Chih-Chung Chang | 6b27050 | 2009-04-29 11:57:06 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2009 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 | |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 17 | package com.android.camera; |
| 18 | |
Owen Lin | deb5725 | 2009-05-27 14:55:45 -0700 | [diff] [blame] | 19 | import static com.android.camera.Util.Assert; |
| 20 | |
Chih-Chung Chang | ab8c77f | 2009-07-28 18:41:23 +0800 | [diff] [blame] | 21 | import android.app.Activity; |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 22 | import android.content.Context; |
| 23 | import android.graphics.Bitmap; |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 24 | import android.graphics.Canvas; |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 25 | import android.graphics.Paint; |
| 26 | import android.graphics.Rect; |
| 27 | import android.graphics.drawable.Drawable; |
Wu-cheng Li | b066347 | 2009-08-12 11:36:49 +0800 | [diff] [blame] | 28 | import android.media.AudioManager; |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 29 | import android.os.Handler; |
| 30 | import android.util.AttributeSet; |
Chih-Chung Chang | ab8c77f | 2009-07-28 18:41:23 +0800 | [diff] [blame] | 31 | import android.util.DisplayMetrics; |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 32 | import android.view.GestureDetector; |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 33 | import android.view.KeyEvent; |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 34 | import android.view.MotionEvent; |
| 35 | import android.view.View; |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 36 | import android.view.ViewConfiguration; |
Owen Lin | 0e27f8d | 2009-04-29 01:11:45 -0700 | [diff] [blame] | 37 | import android.view.GestureDetector.SimpleOnGestureListener; |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 38 | import android.widget.Scroller; |
| 39 | |
Owen Lin | e594b19 | 2009-08-13 18:04:45 +0800 | [diff] [blame] | 40 | import com.android.camera.gallery.IImage; |
| 41 | import com.android.camera.gallery.IImageList; |
| 42 | |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 43 | import java.util.HashMap; |
| 44 | |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 45 | class GridViewSpecial extends View { |
Owen Lin | deb5725 | 2009-05-27 14:55:45 -0700 | [diff] [blame] | 46 | @SuppressWarnings("unused") |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 47 | private static final String TAG = "GridViewSpecial"; |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 48 | private static final float MAX_FLING_VELOCITY = 2500; |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 49 | |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 50 | public static interface Listener { |
Owen Lin | 0e27f8d | 2009-04-29 01:11:45 -0700 | [diff] [blame] | 51 | public void onImageClicked(int index); |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 52 | public void onImageTapped(int index); |
Owen Lin | 0e27f8d | 2009-04-29 01:11:45 -0700 | [diff] [blame] | 53 | public void onLayoutComplete(boolean changed); |
| 54 | |
| 55 | /** |
| 56 | * Invoked when the <code>GridViewSpecial</code> scrolls. |
| 57 | * |
| 58 | * @param scrollPosition the position of the scroller in the range |
Chih-Chung Chang | 724e9b3 | 2009-05-19 14:35:15 +0800 | [diff] [blame] | 59 | * [0, 1], when 0 means on the top and 1 means on the buttom |
Owen Lin | 0e27f8d | 2009-04-29 01:11:45 -0700 | [diff] [blame] | 60 | */ |
| 61 | public void onScroll(float scrollPosition); |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 62 | } |
| 63 | |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 64 | public static interface DrawAdapter { |
| 65 | public void drawImage(Canvas canvas, IImage image, |
| 66 | Bitmap b, int xPos, int yPos, int w, int h); |
Chih-Chung Chang | cb4b88e | 2009-07-07 20:01:55 +0800 | [diff] [blame] | 67 | public void drawDecoration(Canvas canvas, IImage image, |
| 68 | int xPos, int yPos, int w, int h); |
| 69 | public boolean needsDecoration(); |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 70 | } |
| 71 | |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 72 | public static final int INDEX_NONE = -1; |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 73 | |
| 74 | // There are two cell size we will use. It can be set by setSizeChoice(). |
Chih-Chung Chang | 3343507 | 2009-05-14 12:36:58 +0800 | [diff] [blame] | 75 | // The mLeftEdgePadding fields is filled in onLayout(). See the comments |
| 76 | // in onLayout() for details. |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 77 | static class LayoutSpec { |
Chih-Chung Chang | ab8c77f | 2009-07-28 18:41:23 +0800 | [diff] [blame] | 78 | LayoutSpec(int w, int h, int intercellSpacing, int leftEdgePadding, |
| 79 | DisplayMetrics metrics) { |
| 80 | mCellWidth = dpToPx(w, metrics); |
| 81 | mCellHeight = dpToPx(h, metrics); |
| 82 | mCellSpacing = dpToPx(intercellSpacing, metrics); |
| 83 | mLeftEdgePadding = dpToPx(leftEdgePadding, metrics); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 84 | } |
| 85 | int mCellWidth, mCellHeight; |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 86 | int mCellSpacing; |
Chih-Chung Chang | 3343507 | 2009-05-14 12:36:58 +0800 | [diff] [blame] | 87 | int mLeftEdgePadding; |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 88 | } |
| 89 | |
Chih-Chung Chang | ab8c77f | 2009-07-28 18:41:23 +0800 | [diff] [blame] | 90 | private LayoutSpec [] mCellSizeChoices; |
| 91 | |
| 92 | private void initCellSize() { |
| 93 | Activity a = (Activity) getContext(); |
| 94 | DisplayMetrics metrics = new DisplayMetrics(); |
| 95 | a.getWindowManager().getDefaultDisplay().getMetrics(metrics); |
| 96 | mCellSizeChoices = new LayoutSpec[] { |
| 97 | new LayoutSpec(67, 67, 8, 0, metrics), |
| 98 | new LayoutSpec(92, 92, 8, 0, metrics), |
| 99 | }; |
| 100 | } |
| 101 | |
| 102 | // Converts dp to pixel. |
| 103 | private static int dpToPx(int dp, DisplayMetrics metrics) { |
| 104 | return (int) (metrics.density * dp); |
| 105 | } |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 106 | |
| 107 | // These are set in init(). |
Owen Lin | 77e110b | 2009-05-12 19:10:57 -0700 | [diff] [blame] | 108 | private final Handler mHandler = new Handler(); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 109 | private GestureDetector mGestureDetector; |
| 110 | private ImageBlockManager mImageBlockManager; |
| 111 | |
| 112 | // These are set in set*() functions. |
| 113 | private ImageLoader mLoader; |
| 114 | private Listener mListener = null; |
| 115 | private DrawAdapter mDrawAdapter = null; |
Chih-Chung Chang | f5bf8ca | 2009-08-25 18:28:29 +0800 | [diff] [blame] | 116 | private IImageList mAllImages = ImageManager.makeEmptyImageList(); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 117 | private int mSizeChoice = 1; // default is big cell size |
| 118 | |
| 119 | // These are set in onLayout(). |
| 120 | private LayoutSpec mSpec; |
| 121 | private int mColumns; |
| 122 | private int mMaxScrollY; |
| 123 | |
