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The Android Open Source Project31dd5032009-03-03 19:32:27 -08001/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
Joe Onoratoa5902522009-07-30 13:37:37 -070017package com.android.launcher2;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080018
Michael Jurka38b4f7c2010-12-14 16:46:39 -080019import com.android.launcher.R;
20
The Android Open Source Project31dd5032009-03-03 19:32:27 -080021import android.content.Context;
Winson Chung656d11c2010-11-29 17:15:47 -080022import android.content.res.Resources;
Michael Jurka67b2f6c2010-11-17 12:33:46 -080023import android.graphics.Bitmap;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080024import android.graphics.Canvas;
Winson Chung656d11c2010-11-29 17:15:47 -080025import android.graphics.Color;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080026import android.graphics.Paint;
Michael Jurka38b4f7c2010-12-14 16:46:39 -080027import android.graphics.Rect;
28import android.graphics.Region.Op;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080029import android.graphics.drawable.Drawable;
Winson Chung656d11c2010-11-29 17:15:47 -080030import android.util.AttributeSet;
Michael Jurka38b4f7c2010-12-14 16:46:39 -080031import android.view.MotionEvent;
Romain Guyedcce092010-03-04 13:03:17 -080032
The Android Open Source Project31dd5032009-03-03 19:32:27 -080033/**
34 * TextView that draws a bubble behind the text. We cannot use a LineBackgroundSpan
35 * because we want to make the bubble taller than the text and TextView's clip is
36 * too aggressive.
37 */
Michael Jurka67b2f6c2010-11-17 12:33:46 -080038public class BubbleTextView extends CacheableTextView {
Winson Chung656d11c2010-11-29 17:15:47 -080039 static final float CORNER_RADIUS = 4.0f;
Winson Chung88127032010-12-13 12:11:33 -080040 static final float SHADOW_LARGE_RADIUS = 4.0f;
41 static final float SHADOW_SMALL_RADIUS = 1.75f;
42 static final float SHADOW_Y_OFFSET = 2.0f;
43 static final int SHADOW_LARGE_COLOUR = 0xCC000000;
44 static final int SHADOW_SMALL_COLOUR = 0xBB000000;
Winson Chung656d11c2010-11-29 17:15:47 -080045 static final float PADDING_H = 8.0f;
46 static final float PADDING_V = 3.0f;
47
The Android Open Source Project31dd5032009-03-03 19:32:27 -080048 private Paint mPaint;
Winson Chung656d11c2010-11-29 17:15:47 -080049 private float mBubbleColorAlpha;
Winson Chunge22a8e92010-11-12 13:40:58 -080050 private int mPrevAlpha = -1;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080051
Michael Jurka38b4f7c2010-12-14 16:46:39 -080052 private final HolographicOutlineHelper mOutlineHelper = new HolographicOutlineHelper();
53 private final Canvas mTempCanvas = new Canvas();
54 private final Rect mTempRect = new Rect();
55 private final Paint mTempPaint = new Paint();
56 private boolean mDidInvalidateForPressedState;
57 private Bitmap mPressedOrFocusedBackground;
58 private int mFocusedOutlineColor;
59 private int mFocusedGlowColor;
60 private int mPressedOutlineColor;
61 private int mPressedGlowColor;
62
The Android Open Source Project31dd5032009-03-03 19:32:27 -080063 private boolean mBackgroundSizeChanged;
64 private Drawable mBackground;
The Android Open Source Project31dd5032009-03-03 19:32:27 -080065
66 public BubbleTextView(Context context) {
67 super(context);
68 init();
69 }
70
71 public BubbleTextView(Context context, AttributeSet attrs) {
72 super(context, attrs);
73 init();
74 }
75
76 public BubbleTextView(Context context, AttributeSet attrs, int defStyle) {
77 super(context, attrs, defStyle);
78 init();
79 }
80
81 private void init() {
The Android Open Source Project31dd5032009-03-03 19:32:27 -080082 mBackground = getBackground();
Winson Chung656d11c2010-11-29 17:15:47 -080083 setFocusable(true);
The Android Open Source Project31dd5032009-03-03 19:32:27 -080084 setBackgroundDrawable(null);
The Android Open Source Project31dd5032009-03-03 19:32:27 -080085
Winson Chung656d11c2010-11-29 17:15:47 -080086 final Resources res = getContext().getResources();
87 int bubbleColor = res.getColor(R.color.bubble_dark_background);
The Android Open Source Project31dd5032009-03-03 19:32:27 -080088 mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
Winson Chung656d11c2010-11-29 17:15:47 -080089 mPaint.setColor(bubbleColor);
