DirectionDragImageButton

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

@@ -12,33 +12,18 @@ import android.util.TypedValue;
 import android.view.View;
 import android.widget.ImageView;
 import android.widget.TextView;
-
-import org.solovyev.android.calculator.ActivityLauncher;
-import org.solovyev.android.calculator.App;
-import org.solovyev.android.calculator.BaseActivity;
-import org.solovyev.android.calculator.Calculator;
-import org.solovyev.android.calculator.Editor;
-import org.solovyev.android.calculator.Keyboard;
-import org.solovyev.android.calculator.Preferences;
-import org.solovyev.android.calculator.PreferredPreferences;
+import org.solovyev.android.calculator.*;
 import org.solovyev.android.calculator.buttons.CppSpecialButton;
 import org.solovyev.android.views.Adjuster;
-import org.solovyev.android.views.dragbutton.DirectionDragButton;
-import org.solovyev.android.views.dragbutton.DirectionDragListener;
-import org.solovyev.android.views.dragbutton.DragButton;
-import org.solovyev.android.views.dragbutton.DragDirection;
-import org.solovyev.android.views.dragbutton.DragEvent;
-
-import java.util.ArrayList;
-import java.util.List;
+import org.solovyev.android.views.dragbutton.*;
 
 import javax.annotation.Nonnull;
 import javax.inject.Inject;
+import java.util.ArrayList;
+import java.util.List;
 
 import static android.content.res.Configuration.ORIENTATION_PORTRAIT;
-import static android.view.HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING;
-import static android.view.HapticFeedbackConstants.FLAG_IGNORE_VIEW_SETTING;
-import static android.view.HapticFeedbackConstants.KEYBOARD_TAP;
+import static android.view.HapticFeedbackConstants.*;
 import static org.solovyev.android.calculator.App.cast;
 import static org.solovyev.android.calculator.Preferences.Gui.Layout.simple;
 import static org.solovyev.android.calculator.Preferences.Gui.Layout.simple_mobile;
@@ -53,7 +38,7 @@ public abstract class BaseKeyboardUi implements SharedPreferences.OnSharedPrefer
     public static final float IMAGE_SCALE_ERASE = 0.4f;
 
     @NonNull
-    private final List<DragButton> dragButtons = new ArrayList<>();
+    private final List<DragView> dragButtons = new ArrayList<>();
     @NonNull
     protected final DirectionDragListener listener;
     @Inject
@@ -125,6 +110,17 @@ public abstract class BaseKeyboardUi implements SharedPreferences.OnSharedPrefer
         button.setOnClickListener(this);
     }
 
+    protected final void prepareButton(@Nullable DirectionDragImageButton button) {
+        if (button == null) {
+            return;
+        }
+        dragButtons.add(button);
+        button.setVibrateOnDrag(keyboard.isVibrateOnKeypress());
+        prepareButton((ImageView) button);
+        button.setOnDragListener(listener);
+        button.setTypeface(typeface);
+    }
+
     protected final void prepareButton(@Nullable DirectionDragButton button) {
         if (button == null) {
             return;
@@ -173,7 +169,7 @@ public abstract class BaseKeyboardUi implements SharedPreferences.OnSharedPrefer
     public void onSharedPreferenceChanged(SharedPreferences preferences, String key) {
         if (Preferences.Gui.vibrateOnKeypress.isSameKey(key)) {
             final boolean vibrate = Preferences.Gui.vibrateOnKeypress.getPreference(preferences);
-            for (DragButton dragButton : dragButtons) {
+            for (DragView dragButton : dragButtons) {
                 dragButton.setVibrateOnDrag(vibrate);
             }
         }

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

@@ -10,7 +10,10 @@ 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 org.solovyev.android.calculator.ActivityLauncher;
 import org.solovyev.android.calculator.Engine;
 import org.solovyev.android.calculator.R;
@@ -18,23 +21,15 @@ 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.views.dragbutton.DirectionDragButton;
+import org.solovyev.android.views.dragbutton.DirectionDragImageButton;
 import org.solovyev.android.views.dragbutton.DragButton;
 import org.solovyev.android.views.dragbutton.DragDirection;
 
 import javax.annotation.Nonnull;
 import javax.inject.Inject;
 