| 124 | // We can handle events only if onLayout() is completed. |
| 125 | private boolean mLayoutComplete = false; |
| 126 | |
| 127 | // Selection state |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 128 | private int mCurrentSelection = INDEX_NONE; |
| 129 | private int mCurrentPressState = 0; |
| 130 | private static final int TAPPING_FLAG = 1; |
| 131 | private static final int CLICKING_FLAG = 2; |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 132 | |
| 133 | // These are cached derived information. |
| 134 | private int mCount; // Cache mImageList.getCount(); |
| 135 | private int mRows; // Cache (mCount + mColumns - 1) / mColumns |
| 136 | private int mBlockHeight; // Cache mSpec.mCellSpacing + mSpec.mCellHeight |
| 137 | |
| 138 | private boolean mRunning = false; |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 139 | private Scroller mScroller = null; |
| 140 | |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 141 | public GridViewSpecial(Context context, AttributeSet attrs) { |
| 142 | super(context, attrs); |
| 143 | init(context); |
| 144 | } |
| 145 | |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 146 | private void init(Context context) { |
| 147 | setVerticalScrollBarEnabled(true); |
| 148 | initializeScrollbars(context.obtainStyledAttributes( |
| 149 | android.R.styleable.View)); |
| 150 | mGestureDetector = new GestureDetector(context, |
| 151 | new MyGestureDetector()); |
| 152 | setFocusableInTouchMode(true); |
Chih-Chung Chang | ab8c77f | 2009-07-28 18:41:23 +0800 | [diff] [blame] | 153 | initCellSize(); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 154 | } |
| 155 | |
Owen Lin | 77e110b | 2009-05-12 19:10:57 -0700 | [diff] [blame] | 156 | private final Runnable mRedrawCallback = new Runnable() { |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 157 | public void run() { |
| 158 | invalidate(); |
| 159 | } |
| 160 | }; |
| 161 | |
| 162 | public void setLoader(ImageLoader loader) { |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 163 | Assert(mRunning == false); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 164 | mLoader = loader; |
| 165 | } |
| 166 | |
| 167 | public void setListener(Listener listener) { |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 168 | Assert(mRunning == false); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 169 | mListener = listener; |
| 170 | } |
| 171 | |
| 172 | public void setDrawAdapter(DrawAdapter adapter) { |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 173 | Assert(mRunning == false); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 174 | mDrawAdapter = adapter; |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 175 | } |
| 176 | |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 177 | public void setImageList(IImageList list) { |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 178 | Assert(mRunning == false); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 179 | mAllImages = list; |
| 180 | mCount = mAllImages.getCount(); |
| 181 | } |
| 182 | |
| 183 | public void setSizeChoice(int choice) { |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 184 | Assert(mRunning == false); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 185 | if (mSizeChoice == choice) return; |
| 186 | mSizeChoice = choice; |
| 187 | } |
| 188 | |
| 189 | @Override |
| 190 | public void onLayout(boolean changed, int left, int top, |
| 191 | int right, int bottom) { |
| 192 | super.onLayout(changed, left, top, right, bottom); |
| 193 | |
| 194 | if (!mRunning) { |
| 195 | return; |
| 196 | } |
| 197 | |
| 198 | mSpec = mCellSizeChoices[mSizeChoice]; |
| 199 | |
| 200 | int width = right - left; |
| 201 | |
| 202 | // The width is divided into following parts: |
| 203 | // |
| 204 | // LeftEdgePadding CellWidth (CellSpacing CellWidth)* RightEdgePadding |
| 205 | // |
| 206 | // We determine number of cells (columns) first, then the left and right |
Chih-Chung Chang | 3343507 | 2009-05-14 12:36:58 +0800 | [diff] [blame] | 207 | // padding are derived. We make left and right paddings the same size. |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 208 | // |
| 209 | // The height is divided into following parts: |
| 210 | // |
| 211 | // CellSpacing (CellHeight CellSpacing)+ |
| 212 | |
| 213 | mColumns = 1 + (width - mSpec.mCellWidth) |
| 214 | / (mSpec.mCellWidth + mSpec.mCellSpacing); |
| 215 | |
| 216 | mSpec.mLeftEdgePadding = (width |
| 217 | - ((mColumns - 1) * mSpec.mCellSpacing) |
| 218 | - (mColumns * mSpec.mCellWidth)) / 2; |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 219 | |
| 220 | mRows = (mCount + mColumns - 1) / mColumns; |
| 221 | mBlockHeight = mSpec.mCellSpacing + mSpec.mCellHeight; |
| 222 | mMaxScrollY = mSpec.mCellSpacing + (mRows * mBlockHeight) |
| 223 | - (bottom - top); |
| 224 | |
Chih-Chung Chang | 56a8643 | 2009-05-13 16:42:57 +0800 | [diff] [blame] | 225 | // Put mScrollY in the valid range. This matters if mMaxScrollY is |
| 226 | // changed. For example, orientation changed from portrait to landscape. |
| 227 | mScrollY = Math.max(0, Math.min(mMaxScrollY, mScrollY)); |
| 228 | |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 229 | generateOutlineBitmap(); |
| 230 | |
| 231 | if (mImageBlockManager != null) { |
| 232 | mImageBlockManager.recycle(); |
| 233 | } |
| 234 | |
| 235 | mImageBlockManager = new ImageBlockManager(mHandler, mRedrawCallback, |
| 236 | mAllImages, mLoader, mDrawAdapter, mSpec, mColumns, width, |
| 237 | mOutline[OUTLINE_EMPTY]); |
| 238 | |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 239 | mListener.onLayoutComplete(changed); |
| 240 | |
Chih-Chung Chang | 56a8643 | 2009-05-13 16:42:57 +0800 | [diff] [blame] | 241 | moveDataWindow(); |
| 242 | |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 243 | mLayoutComplete = true; |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 244 | } |
| 245 | |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 246 | @Override |
| 247 | protected int computeVerticalScrollRange() { |
| 248 | return mMaxScrollY + getHeight(); |
| 249 | } |
| 250 | |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 251 | // We cache the three outlines from NinePatch to Bitmap to speed up |
| 252 | // drawing. The cache must be updated if the cell size is changed. |
| 253 | public static final int OUTLINE_EMPTY = 0; |
| 254 | public static final int OUTLINE_PRESSED = 1; |
| 255 | public static final int OUTLINE_SELECTED = 2; |
| 256 | |
| 257 | public Bitmap mOutline[] = new Bitmap[3]; |
| 258 | |
| 259 | private void generateOutlineBitmap() { |
| 260 | int w = mSpec.mCellWidth; |
| 261 | int h = mSpec.mCellHeight; |
| 262 | |
| 263 | for (int i = 0; i < mOutline.length; i++) { |
| 264 | mOutline[i] = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888); |
| 265 | } |
| 266 | |
| 267 | Drawable cellOutline; |
| 268 | cellOutline = GridViewSpecial.this.getResources() |
| 269 | .getDrawable(android.R.drawable.gallery_thumb); |
| 270 | cellOutline.setBounds(0, 0, w, h); |
| 271 | Canvas canvas = new Canvas(); |
| 272 | |
| 273 | canvas.setBitmap(mOutline[OUTLINE_EMPTY]); |
