| /* |
| * Copyright (C) 2008 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| 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.Rect; |
| import android.graphics.Region; |
| import android.graphics.Region.Op; |
| import android.graphics.drawable.Drawable; |
| import android.util.AttributeSet; |
| import android.view.MotionEvent; |
| import android.view.View; |
| |
| /** |
| * TextView that draws a bubble behind the text. We cannot use a LineBackgroundSpan |
| * because we want to make the bubble taller than the text and TextView's clip is |
| * too aggressive. |
| */ |
| public class BubbleTextView extends CachedTextView implements VisibilityChangedBroadcaster { |
| static final float CORNER_RADIUS = 4.0f; |
| static final float SHADOW_LARGE_RADIUS = 4.0f; |
| static final float SHADOW_SMALL_RADIUS = 1.75f; |
| static final float SHADOW_Y_OFFSET = 2.0f; |
| static final int SHADOW_LARGE_COLOUR = 0xCC000000; |
| static final int SHADOW_SMALL_COLOUR = 0xBB000000; |
| static final float PADDING_H = 8.0f; |
| static final float PADDING_V = 3.0f; |
| |
| 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 VisibilityChangedListener mOnVisibilityChangedListener; |
| |
| public BubbleTextView(Context context) { |
| super(context); |
| init(); |
| } |
| |
| public BubbleTextView(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| init(); |
| } |
| |
| public BubbleTextView(Context context, AttributeSet attrs, int defStyle) { |
| super(context, attrs, defStyle); |
| init(); |
| } |
| |
| private void init() { |
| mBackground = getBackground(); |
| setFocusable(true); |
| setBackgroundDrawable(null); |
| |
| final Resources res = getContext().getResources(); |
| int bubbleColor = res.getColor(R.color.bubble_dark_background); |
| mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); |
| mPaint.setColor(bubbleColor); |
| mBubbleColorAlpha = Color.alpha(bubbleColor) / 255.0f; |
| mFocusedOutlineColor = res.getColor(R.color.workspace_item_focused_outline_color); |
| mFocusedGlowColor = res.getColor(R.color.workspace_item_focused_glow_color); |
| mPressedOutlineColor = res.getColor(R.color.workspace_item_pressed_outline_color); |
| mPressedGlowColor = res.getColor(R.color.workspace_item_pressed_glow_color); |
| } |
| |
| protected int getCacheTopPadding() { |
| return (int) PADDING_V; |
| } |
| protected int getCacheBottomPadding() { |
| return (int) (PADDING_V + SHADOW_LARGE_RADIUS + SHADOW_Y_OFFSET); |
| } |
| protected int getCacheLeftPadding() { |
| return (int) (PADDING_H + SHADOW_LARGE_RADIUS); |
| } |
| protected int getCacheRightPadding() { |
| return (int) (PADDING_H + SHADOW_LARGE_RADIUS); |
| } |
| |
| public void applyFromShortcutInfo(ShortcutInfo info, IconCache iconCache) { |
| Bitmap b = info.getIcon(iconCache); |
| |
| setCompoundDrawablesWithIntrinsicBounds(null, |
| new FastBitmapDrawable(b), |
| null, null); |
| setText(info.title); |
| setTag(info); |
| } |
| |
| @Override |
| protected boolean setFrame(int left, int top, int right, int bottom) { |
| if (mLeft != left || mRight != right || mTop != top || mBottom != bottom) { |
| mBackgroundSizeChanged = true; |
| } |
| return super.setFrame(left, top, right, bottom); |
| } |
| |
| @Override |
| protected boolean verifyDrawable(Drawable who) { |
| return who == mBackground || super.verifyDrawable(who); |
| } |
| |
| @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()); |
| } |
| 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; |
| } |
| |
| public void setVisibilityChangedListener(VisibilityChangedListener listener) { |
| mOnVisibilityChangedListener = listener; |
| } |
| |
| @Override |
| protected void onVisibilityChanged(View changedView, int visibility) { |
| if (mOnVisibilityChangedListener != null) { |
| mOnVisibilityChangedListener.receiveVisibilityChangedMessage(this); |
| } |
| super.onVisibilityChanged(changedView, visibility); |
| } |
| |
| @Override |
| public void draw(Canvas canvas) { |
| if (mPressedOrFocusedBackground != null && (isPressed() || isFocused())) { |
| // The blue glow can extend outside of our clip region, so we first temporarily expand |
| // the canvas's clip region |
| canvas.save(Canvas.CLIP_SAVE_FLAG); |
| int padding = HolographicOutlineHelper.MAX_OUTER_BLUR_RADIUS / 2; |
| canvas.clipRect(-padding + mScrollX, -padding + mScrollY, |
| getWidth() + padding + mScrollX, getHeight() + padding + mScrollY, |
| Region.Op.REPLACE); |
| // draw blue glow |
| canvas.drawBitmap(mPressedOrFocusedBackground, |
| mScrollX - padding, mScrollY - padding, mTempPaint); |
| canvas.restore(); |
| } |
| if (isBuildingCache()) { |
| // We enhance the shadow by drawing the shadow twice |
| this.setShadowLayer(SHADOW_LARGE_RADIUS, 0.0f, SHADOW_Y_OFFSET, SHADOW_LARGE_COLOUR); |
| super.draw(canvas); |
| this.setShadowLayer(SHADOW_SMALL_RADIUS, 0.0f, 0.0f, SHADOW_SMALL_COLOUR); |
| super.draw(canvas); |
| } else { |
| final Drawable background = mBackground; |
| if (background != null) { |
| final int scrollX = mScrollX; |
| final int scrollY = mScrollY; |
| |
| if (mBackgroundSizeChanged) { |
| background.setBounds(0, 0, mRight - mLeft, mBottom - mTop); |
| mBackgroundSizeChanged = false; |
| } |
| |
| if ((scrollX | scrollY) == 0) { |
| background.draw(canvas); |
| } else { |
| canvas.translate(scrollX, scrollY); |
| background.draw(canvas); |
| canvas.translate(-scrollX, -scrollY); |
| } |
| } |
| super.draw(canvas); |
| } |
| } |
| |
| @Override |
| protected void onAttachedToWindow() { |
| super.onAttachedToWindow(); |
| if (mBackground != null) mBackground.setCallback(this); |
| } |
| |
| @Override |
| protected void onDetachedFromWindow() { |
| super.onDetachedFromWindow(); |
| if (mBackground != null) mBackground.setCallback(null); |
| } |
| |
| @Override |
| protected boolean onSetAlpha(int alpha) { |
| if (mPrevAlpha != alpha) { |
| mPrevAlpha = alpha; |
| mPaint.setAlpha((int) (alpha * mBubbleColorAlpha)); |
| super.onSetAlpha(alpha); |
| } |
| return true; |
| } |
| } |