90 mBubbleColorAlpha = Color.alpha(bubbleColor) / 255.0f;
Michael Jurka38b4f7c2010-12-14 16:46:39 -080091 mFocusedOutlineColor =
92 getResources().getColor(R.color.workspace_item_focused_outline_color);
93 mFocusedGlowColor = getResources().getColor(R.color.workspace_item_focused_glow_color);
94 mPressedOutlineColor =
95 getResources().getColor(R.color.workspace_item_pressed_outline_color);
96 mPressedGlowColor =
97 getResources().getColor(R.color.workspace_item_pressed_glow_color);
The Android Open Source Project31dd5032009-03-03 19:32:27 -080098 }
99
Winson Chung88127032010-12-13 12:11:33 -0800100 protected int getCacheTopPadding() {
Winson Chung656d11c2010-11-29 17:15:47 -0800101 return (int) PADDING_V;
102 }
Winson Chung88127032010-12-13 12:11:33 -0800103 protected int getCacheBottomPadding() {
104 return (int) (PADDING_V + SHADOW_LARGE_RADIUS + SHADOW_Y_OFFSET);
105 }
106 protected int getCacheLeftPadding() {
107 return (int) (PADDING_H + SHADOW_LARGE_RADIUS);
108 }
109 protected int getCacheRightPadding() {
110 return (int) (PADDING_H + SHADOW_LARGE_RADIUS);
Winson Chung656d11c2010-11-29 17:15:47 -0800111 }
112
Michael Jurka67b2f6c2010-11-17 12:33:46 -0800113 public void applyFromShortcutInfo(ShortcutInfo info, IconCache iconCache) {
114 Bitmap b = info.getIcon(iconCache);
115
116 setCompoundDrawablesWithIntrinsicBounds(null,
117 new FastBitmapDrawable(b),
118 null, null);
119 setText(info.title);
120 buildAndEnableCache();
121 setTag(info);
Michael Jurka67b2f6c2010-11-17 12:33:46 -0800122 }
123
The Android Open Source Project31dd5032009-03-03 19:32:27 -0800124 @Override
125 protected boolean setFrame(int left, int top, int right, int bottom) {
126 if (mLeft != left || mRight != right || mTop != top || mBottom != bottom) {
127 mBackgroundSizeChanged = true;
128 }
129 return super.setFrame(left, top, right, bottom);
130 }
131
132 @Override
133 protected boolean verifyDrawable(Drawable who) {
134 return who == mBackground || super.verifyDrawable(who);
135 }
136
137 @Override
138 protected void drawableStateChanged() {
Michael Jurka38b4f7c2010-12-14 16:46:39 -0800139 if (isPressed()) {
140 // In this case, we have already created the pressed outline on ACTION_DOWN,
141 // so we just need to do an invalidate to trigger draw
142 if (!mDidInvalidateForPressedState) {
143 invalidate();
144 }
145 } else {
146 // Otherwise, either clear the pressed/focused background, or create a background
147 // for the focused state
148 final boolean backgroundEmptyBefore = mPressedOrFocusedBackground == null;
149 mPressedOrFocusedBackground = null;
150 if (isFocused()) {
151 mPressedOrFocusedBackground = createGlowingOutline(
152 mTempCanvas, mFocusedGlowColor, mFocusedOutlineColor);
153 invalidate();
154 }
155 final boolean backgroundEmptyNow = mPressedOrFocusedBackground == null;
156 if (!backgroundEmptyBefore && backgroundEmptyNow) {
157 invalidate();
158 }
159 }
160
The Android Open Source Project31dd5032009-03-03 19:32:27 -0800161 Drawable d = mBackground;
162 if (d != null && d.isStateful()) {
163 d.setState(getDrawableState());
164 }
165 super.drawableStateChanged();
166 }
167
Michael Jurka38b4f7c2010-12-14 16:46:39 -0800168 /**
169 * Draw the View v into the given Canvas.
170 *
171 * @param v the view to draw
172 * @param destCanvas the canvas to draw on
173 * @param padding the horizontal and vertical padding to use when drawing
174 */
175 private void drawWithPadding(Canvas destCanvas, int padding) {
176 final Rect clipRect = mTempRect;
177 getDrawingRect(clipRect);
178
179 // adjust the clip rect so that we don't include the text label
180 clipRect.bottom =
181 getExtendedPaddingTop() - (int) BubbleTextView.PADDING_V + getLayout().getLineTop(0);
182
183 // Draw the View into the bitmap.
184 // The translate of scrollX and scrollY is necessary when drawing TextViews, because
185 // they set scrollX and scrollY to large values to achieve centered text
186 destCanvas.save();
187 destCanvas.translate(-getScrollX() + padding / 2, -getScrollY() + padding / 2);
188 destCanvas.clipRect(clipRect, Op.REPLACE);
189 draw(destCanvas);
190 destCanvas.restore();
191 }
192
193 /**
194 * Returns a new bitmap to be used as the object outline, e.g. to visualize the drop location.
195 * Responsibility for the bitmap is transferred to the caller.