| 274 | cellOutline.setState(EMPTY_STATE_SET); |
| 275 | cellOutline.draw(canvas); |
| 276 | |
| 277 | canvas.setBitmap(mOutline[OUTLINE_PRESSED]); |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 278 | cellOutline.setState( |
| 279 | PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 280 | cellOutline.draw(canvas); |
| 281 | |
| 282 | canvas.setBitmap(mOutline[OUTLINE_SELECTED]); |
| 283 | cellOutline.setState(ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET); |
| 284 | cellOutline.draw(canvas); |
| 285 | } |
| 286 | |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 287 | private void moveDataWindow() { |
| 288 | // Calculate visible region according to scroll position. |
| 289 | int startRow = (mScrollY - mSpec.mCellSpacing) / mBlockHeight; |
| 290 | int endRow = (mScrollY + getHeight() - mSpec.mCellSpacing - 1) |
Chih-Chung Chang | f1474b0 | 2009-05-15 11:22:37 +0800 | [diff] [blame] | 291 | / mBlockHeight + 1; |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 292 | |
Chih-Chung Chang | 56a8643 | 2009-05-13 16:42:57 +0800 | [diff] [blame] | 293 | // Limit startRow and endRow to the valid range. |
Chih-Chung Chang | f1474b0 | 2009-05-15 11:22:37 +0800 | [diff] [blame] | 294 | // Make sure we handle the mRows == 0 case right. |
| 295 | startRow = Math.max(Math.min(startRow, mRows - 1), 0); |
| 296 | endRow = Math.max(Math.min(endRow, mRows), 0); |
| 297 | mImageBlockManager.setVisibleRows(startRow, endRow); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 298 | } |
| 299 | |
Chih-Chung Chang | 938aad0 | 2009-05-22 13:32:46 +0800 | [diff] [blame] | 300 | // In MyGestureDetector we have to check canHandleEvent() because |
| 301 | // GestureDetector could queue events and fire them later. At that time |
| 302 | // stop() may have already been called and we can't handle the events. |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 303 | private class MyGestureDetector extends SimpleOnGestureListener { |
Wu-cheng Li | b066347 | 2009-08-12 11:36:49 +0800 | [diff] [blame] | 304 | private AudioManager mAudioManager; |
| 305 | |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 306 | @Override |
| 307 | public boolean onDown(MotionEvent e) { |
Chih-Chung Chang | 938aad0 | 2009-05-22 13:32:46 +0800 | [diff] [blame] | 308 | if (!canHandleEvent()) return false; |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 309 | if (mScroller != null && !mScroller.isFinished()) { |
| 310 | mScroller.forceFinished(true); |
| 311 | return false; |
| 312 | } |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 313 | int index = computeSelectedIndex(e.getX(), e.getY()); |
| 314 | if (index >= 0 && index < mCount) { |
| 315 | setSelectedIndex(index); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 316 | } else { |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 317 | setSelectedIndex(INDEX_NONE); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 318 | } |
| 319 | return true; |
| 320 | } |
| 321 | |
| 322 | @Override |
| 323 | public boolean onFling(MotionEvent e1, MotionEvent e2, |
| 324 | float velocityX, float velocityY) { |
Chih-Chung Chang | 938aad0 | 2009-05-22 13:32:46 +0800 | [diff] [blame] | 325 | if (!canHandleEvent()) return false; |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 326 | if (velocityY > MAX_FLING_VELOCITY) { |
| 327 | velocityY = MAX_FLING_VELOCITY; |
| 328 | } else if (velocityY < -MAX_FLING_VELOCITY) { |
| 329 | velocityY = -MAX_FLING_VELOCITY; |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 330 | } |
| 331 | |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 332 | setSelectedIndex(INDEX_NONE); |
Chih-Chung Chang | 3343507 | 2009-05-14 12:36:58 +0800 | [diff] [blame] | 333 | mScroller = new Scroller(getContext()); |
| 334 | mScroller.fling(0, mScrollY, 0, -(int) velocityY, 0, 0, 0, |
| 335 | mMaxScrollY); |
| 336 | computeScroll(); |
| 337 | |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 338 | return true; |
| 339 | } |
| 340 | |
| 341 | @Override |
| 342 | public void onLongPress(MotionEvent e) { |
Chih-Chung Chang | 4952a3f | 2009-05-14 10:35:07 +0800 | [diff] [blame] | 343 | if (!canHandleEvent()) return; |
| 344 | performLongClick(); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | @Override |
| 348 | public boolean onScroll(MotionEvent e1, MotionEvent e2, |
| 349 | float distanceX, float distanceY) { |
Chih-Chung Chang | 938aad0 | 2009-05-22 13:32:46 +0800 | [diff] [blame] | 350 | if (!canHandleEvent()) return false; |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 351 | setSelectedIndex(INDEX_NONE); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 352 | scrollBy(0, (int) distanceY); |
| 353 | invalidate(); |
| 354 | return true; |
| 355 | } |
| 356 | |
| 357 | @Override |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 358 | public boolean onSingleTapConfirmed(MotionEvent e) { |
Chih-Chung Chang | 938aad0 | 2009-05-22 13:32:46 +0800 | [diff] [blame] | 359 | if (!canHandleEvent()) return false; |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 360 | int index = computeSelectedIndex(e.getX(), e.getY()); |
| 361 | if (index >= 0 && index < mCount) { |
Wu-cheng Li | b066347 | 2009-08-12 11:36:49 +0800 | [diff] [blame] | 362 | // Play click sound. |
| 363 | if (mAudioManager == null) { |
Chih-Chung Chang | 522e836 | 2009-08-26 16:12:34 +0800 | [diff] [blame] | 364 | mAudioManager = (AudioManager) getContext() |
| 365 | .getSystemService(Context.AUDIO_SERVICE); |
Wu-cheng Li | b066347 | 2009-08-12 11:36:49 +0800 | [diff] [blame] | 366 | } |
| 367 | mAudioManager.playSoundEffect(AudioManager.FX_KEY_CLICK); |
| 368 | |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 369 | mListener.onImageTapped(index); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 370 | return true; |
| 371 | } |
| 372 | return false; |
| 373 | } |
| 374 | } |
| 375 | |
| 376 | public int getCurrentSelection() { |
| 377 | return mCurrentSelection; |
| 378 | } |
| 379 | |
Ray Chen | 92eedd6 | 2009-07-15 18:38:29 +0800 | [diff] [blame] | 380 | public void invalidateImage(int index) { |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 381 | if (index != INDEX_NONE) { |
Ray Chen | 92eedd6 | 2009-07-15 18:38:29 +0800 | [diff] [blame] | 382 | mImageBlockManager.invalidateImage(index); |
| 383 | } |
| 384 | } |
| 385 | |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 386 | /** |
| 387 | * |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 388 | * @param index <code>INDEX_NONE</code> (-1) means remove selection. |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 389 | */ |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 390 | public void setSelectedIndex(int index) { |
| 391 | // A selection box will be shown for the image that being selected, |
| 392 | // (by finger or by the dpad center key). The selection box can be drawn |
| 393 | // in two colors. One color (yellow) is used when the the image is |
Chih-Chung Chang | 522e836 | 2009-08-26 16:12:34 +0800 | [diff] [blame] | 394 | // still being tapped or clicked (the finger is still on the touch |
