi implements SharedPreferences.OnSharedPrefer
                 if (!Drag.hasDirectionText(view, direction)) {
                     return false;
                 }
-                return BaseKeyboardUi.this.onDrag(view, direction, ((DirectionDragView) view).getText(direction).getValue());
+                final DirectionDragView dragView = (DirectionDragView) view;
+                final String text = dragView.getText(direction).getValue();
+                if (TextUtils.isEmpty(text)) {
+                    // hasDirectionText should return false for empty text
+                    Check.shouldNotHappen();
+                    return false;
+                }
+                keyboard.buttonPressed(text);
+                return true;
             }
         };
         textScale = getTextScale(application);
@@ -85,7 +95,15 @@ public abstract class BaseKeyboardUi implements SharedPreferences.OnSharedPrefer
         }
     }
 
-    protected abstract boolean onDrag(@NonNull View view, @NonNull DragDirection direction, @Nonnull String value);
+    @Override
+    public void onClick(View v) {
+        final CppButton button = CppButton.getById(v.getId());
+        if (button == null) {
+            Check.shouldNotHappen();
+            return;
+        }
+        onClick(v, button.action);
+    }
 
     public void onCreateView(@Nonnull Activity activity, @Nonnull View view) {
         cast(activity.getApplication()).getComponent().inject(this);
@@ -197,10 +215,6 @@ public abstract class BaseKeyboardUi implements SharedPreferences.OnSharedPrefer
         v.performHapticFeedback(KEYBOARD_TAP, FLAG_IGNORE_GLOBAL_SETTING | FLAG_IGNORE_VIEW_SETTING);
     }
 
-    protected final void onClick(@Nonnull View v, @Nonnull CppSpecialButton b) {
-        onClick(v, b.action);
-    }
-
     private static class AdjusterHelper implements Adjuster.Helper<DirectionDragImageButton> {
 
         public static AdjusterHelper instance = new AdjusterHelper();

app/src/main/java/org/solovyev/android/calculator/keyboard/KeyboardUi.java

@@ -3,31 +3,23 @@ package org.solovyev.android.calculator.keyboard;
 import android.app.Activity;
 import android.app.Application;
 import android.content.SharedPreferences;
-import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
-import android.util.Log;
 import android.view.View;
-import android.widget.Button;
 import android.widget.ImageButton;
 import butterknife.Bind;
 import butterknife.ButterKnife;
 import jscl.NumeralBase;
-import jscl.math.Expression;
+import org.solovyev.android.calculator.Display;
-import jscl.math.Generic;
+import org.solovyev.android.calculator.Engine;
-import org.solovyev.android.calculator.*;
+import org.solovyev.android.calculator.R;
-import org.solovyev.android.calculator.buttons.CppSpecialButton;
-import org.solovyev.android.calculator.history.History;
-import org.solovyev.android.calculator.view.AngleUnitsButton;
-import org.solovyev.android.calculator.view.NumeralBasesButton;
 import org.solovyev.android.views.dragbutton.DirectionDragButton;
 import org.solovyev.android.views.dragbutton.DirectionDragImageButton;
-import org.solovyev.android.views.dragbutton.DirectionDragView;
-import org.solovyev.android.views.dragbutton.DragDirection;
 
 import javax.annotation.Nonnull;
 import javax.inject.Inject;
 
-import static org.solovyev.android.calculator.Engine.Preferences.*;
+import static org.solovyev.android.calculator.Engine.Preferences.multiplicationSign;
+import static org.solovyev.android.calculator.Engine.Preferences.numeralBase;
 import static org.solovyev.android.views.dragbutton.DragDirection.*;
 
 public class KeyboardUi extends BaseKeyboardUi {
@@ -53,10 +45,6 @@ public class KeyboardUi extends BaseKeyboardUi {
     @Bind(R.id.cpp_button_9)
     public DirectionDragButton button9;
     @Inject
-    History history;
-    @Inject
-    ActivityLauncher launcher;
-    @Inject
     Engine engine;
     @Inject
     Display display;
@@ -85,10 +73,10 @@ public class KeyboardUi extends BaseKeyboardUi {
     DirectionDragButton bracketsButton;
     @Nullable
     @Bind(R.id.cpp_button_copy)
-    NumeralBasesButton copyButton;
+    DirectionDragImageButton copyButton;
     @Nullable
     @Bind(R.id.cpp_button_paste)
-    AngleUnitsButton pasteButton;
+    DirectionDragImageButton pasteButton;
     @Nullable
     @Bind(R.id.cpp_button_like)
     ImageButton likeButton;
@@ -146,11 +134,9 @@ public class KeyboardUi extends BaseKeyboardUi {
 
