New main menu

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

@@ -224,7 +224,16 @@ public class BaseActivity extends AppCompatActivity implements SharedPreferences
 
     @Override
     public boolean onKeyUp(int keyCode, KeyEvent event) {
-        if (keyCode == KeyEvent.KEYCODE_MENU && event.getRepeatCount() == 0 && toolbar != null) {
+        if (keyCode == KeyEvent.KEYCODE_MENU && event.getRepeatCount() == 0) {
+            return toggleMenu();
+        }
+        return super.onKeyUp(keyCode, event);
+    }
+
+    protected boolean toggleMenu() {
+        if (toolbar == null) {
+            return false;
+        }
         if (toolbar.isOverflowMenuShowing()) {
             toolbar.hideOverflowMenu();
         } else {
@@ -232,8 +241,6 @@ public class BaseActivity extends AppCompatActivity implements SharedPreferences
         }
         return true;
     }
-        return super.onKeyUp(keyCode, event);
-    }
 
     @Override
     protected void onResume() {

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

@@ -75,8 +75,6 @@ public class Calculator implements SharedPreferences.OnSharedPreferenceChangeLis
 
     private volatile boolean calculateOnFly = true;
 
-    @Inject
-    PreferredPreferences preferredPreferences;
     @Inject
     Editor editor;
     @Inject
@@ -162,7 +160,6 @@ public class Calculator implements SharedPreferences.OnSharedPreferenceChangeLis
             return;
         }
 
-        preferredPreferences.check(false);
         PreparedExpression pe = null;
         try {
             pe = prepare(e);

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

@@ -23,30 +23,37 @@
 package org.solovyev.android.calculator;
 
 import android.content.SharedPreferences;
+import android.graphics.Typeface;
 import android.os.Bundle;
+import android.support.annotation.StringRes;
 import android.support.v4.app.FragmentManager;
 import android.support.v4.app.FragmentTransaction;
+import android.support.v4.view.GravityCompat;
 import android.support.v7.widget.PopupMenu;
+import android.text.SpannableString;
+import android.text.Spanned;
+import android.text.style.StyleSpan;
 import android.view.KeyEvent;
+import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.FrameLayout;
-import android.widget.ImageButton;
 import butterknife.Bind;
+import jscl.AngleUnit;
+import jscl.NumeralBase;
 import org.solovyev.android.calculator.converter.ConverterFragment;
 import org.solovyev.android.calculator.history.History;
 import org.solovyev.android.calculator.keyboard.PartialKeyboardUi;
+import org.solovyev.android.widget.menu.CustomPopupMenu;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import javax.inject.Inject;
 
-public class CalculatorActivity extends BaseActivity implements View.OnClickListener, PopupMenu.OnMenuItemClickListener {
+public class CalculatorActivity extends BaseActivity implements View.OnClickListener {
 
     @Nonnull
-    private final MainMenu mainMenu = new MainMenu(this);
+    private final MainMenu mainMenu = new MainMenu();
-    @Inject
-    PreferredPreferences preferredPreferences;
     @Inject
     Keyboard keyboard;
     @Inject
@@ -63,7 +70,7 @@ public class CalculatorActivity extends BaseActivity implements View.OnClickList
     @Bind(R.id.editor)
     FrameLayout editor;
     @Bind(R.id.main_menu)
-    ImageButton mainMenuButton;
+    View mainMenuButton;
     private boolean useBackAsPrevious;
 
     public CalculatorActivity() {
@@ -93,8 +100,6 @@ public class CalculatorActivity extends BaseActivity implements View.OnClickList
         if (savedInstanceState == null) {
             startupHelper.onMainActivityOpened(this);
         }
-
-        preferredPreferences.check(this, false);
     }
 
     @Override
@@ -139,6 +144,115 @@ public class CalculatorActivity extends BaseActivity implements View.OnClickList
         if (Preferences.Gui.useBackAsPrevious.isSameKey(key)) {
             useBackAsPrevious = Preferences.Gui.useBackAsPrevious.getPreference(preferences);
         }
+        mainMenu.onSharedPreferenceChanged(key);
+    }
+
+    @Override
+    public void onClick(View v) {
+        switch (v.getId()) {
+            case R.id.main_menu:
+                mainMenu.toggle();
+                break;
+        }
+    }
+
+    @Override
+    protected boolean toggleMenu() {
+        if (!super.toggleMenu()) {
+            mainMenu.toggle();
+        }
+        return true;
+    }
+
+    final class MainMenu implements PopupMenu.OnMenuItemClickListener {
+
+        @Nullable
+        private CustomPopupMenu popup;
+
+        public void toggle() {
+            if (popup == null) {
+                popup = new CustomPopupMenu(CalculatorActivity.this, mainMenuButton, GravityCompat.END, R.attr.actionOverflowMenuStyle, 0);
+                popup.inflate(R.menu.main);
+                popup.setOnMenuItemClickListener(this);
+                popup.setKeepOnSubMenu(true);
+                popup.setForceShowIcon(true);
+            }
+            if (popup.isShowing()) {
+                popup.dismiss();
+            } else {
+                updateMode();
+                updateAngleUnits();
+                updateNumeralBase();
+                popup.show();
+            }
+        }
+
+        private void updateMode() {
+            if (popup == null) {
+                return;
+            }
+            final Menu menu = popup.getMenu();
+            final MenuItem menuItem = menu.findItem(R.id.menu_mode);
+            menuItem.setTitle(makeTitle(R.string.cpp_mode, getActivityMode().name));
+        }
+
+        @Nonnull
+        private CharSequence makeTitle(@StringRes int prefix, @StringRes int suffix) {
+            final String p = getString(prefix);
+            final String s = getString(suffix);
+            final SpannableString title = new SpannableString(p + ": " + s);
+            title.setSpan(new StyleSpan(Typeface.BOLD), 0, p.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+            return title;
+        }
+
+        private void updateAngleUnits() {
+            if (popup == null) {
+                return;
+            }
+            final Menu menu = popup.getMenu();
+            final MenuItem menuItem = menu.findItem(R.id.menu_angle_units);
+            final AngleUnit angles = Engine.Preferences.angleUnit.getPreference(preferences);
+            menuItem.setTitle(makeTitle(R.string.cpp_angles, getAngleUnitsName(angles)));
+        }
+
+        private void updateNumeralBase() {
+            if (popup == null) {
+                return;
+            }
+            final Menu menu = popup.getMenu();
+            final MenuItem menuItem = menu.findItem(R.id.menu_numeral_base);
+            final NumeralBase numeralBase = Engine.Preferences.numeralBase.getPreference(preferences);
+            menuItem.setTitle(makeTitle(R.string.cpp_radix, getNumeralBaseName(numeralBase)));
+        }
+
+        @StringRes
+        private int getAngleUnitsName(AngleUnit angleUnit) {
+            switch (angleUnit) {
+                case deg:
+                    return R.string.p_deg;
+                case rad:
+                    return R.string.p_rad;
+                case grad:
+                    return R.string.p_grad;
+                case turns:
+                    return R.string.p_turns;
+            }
+            return 0;
+        }
+
+        @StringRes
+        private int getNumeralBaseName(NumeralBase numeralBase) {
+            switch (numeralBase) {
+                case bin:
+                    return R.string.p_bin;
+                case oct:
+                    return R.string.p_oct;
+                case dec:
+                    return R.string.p_dec;
+                case hex:
+                    return R.string.p_hex;
+            }
+            return 0;
         }
 