| 395 | // screen or the dpad center key is not released). Another color |
| 396 | // (orange) is used after the finger leaves touch screen or the dpad |
| 397 | // center key is released. |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 398 | |
| 399 | if (mCurrentSelection == index) { |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 400 | return; |
| 401 | } |
Chih-Chung Chang | 724e9b3 | 2009-05-19 14:35:15 +0800 | [diff] [blame] | 402 | // This happens when the last picture is deleted. |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 403 | mCurrentSelection = Math.min(index, mCount - 1); |
Chih-Chung Chang | 724e9b3 | 2009-05-19 14:35:15 +0800 | [diff] [blame] | 404 | |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 405 | if (mCurrentSelection != INDEX_NONE) { |
| 406 | ensureVisible(mCurrentSelection); |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 407 | } |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 408 | invalidate(); |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 409 | } |
| 410 | |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 411 | public void scrollToImage(int index) { |
| 412 | Rect r = getRectForPosition(index); |
| 413 | scrollTo(0, r.top); |
| 414 | } |
| 415 | |
Owen Lin | 0e27f8d | 2009-04-29 01:11:45 -0700 | [diff] [blame] | 416 | public void scrollToVisible(int index) { |
| 417 | Rect r = getRectForPosition(index); |
| 418 | int top = getScrollY(); |
| 419 | int bottom = getScrollY() + getHeight(); |
| 420 | if (r.bottom > bottom) { |
| 421 | scrollTo(0, r.bottom - getHeight()); |
| 422 | } else if (r.top < top) { |
| 423 | scrollTo(0, r.top); |
| 424 | } |
| 425 | } |
| 426 | |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 427 | private void ensureVisible(int pos) { |
| 428 | Rect r = getRectForPosition(pos); |
| 429 | int top = getScrollY(); |
| 430 | int bot = top + getHeight(); |
| 431 | |
| 432 | if (r.bottom > bot) { |
| 433 | mScroller = new Scroller(getContext()); |
| 434 | mScroller.startScroll(mScrollX, mScrollY, 0, |
| 435 | r.bottom - getHeight() - mScrollY, 200); |
| 436 | computeScroll(); |
| 437 | } else if (r.top < top) { |
| 438 | mScroller = new Scroller(getContext()); |
| 439 | mScroller.startScroll(mScrollX, mScrollY, 0, r.top - mScrollY, 200); |
| 440 | computeScroll(); |
| 441 | } |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 442 | } |
| 443 | |
| 444 | public void start() { |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 445 | // These must be set before start(). |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 446 | Assert(mLoader != null); |
| 447 | Assert(mListener != null); |
| 448 | Assert(mDrawAdapter != null); |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 449 | mRunning = true; |
| 450 | requestLayout(); |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 451 | } |
| 452 | |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 453 | // If the the underlying data is changed, for example, |
| 454 | // an image is deleted, or the size choice is changed, |
| 455 | // The following sequence is needed: |
| 456 | // |
| 457 | // mGvs.stop(); |
| 458 | // mGvs.set...(...); |
| 459 | // mGvs.set...(...); |
| 460 | // mGvs.start(); |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 461 | public void stop() { |
Owen Lin | 77e110b | 2009-05-12 19:10:57 -0700 | [diff] [blame] | 462 | // Remove the long press callback from the queue if we are going to |
Chih-Chung Chang | 4952a3f | 2009-05-14 10:35:07 +0800 | [diff] [blame] | 463 | // stop. |
Owen Lin | 77e110b | 2009-05-12 19:10:57 -0700 | [diff] [blame] | 464 | mHandler.removeCallbacks(mLongPressCallback); |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 465 | mScroller = null; |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 466 | if (mImageBlockManager != null) { |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 467 | mImageBlockManager.recycle(); |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 468 | mImageBlockManager = null; |
| 469 | } |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 470 | mRunning = false; |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 471 | mCurrentSelection = INDEX_NONE; |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 472 | } |
| 473 | |
| 474 | @Override |
| 475 | public void onDraw(Canvas canvas) { |
| 476 | super.onDraw(canvas); |
Chih-Chung Chang | 4952a3f | 2009-05-14 10:35:07 +0800 | [diff] [blame] | 477 | if (!canHandleEvent()) return; |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 478 | mImageBlockManager.doDraw(canvas, getWidth(), getHeight(), mScrollY); |
Chih-Chung Chang | cb4b88e | 2009-07-07 20:01:55 +0800 | [diff] [blame] | 479 | paintDecoration(canvas); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 480 | paintSelection(canvas); |
| 481 | moveDataWindow(); |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 482 | } |
| 483 | |
| 484 | @Override |
| 485 | public void computeScroll() { |
| 486 | if (mScroller != null) { |
| 487 | boolean more = mScroller.computeScrollOffset(); |
| 488 | scrollTo(0, mScroller.getCurrY()); |
| 489 | if (more) { |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 490 | invalidate(); // So we draw again |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 491 | } else { |
| 492 | mScroller = null; |
| 493 | } |
| 494 | } else { |
| 495 | super.computeScroll(); |
| 496 | } |
| 497 | } |
| 498 | |
| 499 | // Return the rectange for the thumbnail in the given position. |
| 500 | Rect getRectForPosition(int pos) { |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 501 | int row = pos / mColumns; |
| 502 | int col = pos - (row * mColumns); |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 503 | |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 504 | int left = mSpec.mLeftEdgePadding |
| 505 | + (col * (mSpec.mCellWidth + mSpec.mCellSpacing)); |
| 506 | int top = row * mBlockHeight; |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 507 | |
| 508 | return new Rect(left, top, |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 509 | left + mSpec.mCellWidth + mSpec.mCellSpacing, |
| 510 | top + mSpec.mCellHeight + mSpec.mCellSpacing); |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 511 | } |
| 512 | |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 513 | // Inverse of getRectForPosition: from screen coordinate to image position. |
| 514 | int computeSelectedIndex(float xFloat, float yFloat) { |
| 515 | int x = (int) xFloat; |
| 516 | int y = (int) yFloat; |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 517 | |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 518 | int spacing = mSpec.mCellSpacing; |
| 519 | int leftSpacing = mSpec.mLeftEdgePadding; |
| 520 | |
| 521 | int row = (mScrollY + y - spacing) / (mSpec.mCellHeight + spacing); |
| 522 | int col = Math.min(mColumns - 1, |
| 523 | (x - leftSpacing) / (mSpec.mCellWidth + spacing)); |
| 524 | return (row * mColumns) + col; |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 525 | } |
| 526 | |
| 527 | @Override |