         if (copyButton != null) {
             prepareButton(copyButton);
-            copyButton.setNumeralBase(numeralBase.getPreference(preferences));
         }
         if (pasteButton != null) {
             prepareButton(pasteButton);
-            pasteButton.setAngleUnit(angleUnit.getPreference(preferences));
         }
         prepareButton(likeButton);
         prepareButton(memoryButton);
@@ -182,133 +168,11 @@ public class KeyboardUi extends BaseKeyboardUi {
     @Override
     public void onSharedPreferenceChanged(SharedPreferences preferences, String key) {
         super.onSharedPreferenceChanged(preferences, key);
-        if (angleUnit.isSameKey(key) && pasteButton != null) {
-            pasteButton.setAngleUnit(angleUnit.getPreference(preferences));
-        }
         if (numeralBase.isSameKey(key)) {
             toggleNumericDigits();
-            if (copyButton != null) {
-                copyButton.setNumeralBase(numeralBase.getPreference(preferences));
-            }
         }
         if (multiplicationSign.isSameKey(key)) {
             multiplicationButton.setText(multiplicationSign.getPreference(preferences));
         }
     }
-
-    @Override
-    public void onClick(View v) {
-        switch (v.getId()) {
-            case R.id.cpp_button_0:
-            case R.id.cpp_button_1:
-            case R.id.cpp_button_2:
-            case R.id.cpp_button_3:
-            case R.id.cpp_button_4:
-            case R.id.cpp_button_5:
-            case R.id.cpp_button_6:
-            case R.id.cpp_button_7:
-            case R.id.cpp_button_8:
-            case R.id.cpp_button_9:
-            case R.id.cpp_button_division:
-            case R.id.cpp_button_period:
-            case R.id.cpp_button_percent:
-            case R.id.cpp_button_subtraction:
-            case R.id.cpp_button_multiplication:
-            case R.id.cpp_button_plus:
-            case R.id.cpp_button_round_brackets:
-                onClick(v, ((Button) v).getText().toString());
-                break;
-            case R.id.cpp_button_functions:
-                onClick(v, CppSpecialButton.functions);
-                break;
-            case R.id.cpp_button_history:
-                onClick(v, CppSpecialButton.history);
-                break;
-            case R.id.cpp_button_paste:
-                onClick(v, CppSpecialButton.paste);
-                break;
-            case R.id.cpp_button_copy:
-                onClick(v, CppSpecialButton.copy);
-                break;
-            case R.id.cpp_button_like:
-                onClick(v, CppSpecialButton.like);
-                break;
-            case R.id.cpp_button_memory:
-                onClick(v, CppSpecialButton.memory);
-                break;
-            case R.id.cpp_button_operators:
-                onClick(v, CppSpecialButton.operators);
-                break;
-            case R.id.cpp_button_vars:
-                onClick(v, CppSpecialButton.vars);
-                break;
-        }
-    }
-
-    @Override
-    protected boolean onDrag(@NonNull View view, @NonNull DragDirection direction, @Nonnull String value) {
-        switch (view.getId()) {
-            case R.id.cpp_button_functions:
-                if (direction == up) {
-                    launcher.showFunctionEditor();
-                    return true;
-                } else if (direction == down) {
-                    launcher.showConstantEditor();
-                    return true;
-                }
-                return false;
-            case R.id.cpp_button_history:
-                if (direction == up) {
-                    history.undo();
-                    return true;
-                } else if (direction == down) {
-                    history.redo();
-                    return true;
-                }
-                return false;
-            case R.id.cpp_button_memory:
-                return processMemoryButton(direction);
-            case R.id.cpp_button_round_brackets:
-                if (direction == left) {
-                    keyboard.roundBracketsButtonPressed();
-                    return true;
-                }
-                return processDefault(direction, (DirectionDragView) view);
-            default:
-                return processDefault(direction, (DirectionDragView) view);
-        }
-    }
-
-    private boolean processMemoryButton(@NonNull DragDirection direction) {
-        final DisplayState state = display.getState();
-        if (!state.valid) {
-            return false;
-        }
-        Generic value = state.getResult();
-        if (value == null) {
-            try {
-                value = Expression.valueOf(state.text);
-            } catch (jscl.text.ParseException e) {
-                Log.w(App.TAG, e.getMessage(), e);
-            }
-        }
-        if (value == null) {
-            memory.get().requestShow();
-            return false;
-        }
-        switch (direction) {
-            case up:
-                memory.get().add(value);
-                return true;
-            case down:
-                memory.get().subtract(value);
-                return true;
-        }
-        return false;
-    }
-
-    private boolean processDefault(@Nonnull DragDirection direction, @Nonnull DirectionDragView button) {
-        final String text = button.getText(direction).getValue();
-        return keyboard.buttonPressed(text);
-    }
 }