         @Override
@@ -154,29 +268,46 @@ public class CalculatorActivity extends BaseActivity implements View.OnClickList
                     launcher.showPlotter();
                     return true;
                 case R.id.menu_conversion_tool:
-                ConverterFragment.show(this);
+                    ConverterFragment.show(CalculatorActivity.this);
                     return true;
                 case R.id.menu_about:
                     launcher.showAbout();
                     return true;
-/*            case R.id.menu_mode_engineer:
+                case R.id.menu_mode_engineer:
                     Preferences.Gui.mode.putPreference(preferences, Preferences.Gui.Mode.engineer);
                     restartIfModeChanged();
                     return true;
                 case R.id.menu_mode_simple:
                     Preferences.Gui.mode.putPreference(preferences, Preferences.Gui.Mode.simple);
                     restartIfModeChanged();
-                return true;*/
+                    return true;
+                case R.id.menu_au_deg:
+                    Engine.Preferences.angleUnit.putPreference(preferences, AngleUnit.deg);
+                    return true;
+                case R.id.menu_au_rad:
+                    Engine.Preferences.angleUnit.putPreference(preferences, AngleUnit.rad);
+                    return true;
+                case R.id.menu_nb_bin:
+                    Engine.Preferences.numeralBase.putPreference(preferences, NumeralBase.bin);
+                    return true;
+                case R.id.menu_nb_dec:
+                    Engine.Preferences.numeralBase.putPreference(preferences, NumeralBase.dec);
+                    return true;
+                case R.id.menu_nb_hex:
+                    Engine.Preferences.numeralBase.putPreference(preferences, NumeralBase.hex);
+                    return true;
             }
             return false;
         }
 
-    @Override
+        public void onSharedPreferenceChanged(String key) {
-    public void onClick(View v) {
+            if (Preferences.Gui.mode.isSameKey(key)) {
-        switch (v.getId()) {
+                updateMode();
-            case R.id.main_menu:
+            } else if (Engine.Preferences.angleUnit.isSameKey(key)) {
-                mainMenu.toggle();
+                updateAngleUnits();
-                break;
+            } else if (Engine.Preferences.numeralBase.isSameKey(key)) {
+                updateNumeralBase();
+            }
         }
     }
 }

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

@@ -91,9 +91,6 @@ public class CalculatorApplication extends android.app.Application implements Sh
     @Inject
     Notifier notifier;
 
-    @Inject
-    PreferredPreferences preferredPreferences;
-
     @Inject
     ActivityLauncher launcher;
 

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

@@ -58,7 +58,7 @@ public class Display {
     @Inject
     Lazy<Notifier> notifier;
     @Inject
-    Lazy<PreferredPreferences> preferredPreferences;
+    Lazy<UiPreferences> uiPreferences;
     @Nullable
     private DisplayView view;
     @Nonnull
@@ -88,7 +88,7 @@ public class Display {
     public void onCalculationFinished(@Nonnull CalculationFinishedEvent e) {
         if (e.sequence < state.sequence) return;
         setState(DisplayState.createValid(e.operation, e.result, e.stringResult, e.sequence));
-        if (!e.messages.isEmpty() && preferredPreferences.get().isShowWarningDialog()) {
+        if (!e.messages.isEmpty() && uiPreferences.get().isShowFixableErrorDialog()) {
             final Context context = view != null ? view.getContext() : application;
             FixableErrorsActivity.show(context, e.messages);
         }

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

@@ -137,8 +137,6 @@ public final class Preferences {
         Gui.language.tryPutDefault(preferences, editor);
 
         Calculations.calculateOnFly.tryPutDefault(preferences, editor);
-        Calculations.preferredAngleUnits.tryPutDefault(preferences, editor);
-        Calculations.preferredNumeralBase.tryPutDefault(preferences, editor);
 
         Onscreen.showAppIcon.tryPutDefault(preferences, editor);
         Onscreen.theme.tryPutDefault(preferences, editor);
@@ -261,8 +259,6 @@ public final class Preferences {
 
     public static class Calculations {
         public static final Preference<Boolean> calculateOnFly = BooleanPreference.of("calculations_calculate_on_fly", true);
-        public static final Preference<NumeralBase> preferredNumeralBase = StringPreference.ofEnum("preferred_numeral_base", Engine.Preferences.numeralBase.getDefaultValue(), NumeralBase.class);
-        public static final Preference<AngleUnit> preferredAngleUnits = StringPreference.ofEnum("preferred_angle_units", Engine.Preferences.angleUnit.getDefaultValue(), AngleUnit.class);
     }
 