| 528 | public boolean onTouchEvent(MotionEvent ev) { |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 529 | if (!canHandleEvent()) { |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 530 | return false; |
| 531 | } |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 532 | switch (ev.getAction()) { |
| 533 | case MotionEvent.ACTION_DOWN: |
| 534 | mCurrentPressState |= TAPPING_FLAG; |
| 535 | invalidate(); |
| 536 | break; |
| 537 | case MotionEvent.ACTION_UP: |
| 538 | mCurrentPressState &= ~TAPPING_FLAG; |
| 539 | invalidate(); |
| 540 | break; |
| 541 | } |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 542 | mGestureDetector.onTouchEvent(ev); |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 543 | // Consume all events |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 544 | return true; |
| 545 | } |
| 546 | |
| 547 | @Override |
| 548 | public void scrollBy(int x, int y) { |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 549 | scrollTo(mScrollX + x, mScrollY + y); |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 550 | } |
| 551 | |
Owen Lin | 0e27f8d | 2009-04-29 01:11:45 -0700 | [diff] [blame] | 552 | public void scrollTo(float scrollPosition) { |
| 553 | scrollTo(0, Math.round(scrollPosition * mMaxScrollY)); |
| 554 | } |
| 555 | |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 556 | @Override |
| 557 | public void scrollTo(int x, int y) { |
Owen Lin | 0e27f8d | 2009-04-29 01:11:45 -0700 | [diff] [blame] | 558 | y = Math.max(0, Math.min(mMaxScrollY, y)); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 559 | if (mSpec != null) { |
Owen Lin | 0e27f8d | 2009-04-29 01:11:45 -0700 | [diff] [blame] | 560 | mListener.onScroll((float) mScrollY / mMaxScrollY); |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 561 | } |
| 562 | super.scrollTo(x, y); |
| 563 | } |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 564 | |
| 565 | private boolean canHandleEvent() { |
| 566 | return mRunning && mLayoutComplete; |
| 567 | } |
| 568 | |
| 569 | private final Runnable mLongPressCallback = new Runnable() { |
| 570 | public void run() { |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 571 | mCurrentPressState &= ~CLICKING_FLAG; |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 572 | showContextMenu(); |
| 573 | } |
| 574 | }; |
| 575 | |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 576 | @Override |
| 577 | public boolean onKeyDown(int keyCode, KeyEvent event) { |
| 578 | if (!canHandleEvent()) return false; |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 579 | int sel = mCurrentSelection; |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 580 | if (sel != INDEX_NONE) { |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 581 | switch (keyCode) { |
| 582 | case KeyEvent.KEYCODE_DPAD_RIGHT: |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 583 | if (sel != mCount - 1 && (sel % mColumns < mColumns - 1)) { |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 584 | sel += 1; |
| 585 | } |
| 586 | break; |
| 587 | case KeyEvent.KEYCODE_DPAD_LEFT: |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 588 | if (sel > 0 && (sel % mColumns != 0)) { |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 589 | sel -= 1; |
| 590 | } |
| 591 | break; |
| 592 | case KeyEvent.KEYCODE_DPAD_UP: |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 593 | if (sel >= mColumns) { |
| 594 | sel -= mColumns; |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 595 | } |
| 596 | break; |
| 597 | case KeyEvent.KEYCODE_DPAD_DOWN: |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 598 | sel = Math.min(mCount - 1, sel + mColumns); |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 599 | break; |
| 600 | case KeyEvent.KEYCODE_DPAD_CENTER: |
Chih-Chung Chang | d998ce9 | 2009-09-27 11:45:07 -0700 | [diff] [blame] | 601 | if (event.getRepeatCount() == 0) { |
| 602 | mCurrentPressState |= CLICKING_FLAG; |
| 603 | mHandler.postDelayed(mLongPressCallback, |
| 604 | ViewConfiguration.getLongPressTimeout()); |
| 605 | } |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 606 | break; |
| 607 | default: |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 608 | return super.onKeyDown(keyCode, event); |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 609 | } |
| 610 | } else { |
| 611 | switch (keyCode) { |
| 612 | case KeyEvent.KEYCODE_DPAD_RIGHT: |
| 613 | case KeyEvent.KEYCODE_DPAD_LEFT: |
| 614 | case KeyEvent.KEYCODE_DPAD_UP: |
| 615 | case KeyEvent.KEYCODE_DPAD_DOWN: |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 616 | int startRow = |
| 617 | (mScrollY - mSpec.mCellSpacing) / mBlockHeight; |
| 618 | int topPos = startRow * mColumns; |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 619 | Rect r = getRectForPosition(topPos); |
| 620 | if (r.top < getScrollY()) { |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 621 | topPos += mColumns; |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 622 | } |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 623 | topPos = Math.min(mCount - 1, topPos); |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 624 | sel = topPos; |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 625 | break; |
| 626 | default: |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 627 | return super.onKeyDown(keyCode, event); |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 628 | } |
| 629 | } |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 630 | setSelectedIndex(sel); |
| 631 | return true; |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 632 | } |
| 633 | |
| 634 | @Override |
| 635 | public boolean onKeyUp(int keyCode, KeyEvent event) { |
| 636 | if (!canHandleEvent()) return false; |
| 637 | |
| 638 | if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) { |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 639 | mCurrentPressState &= ~CLICKING_FLAG; |
| 640 | invalidate(); |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 641 | |
| 642 | // The keyUp doesn't get called when the longpress menu comes up. We |
| 643 | // only get here when the user lets go of the center key before the |
| 644 | // longpress menu comes up. |
| 645 | mHandler.removeCallbacks(mLongPressCallback); |
| 646 | |
| 647 | // open the photo |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 648 | mListener.onImageClicked(mCurrentSelection); |
Owen Lin | f310a3d | 2009-04-20 14:05:17 +0800 | [diff] [blame] | 649 | return true; |
| 650 | } |
| 651 | return super.onKeyUp(keyCode, event); |
| 652 | } |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 653 | |
Chih-Chung Chang | cb4b88e | 2009-07-07 20:01:55 +0800 | [diff] [blame] | 654 | private void paintDecoration(Canvas canvas) { |
| 655 | if (!mDrawAdapter.needsDecoration()) return; |
| 656 | |
| 657 | // Calculate visible region according to scroll position. |
| 658 | int startRow = (mScrollY - mSpec.mCellSpacing) / mBlockHeight; |
| 659 | int endRow = (mScrollY + getHeight() - mSpec.mCellSpacing - 1) |
| 660 | / mBlockHeight + 1; |
| 661 | |
| 662 | // Limit startRow and endRow to the valid range. |