-import butterknife.Bind;
-import butterknife.ButterKnife;
-import jscl.AngleUnit;
-import jscl.NumeralBase;
-
-import static org.solovyev.android.calculator.Engine.Preferences.angleUnit;
-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.down;
-import static org.solovyev.android.views.dragbutton.DragDirection.left;
-import static org.solovyev.android.views.dragbutton.DragDirection.up;
+import static org.solovyev.android.calculator.Engine.Preferences.*;
+import static org.solovyev.android.views.dragbutton.DragDirection.*;
 
 public class KeyboardUi extends BaseKeyboardUi {
 
@@ -74,7 +69,7 @@ public class KeyboardUi extends BaseKeyboardUi {
     @Bind(R.id.cpp_button_functions)
     DirectionDragButton functionsButton;
     @Bind(R.id.cpp_button_history)
-    DirectionDragButton historyButton;
+    DirectionDragImageButton historyButton;
     @Bind(R.id.cpp_button_multiplication)
     DirectionDragButton multiplicationButton;
     @Bind(R.id.cpp_button_plus)

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

@@ -0,0 +1,63 @@
+package org.solovyev.android.views.dragbutton;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Typeface;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.text.TextPaint;
+import android.util.AttributeSet;
+import android.widget.TextView;
+
+import javax.annotation.Nonnull;
+
+public class DirectionDragImageButton extends DragImageButton {
+    private final DirectionTextView textView = new DirectionTextView();
+    private final TextPaint baseTextPaint = new TextPaint();
+
+    public DirectionDragImageButton(Context context) {
+        super(context);
+        init(null);
+    }
+
+    public DirectionDragImageButton(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init(attrs);
+    }
+
+    public DirectionDragImageButton(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        init(attrs);
+    }
+
+    public DirectionDragImageButton(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+        init(attrs);
+    }
+
+    private void init(@Nullable AttributeSet attrs) {
+        final TextView view = new TextView(getContext(), attrs);
+        baseTextPaint.set(view.getPaint());
+        textView.init(this, attrs, baseTextPaint);
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        super.onDraw(canvas);
+        textView.draw(canvas);
+    }
+
+    @Nonnull
+    protected DirectionTextView.Text getText(@NonNull DragDirection direction) {
+        return textView.getText(direction);
+    }
+
+    public void setTypeface(@Nonnull Typeface newTypeface) {
+        final Typeface oldTypeface = baseTextPaint.getTypeface();
+        if(oldTypeface == newTypeface) {
+            return;
+        }
+        baseTextPaint.setTypeface(newTypeface);
+        textView.setBaseTextPaint(baseTextPaint);
+    }
+}

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

@@ -12,9 +12,7 @@ import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.view.View;
 import android.widget.TextView;
-
 import com.google.common.base.Strings;
-
 import org.solovyev.android.Check;
 import org.solovyev.android.calculator.R;
 