     public static class App {

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

@@ -1,121 +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;
-
-import android.app.Application;
-import android.content.Context;
-import android.content.SharedPreferences;
-import jscl.AngleUnit;
-import jscl.NumeralBase;
-import org.solovyev.android.calculator.errors.FixableError;
-import org.solovyev.android.calculator.errors.FixableErrorType;
-import org.solovyev.android.calculator.errors.FixableErrorsActivity;
-import org.solovyev.common.msg.MessageType;
-
-import javax.annotation.Nonnull;
-import javax.inject.Inject;
-import javax.inject.Singleton;
-import java.util.ArrayList;
-import java.util.concurrent.TimeUnit;
-
-@Singleton
-public class PreferredPreferences {
-
-    private static final long PREFERRED_PREFS_INTERVAL_TIME = TimeUnit.MINUTES.toMillis(15);
-
-    private long lastCheckTime;
-    private boolean showWarningDialog = true;
-
-    @Inject
-    Application application;
-    @Inject
-    SharedPreferences preferences;
-    @Inject
-    Notifier notifier;
-
-    @Inject
-    public PreferredPreferences() {
-    }
-
-    public void check(boolean force) {
-        check(application, force);
-    }
-
-    public void check(@Nonnull Context context, boolean force) {
-        final long now = System.currentTimeMillis();
-
-        if (!force) {
-            if (!showWarningDialog) {
-                // user has disabled calculation message dialogs until the next session
-                return;
-            }
-            if (now - lastCheckTime < PREFERRED_PREFS_INTERVAL_TIME) {
-                return;
-            }
-        }
-
-        final NumeralBase preferredNumeralBase = Preferences.Calculations.preferredNumeralBase.getPreference(preferences);
-        final NumeralBase numeralBase = Engine.Preferences.numeralBase.getPreference(preferences);
-
-        final AngleUnit preferredAngleUnits = Preferences.Calculations.preferredAngleUnits.getPreference(preferences);
-        final AngleUnit angleUnits = Engine.Preferences.angleUnit.getPreference(preferences);
-
-        final ArrayList<FixableError> messages = new ArrayList<>(2);
-        if (numeralBase != preferredNumeralBase) {
-            messages.add(new FixableError(application.getString(R.string.preferred_numeral_base_message, preferredNumeralBase.name(), numeralBase.name()), MessageType.warning, FixableErrorType.preferred_numeral_base));
-        }
-
-        if (angleUnits != preferredAngleUnits) {
-            messages.add(new FixableError(application.getString(R.string.preferred_angle_units_message, preferredAngleUnits.name(), angleUnits.name()), MessageType.warning, FixableErrorType.preferred_angle_units));
-        }
-
-        FixableErrorsActivity.show(context, messages);
-        lastCheckTime = now;
-    }
-
-    public void setPreferredAngleUnits() {
-        setAngleUnits(Preferences.Calculations.preferredAngleUnits.getPreference(preferences));
-    }
-
-    public void setAngleUnits(@Nonnull AngleUnit angleUnit) {
-        Engine.Preferences.angleUnit.putPreference(preferences, angleUnit);
-        notifier.showMessage(R.string.c_angle_units_changed_to, angleUnit.name());
-    }
-
-    public void setPreferredNumeralBase() {
-        setNumeralBase(Preferences.Calculations.preferredNumeralBase.getPreference(preferences));
-    }
-
-    public void setNumeralBase(@Nonnull NumeralBase numeralBase) {
-        Engine.Preferences.numeralBase.putPreference(preferences, numeralBase);
-        notifier.showMessage(R.string.c_numeral_base_changed_to, numeralBase.name());
-    }
-
-    public boolean isShowWarningDialog() {
-        return showWarningDialog;
-    }
-
-    public void dontShowWarningDialog() {
-        showWarningDialog = false;
-    }
-}

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

@@ -7,8 +7,11 @@ import org.solovyev.android.prefs.IntegerPreference;
 import org.solovyev.android.prefs.Preference;
 
 import javax.annotation.Nonnull;
+import javax.inject.Inject;
+import javax.inject.Singleton;
 
-final class UiPreferences {
+@Singleton
+public final class UiPreferences {
     @NonNull
     public static final Preference<Integer> opened = IntegerPreference.of("opened", 0);
     @NonNull
@@ -17,6 +20,11 @@ final class UiPreferences {
     public static final Preference<Integer> appVersion = IntegerPreference.of("appVersion", IntegerPreference.DEF_VALUE);
     @NonNull
     public static final Preference<Boolean> rateUsShown = BooleanPreference.of("rateUsShown", false);
+    public boolean showFixableErrorDialog = true;
+
+    @Inject
+    public UiPreferences() {
+    }
 
     public static void init(@NonNull SharedPreferences preferences, @NonNull SharedPreferences uiPreferences) {
         final int currentVersion = getVersion(uiPreferences);
@@ -45,4 +53,12 @@ final class UiPreferences {
         }
         return 0;
     }
+
+    public boolean isShowFixableErrorDialog() {
+        return showFixableErrorDialog;
+    }
+
+    public void setShowFixableErrorDialog(boolean showFixableErrorDialog) {
+        this.showFixableErrorDialog = showFixableErrorDialog;
+    }
 }

app/src/main/java/org/solovyev/android/calculator/errors/FixableErrorFragment.java

@@ -7,13 +7,8 @@ import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
 import android.support.v4.app.FragmentManager;
 import android.support.v7.app.AlertDialog;
-
 import org.solovyev.android.Check;
-import org.solovyev.android.calculator.App;
+import org.solovyev.android.calculator.*;
-import org.solovyev.android.calculator.AppComponent;
-import org.solovyev.android.calculator.BaseDialogFragment;
-import org.solovyev.android.calculator.PreferredPreferences;
-import org.solovyev.android.calculator.R;
 
 import javax.annotation.Nonnull;
 import javax.inject.Inject;
@@ -24,7 +19,7 @@ public class FixableErrorFragment extends BaseDialogFragment {
     @Nonnull
     private static final String ARG_ERROR = "error";
     @Inject
-    PreferredPreferences preferredPreferences;
+    UiPreferences uiPreferences;
     private FixableError error;
     @Nullable
     private FixableErrorsActivity activity;
@@ -75,12 +70,12 @@ public class FixableErrorFragment extends BaseDialogFragment {
     public void onClick(DialogInterface dialog, int which) {
         switch (which) {
             case DialogInterface.BUTTON_NEUTRAL:
-                preferredPreferences.dontShowWarningDialog();
+                uiPreferences.setShowFixableErrorDialog(false);
                 dismiss();
                 break;
             case DialogInterface.BUTTON_POSITIVE:
                 assert error.error != null;
-                error.error.fix(preferredPreferences);
+                error.error.fix(preferences);
                 dismiss();
                 break;
             default:

app/src/main/java/org/solovyev/android/calculator/errors/FixableErrorType.java

@@ -22,9 +22,11 @@
 
 package org.solovyev.android.calculator.errors;
 
+import android.content.SharedPreferences;
 import jscl.AngleUnit;
 import jscl.text.msg.Messages;
-import org.solovyev.android.calculator.PreferredPreferences;
+import org.solovyev.android.calculator.Engine;
+import org.solovyev.android.calculator.Preferences;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
@@ -35,22 +37,8 @@ public enum FixableErrorType {
 
     must_be_rad(Messages.msg_23, Messages.msg_24, Messages.msg_25) {
         @Override
-        public void fix(@Nonnull PreferredPreferences preferences) {
+        public void fix(@Nonnull SharedPreferences preferences) {
-            preferences.setAngleUnits(AngleUnit.rad);
+            Engine.Preferences.angleUnit.putPreference(preferences, AngleUnit.rad);
-        }
-    },
-
-    preferred_numeral_base() {
-        @Override
-        public void fix(@Nonnull PreferredPreferences preferences) {
-            preferences.setPreferredNumeralBase();
-        }
-    },
-
-    preferred_angle_units() {
-        @Override
-        public void fix(@Nonnull PreferredPreferences preferences) {
-            preferences.setPreferredAngleUnits();
         }
     };
 
@@ -71,5 +59,5 @@ public enum FixableErrorType {
         return null;
     }
 
-    public abstract void fix(@Nonnull PreferredPreferences preferences);
+    public abstract void fix(@Nonnull SharedPreferences preferences);
 }

app/src/main/java/org/solovyev/android/calculator/errors/FixableErrorsActivity.java