196 */
197 private Bitmap createGlowingOutline(Canvas canvas, int outlineColor, int glowColor) {
198 final int padding = HolographicOutlineHelper.MAX_OUTER_BLUR_RADIUS;
199 final Bitmap b = Bitmap.createBitmap(
200 getWidth() + padding, getHeight() + padding, Bitmap.Config.ARGB_8888);
201
202 canvas.setBitmap(b);
203 drawWithPadding(canvas, padding);
204 mOutlineHelper.applyExtraThickExpensiveOutlineWithBlur(b, canvas, glowColor, outlineColor);
205
206 return b;
207 }
208
209 @Override
210 public boolean onTouchEvent(MotionEvent event) {
211 // Call the superclass onTouchEvent first, because sometimes it changes the state to
212 // isPressed() on an ACTION_UP
213 boolean result = super.onTouchEvent(event);
214
215 switch (event.getAction()) {
216 case MotionEvent.ACTION_DOWN:
217 // So that the pressed outline is visible immediately when isPressed() is true,
218 // we pre-create it on ACTION_DOWN (it takes a small but perceptible amount of time
219 // to create it)
220 if (mPressedOrFocusedBackground == null) {
221 mPressedOrFocusedBackground = createGlowingOutline(
222 mTempCanvas, mPressedGlowColor, mPressedOutlineColor);
223 }
224 // Invalidate so the pressed state is visible, or set a flag so we know that we
225 // have to call invalidate as soon as the state is "pressed"
226 if (isPressed()) {
227 mDidInvalidateForPressedState = true;
228 invalidate();
229 } else {
230 mDidInvalidateForPressedState = false;
231 }
232 break;
233 case MotionEvent.ACTION_CANCEL:
234 case MotionEvent.ACTION_UP:
235 // If we've touched down and up on an item, and it's still not "pressed", then
236 // destroy the pressed outline
237 if (!isPressed()) {
238 mPressedOrFocusedBackground = null;
239 }
240 break;
241 }
242 return result;
243 }
244
The Android Open Source Project31dd5032009-03-03 19:32:27 -0800245 @Override
246 public void draw(Canvas canvas) {
Michael Jurka38b4f7c2010-12-14 16:46:39 -0800247 if (mPressedOrFocusedBackground != null && (isPressed() || isFocused())) {
248 canvas.drawBitmap(mPressedOrFocusedBackground,
249 mScrollX - HolographicOutlineHelper.MAX_OUTER_BLUR_RADIUS / 2,
250 mScrollY - HolographicOutlineHelper.MAX_OUTER_BLUR_RADIUS / 2,
251 mTempPaint);
252 }
Winson Chung88127032010-12-13 12:11:33 -0800253 if (isBuildingCache()) {
254 // We enhance the shadow by drawing the shadow twice
255 this.setShadowLayer(SHADOW_LARGE_RADIUS, 0.0f, SHADOW_Y_OFFSET, SHADOW_LARGE_COLOUR);
256 super.draw(canvas);
257 this.setShadowLayer(SHADOW_SMALL_RADIUS, 0.0f, 0.0f, SHADOW_SMALL_COLOUR);
258 super.draw(canvas);
259 } else {
260 final Drawable background = mBackground;
261 if (background != null) {
262 final int scrollX = mScrollX;
263 final int scrollY = mScrollY;
The Android Open Source Project31dd5032009-03-03 19:32:27 -0800264
Winson Chung88127032010-12-13 12:11:33 -0800265 if (mBackgroundSizeChanged) {
266 background.setBounds(0, 0, mRight - mLeft, mBottom - mTop);
267 mBackgroundSizeChanged = false;
268 }
269
270 if ((scrollX | scrollY) == 0) {
271 background.draw(canvas);
272 } else {
273 canvas.translate(scrollX, scrollY);
274 background.draw(canvas);
275 canvas.translate(-scrollX, -scrollY);
276 }
The Android Open Source Project31dd5032009-03-03 19:32:27 -0800277 }
Winson Chung88127032010-12-13 12:11:33 -0800278 super.draw(canvas);
The Android Open Source Project31dd5032009-03-03 19:32:27 -0800279 }
The Android Open Source Project31dd5032009-03-03 19:32:27 -0800280 }
Joe Onorato9c1289c2009-08-17 11:03:03 -0400281
282 @Override
283 protected void onAttachedToWindow() {
284 super.onAttachedToWindow();
Winson Chung656d11c2010-11-29 17:15:47 -0800285 if (mBackground != null) mBackground.setCallback(this);
Joe Onorato9c1289c2009-08-17 11:03:03 -0400286 }
287
288 @Override
289 protected void onDetachedFromWindow() {
290 super.onDetachedFromWindow();
Winson Chung656d11c2010-11-29 17:15:47 -0800291 if (mBackground != null) mBackground.setCallback(null);
Joe Onorato9c1289c2009-08-17 11:03:03 -0400292 }
Winson Chungaffd7b42010-08-20 15:11:56 -0700293
294 @Override
295 protected boolean onSetAlpha(int alpha) {
Winson Chunge22a8e92010-11-12 13:40:58 -0800296 if (mPrevAlpha != alpha) {
297 mPrevAlpha = alpha;
Winson Chung656d11c2010-11-29 17:15:47 -0800298 mPaint.setAlpha((int) (alpha * mBubbleColorAlpha));
Winson Chunge22a8e92010-11-12 13:40:58 -0800299 super.onSetAlpha(alpha);
300 }
301 return true;
Winson Chungaffd7b42010-08-20 15:11:56 -0700302 }
The Android Open Source Project31dd5032009-03-03 19:32:27 -0800303}