@@ -178,25 +176,32 @@ public class DirectionTextView {
 
         private void calculatePosition() {
             paint.getTextBounds(value, 0, value.length(), bounds);
+
+            final int paddingLeft = padding;
+            final int paddingRight = padding;
+            final int paddingTop = padding;
+            final int paddingBottom = padding;
+            final int verticalPaddings = 0;
+
             switch (direction) {
                 case up:
                 case down:
-                    position.x = view.getWidth() - view.getPaddingLeft() - padding - bounds.width();
+                    position.x = view.getWidth() - paddingLeft - bounds.width();
                     if (direction == DragDirection.up) {
-                        position.y = view.getPaddingTop() + padding + bounds.height();
+                        position.y = paddingTop + bounds.height();
                     } else {
-                        position.y = view.getHeight() - view.getPaddingBottom() - padding;
+                        position.y = view.getHeight() - paddingBottom;
                     }
                     break;
                 case left:
                 case right:
                     if (direction == DragDirection.left) {
-                        position.x = view.getPaddingLeft() + padding;
+                        position.x = paddingLeft;
                     } else {
-                        position.x = view.getWidth() - view.getPaddingLeft() - padding - bounds.width();
+                        position.x = view.getWidth() - paddingRight - bounds.width();
                     }
-                    final int availableHeight = view.getHeight() - view.getPaddingTop() - view.getPaddingBottom();
-                    position.y = view.getPaddingTop() + padding + availableHeight / 2 + bounds.height() / 2;
+                    final int availableHeight = view.getHeight() - verticalPaddings;
+                    position.y = paddingTop + availableHeight / 2 + bounds.height() / 2;
                     break;
             }
         }

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

@@ -9,7 +9,7 @@ import android.util.AttributeSet;
 import android.view.MotionEvent;
 import android.widget.Button;
 
-public class DragButton extends Button {
+public class DragButton extends Button implements DragView {
     @NonNull
     private final DragGestureDetector dragDetector = new DragGestureDetector(this);
 
@@ -41,10 +41,12 @@ public class DragButton extends Button {
         return super.onTouchEvent(event);
     }
 
+    @Override
     public void setOnDragListener(@Nullable DragListener listener) {
         dragDetector.setListener(listener);
     }
 
+    @Override
     public void setVibrateOnDrag(boolean vibrateOnDrag) {
         dragDetector.setVibrateOnDrag(vibrateOnDrag);
     }

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

@@ -0,0 +1,52 @@
+package org.solovyev.android.views.dragbutton;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.os.Build;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.util.AttributeSet;
+import android.view.MotionEvent;
+import android.widget.ImageButton;
+
+public class DragImageButton extends ImageButton implements DragView {
+    @NonNull
+    private final DragGestureDetector dragDetector = new DragGestureDetector(this);
+
+    public DragImageButton(Context context) {
+        super(context);
+    }
+
+    public DragImageButton(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public DragImageButton(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    public DragImageButton(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        if (dragDetector.onTouchEvent(event)) {
+            final MotionEvent cancelEvent = DragGestureDetector.makeCancelEvent(event);
+            super.onTouchEvent(cancelEvent);
+            cancelEvent.recycle();
+            return true;
+        }
+        return super.onTouchEvent(event);
+    }
+
+    public void setOnDragListener(@Nullable DragListener listener) {
+        dragDetector.setListener(listener);
+    }
+
+    public void setVibrateOnDrag(boolean vibrateOnDrag) {
+        dragDetector.setVibrateOnDrag(vibrateOnDrag);
+    }
+}

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

@@ -0,0 +1,9 @@
+package org.solovyev.android.views.dragbutton;
+
+import android.support.annotation.Nullable;
+
+public interface DragView {
+    void setOnDragListener(@Nullable DragListener listener);
+
+    void setVibrateOnDrag(boolean vibrateOnDrag);
+}

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

@@ -21,12 +21,11 @@
   ~ Email: se.solovyev@gmail.com
   ~ Site:  http://se.solovyev.org
   -->
-<org.solovyev.android.views.dragbutton.DirectionDragButton
+<org.solovyev.android.views.dragbutton.DirectionDragImageButton
     xmlns:a="http://schemas.android.com/apk/res/android"
-    xmlns:c="http://schemas.android.com/apk/res-auto"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     a:id="@id/cpp_button_history"
     style="?attr/cpp_button_style_control"
-    a:text="@string/c_history_button"
-    a:textStyle="bold"
-    c:directionTextDown="@string/cpp_kb_redo"
-    c:directionTextUp="@string/cpp_kb_undo" />
+    a:src="@drawable/ic_history_white_48dp"
+    app:directionTextDown="@string/cpp_kb_redo"
+    app:directionTextUp="@string/cpp_kb_undo" />