| 663 | // Make sure we handle the mRows == 0 case right. |
| 664 | startRow = Math.max(Math.min(startRow, mRows - 1), 0); |
| 665 | endRow = Math.max(Math.min(endRow, mRows), 0); |
| 666 | |
| 667 | int startIndex = startRow * mColumns; |
| 668 | int endIndex = Math.min(endRow * mColumns, mCount); |
| 669 | |
| 670 | int xPos = mSpec.mLeftEdgePadding; |
| 671 | int yPos = mSpec.mCellSpacing + startRow * mBlockHeight; |
| 672 | int off = 0; |
| 673 | for (int i = startIndex; i < endIndex; i++) { |
| 674 | IImage image = mAllImages.getImageAt(i); |
| 675 | |
| 676 | mDrawAdapter.drawDecoration(canvas, image, xPos, yPos, |
| 677 | mSpec.mCellWidth, mSpec.mCellHeight); |
| 678 | |
| 679 | // Calculate next position |
| 680 | off += 1; |
| 681 | if (off == mColumns) { |
| 682 | xPos = mSpec.mLeftEdgePadding; |
| 683 | yPos += mBlockHeight; |
| 684 | off = 0; |
| 685 | } else { |
| 686 | xPos += mSpec.mCellWidth + mSpec.mCellSpacing; |
| 687 | } |
| 688 | } |
| 689 | } |
| 690 | |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 691 | private void paintSelection(Canvas canvas) { |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 692 | if (mCurrentSelection == INDEX_NONE) return; |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 693 | |
| 694 | int row = mCurrentSelection / mColumns; |
| 695 | int col = mCurrentSelection - (row * mColumns); |
| 696 | |
| 697 | int spacing = mSpec.mCellSpacing; |
| 698 | int leftSpacing = mSpec.mLeftEdgePadding; |
| 699 | int xPos = leftSpacing + (col * (mSpec.mCellWidth + spacing)); |
| 700 | int yTop = spacing + (row * mBlockHeight); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 701 | |
| 702 | int type = OUTLINE_SELECTED; |
Owen Lin | 4c2f857 | 2009-07-08 15:13:54 -0700 | [diff] [blame] | 703 | if (mCurrentPressState != 0) { |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 704 | type = OUTLINE_PRESSED; |
| 705 | } |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 706 | canvas.drawBitmap(mOutline[type], xPos, yTop, null); |
| 707 | } |
| 708 | } |
| 709 | |
| 710 | class ImageBlockManager { |
Owen Lin | deb5725 | 2009-05-27 14:55:45 -0700 | [diff] [blame] | 711 | @SuppressWarnings("unused") |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 712 | private static final String TAG = "ImageBlockManager"; |
| 713 | |
| 714 | // Number of rows we want to cache. |
| 715 | // Assume there are 6 rows per page, this caches 5 pages. |
| 716 | private static final int CACHE_ROWS = 30; |
| 717 | |
| 718 | // mCache maps from row number to the ImageBlock. |
| 719 | private final HashMap<Integer, ImageBlock> mCache; |
| 720 | |
| 721 | // These are parameters set in the constructor. |
| 722 | private final Handler mHandler; |
| 723 | private final Runnable mRedrawCallback; // Called after a row is loaded, |
| 724 | // so GridViewSpecial can draw |
| 725 | // again using the new images. |
| 726 | private final IImageList mImageList; |
| 727 | private final ImageLoader mLoader; |
| 728 | private final GridViewSpecial.DrawAdapter mDrawAdapter; |
| 729 | private final GridViewSpecial.LayoutSpec mSpec; |
| 730 | private final int mColumns; // Columns per row. |
| 731 | private final int mBlockWidth; // The width of an ImageBlock. |
| 732 | private final Bitmap mOutline; // The outline bitmap put on top of each |
| 733 | // image. |
| 734 | private final int mCount; // Cache mImageList.getCount(). |
| 735 | private final int mRows; // Cache (mCount + mColumns - 1) / mColumns |
| 736 | private final int mBlockHeight; // The height of an ImageBlock. |
| 737 | |
| 738 | // Visible row range: [mStartRow, mEndRow). Set by setVisibleRows(). |
| 739 | private int mStartRow = 0; |
| 740 | private int mEndRow = 0; |
| 741 | |
| 742 | ImageBlockManager(Handler handler, Runnable redrawCallback, |
| 743 | IImageList imageList, ImageLoader loader, |
| 744 | GridViewSpecial.DrawAdapter adapter, |
| 745 | GridViewSpecial.LayoutSpec spec, |
| 746 | int columns, int blockWidth, Bitmap outline) { |
| 747 | mHandler = handler; |
| 748 | mRedrawCallback = redrawCallback; |
| 749 | mImageList = imageList; |
| 750 | mLoader = loader; |
| 751 | mDrawAdapter = adapter; |
| 752 | mSpec = spec; |
| 753 | mColumns = columns; |
| 754 | mBlockWidth = blockWidth; |
| 755 | mOutline = outline; |
| 756 | mBlockHeight = mSpec.mCellSpacing + mSpec.mCellHeight; |
| 757 | mCount = imageList.getCount(); |
| 758 | mRows = (mCount + mColumns - 1) / mColumns; |
| 759 | mCache = new HashMap<Integer, ImageBlock>(); |
| 760 | mPendingRequest = 0; |
| 761 | initGraphics(); |
| 762 | } |
| 763 | |
| 764 | // Set the window of visible rows. Once set we will start to load them as |
| 765 | // soon as possible (if they are not already in cache). |
| 766 | public void setVisibleRows(int startRow, int endRow) { |
| 767 | if (startRow != mStartRow || endRow != mEndRow) { |
| 768 | mStartRow = startRow; |
| 769 | mEndRow = endRow; |
| 770 | startLoading(); |
| 771 | } |
| 772 | } |
| 773 | |
| 774 | int mPendingRequest; // Number of pending requests (sent to ImageLoader). |
Chih-Chung Chang | 724e9b3 | 2009-05-19 14:35:15 +0800 | [diff] [blame] | 775 | // We want to keep enough requests in ImageLoader's queue, but not too |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 776 | // many. |
| 777 | static final int REQUESTS_LOW = 3; |
| 778 | static final int REQUESTS_HIGH = 6; |
| 779 | |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 780 | // After clear requests currently in queue, start loading the thumbnails. |
| 781 | // We need to clear the queue first because the proper order of loading |
| 782 | // may have changed (because the visible region changed, or some images |
| 783 | // have been invalidated). |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 784 | private void startLoading() { |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 785 | clearLoaderQueue(); |
| 786 | continueLoading(); |
| 787 | } |
| 788 | |
| 789 | private void clearLoaderQueue() { |
| 790 | int[] tags = mLoader.clearQueue(); |
| 791 | for (int pos : tags) { |
| 792 | int row = pos / mColumns; |
| 793 | int col = pos - row * mColumns; |
| 794 | ImageBlock blk = mCache.get(row); |
| 795 | Assert(blk != null); // We won't reuse the block if it has pending |
| 796 | // requests. See getEmptyBlock(). |
| 797 | blk.cancelRequest(col); |
| 798 | } |
| 799 | } |
| 800 | |
| 801 | // Scan the cache and send requests to ImageLoader if needed. |
| 802 | private void continueLoading() { |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 803 | // Check if we still have enough requests in the queue. |
| 804 | if (mPendingRequest >= REQUESTS_LOW) return; |
| 805 | |
| 806 | // Scan the visible rows. |
| 807 | for (int i = mStartRow; i < mEndRow; i++) { |
| 808 | if (scanOne(i)) return; |
| 809 | } |
| 810 | |
| 811 | int range = (CACHE_ROWS - (mEndRow - mStartRow)) / 2; |
| 812 | // Scan other rows. |
| 813 | // d is the distance between the row and visible region. |
| 814 | for (int d = 1; d <= range; d++) { |
| 815 | int after = mEndRow - 1 + d; |
