holo look for pressed/focused workspace icons

Change-Id: Ia964c868afd200be3828e4397659391f857599e6

1 files changed, 128 insertions, 16 deletions

diff --git a/src/com/android/launcher2/BubbleTextView.java b/src/com/android/launcher2/BubbleTextView.java
index 995877b91..6e2a58b9e 100644
--- a/src/com/android/launcher2/BubbleTextView.java
+++ b/src/com/android/launcher2/BubbleTextView.java
@@ -16,18 +16,19 @@
 
 package com.android.launcher2;
 
+import com.android.launcher.R;
+
 import android.content.Context;
 import android.content.res.Resources;
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
-import android.graphics.RectF;
+import android.graphics.Rect;
+import android.graphics.Region.Op;
 import android.graphics.drawable.Drawable;
-import android.text.Layout;
 import android.util.AttributeSet;
-
-import com.android.launcher.R;
+import android.view.MotionEvent;
 
 /**
  * TextView that draws a bubble behind the text. We cannot use a LineBackgroundSpan
@@ -44,16 +45,23 @@ public class BubbleTextView extends CacheableTextView {
     static final float PADDING_H = 8.0f;
     static final float PADDING_V = 3.0f;
 
-    private final RectF mRect = new RectF();
     private Paint mPaint;
     private float mBubbleColorAlpha;
     private int mPrevAlpha = -1;
 
+    private final HolographicOutlineHelper mOutlineHelper = new HolographicOutlineHelper();
+    private final Canvas mTempCanvas = new Canvas();
+    private final Rect mTempRect = new Rect();
+    private final Paint mTempPaint = new Paint();
+    private boolean mDidInvalidateForPressedState;
+    private Bitmap mPressedOrFocusedBackground;
+    private int mFocusedOutlineColor;
+    private int mFocusedGlowColor;
+    private int mPressedOutlineColor;
+    private int mPressedGlowColor;
+
     private boolean mBackgroundSizeChanged;
     private Drawable mBackground;
-    private float mCornerRadius;
-    private float mPaddingH;
-    private float mPaddingV;
 
     public BubbleTextView(Context context) {
         super(context);
@@ -80,12 +88,13 @@ public class BubbleTextView extends CacheableTextView {
         mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
         mPaint.setColor(bubbleColor);
         mBubbleColorAlpha = Color.alpha(bubbleColor) / 255.0f;
-
-        final float scale = res.getDisplayMetrics().density;
-        mCornerRadius = CORNER_RADIUS * scale;
-        mPaddingH = PADDING_H * scale;
-        //noinspection PointlessArithmeticExpression
-        mPaddingV = PADDING_V * scale;
+        mFocusedOutlineColor =
+            getResources().getColor(R.color.workspace_item_focused_outline_color);
+        mFocusedGlowColor = getResources().getColor(R.color.workspace_item_focused_glow_color);
+        mPressedOutlineColor =
+            getResources().getColor(R.color.workspace_item_pressed_outline_color);
+        mPressedGlowColor =
+            getResources().getColor(R.color.workspace_item_pressed_glow_color);
     }
 
     protected int getCacheTopPadding() {
@@ -110,7 +119,6 @@ public class BubbleTextView extends CacheableTextView {
         setText(info.title);
         buildAndEnableCache();
         setTag(info);
-
     }
 
     @Override
@@ -128,6 +136,28 @@ public class BubbleTextView extends CacheableTextView {
 
     @Override
     protected void drawableStateChanged() {
+        if (isPressed()) {
+            // In this case, we have already created the pressed outline on ACTION_DOWN,
+            // so we just need to do an invalidate to trigger draw
+            if (!mDidInvalidateForPressedState) {
+                invalidate();
+            }
+        } else {
+            // Otherwise, either clear the pressed/focused background, or create a background
+            // for the focused state
+            final boolean backgroundEmptyBefore = mPressedOrFocusedBackground == null;
+            mPressedOrFocusedBackground = null;
+            if (isFocused()) {
+                mPressedOrFocusedBackground = createGlowingOutline(
+                        mTempCanvas, mFocusedGlowColor, mFocusedOutlineColor);
+                invalidate();
+            }
+            final boolean backgroundEmptyNow = mPressedOrFocusedBackground == null;
+            if (!backgroundEmptyBefore && backgroundEmptyNow) {
+                invalidate();
+            }
+        }
+
         Drawable d = mBackground;
         if (d != null && d.isStateful()) {
             d.setState(getDrawableState());
@@ -135,8 +165,91 @@ public class BubbleTextView extends CacheableTextView {
         super.drawableStateChanged();
     }
 
