1 /* 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 17 package com.android.launcher2; 18 19 import android.app.WallpaperManager; 20 import android.content.Context; 21 import android.graphics.Canvas; 22 import android.graphics.Paint; 23 import android.graphics.Rect; 24 import android.view.View; 25 import android.view.ViewGroup; 26 27 public class ShortcutAndWidgetContainer extends ViewGroup { 28 static final String TAG = "CellLayoutChildren"; 29 30 // These are temporary variables to prevent having to allocate a new object just to 31 // return an (x, y) value from helper functions. Do NOT use them to maintain other state. 32 private final int[] mTmpCellXY = new int[2]; 33 34 private final WallpaperManager mWallpaperManager; 35 36 private int mCellWidth; 37 private int mCellHeight; 38 39 private int mWidthGap; 40 private int mHeightGap; 41 42 private int mCountX; 43 44 private boolean mInvertIfRtl = false; 45 46 public ShortcutAndWidgetContainer(Context context) { 47 super(context); 48 mWallpaperManager = WallpaperManager.getInstance(context); 49 } 50 51 public void setCellDimensions(int cellWidth, int cellHeight, int widthGap, int heightGap, 52 int countX) { 53 mCellWidth = cellWidth; 54 mCellHeight = cellHeight; 55 mWidthGap = widthGap; 56 mHeightGap = heightGap; 57 mCountX = countX; 58 } 59 60 public View getChildAt(int x, int y) { 61 final int count = getChildCount(); 62 for (int i = 0; i < count; i++) { 63 View child = getChildAt(i); 64 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 65 66 if ((lp.cellX <= x) && (x < lp.cellX + lp.cellHSpan) && 67 (lp.cellY <= y) && (y < lp.cellY + lp.cellVSpan)) { 68 return child; 69 } 70 } 71 return null; 72 } 73 74 @Override 75 protected void dispatchDraw(Canvas canvas) { 76 @SuppressWarnings("all") // suppress dead code warning 77 final boolean debug = false; 78 if (debug) { 79 // Debug drawing for hit space 80 Paint p = new Paint(); 81 p.setColor(0x6600FF00); 82 for (int i = getChildCount() - 1; i >= 0; i--) { 83 final View child = getChildAt(i); 84 final CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 85 86 canvas.drawRect(lp.x, lp.y, lp.x + lp.width, lp.y + lp.height, p); 87 } 88 } 89 super.dispatchDraw(canvas); 90 } 91 92 @Override 93 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 94 int count = getChildCount(); 95 for (int i = 0; i < count; i++) { 96 View child = getChildAt(i); 97 measureChild(child); 98 } 99 int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec); 100 int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec); 101 setMeasuredDimension(widthSpecSize, heightSpecSize); 102 } 103 104 public void setupLp(CellLayout.LayoutParams lp) { 105 lp.setup(mCellWidth, mCellHeight, mWidthGap, mHeightGap, invertLayoutHorizontally(), 106 mCountX); 107 } 108 109 // Set whether or not to invert the layout horizontally if the layout is in RTL mode. 110 public void setInvertIfRtl(boolean invert) { 111 mInvertIfRtl = invert; 112 } 113 114 public void measureChild(View child) { 115 final int cellWidth = mCellWidth; 116 final int cellHeight = mCellHeight; 117 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 118 119 lp.setup(cellWidth, cellHeight, mWidthGap, mHeightGap, invertLayoutHorizontally(), mCountX); 120 int childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(lp.width, MeasureSpec.EXACTLY); 121 int childheightMeasureSpec = MeasureSpec.makeMeasureSpec(lp.height, 122 MeasureSpec.EXACTLY); 123 child.measure(childWidthMeasureSpec, childheightMeasureSpec); 124 } 125 126 private boolean invertLayoutHorizontally() { 127 return mInvertIfRtl && isLayoutRtl(); 128 } 129 130 public boolean isLayoutRtl() { 131 return (getLayoutDirection() == LAYOUT_DIRECTION_RTL); 132 } 133 134 @Override 135 protected void onLayout(boolean changed, int l, int t, int r, int b) { 136 int count = getChildCount(); 137 for (int i = 0; i < count; i++) { 138 final View child = getChildAt(i); 139 if (child.getVisibility() != GONE) { 140 CellLayout.LayoutParams lp = (CellLayout.LayoutParams) child.getLayoutParams(); 141 142 int childLeft = lp.x; 143 int childTop = lp.y; 144 child.layout(childLeft, childTop, childLeft + lp.width, childTop + lp.height); 145 146 if (lp.dropped) { 147 lp.dropped = false; 148 149 final int[] cellXY = mTmpCellXY; 150 getLocationOnScreen(cellXY); 151 mWallpaperManager.sendWallpaperCommand(getWindowToken(), 152 WallpaperManager.COMMAND_DROP, 153 cellXY[0] + childLeft + lp.width / 2, 154 cellXY[1] + childTop + lp.height / 2, 0, null); 155 } 156 } 157 } 158 } 159 160 @Override 161 public boolean shouldDelayChildPressedState() { 162 return false; 163 } 164 165 @Override 166 public void requestChildFocus(View child, View focused) { 167 super.requestChildFocus(child, focused); 168 if (child != null) { 169 Rect r = new Rect(); 170 child.getDrawingRect(r); 171 requestRectangleOnScreen(r); 172 } 173 } 174 175 @Override 176 public void cancelLongPress() { 177 super.cancelLongPress(); 178 179 // Cancel long press for all children 180 final int count = getChildCount(); 181 for (int i = 0; i < count; i++) { 182 final View child = getChildAt(i); 183 child.cancelLongPress(); 184 } 185 } 186 187 @Override 188 protected void setChildrenDrawingCacheEnabled(boolean enabled) { 189 final int count = getChildCount(); 190 for (int i = 0; i < count; i++) { 191 final View view = getChildAt(i); 192 view.setDrawingCacheEnabled(enabled); 193 // Update the drawing caches 194 if (!view.isHardwareAccelerated() && enabled) { 195 view.buildDrawingCache(true); 196 } 197 } 198 } 199 200 @Override 201 protected void setChildrenDrawnWithCacheEnabled(boolean enabled) { 202 super.setChildrenDrawnWithCacheEnabled(enabled); 203 } 204 } 205