| 816 | int before = mStartRow - d; |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 817 | if (after >= mRows && before < 0) { |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 818 | break; // Nothing more the scan. |
| 819 | } |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 820 | if (after < mRows && scanOne(after)) return; |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 821 | if (before >= 0 && scanOne(before)) return; |
| 822 | } |
| 823 | } |
| 824 | |
| 825 | // Returns true if we can stop scanning. |
| 826 | private boolean scanOne(int i) { |
| 827 | mPendingRequest += tryToLoad(i); |
| 828 | return mPendingRequest >= REQUESTS_HIGH; |
| 829 | } |
| 830 | |
| 831 | // Returns number of requests we issued for this row. |
| 832 | private int tryToLoad(int row) { |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 833 | Assert(row >= 0 && row < mRows); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 834 | ImageBlock blk = mCache.get(row); |
| 835 | if (blk == null) { |
| 836 | // Find an empty block |
| 837 | blk = getEmptyBlock(); |
| 838 | blk.setRow(row); |
| 839 | blk.invalidate(); |
| 840 | mCache.put(row, blk); |
| 841 | } |
| 842 | return blk.loadImages(); |
| 843 | } |
| 844 | |
| 845 | // Get an empty block for the cache. |
| 846 | private ImageBlock getEmptyBlock() { |
| 847 | // See if we can allocate a new block. |
| 848 | if (mCache.size() < CACHE_ROWS) { |
| 849 | return new ImageBlock(); |
| 850 | } |
| 851 | // Reclaim the old block with largest distance from the visible region. |
| 852 | int bestDistance = -1; |
| 853 | int bestIndex = -1; |
| 854 | for (int index : mCache.keySet()) { |
| 855 | // Make sure we don't reclaim a block which still has pending |
| 856 | // request. |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 857 | if (mCache.get(index).hasPendingRequests()) { |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 858 | continue; |
| 859 | } |
| 860 | int dist = 0; |
| 861 | if (index >= mEndRow) { |
| 862 | dist = index - mEndRow + 1; |
| 863 | } else if (index < mStartRow) { |
| 864 | dist = mStartRow - index; |
| 865 | } else { |
| 866 | // Inside the visible region. |
| 867 | continue; |
| 868 | } |
| 869 | if (dist > bestDistance) { |
| 870 | bestDistance = dist; |
| 871 | bestIndex = index; |
| 872 | } |
| 873 | } |
| 874 | return mCache.remove(bestIndex); |
| 875 | } |
| 876 | |
Ray Chen | 92eedd6 | 2009-07-15 18:38:29 +0800 | [diff] [blame] | 877 | public void invalidateImage(int index) { |
| 878 | int row = index / mColumns; |
| 879 | int col = index - (row * mColumns); |
| 880 | ImageBlock blk = mCache.get(row); |
| 881 | if (blk == null) return; |
| 882 | if ((blk.mCompletedMask & (1 << col)) != 0) { |
| 883 | blk.mCompletedMask &= ~(1 << col); |
| 884 | } |
| 885 | startLoading(); |
| 886 | } |
| 887 | |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 888 | // After calling recycle(), the instance should not be used anymore. |
| 889 | public void recycle() { |
| 890 | for (ImageBlock blk : mCache.values()) { |
| 891 | blk.recycle(); |
| 892 | } |
| 893 | mCache.clear(); |
| 894 | mEmptyBitmap.recycle(); |
| 895 | } |
| 896 | |
| 897 | // Draw the images to the given canvas. |
| 898 | public void doDraw(Canvas canvas, int thisWidth, int thisHeight, |
| 899 | int scrollPos) { |
| 900 | final int height = mBlockHeight; |
| 901 | |
| 902 | // Note that currentBlock could be negative. |
| 903 | int currentBlock = (scrollPos < 0) |
| 904 | ? ((scrollPos - height + 1) / height) |
| 905 | : (scrollPos / height); |
| 906 | |
| 907 | while (true) { |
| 908 | final int yPos = currentBlock * height; |
| 909 | if (yPos >= scrollPos + thisHeight) { |
| 910 | break; |
| 911 | } |
| 912 | |
| 913 | ImageBlock blk = mCache.get(currentBlock); |
| 914 | if (blk != null) { |
| 915 | blk.doDraw(canvas, 0, yPos); |
| 916 | } else { |
| 917 | drawEmptyBlock(canvas, 0, yPos, currentBlock); |
| 918 | } |
| 919 | |
| 920 | currentBlock += 1; |
| 921 | } |
| 922 | } |
| 923 | |
| 924 | // Return number of columns in the given row. (This could be less than |
| 925 | // mColumns for the last row). |
| 926 | private int numColumns(int row) { |
| 927 | return Math.min(mColumns, mCount - row * mColumns); |
| 928 | } |
| 929 | |
| 930 | // Draw a block which has not been loaded. |
| 931 | private void drawEmptyBlock(Canvas canvas, int xPos, int yPos, int row) { |
| 932 | // Draw the background. |
| 933 | canvas.drawRect(xPos, yPos, xPos + mBlockWidth, yPos + mBlockHeight, |
| 934 | mBackgroundPaint); |
| 935 | |
| 936 | // Draw the empty images. |
| 937 | int x = xPos + mSpec.mLeftEdgePadding; |
| 938 | int y = yPos + mSpec.mCellSpacing; |
| 939 | int cols = numColumns(row); |
| 940 | |
| 941 | for (int i = 0; i < cols; i++) { |
| 942 | canvas.drawBitmap(mEmptyBitmap, x, y, null); |
| 943 | x += (mSpec.mCellWidth + mSpec.mCellSpacing); |
| 944 | } |
| 945 | } |
| 946 | |
| 947 | // mEmptyBitmap is what we draw if we the wanted block hasn't been loaded. |
| 948 | // (If the user scrolls too fast). It is a gray image with normal outline. |
| 949 | // mBackgroundPaint is used to draw the (black) background outside |
| 950 | // mEmptyBitmap. |
| 951 | Paint mBackgroundPaint; |
| 952 | private Bitmap mEmptyBitmap; |
| 953 | |
| 954 | private void initGraphics() { |
| 955 | mBackgroundPaint = new Paint(); |
| 956 | mBackgroundPaint.setStyle(Paint.Style.FILL); |
| 957 | mBackgroundPaint.setColor(0xFF000000); // black |
| 958 | mEmptyBitmap = Bitmap.createBitmap(mSpec.mCellWidth, mSpec.mCellHeight, |
| 959 | Bitmap.Config.RGB_565); |
| 960 | Canvas canvas = new Canvas(mEmptyBitmap); |
| 961 | canvas.drawRGB(0xDD, 0xDD, 0xDD); |
| 962 | canvas.drawBitmap(mOutline, 0, 0, null); |
| 963 | } |
| 964 | |
| 965 | // ImageBlock stores bitmap for one row. The loaded thumbnail images are |
| 966 | // drawn to mBitmap. mBitmap is later used in onDraw() of GridViewSpecial. |
| 967 | private class ImageBlock { |
| 968 | private Bitmap mBitmap; |
Owen Lin | 77e110b | 2009-05-12 19:10:57 -0700 | [diff] [blame] | 969 | private final Canvas mCanvas; |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 970 | |
| 971 | // Columns which have been requested to the loader |
| 972 | private int mRequestedMask; |
| 973 | |
| 974 | // Columns which have been completed from the loader |
| 975 | private int mCompletedMask; |
| 976 | |
| 977 | // The row number this block represents. |
| 978 | private int mRow; |
| 979 | |
| 980 | public ImageBlock() { |
| 981 | mBitmap = Bitmap.createBitmap(mBlockWidth, mBlockHeight, |
| 982 | Bitmap.Config.RGB_565); |
| 983 | mCanvas = new Canvas(mBitmap); |
| 984 | mRow = -1; |
| 985 | } |
| 986 | |
| 987 | public void setRow(int row) { |
| 988 | mRow = row; |
| 989 | } |
| 990 | |
| 991 | public void invalidate() { |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 992 | // We do not change mRequestedMask or do cancelAllRequests() |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 993 | // because the data coming from pending requests are valid. (We only |
| 994 | // invalidate data which has been drawn to the bitmap). |
| 995 | mCompletedMask = 0; |