app/src/main/java/org/solovyev/android/calculator/keyboard/PartialKeyboardUi.java

@@ -10,18 +10,15 @@ import android.widget.ImageButton;
 import butterknife.Bind;
 import butterknife.ButterKnife;
 import org.solovyev.android.calculator.R;
-import org.solovyev.android.calculator.buttons.CppSpecialButton;
 import org.solovyev.android.calculator.view.EditorLongClickEraser;
 import org.solovyev.android.views.dragbutton.DirectionDragButton;
 import org.solovyev.android.views.dragbutton.DirectionDragImageButton;
-import org.solovyev.android.views.dragbutton.DragDirection;
 
 import javax.annotation.Nonnull;
 import javax.inject.Inject;
 
 import static org.solovyev.android.calculator.Preferences.Gui.vibrateOnKeypress;
 import static org.solovyev.android.views.dragbutton.DragDirection.down;
-import static org.solovyev.android.views.dragbutton.DragDirection.up;
 
 public class PartialKeyboardUi extends BaseKeyboardUi {
 
@@ -73,52 +70,4 @@ public class PartialKeyboardUi extends BaseKeyboardUi {
             longClickEraser.setVibrateOnKeypress(vibrateOnKeypress.getPreference(preferences));
         }
     }
-
-    @Override
-    protected boolean onDrag(@NonNull View view, @NonNull DragDirection direction, @Nonnull String value) {
-        switch (view.getId()) {
-            case R.id.cpp_button_right:
-            case R.id.cpp_button_left:
-                keyboard.buttonPressed(value);
-                return true;
-            case R.id.cpp_button_clear:
-                if(direction == up) {
-                    memory.get().clear();
-                    return true;
-                }
-                return false;
-            case R.id.cpp_button_equals:
-                if (direction == down) {
-                    launcher.plotDisplayedExpression();
-                    return true;
-                } else if (direction == up) {
-                    calculator.simplify();
-                    return true;
-                }
-
-                return false;
-        }
-        return false;
-    }
-
-    @Override
-    public void onClick(View v) {
-        switch (v.getId()) {
-            case R.id.cpp_button_left:
-                onClick(v, CppSpecialButton.cursor_left);
-                break;
-            case R.id.cpp_button_right:
-                onClick(v, CppSpecialButton.cursor_right);
-                break;
-            case R.id.cpp_button_clear:
-                onClick(v, CppSpecialButton.clear);
-                break;
-            case R.id.cpp_button_erase:
-                onClick(v, CppSpecialButton.erase);
-                break;
-            case R.id.cpp_button_equals:
-                onClick(v, CppSpecialButton.equals);
-                break;
-        }
-    }
 }