@@ -29,7 +29,7 @@ import android.os.Bundle;
 import android.support.v4.app.Fragment;
 import android.support.v7.app.AppCompatActivity;
 import org.solovyev.android.calculator.App;
-import org.solovyev.android.calculator.PreferredPreferences;
+import org.solovyev.android.calculator.UiPreferences;
 import org.solovyev.common.msg.Message;
 
 import javax.annotation.Nonnull;
@@ -46,7 +46,7 @@ public class FixableErrorsActivity extends AppCompatActivity {
     @Inject
     SharedPreferences preferences;
     @Inject
-    PreferredPreferences preferredPreferences;
+    UiPreferences uiPreferences;
     private ArrayList<FixableError> errors;
 
     public static void show(@Nonnull Context context, @Nonnull List<Message> messages) {
@@ -96,7 +96,7 @@ public class FixableErrorsActivity extends AppCompatActivity {
             finish();
             return;
         }
-        if (!preferredPreferences.isShowWarningDialog()) {
+        if (!uiPreferences.isShowFixableErrorDialog()) {
             finish();
             return;
         }

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

@@ -56,8 +56,6 @@ public abstract class BaseKeyboardUi implements SharedPreferences.OnSharedPrefer
     ActivityLauncher launcher;
     @Inject
     Lazy<Memory> memory;
-    @Inject
-    PreferredPreferences preferredPreferences;
     protected int orientation = ORIENTATION_PORTRAIT;
     private int textSize;
     private Preferences.Gui.Mode mode;

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

@@ -5,14 +5,12 @@ import android.app.Application;
 import android.content.SharedPreferences;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
-import android.text.TextUtils;
 import android.util.Log;
 import android.view.View;
 import android.widget.Button;
 import android.widget.ImageButton;
 import butterknife.Bind;
 import butterknife.ButterKnife;
-import jscl.AngleUnit;
 import jscl.NumeralBase;
 import jscl.math.Expression;
 import jscl.math.Generic;
@@ -271,10 +269,6 @@ public class KeyboardUi extends BaseKeyboardUi {
                 return false;
             case R.id.cpp_button_memory:
                 return processMemoryButton(direction);
-            case R.id.cpp_button_copy:
-                return processNumeralBaseButton(direction, (DirectionDragView) view);
-            case R.id.cpp_button_paste:
-                return processAngleUnitsButton(direction, (DirectionDragView) view);
             case R.id.cpp_button_round_brackets:
                 if (direction == left) {
                     keyboard.roundBracketsButtonPressed();
@@ -314,47 +308,8 @@ public class KeyboardUi extends BaseKeyboardUi {
         return false;
     }
 
-    private boolean processAngleUnitsButton(@Nonnull DragDirection direction, @Nonnull DirectionDragView button) {
-        if (direction == DragDirection.left) {
-            return processDefault(direction, button);
-        }
-        final String text = button.getText(direction).getValue();
-        if (TextUtils.isEmpty(text)) {
-            return processDefault(direction, button);
-        }
-        try {
-            final AngleUnit newAngleUnits = AngleUnit.valueOf(text);
-            final AngleUnit oldAngleUnits = Engine.Preferences.angleUnit.getPreference(preferences);
-            if (oldAngleUnits != newAngleUnits) {
-                preferredPreferences.setAngleUnits(newAngleUnits);
-                return true;
-            }
-        } catch (IllegalArgumentException e) {
-            Log.d(this.getClass().getName(), "Unsupported angle units: " + text);
-        }
-        return false;
-    }
-
     private boolean processDefault(@Nonnull DragDirection direction, @Nonnull DirectionDragView button) {
         final String text = button.getText(direction).getValue();
         return keyboard.buttonPressed(text);
     }
-
-    private boolean processNumeralBaseButton(@Nonnull DragDirection direction, @Nonnull DirectionDragView button) {
-        final String text = button.getText(direction).getValue();
-        if (TextUtils.isEmpty(text)) {
-            return false;
-        }
-        try {
-            final NumeralBase newNumeralBase = NumeralBase.valueOf(text);
-            final NumeralBase oldNumeralBase = Engine.Preferences.numeralBase.getPreference(preferences);
-            if (oldNumeralBase != newNumeralBase) {
-                preferredPreferences.setNumeralBase(newNumeralBase);
-                return true;
-            }
-        } catch (IllegalArgumentException e) {
-            Log.d(this.getClass().getName(), "Unsupported numeral base: " + text);
-        }
-        return false;
-    }
 }

app/src/main/java/org/solovyev/android/calculator/wizard/CalculatorMode.java

@@ -37,7 +37,6 @@ enum CalculatorMode {
             final SharedPreferences.Editor editor = preferences.edit();
 
             Preferences.Gui.mode.putPreference(editor, Preferences.Gui.Mode.simple);
-            Preferences.Calculations.preferredAngleUnits.putPreference(editor, AngleUnit.deg);
             Engine.Preferences.angleUnit.putPreference(editor, AngleUnit.deg);
             Engine.Preferences.Output.scientificNotation.putPreference(editor, false);
             Engine.Preferences.Output.round.putPreference(editor, true);
@@ -52,7 +51,6 @@ enum CalculatorMode {
             final SharedPreferences.Editor editor = preferences.edit();
 
             Preferences.Gui.mode.putPreference(editor, Preferences.Gui.Mode.engineer);
-            Preferences.Calculations.preferredAngleUnits.putPreference(editor, AngleUnit.rad);
             Engine.Preferences.angleUnit.putPreference(editor, AngleUnit.rad);
             Engine.Preferences.Output.scientificNotation.putPreference(editor, true);
             Engine.Preferences.Output.round.putPreference(editor, false);

app/src/main/java/org/solovyev/android/widget/menu/CustomPopupMenu.java

@@ -21,7 +21,6 @@ import android.support.annotation.MenuRes;
 import android.support.v7.appcompat.R;
 import android.support.v7.view.SupportMenuInflater;
 import android.support.v7.view.menu.MenuBuilder;
-import android.support.v7.view.menu.MenuPopupHelper;
 import android.support.v7.view.menu.MenuPresenter;
 import android.support.v7.view.menu.SubMenuBuilder;
 import android.support.v7.widget.ListPopupWindow;
@@ -120,20 +119,8 @@ public class CustomPopupMenu implements MenuBuilder.Callback, MenuPresenter.Call
         mPopup.setGravity(gravity);
     }
 
-    public int getHorizontalOffset() {
+    public void setForceShowIcon(boolean forceShow) {
-        return mPopup.getHorizontalOffset();
+        mPopup.setForceShowIcon(forceShow);
-    }
-
-    public void setVerticalOffset(int offset) {
-        mPopup.setVerticalOffset(offset);
-    }
-
-    public int getVerticalOffset() {
-        return mPopup.getVerticalOffset();
-    }
-
-    public void setHorizontalOffset(int offset) {
-        mPopup.setHorizontalOffset(offset);
     }
 
     /**
@@ -194,7 +181,14 @@ public class CustomPopupMenu implements MenuBuilder.Callback, MenuPresenter.Call
      * @see #getMenu()
      */
     public MenuInflater getMenuInflater() {
-        return new SupportMenuInflater(mContext);
+        return new SupportMenuInflater(mContext) {
+            @Override
+            public void inflate(int menuRes, Menu menu) {
+                final int sizeBefore = menu.size();
+                super.inflate(menuRes, menu);
+                CustomPopupMenuHelper.tintMenuItems(mContext, menu, sizeBefore, menu.size());
+            }
+        };
     }
 