+    /**
+     * Draw the View v into the given Canvas.
+     *
+     * @param v the view to draw
+     * @param destCanvas the canvas to draw on
+     * @param padding the horizontal and vertical padding to use when drawing
+     */
+    private void drawWithPadding(Canvas destCanvas, int padding) {
+        final Rect clipRect = mTempRect;
+        getDrawingRect(clipRect);
+
+        // adjust the clip rect so that we don't include the text label
+        clipRect.bottom =
+            getExtendedPaddingTop() - (int) BubbleTextView.PADDING_V + getLayout().getLineTop(0);
+
+        // Draw the View into the bitmap.
+        // The translate of scrollX and scrollY is necessary when drawing TextViews, because
+        // they set scrollX and scrollY to large values to achieve centered text
+        destCanvas.save();
+        destCanvas.translate(-getScrollX() + padding / 2, -getScrollY() + padding / 2);
+        destCanvas.clipRect(clipRect, Op.REPLACE);
+        draw(destCanvas);
+        destCanvas.restore();
+    }
+
+    /**
+     * Returns a new bitmap to be used as the object outline, e.g. to visualize the drop location.
+     * Responsibility for the bitmap is transferred to the caller.
+     */
+    private Bitmap createGlowingOutline(Canvas canvas, int outlineColor, int glowColor) {
+        final int padding = HolographicOutlineHelper.MAX_OUTER_BLUR_RADIUS;
+        final Bitmap b = Bitmap.createBitmap(
+                getWidth() + padding, getHeight() + padding, Bitmap.Config.ARGB_8888);
+
+        canvas.setBitmap(b);
+        drawWithPadding(canvas, padding);
+        mOutlineHelper.applyExtraThickExpensiveOutlineWithBlur(b, canvas, glowColor, outlineColor);
+
+        return b;
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        // Call the superclass onTouchEvent first, because sometimes it changes the state to
+        // isPressed() on an ACTION_UP
+        boolean result = super.onTouchEvent(event);
+
+        switch (event.getAction()) {
+            case MotionEvent.ACTION_DOWN:
+                // So that the pressed outline is visible immediately when isPressed() is true,
+                // we pre-create it on ACTION_DOWN (it takes a small but perceptible amount of time
+                // to create it)
+                if (mPressedOrFocusedBackground == null) {
+                    mPressedOrFocusedBackground = createGlowingOutline(
+                            mTempCanvas, mPressedGlowColor, mPressedOutlineColor);
+                }
+                // Invalidate so the pressed state is visible, or set a flag so we know that we
+                // have to call invalidate as soon as the state is "pressed"
+                if (isPressed()) {
+                    mDidInvalidateForPressedState = true;
+                    invalidate();
+                } else {
+                    mDidInvalidateForPressedState = false;
+                }
+                break;
+            case MotionEvent.ACTION_CANCEL:
+            case MotionEvent.ACTION_UP:
+                // If we've touched down and up on an item, and it's still not "pressed", then
+                // destroy the pressed outline
+                if (!isPressed()) {
+                    mPressedOrFocusedBackground = null;
+                }
+                break;
+        }
+        return result;
+    }
+
     @Override
     public void draw(Canvas canvas) {
+        if (mPressedOrFocusedBackground != null && (isPressed() || isFocused())) {
+            canvas.drawBitmap(mPressedOrFocusedBackground,
+                    mScrollX - HolographicOutlineHelper.MAX_OUTER_BLUR_RADIUS / 2,
+                    mScrollY - HolographicOutlineHelper.MAX_OUTER_BLUR_RADIUS / 2,
+                    mTempPaint);
+        }
         if (isBuildingCache()) {
             // We enhance the shadow by drawing the shadow twice
             this.setShadowLayer(SHADOW_LARGE_RADIUS, 0.0f, SHADOW_Y_OFFSET, SHADOW_LARGE_COLOUR);
@@ -162,7 +275,6 @@ public class BubbleTextView extends CacheableTextView {
                     canvas.translate(-scrollX, -scrollY);
                 }
             }
-
             super.draw(canvas);
         }
     }