app/src/main/java/org/solovyev/android/calculator/view/AngleUnitsButton.java

@@ -1,68 +0,0 @@
-/*
- * Copyright 2013 serso aka se.solovyev
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- * Contact details
- *
- * Email: se.solovyev@gmail.com
- * Site:  http://se.solovyev.org
- */
-
-package org.solovyev.android.calculator.view;
-
-import android.content.Context;
-import android.support.v4.content.ContextCompat;
-import android.util.AttributeSet;
-import jscl.AngleUnit;
-import org.solovyev.android.calculator.R;
-import org.solovyev.android.views.dragbutton.DirectionDragImageButton;
-import org.solovyev.android.views.dragbutton.DirectionTextView;
-import org.solovyev.android.views.dragbutton.DragDirection;
-
-import javax.annotation.Nonnull;
-
-public class AngleUnitsButton extends DirectionDragImageButton {
-
-    @Nonnull
-    private AngleUnit angleUnit = AngleUnit.deg;
-
-    public AngleUnitsButton(Context context, @Nonnull AttributeSet attrs) {
-        super(context, attrs);
-        updateDirectionColors();
-    }
-
-    boolean isCurrentAngleUnits(@Nonnull String directionText) {
-        return angleUnit.name().equals(directionText);
-    }
-
-    public void setAngleUnit(@Nonnull AngleUnit angleUnit) {
-        if (this.angleUnit == angleUnit) {
-            return;
-        }
-        this.angleUnit = angleUnit;
-        updateDirectionColors();
-    }
-
-    private void updateDirectionColors() {
-        for (DragDirection direction : DragDirection.values()) {
-            final DirectionTextView.Text text = getText(direction);
-            if (isCurrentAngleUnits(text.getValue())) {
-                text.setColor(ContextCompat.getColor(getContext(), R.color.yellow_100), 1f);
-            } else {
-                text.setColor(ContextCompat.getColor(getContext(), R.color.cpp_text), DirectionTextView.DEF_ALPHA);
-            }
-        }
-    }
-}

app/src/main/java/org/solovyev/android/calculator/view/NumeralBasesButton.java

@@ -1,68 +0,0 @@
-/*
- * Copyright 2013 serso aka se.solovyev
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
- * Contact details
- *
- * Email: se.solovyev@gmail.com
- * Site:  http://se.solovyev.org
- */
-
-package org.solovyev.android.calculator.view;
-
-import android.content.Context;
-import android.support.v4.content.ContextCompat;
-import android.util.AttributeSet;
-import jscl.NumeralBase;
-import org.solovyev.android.calculator.R;
-import org.solovyev.android.views.dragbutton.DirectionDragImageButton;
-import org.solovyev.android.views.dragbutton.DirectionTextView;
-import org.solovyev.android.views.dragbutton.DragDirection;
-
-import javax.annotation.Nonnull;
-
-public class NumeralBasesButton extends DirectionDragImageButton {
-
-    @Nonnull
-    private NumeralBase numeralBase = NumeralBase.dec;
-
-    public NumeralBasesButton(Context context, @Nonnull AttributeSet attrs) {
-        super(context, attrs);
-        updateDirectionColors();
-    }
-
-    boolean isCurrentNumberBase(@Nonnull String directionText) {
-        return numeralBase.name().equals(directionText);
-    }
-
-    public void setNumeralBase(@Nonnull NumeralBase numeralBase) {
-        if (this.numeralBase == numeralBase) {
-            return;
-        }
-        this.numeralBase = numeralBase;
-        updateDirectionColors();
-    }
-
-    private void updateDirectionColors() {
-        for (DragDirection direction : DragDirection.values()) {
-            final DirectionTextView.Text text = getText(direction);
-            if (isCurrentNumberBase(text.getValue())) {
-                text.setColor(ContextCompat.getColor(getContext(), R.color.yellow_100), 1f);
-            } else {
-                text.setColor(ContextCompat.getColor(getContext(), R.color.cpp_text), DirectionTextView.DEF_ALPHA);
-            }
-        }
-    }
-}

app/src/main/java/org/solovyev/android/views/dragbutton/DragView.java

@@ -3,6 +3,7 @@ package org.solovyev.android.views.dragbutton;
 import android.support.annotation.Nullable;
 
 public interface DragView {
+    int getId();
     void setOnDragListener(@Nullable DragListener listener);
     void setVibrateOnDrag(boolean vibrateOnDrag);
 }

app/src/main/res/drawable/ic_chevron_left_white_24dp.xml

@@ -1,9 +1,9 @@
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
     android:width="24dp"
     android:height="24dp"
-        android:viewportWidth="24.0"
+    android:viewportHeight="24.0"
-        android:viewportHeight="24.0">
+    android:viewportWidth="24.0">
     <path
         android:fillColor="#ffffff"
-        android:pathData="M15.41,7.41L14,6l-6,6 6,6 1.41,-1.41L10.83,12z"/>
+        android:pathData="M15.41,7.41L14,6l-6,6 6,6 1.41,-1.41L10.83,12z" />
 </vector>