     /**
@@ -225,6 +219,10 @@ public class CustomPopupMenu implements MenuBuilder.Callback, MenuPresenter.Call
         mPopup.dismiss();
     }
 
+    public void setKeepOnSubMenu(boolean keepOnSubMenu) {
+        mPopup.setKeepOnSubMenu(keepOnSubMenu);
+    }
+
     /**
      * @return {@code true} if the popup is currently showing, {@code false} otherwise.
      */
@@ -270,8 +268,6 @@ public class CustomPopupMenu implements MenuBuilder.Callback, MenuPresenter.Call
             return true;
         }
 
-        // Current menu will be dismissed by the normal helper, submenu will be shown in its place.
-        new MenuPopupHelper(mContext, subMenu, mAnchor).show();
         return true;
     }
 

app/src/main/java/org/solovyev/android/widget/menu/CustomPopupMenuHelper.java

@@ -18,8 +18,12 @@ package org.solovyev.android.widget.menu;
 
 import android.annotation.SuppressLint;
 import android.content.Context;
+import android.content.res.ColorStateList;
 import android.content.res.Resources;
+import android.content.res.TypedArray;
+import android.graphics.drawable.Drawable;
 import android.os.Parcelable;
+import android.support.v4.graphics.drawable.DrawableCompat;
 import android.support.v4.view.ActionProvider;
 import android.support.v4.view.MenuItemCompat;
 import android.support.v7.appcompat.R;
@@ -30,7 +34,9 @@ import android.view.View.MeasureSpec;
 import android.widget.*;
 
 import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
 import java.util.ArrayList;
+import java.util.List;
 
 /**
  * Presents a menu as a small, simple popup anchored to another view.
@@ -42,6 +48,7 @@ public class CustomPopupMenuHelper implements AdapterView.OnItemClickListener, V
         MenuPresenter {
 
     private static final int DEFAULT_VIEW_TAG_KEY = org.solovyev.android.calculator.R.id.cpm_default_view_tag_key;
+    private static final int[] COLOR_ATTRS = new int[]{R.attr.colorControlNormal};
     private static final Object DEFAULT_VIEW_TAG = new Object();
 
     private final Context mContext;
@@ -58,6 +65,7 @@ public class CustomPopupMenuHelper implements AdapterView.OnItemClickListener, V
     private ViewTreeObserver mTreeObserver;
     private Callback mPresenterCallback;
     private ViewGroup mMeasureParent;
+    private boolean mKeepOnSubMenu;
 
     /**
      * Whether the cached content width value is valid.
@@ -70,8 +78,6 @@ public class CustomPopupMenuHelper implements AdapterView.OnItemClickListener, V
     private int mContentWidth;
 
     private int mGravity = Gravity.NO_GRAVITY;
-    private int mVerticalOffset;
-    private int mHorizontalOffset;
 
     public CustomPopupMenuHelper(Context context, MenuBuilder menu) {
         this(context, menu, null, false, R.attr.popupMenuStyle);
@@ -106,6 +112,47 @@ public class CustomPopupMenuHelper implements AdapterView.OnItemClickListener, V
         menu.addMenuPresenter(this, context);
     }
 
+    static void tintMenuItem(@Nonnull MenuItemImpl item, @Nonnull ColorStateList tintColorStateList) {
+        Drawable icon = item.getIcon();
+        if (icon != null) {
+            icon = DrawableCompat.wrap(icon);
+            DrawableCompat.setTintList(icon, tintColorStateList);
+            item.setIcon(icon);
+        }
+        if (item.hasSubMenu()) {
+            final SubMenu subMenu = item.getSubMenu();
+            for (int i = 0; i < subMenu.size(); i++) {
+                final MenuItem subItem = subMenu.getItem(i);
+                if (subItem instanceof MenuItemImpl) {
+                    tintMenuItem((MenuItemImpl) subItem, tintColorStateList);
+                }
+            }
+        }
+    }
+
+    @Nullable
+    static ColorStateList getTintColorStateList(Context context) {
+        final TypedArray a = context.obtainStyledAttributes(null, COLOR_ATTRS);
+        try {
+            return a.getColorStateList(0);
+        } finally {
+            a.recycle();
+        }
+    }
+
+    static void tintMenuItems(Context context, Menu menu, int from, int to) {
+        final ColorStateList tintColorStateList = getTintColorStateList(context);
+        if (tintColorStateList == null) {
+            return;
+        }
+        for (int i = from; i < to; i++) {
+            final MenuItem item = menu.getItem(i);
+            if (item instanceof MenuItemImpl) {
+                tintMenuItem((MenuItemImpl) item, tintColorStateList);
+            }
+        }
+    }
+
     public void setAnchorView(View anchor) {
         mAnchorView = anchor;
     }
@@ -122,20 +169,12 @@ public class CustomPopupMenuHelper implements AdapterView.OnItemClickListener, V
         mGravity = gravity;
     }
 
-    public void setVerticalOffset(int offset) {
+    public boolean isKeepOnSubMenu() {
-        mVerticalOffset = offset;
+        return mKeepOnSubMenu;
     }
 
-    public int getVerticalOffset() {
+    public void setKeepOnSubMenu(boolean keepOnSubMenu) {
-        return mVerticalOffset;
+        mKeepOnSubMenu = keepOnSubMenu;
-    }
-
-    public void setHorizontalOffset(int offset) {
-        mHorizontalOffset = offset;
-    }
-
-    public int getHorizontalOffset() {
-        return mHorizontalOffset;
     }
 
     public void show() {
@@ -162,8 +201,6 @@ public class CustomPopupMenuHelper implements AdapterView.OnItemClickListener, V
             if (addGlobalListener) mTreeObserver.addOnGlobalLayoutListener(this);
             mPopup.setAnchorView(anchor);
             mPopup.setDropDownGravity(mGravity);
-            mPopup.setHorizontalOffset(mHorizontalOffset);
-            mPopup.setVerticalOffset(mVerticalOffset);
         } else {
             return false;
         }
@@ -291,8 +328,10 @@ public class CustomPopupMenuHelper implements AdapterView.OnItemClickListener, V
     @Override
     public boolean onSubMenuSelected(SubMenuBuilder subMenu) {
         if (subMenu.hasVisibleItems()) {
-            CustomPopupMenuHelper subPopup = new CustomPopupMenuHelper(mContext, subMenu, mAnchorView);
+            CustomPopupMenuHelper subPopup = new CustomPopupMenuHelper(mContext, subMenu, mAnchorView, false, mPopupStyleAttr, mPopupStyleRes);
+            subPopup.setGravity(mGravity);
             subPopup.setCallback(mPresenterCallback);
+            subPopup.setKeepOnSubMenu(mKeepOnSubMenu);
 
             boolean preserveIconSpacing = false;
             final int count = subMenu.size();
@@ -320,6 +359,9 @@ public class CustomPopupMenuHelper implements AdapterView.OnItemClickListener, V
         // Only care about the (sub)menu we're presenting.
         if (menu != mMenu) return;
 