| 996 | } |
| 997 | |
| 998 | // After recycle, the ImageBlock instance should not be accessed. |
| 999 | public void recycle() { |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 1000 | cancelAllRequests(); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 1001 | mBitmap.recycle(); |
| 1002 | mBitmap = null; |
| 1003 | } |
| 1004 | |
| 1005 | private boolean isVisible() { |
| 1006 | return mRow >= mStartRow && mRow < mEndRow; |
| 1007 | } |
| 1008 | |
| 1009 | // Returns number of requests submitted to ImageLoader. |
| 1010 | public int loadImages() { |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 1011 | Assert(mRow != -1); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 1012 | |
| 1013 | int columns = numColumns(mRow); |
| 1014 | |
| 1015 | // Calculate what we need. |
| 1016 | int needMask = ((1 << columns) - 1) |
| 1017 | & ~(mCompletedMask | mRequestedMask); |
| 1018 | |
| 1019 | if (needMask == 0) { |
| 1020 | return 0; |
| 1021 | } |
| 1022 | |
| 1023 | int retVal = 0; |
| 1024 | int base = mRow * mColumns; |
| 1025 | |
| 1026 | for (int col = 0; col < columns; col++) { |
| 1027 | if ((needMask & (1 << col)) == 0) { |
| 1028 | continue; |
| 1029 | } |
| 1030 | |
| 1031 | int pos = base + col; |
| 1032 | |
| 1033 | final IImage image = mImageList.getImageAt(pos); |
| 1034 | if (image != null) { |
| 1035 | // This callback is passed to ImageLoader. It will invoke |
| 1036 | // loadImageDone() in the main thread. We limit the callback |
| 1037 | // thread to be in this very short function. All other |
| 1038 | // processing is done in the main thread. |
| 1039 | final int colFinal = col; |
| 1040 | ImageLoader.LoadedCallback cb = |
| 1041 | new ImageLoader.LoadedCallback() { |
| 1042 | public void run(final Bitmap b) { |
| 1043 | mHandler.post(new Runnable() { |
| 1044 | public void run() { |
| 1045 | loadImageDone(image, b, |
| 1046 | colFinal); |
| 1047 | } |
| 1048 | }); |
| 1049 | } |
| 1050 | }; |
| 1051 | // Load Image |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 1052 | mLoader.getBitmap(image, cb, pos); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 1053 | mRequestedMask |= (1 << col); |
| 1054 | retVal += 1; |
| 1055 | } |
| 1056 | } |
| 1057 | |
| 1058 | return retVal; |
| 1059 | } |
| 1060 | |
| 1061 | // Whether this block has pending requests. |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 1062 | public boolean hasPendingRequests() { |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 1063 | return mRequestedMask != 0; |
| 1064 | } |
| 1065 | |
| 1066 | // Called when an image is loaded. |
| 1067 | private void loadImageDone(IImage image, Bitmap b, |
| 1068 | int col) { |
| 1069 | if (mBitmap == null) return; // This block has been recycled. |
| 1070 | |
| 1071 | int spacing = mSpec.mCellSpacing; |
| 1072 | int leftSpacing = mSpec.mLeftEdgePadding; |
| 1073 | final int yPos = spacing; |
| 1074 | final int xPos = leftSpacing |
| 1075 | + (col * (mSpec.mCellWidth + spacing)); |
| 1076 | |
| 1077 | drawBitmap(image, b, xPos, yPos); |
| 1078 | |
| 1079 | if (b != null) { |
| 1080 | b.recycle(); |
| 1081 | } |
| 1082 | |
| 1083 | int mask = (1 << col); |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 1084 | Assert((mCompletedMask & mask) == 0); |
| 1085 | Assert((mRequestedMask & mask) != 0); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 1086 | mRequestedMask &= ~mask; |
| 1087 | mCompletedMask |= mask; |
| 1088 | mPendingRequest--; |
| 1089 | |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 1090 | if (isVisible()) { |
| 1091 | mRedrawCallback.run(); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 1092 | } |
| 1093 | |
| 1094 | // Kick start next block loading. |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 1095 | continueLoading(); |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 1096 | } |
| 1097 | |
| 1098 | // Draw the loaded bitmap to the block bitmap. |
| 1099 | private void drawBitmap( |
| 1100 | IImage image, Bitmap b, int xPos, int yPos) { |
| 1101 | mDrawAdapter.drawImage(mCanvas, image, b, xPos, yPos, |
| 1102 | mSpec.mCellWidth, mSpec.mCellHeight); |
| 1103 | mCanvas.drawBitmap(mOutline, xPos, yPos, null); |
| 1104 | } |
| 1105 | |
| 1106 | // Draw the block bitmap to the specified canvas. |
| 1107 | public void doDraw(Canvas canvas, int xPos, int yPos) { |
| 1108 | int cols = numColumns(mRow); |
| 1109 | |
| 1110 | if (cols == mColumns) { |
| 1111 | canvas.drawBitmap(mBitmap, xPos, yPos, null); |
| 1112 | } else { |
| 1113 | |
| 1114 | // This must be the last row -- we draw only part of the block. |
| 1115 | // Draw the background. |
| 1116 | canvas.drawRect(xPos, yPos, xPos + mBlockWidth, |
| 1117 | yPos + mBlockHeight, mBackgroundPaint); |
| 1118 | // Draw part of the block. |
| 1119 | int w = mSpec.mLeftEdgePadding |
| 1120 | + cols * (mSpec.mCellWidth + mSpec.mCellSpacing); |
| 1121 | Rect srcRect = new Rect(0, 0, w, mBlockHeight); |
| 1122 | Rect dstRect = new Rect(srcRect); |
| 1123 | dstRect.offset(xPos, yPos); |
| 1124 | canvas.drawBitmap(mBitmap, srcRect, dstRect, null); |
| 1125 | } |
| 1126 | |
| 1127 | // Draw the part which has not been loaded. |
| 1128 | int isEmpty = ((1 << cols) - 1) & ~mCompletedMask; |
| 1129 | |
| 1130 | if (isEmpty != 0) { |
| 1131 | int x = xPos + mSpec.mLeftEdgePadding; |
| 1132 | int y = yPos + mSpec.mCellSpacing; |
| 1133 | |
| 1134 | for (int i = 0; i < cols; i++) { |
| 1135 | if ((isEmpty & (1 << i)) != 0) { |
| 1136 | canvas.drawBitmap(mEmptyBitmap, x, y, null); |
| 1137 | } |
| 1138 | x += (mSpec.mCellWidth + mSpec.mCellSpacing); |
| 1139 | } |
| 1140 | } |
| 1141 | } |
| 1142 | |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 1143 | // Mark a request as cancelled. The request has already been removed |
| 1144 | // from the queue of ImageLoader, so we only need to mark the fact. |
| 1145 | public void cancelRequest(int col) { |
| 1146 | int mask = (1 << col); |
| 1147 | Assert((mRequestedMask & mask) != 0); |
| 1148 | mRequestedMask &= ~mask; |
| 1149 | mPendingRequest--; |
| 1150 | } |
| 1151 | |
| 1152 | // Try to cancel all pending requests for this block. After this |
| 1153 | // completes there could still be requests not cancelled (because it is |
Chih-Chung Chang | 91acfc9 | 2009-07-06 15:37:24 +0800 | [diff] [blame] | 1154 | // already in progress). We deal with that situation by setting mBitmap |
| 1155 | // to null in recycle() and check this in loadImageDone(). |
Chih-Chung Chang | 341ad98 | 2009-05-12 14:44:49 +0800 | [diff] [blame] | 1156 | private void cancelAllRequests() { |
Chih-Chung Chang | a3be1aa | 2009-05-11 19:09:14 +0800 | [diff] [blame] | 1157 | for (int i = 0; i < mColumns; i++) { |
| 1158 | int mask = (1 << i); |
| 1159 | if ((mRequestedMask & mask) != 0) { |
| 1160 | int pos = (mRow * mColumns) + i; |
| 1161 | if (mLoader.cancel(mImageList.getImageAt(pos))) { |
| 1162 | mRequestedMask &= ~mask; |
| 1163 | mPendingRequest--; |
| 1164 | } |
| 1165 | } |
| 1166 | } |
| 1167 | } |
| 1168 | } |
Owen Lin | 1153ba1 | 2009-04-17 17:26:14 +0800 | [diff] [blame] | 1169 | } |