app/src/main/res/drawable/ic_favorite_border_white_48dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="48dp"
+    android:height="48dp"
+    android:viewportHeight="24.0"
+    android:viewportWidth="24.0">
+    <path
+        android:fillColor="#ffffff"
+        android:pathData="M16.5,3c-1.74,0 -3.41,0.81 -4.5,2.09C10.91,3.81 9.24,3 7.5,3 4.42,3 2,5.42 2,8.5c0,3.78 3.4,6.86 8.55,11.54L12,21.35l1.45,-1.32C18.6,15.36 22,12.28 22,8.5 22,5.42 19.58,3 16.5,3zM12.1,18.55l-0.1,0.1 -0.1,-0.1C7.14,14.24 4,11.39 4,8.5 4,6.5 5.5,5 7.5,5c1.54,0 3.04,0.99 3.57,2.36h1.87C13.46,5.99 14.96,5 16.5,5c2,0 3.5,1.5 3.5,3.5 0,2.89 -3.14,5.74 -7.9,10.05z" />
+</vector>

app/src/main/res/drawable/ic_keyboard_arrow_left_white_48dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="48dp"
+    android:height="48dp"
+    android:viewportHeight="24.0"
+    android:viewportWidth="24.0">
+    <path
+        android:fillColor="#ffffff"
+        android:pathData="M15.41,16.09l-4.58,-4.59 4.58,-4.59L14,5.5l-6,6 6,6z" />
+</vector>

app/src/main/res/drawable/ic_keyboard_arrow_right_white_48dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="48dp"
+    android:height="48dp"
+    android:viewportHeight="24.0"
+    android:viewportWidth="24.0">
+    <path
+        android:fillColor="#ffffff"
+        android:pathData="M8.59,16.34l4.58,-4.59 -4.58,-4.59L10,5.75l6,6 -6,6z" />
+</vector>

app/src/main/res/layout-land/cpp_app_keyboard.xml

@@ -84,7 +84,7 @@
         a:baselineAligned="false"
         a:orientation="horizontal">
 
-        <include layout="@layout/cpp_app_button_paste" />
+        <include layout="@layout/cpp_app_button_like" />
 
         <include layout="@layout/cpp_app_button_percent" />
 

app/src/main/res/layout/cpp_app_button_copy.xml

@@ -22,7 +22,7 @@
   ~ Site:  http://se.solovyev.org
   -->
 
-<org.solovyev.android.calculator.view.NumeralBasesButton
+<org.solovyev.android.views.dragbutton.DirectionDragImageButton
     android:id="@id/cpp_button_copy"
     style="?attr/cpp_button_style_control"
     xmlns:android="http://schemas.android.com/apk/res/android"

app/src/main/res/layout/cpp_app_button_equals_no_bg.xml

@@ -31,6 +31,6 @@
     a:text="="
     a:textColor="?attr/cpp_text_color"
     c:directionTextColor="?attr/cpp_text_color"
-    c:directionTextDown="@string/cpp_plot_button_text"
+    c:directionTextDown="@string/cpp_glyph_graph"
     c:directionTextUp="≡"
     tools:ignore="HardcodedText" />

app/src/main/res/layout/cpp_app_button_history.xml

@@ -28,5 +28,5 @@
     style="?attr/cpp_button_style_control"
     a:src="@drawable/ic_history_white_48dp"
     app:directionTextScale="0.5"
-    app:directionTextDown="@string/cpp_kb_redo"
+    app:directionTextDown="@string/cpp_glyph_redo"
-    app:directionTextUp="@string/cpp_kb_undo" />
+    app:directionTextUp="@string/cpp_glyph_undo" />

app/src/main/res/layout/cpp_app_button_like.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright 2013 serso aka se.solovyev
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~    http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  ~
+  ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+  ~ Contact details
+  ~
+  ~ Email: se.solovyev@gmail.com
+  ~ Site:  http://se.solovyev.org
+  -->
+
+<org.solovyev.android.views.dragbutton.DirectionDragImageButton
+    android:id="@id/cpp_button_like"
+    style="?attr/cpp_button_style_control"
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:src="@drawable/ic_favorite_border_white_48dp" />