+        if (isKeepOnSubMenu() && !allMenusAreClosing) {
+            return;
+        }
         dismiss();
         if (mPresenterCallback != null) {
             mPresenterCallback.onCloseMenu(menu, allMenusAreClosing);
@@ -402,14 +444,17 @@ public class CustomPopupMenuHelper implements AdapterView.OnItemClickListener, V
 
         @Nonnull
         private View getDefaultView(MenuItemImpl item, View convertView, ViewGroup parent) {
-            if (convertView == null || convertView.getTag(DEFAULT_VIEW_TAG_KEY) == DEFAULT_VIEW_TAG) {
+            if (convertView == null || convertView.getTag(DEFAULT_VIEW_TAG_KEY) != DEFAULT_VIEW_TAG) {
                 convertView = mInflater.inflate(R.layout.abc_popup_menu_item_layout, parent, false);
                 convertView.setTag(DEFAULT_VIEW_TAG_KEY, DEFAULT_VIEW_TAG);
             }
 
             final MenuView.ItemView itemView = (MenuView.ItemView) convertView;
             if (mForceShowIcon) {
-                ((ListMenuItemView) convertView).setForceShowIcon(true);
+                final ListMenuItemView listItemView = (ListMenuItemView) convertView;
+                final boolean preserveIconSpacing = ListMenuItemViewCompat.getPreserveIconSpacing(listItemView);
+                listItemView.setForceShowIcon(true);
+                ListMenuItemViewCompat.setPreserveIconSpacing(listItemView, preserveIconSpacing);
             }
             itemView.initialize(item, 0);
             return convertView;
@@ -436,6 +481,17 @@ public class CustomPopupMenuHelper implements AdapterView.OnItemClickListener, V
             findExpandedIndex();
             super.notifyDataSetChanged();
         }
+
+        public int indexOf(MenuItem item) {
+            final List<MenuItemImpl> visibleItems = mMenu.getVisibleItems();
+            for (int i = 0; i < visibleItems.size(); i++) {
+                MenuItemImpl candidate = visibleItems.get(i);
+                if (candidate == item) {
+                    return i;
+                }
+            }
+            return -1;
+        }
     }
 }
 

app/src/main/java/org/solovyev/android/widget/menu/ListMenuItemViewCompat.java

@@ -0,0 +1,53 @@
+package org.solovyev.android.widget.menu;
+
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.v7.view.menu.ListMenuItemView;
+import android.util.Log;
+
+import java.lang.reflect.Field;
+
+final class ListMenuItemViewCompat {
+
+    @Nullable
+    private static Field preserveIconSpacingField;
+
+    public static void setPreserveIconSpacing(@NonNull ListMenuItemView view, boolean preserveIconSpacing) {
+        final Field field = getPreserveIconSpacingField();
+        if (field == null) {
+            return;
+        }
+        try {
+            field.set(view, preserveIconSpacing);
+        } catch (IllegalAccessException e) {
+            Log.e("CustomListMenuItemView", e.getMessage(), e);
+        }
+    }
+
+    public static boolean getPreserveIconSpacing(@NonNull ListMenuItemView view) {
+        final Field field = getPreserveIconSpacingField();
+        if (field == null) {
+            return false;
+        }
+        try {
+            return field.getBoolean(view);
+        } catch (IllegalAccessException e) {
+            Log.e("CustomListMenuItemView", e.getMessage(), e);
+            return false;
+        }
+    }
+
+    @Nullable
+    private static Field getPreserveIconSpacingField() {
+        if (preserveIconSpacingField != null) {
+            return preserveIconSpacingField;
+        }
+        try {
+            preserveIconSpacingField = ListMenuItemView.class.getDeclaredField("mPreserveIconSpacing");
+            preserveIconSpacingField.setAccessible(true);
+            return preserveIconSpacingField;
+        } catch (NoSuchFieldException e) {
+            return null;
+        }
+    }
+}

app/src/main/java/org/solovyev/android/widget/menu/MenuItemDivider.java

@@ -0,0 +1,102 @@
+package org.solovyev.android.widget.menu;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.content.res.TypedArray;
+import android.graphics.drawable.Drawable;
+import android.os.Build;
+import android.support.annotation.Nullable;
+import android.support.v7.view.menu.MenuItemImpl;
+import android.support.v7.view.menu.MenuView;
+import android.util.AttributeSet;
+import android.view.View;
+
+@SuppressWarnings("unused")
+public class MenuItemDivider extends View implements MenuView.ItemView {
+
+    private static final int[] ATTRS = new int[]{android.R.attr.listDivider};
+
+    public MenuItemDivider(Context context) {
+        super(context);
+    }
+
+    public MenuItemDivider(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public MenuItemDivider(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    public MenuItemDivider(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    @Override
+    public void initialize(MenuItemImpl itemData, int menuType) {
+        final Drawable divider = getDivider();
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
+            setBackground(divider);
+        } else {
+            //noinspection deprecation
+            setBackgroundDrawable(divider);
+        }
+        setEnabled(false);
+    }
+
+    @Nullable
+    private Drawable getDivider() {
+        final TypedArray a = getContext().obtainStyledAttributes(ATTRS);
+        try {
+            return a.getDrawable(0);
+        } finally {
+            a.recycle();
+        }
+    }
+
+    @Override
+    public MenuItemImpl getItemData() {
+        return null;
+    }
+
+    @Override
+    public void setTitle(CharSequence title) {
+
+    }
+
+    @Override
+    public void setEnabled(boolean enabled) {
+
+    }
+
+    @Override
+    public void setCheckable(boolean checkable) {
+
+    }
+
+    @Override
+    public void setChecked(boolean checked) {
+
+    }
+
+    @Override
+    public void setShortcut(boolean showShortcut, char shortcutKey) {
+
+    }
+
+    @Override
+    public void setIcon(Drawable icon) {
+
+    }
+
+    @Override
+    public boolean prefersCondensedTitle() {
+        return false;
+    }
+
+    @Override
+    public boolean showsIcon() {
+        return false;
+    }
+}

app/src/main/res/drawable/ic_chevron_left_24dp.xml

@@ -0,0 +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">
+    <path
+        android:fillColor="#ffffff"
+        android:pathData="M15.41,7.41L14,6l-6,6 6,6 1.41,-1.41L10.83,12z"/>
+</vector>

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

@@ -1,22 +1,35 @@
 <?xml version="1.0" encoding="utf-8"?>
-<LinearLayout xmlns:a="http://schemas.android.com/apk/res/android"
+<FrameLayout xmlns:a="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     a:layout_width="match_parent"
     a:layout_height="0dp"
     a:layout_weight="2"
-    a:orientation="horizontal"
     tools:ignore="MergeRootFrame">
 