app/src/main/res/layout/cpp_app_button_paste.xml

@@ -22,7 +22,7 @@
   ~ Site:  http://se.solovyev.org
   -->
 
-<org.solovyev.android.calculator.view.AngleUnitsButton
+<org.solovyev.android.views.dragbutton.DirectionDragImageButton
     android:id="@id/cpp_button_paste"
     style="?attr/cpp_button_style_control"
     xmlns:android="http://schemas.android.com/apk/res/android"

app/src/main/res/menu/main.xml

@@ -8,7 +8,7 @@
         app:showAsAction="never">
         <menu>
             <item
-                android:icon="@drawable/ic_chevron_left_24dp"
+                android:icon="@drawable/ic_chevron_left_white_24dp"
                 android:title="@string/cpp_mode"
                 app:showAsAction="never" />
             <item
@@ -30,7 +30,7 @@
         app:showAsAction="never">
         <menu>
             <item
-                android:icon="@drawable/ic_chevron_left_24dp"
+                android:icon="@drawable/ic_chevron_left_white_24dp"
                 android:title="@string/cpp_angles"
                 app:showAsAction="never" />
             <item
@@ -52,7 +52,7 @@
         app:showAsAction="never">
         <menu>
             <item
-                android:icon="@drawable/ic_chevron_left_24dp"
+                android:icon="@drawable/ic_chevron_left_white_24dp"
                 android:title="@string/cpp_radix"
                 app:showAsAction="never" />
             <item

app/src/main/res/values/text_glyphs.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="cpp_glyph_paste" translatable="false">"\ue000"</string>
+    <string name="cpp_glyph_copy" translatable="false">"\ue001"</string>
+    <string name="cpp_glyph_left" translatable="false">"\ue002"</string>
+    <string name="cpp_glyph_right" translatable="false">"\ue003"</string>
+    <string name="cpp_glyph_backspace" translatable="false">"\ue004"</string>
+    <string name="cpp_glyph_history" translatable="false">"\ue005"</string>
+    <string name="cpp_glyph_heart" translatable="false">"\ue006"</string>
+    <string name="cpp_glyph_undo" translatable="false">"\ue007"</string>
+    <string name="cpp_glyph_redo" translatable="false">"\ue008"</string>
+    <string name="cpp_glyph_graph" translatable="false">"\ue009"</string>
+</resources>

app/src/main/res/values/text_non_translatable.xml

@@ -17,8 +17,6 @@
     <string name="cpp_show_greek_keyboard" translatable="false">αβγ</string>
     <string name="cpp_exponent" translatable="false">E</string>
     <string name="cpp_theme_black" translatable="false">%1$s (AMOLED)</string>
-    <string name="cpp_glyph_paste">"\ue000"</string>
-    <string name="cpp_glyph_copy">"\ue001"</string>
     <string-array name="cpp_prefs_precisions" translatable="false">
         <item>0</item>
         <item>1</item>

app/src/test/java/org/solovyev/android/calculator/buttons/CppSpecialButtonTest.java

@@ -0,0 +1,20 @@
+package org.solovyev.android.calculator.buttons;
+
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+
+public class CppSpecialButtonTest {
+
+    @Test
+    public void testShouldReturnButtonByGlyph() throws Exception {
+        assertEquals(CppSpecialButton.copy, CppSpecialButton.getByGlyph(CppSpecialButton.copy.glyph));
+        assertEquals(CppSpecialButton.paste, CppSpecialButton.getByGlyph(CppSpecialButton.paste.glyph));
+    }
+
+    @Test
+    public void testShouldReturnNullForButtonWithoutGlyph() throws Exception {
+        assertNull(CppSpecialButton.getByGlyph(CppSpecialButton.brackets_wrap.glyph));
+    }
+}

app/src/test/java/org/solovyev/android/calculator/view/AngleUnitsButtonTest.java

@@ -1,61 +0,0 @@
-package org.solovyev.android.calculator.view;
-
-import android.app.Activity;
-import android.os.Build;
-
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.mockito.Mockito;
-import org.robolectric.Robolectric;
-import org.robolectric.RobolectricGradleTestRunner;
-import org.robolectric.Shadows;
-import org.robolectric.annotation.Config;
-import org.robolectric.res.Attribute;
-import org.robolectric.shadows.ShadowActivity;
-import org.solovyev.android.calculator.BuildConfig;
-
-import java.util.ArrayList;
-
-import static jscl.AngleUnit.deg;
-import static jscl.AngleUnit.grad;
-import static jscl.AngleUnit.rad;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
-import static org.mockito.Mockito.times;
-import static org.mockito.Mockito.verify;
-
-@Config(constants = BuildConfig.class, sdk = Build.VERSION_CODES.LOLLIPOP)
-@RunWith(RobolectricGradleTestRunner.class)
-public class AngleUnitsButtonTest {
-
-    private AngleUnitsButton button;
-
-    @Before
-    public void setUp() throws Exception {
-        final Activity context = Robolectric.buildActivity(Activity.class).create().get();
-        final ShadowActivity activity = Shadows.shadowOf(context);
-        button = new AngleUnitsButton(context, activity.createAttributeSet(new ArrayList<Attribute>(), AngleUnitsButton.class));
-    }
-
-    @Test
-    public void testIsCurrentAngleUnits() throws Exception {
-        button.setAngleUnit(rad);
-        assertTrue(button.isCurrentAngleUnits(rad.name()));
-        assertFalse(button.isCurrentAngleUnits(deg.name()));
-        assertFalse(button.isCurrentAngleUnits(grad.name()));
-    }
-
-    @Test
-    public void testInvalidateShouldBeCalledOnlyWhenChangeIsDone() throws Exception {
-        button.setAngleUnit(rad);
-
-        button = Mockito.spy(button);
-
-        button.setAngleUnit(deg);
-        verify(button, times(1)).invalidate();
-
-        button.setAngleUnit(deg);
-        verify(button, times(1)).invalidate();
-    }
-}

app/src/test/java/org/solovyev/android/calculator/view/NumeralBasesButtonTest.java

@@ -1,61 +0,0 @@
-package org.solovyev.android.calculator.view;
-
-import android.app.Activity;
-import android.os.Build;
-
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.mockito.Mockito;
-import org.robolectric.Robolectric;
-import org.robolectric.RobolectricGradleTestRunner;
-import org.robolectric.Shadows;
-import org.robolectric.annotation.Config;
-import org.robolectric.res.Attribute;
-import org.robolectric.shadows.ShadowActivity;
-import org.solovyev.android.calculator.BuildConfig;
-
-import java.util.ArrayList;
-
-import static jscl.NumeralBase.bin;
-import static jscl.NumeralBase.dec;
-import static jscl.NumeralBase.hex;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
-import static org.mockito.Mockito.times;
-import static org.mockito.Mockito.verify;
-
-@Config(constants = BuildConfig.class, sdk = Build.VERSION_CODES.LOLLIPOP)
-@RunWith(RobolectricGradleTestRunner.class)
-public class NumeralBasesButtonTest {
-
-    private NumeralBasesButton button;
-
-    @Before
-    public void setUp() throws Exception {
-        final Activity context = Robolectric.buildActivity(Activity.class).create().get();
-        final ShadowActivity activity = Shadows.shadowOf(context);
-        button = new NumeralBasesButton(context, activity.createAttributeSet(new ArrayList<Attribute>(), NumeralBasesButton.class));
-    }
-
-    @Test
-    public void testIsCurrentNumeralBase() throws Exception {
-        button.setNumeralBase(dec);
-        assertTrue(button.isCurrentNumberBase(dec.name()));
-        assertFalse(button.isCurrentNumberBase(hex.name()));
-        assertFalse(button.isCurrentNumberBase(bin.name()));
-    }
-
-    @Test
-    public void testInvalidateShouldBeCalledOnlyWhenChangeIsDone() throws Exception {
-        button.setNumeralBase(dec);
-
-        button = Mockito.spy(button);
-
-        button.setNumeralBase(hex);
-        verify(button, times(1)).invalidate();
-
-        button.setNumeralBase(hex);
-        verify(button, times(1)).invalidate();
-    }
-}