     <FrameLayout
         a:id="@+id/editor"
-        a:layout_width="0dp"
+        a:layout_width="match_parent"
-        a:layout_height="match_parent"
+        a:layout_height="match_parent" />
-        a:layout_weight="1" />
+
+    <!-- make clickable area bigger -->
+    <FrameLayout
+        a:id="@+id/main_menu"
+        style="?attr/actionOverflowButtonStyle"
+        a:layout_width="40dp"
+        a:paddingLeft="0dp"
+        a:paddingRight="0dp"
+        a:layout_height="?attr/actionBarSize"
+        a:layout_gravity="top|end">
 
         <ImageButton
             style="?attr/actionOverflowButtonStyle"
-        a:id="@+id/main_menu"
+            a:paddingLeft="0dp"
-        a:layout_width="wrap_content"
+            a:paddingRight="0dp"
-        a:layout_height="?actionBarSize"
+            a:layout_width="20dp"
+            a:layout_height="36dp"
+            a:clickable="false"
+            a:focusable="false"
+            a:focusableInTouchMode="false"
             a:layout_gravity="top|end" />
-</LinearLayout>
+    </FrameLayout>
+</FrameLayout>

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

@@ -26,9 +26,4 @@
     android:id="@id/cpp_button_copy"
     style="?attr/cpp_button_style_control"
     xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:src="@drawable/ic_content_copy_white_48dp" />
-    android:src="@drawable/ic_content_copy_white_48dp"
-    app:directionTextScale="@dimen/cpp_direction_text_scale_units"
-    app:directionTextDown="bin"
-    app:directionTextLeft="hex"
-    app:directionTextUp="dec"/>

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

@@ -26,8 +26,4 @@
     android:id="@id/cpp_button_paste"
     style="?attr/cpp_button_style_control"
     xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:src="@drawable/ic_content_paste_white_48dp" />
-    app:directionTextScale="@dimen/cpp_direction_text_scale_units"
-    android:src="@drawable/ic_content_paste_white_48dp"
-    app:directionTextDown="rad"
-    app:directionTextUp="deg"/>

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

@@ -24,4 +24,6 @@
 <org.solovyev.android.calculator.EditorView
     a:id="@+id/calculator_editor"
     style="@style/CppText.Editor"
-    xmlns:a="http://schemas.android.com/apk/res/android"/>
+    xmlns:a="http://schemas.android.com/apk/res/android"
+    a:layout_marginEnd="16dp"
+    a:layout_marginRight="16dp" />

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

@@ -6,7 +6,7 @@
   ~ or visit http://se.solovyev.org
   -->
 
-<org.solovyev.android.calculator.DisplayView a:id="@+id/calculator_display"
+<org.solovyev.android.calculator.DisplayView
+    a:id="@+id/calculator_display"
     style="@style/CppText.Display.Onscreen"
-    xmlns:a="http://schemas.android.com/apk/res/android"
+    xmlns:a="http://schemas.android.com/apk/res/android" />
-    a:padding="@dimen/cpp_display_padding" />

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

@@ -6,7 +6,7 @@
   ~ or visit http://se.solovyev.org
   -->
 
-<org.solovyev.android.calculator.DisplayView a:id="@+id/calculator_display"
+<org.solovyev.android.calculator.DisplayView
+    a:id="@+id/calculator_display"
     style="@style/CppText.Display.Onscreen.Light"
-    xmlns:a="http://schemas.android.com/apk/res/android"
+    xmlns:a="http://schemas.android.com/apk/res/android" />
-    a:padding="@dimen/cpp_display_padding" />

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

@@ -6,10 +6,8 @@
   ~ or visit http://se.solovyev.org
   -->
 
-<TextView
+<TextView a:id="@+id/calculator_display"
-    xmlns:a="http://schemas.android.com/apk/res/android"
-    a:id="@+id/calculator_display"
     style="@style/CppText.Display.Widget"
-    a:padding="@dimen/cpp_display_padding"
+    xmlns:a="http://schemas.android.com/apk/res/android"
     a:scrollbars="vertical"
     a:textIsSelectable="true" />

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

@@ -6,10 +6,8 @@
   ~ or visit http://se.solovyev.org
   -->
 
-<TextView
+<TextView a:id="@+id/calculator_display"
-    xmlns:a="http://schemas.android.com/apk/res/android"
-    a:id="@+id/calculator_display"
     style="@style/CppText.Display.Widget.Light"
-    a:padding="@dimen/cpp_display_padding"
+    xmlns:a="http://schemas.android.com/apk/res/android"
     a:scrollbars="vertical"
     a:textIsSelectable="true" />

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

@@ -38,7 +38,6 @@
             a:layout_width="0dp"
             a:layout_height="wrap_content"
             a:layout_weight="2"
-            a:padding="@dimen/cpp_display_padding"
             a:scrollbars="vertical"
             a:textIsSelectable="true"
             a:textSize="@dimen/cpp_widget_display_text_size_collapsed" />

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

@@ -5,7 +5,75 @@
     <item
         android:id="@+id/menu_mode"
         android:title="@string/cpp_mode"
-        app:actionProviderClass="org.solovyev.android.calculator.MainMenu$ViewProvider"
+        app:showAsAction="never">
+        <menu>
+            <item
+                android:icon="@drawable/ic_chevron_left_24dp"
+                android:title="@string/cpp_mode"
+                app:showAsAction="never" />
+            <item
+                android:title=""
+                app:actionViewClass="org.solovyev.android.widget.menu.MenuItemDivider"
+                app:showAsAction="never" />
+            <item
+                android:id="@+id/menu_mode_engineer"
+                android:title="@string/cpp_wizard_mode_engineer" />
+            <item
+                android:id="@+id/menu_mode_simple"
+                android:title="@string/cpp_wizard_mode_simple" />
+        </menu>
+    </item>
+
+    <item
+        android:id="@+id/menu_angle_units"
+        android:title="@string/cpp_angles"
+        app:showAsAction="never">
+        <menu>
+            <item
+                android:icon="@drawable/ic_chevron_left_24dp"
+                android:title="@string/cpp_angles"
+                app:showAsAction="never" />
+            <item
+                android:title=""
+                app:actionViewClass="org.solovyev.android.widget.menu.MenuItemDivider"
+                app:showAsAction="never" />
+            <item
+                android:id="@+id/menu_au_deg"
+                android:title="@string/p_deg" />
+            <item
+                android:id="@+id/menu_au_rad"
+                android:title="@string/p_rad" />
+        </menu>
+    </item>
+
+    <item
+        android:id="@+id/menu_numeral_base"
+        android:title="@string/cpp_radix"
+        app:showAsAction="never">
+        <menu>
+            <item
+                android:icon="@drawable/ic_chevron_left_24dp"
+                android:title="@string/cpp_radix"
+                app:showAsAction="never" />
+            <item
+                android:title=""
+                app:actionViewClass="org.solovyev.android.widget.menu.MenuItemDivider"
+                app:showAsAction="never" />
+            <item
+                android:id="@+id/menu_nb_bin"
+                android:title="@string/p_bin" />
+            <item
+                android:id="@+id/menu_nb_dec"
+                android:title="@string/p_dec" />
+            <item
+                android:id="@+id/menu_nb_hex"
+                android:title="@string/p_hex" />
+        </menu>
+    </item>
+
+    <item
+        android:title=""
+        app:actionViewClass="org.solovyev.android.widget.menu.MenuItemDivider"
         app:showAsAction="never" />
 
     <item

app/src/main/res/values-ru/text_strings.xml

@@ -143,4 +143,6 @@
   <string name="cpp_fn_parameter">Параметр</string>
   <string name="cpp_fn_duplicate_parameter">Параметр с таким именем уже существует</string>
   <string name="cpp_invalid_name">Имя содержит недопустимые символы</string>
+    <string name="cpp_angles">Углы</string>
+    <string name="cpp_radix">Система</string>
 </resources>

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

@@ -24,9 +24,6 @@
     <dimen name="cpp_onscreen_display_text_size">20sp</dimen>
     <dimen name="cpp_onscreen_header_button_text_size">10dp</dimen>
 
-    <!--only for not multipane-->
-    <dimen name="cpp_editor_padding">5dp</dimen>
-    <dimen name="cpp_display_padding">3dp</dimen>
     <dimen name="cpp_display_padding_side">10dp</dimen>
 
     <dimen name="cpp_widget_keyboard_button_text_size">20dp</dimen>

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

@@ -67,7 +67,10 @@
         <item name="android:textColor">?attr/cpp_text_color</item>
         <item name="android:inputType">textMultiLine|textNoSuggestions</item>
         <item name="android:scrollbars">vertical</item>
-        <item name="android:padding">@dimen/cpp_editor_padding</item>
+        <item name="android:paddingRight">3dp</item>
+        <item name="android:paddingLeft">3dp</item>
+        <item name="android:paddingTop">3dp</item>
+        <item name="android:paddingBottom">3dp</item>
     </style>
 
     <style name="CppText.Display" parent="CppText">
@@ -78,10 +81,10 @@
         <item name="android:textSize">@dimen/cpp_display_text_size</item>
         <item name="android:scrollHorizontally">false</item>
         <item name="android:scrollbars">none</item>
-        <item name="android:paddingRight">@dimen/cpp_display_padding</item>
+        <item name="android:paddingRight">3dp</item>
-        <item name="android:paddingLeft">@dimen/cpp_display_padding</item>
+        <item name="android:paddingLeft">3dp</item>
-        <item name="android:paddingTop">@dimen/cpp_display_padding</item>
+        <item name="android:paddingTop">3dp</item>
-        <item name="android:paddingBottom">@dimen/cpp_display_padding</item>
+        <item name="android:paddingBottom">3dp</item>
     </style>
 
     <style name="CppImageButton">

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

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <string name="cpp_kb_variables" translatable="false">π…</string>
+    <string name="cpp_kb_variables" translatable="false">π</string>
     <string name="cpp_kb_functions" translatable="false">ƒ</string>
     <string name="cpp_kb_operators" translatable="false">∂</string>
     <string name="cpp_kb_undo" translatable="false">↶</string>

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

@@ -122,4 +122,6 @@
     <string name="cpp_new_in_version">New in %1$s version</string>
     <string name="cpp_release_notes_choose_theme">Do you want to try new Material themes? Choose them from the list:</string>
     <string name="cpp_system_language">System language</string>
+    <string name="cpp_angles">Angles</string>
+    <string name="cpp_radix">Radix</string>
 </resources>

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

@@ -41,6 +41,7 @@
         <item name="cpp_toolbar_style">@style/CppToolbar</item>
 
         <item name="android:listDivider">@drawable/divider_dark</item>
+        <item name="actionOverflowMenuStyle">@style/Cpp.Widget.AppCompat.PopupMenu.Overflow</item>
     </style>
 
     <style name="Cpp.Theme.Translucent" parent="@style/Theme.AppCompat.Dialog">
@@ -97,6 +98,7 @@
         <item name="cpp_toolbar_style">@style/CppToolbar.Light</item>
 
         <item name="android:listDivider">@drawable/divider</item>
+        <item name="actionOverflowMenuStyle">@style/Cpp.Widget.AppCompat.Light.PopupMenu.Overflow</item>
     </style>
 
     <style name="Cpp.Theme.Light.Dialog" parent="@style/Theme.AppCompat.Light.DialogWhenLarge">
@@ -147,4 +149,12 @@
         <item name="cpp_wizard_button_bg">@color/cpp_wizard_button_selector_light</item>
     </style>
 
+    <style name="Cpp.Widget.AppCompat.PopupMenu.Overflow" parent="Widget.AppCompat.PopupMenu.Overflow">
+        <item name="android:dropDownVerticalOffset">4dip</item>
+    </style>
+
+    <style name="Cpp.Widget.AppCompat.Light.PopupMenu.Overflow" parent="Widget.AppCompat.Light.PopupMenu.Overflow">
+        <item name="android:dropDownVerticalOffset">4dip</item>
+    </style>
+
 </resources>

app/src/main/res/xml/preferences_calculations.xml

@@ -50,13 +50,6 @@
         a:summary="@string/c_calc_grouping_separator_summary"
         a:title="@string/c_calc_grouping_separator" />
 
-    <ListPreference
-        a:entries="@array/p_angle_units_names"
-        a:entryValues="@array/p_angle_units"
-        a:key="preferred_angle_units"
-        a:summary="@string/p_preferred_angle_units_summary"
-        a:title="@string/p_preferred_angle_units_title" />
-
     <ListPreference
         a:entries="@array/p_angle_units_names"
         a:entryValues="@array/p_angle_units"
@@ -64,13 +57,6 @@
         a:summary="@string/c_angle_units_summary"
         a:title="@string/c_calc_angle_units" />
 
-    <ListPreference
-        a:entries="@array/p_numeral_bases_names"
-        a:entryValues="@array/p_numeral_bases"
-        a:key="preferred_numeral_base"
-        a:summary="@string/p_preferred_numeral_base_summary"
-        a:title="@string/p_preferred_numeral_base_title" />
-
     <ListPreference
         a:entries="@array/p_numeral_bases_names"
         a:entryValues="@array/p_numeral_bases"

app/src/test/java/org/solovyev/android/calculator/BaseCalculatorTest.java

@@ -26,7 +26,6 @@ public abstract class BaseCalculatorTest {
         engine = Tests.makeEngine();
         engine.variablesRegistry.bus = bus;
         calculator.engine = engine;
-        calculator.preferredPreferences = mock(PreferredPreferences.class);
         final ToJsclTextProcessor processor = new ToJsclTextProcessor();
         processor.engine = engine;
         calculator.preprocessor = processor;