1 /* 2 * Copyright (C) 2011 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.content.Context; 20 import android.view.MotionEvent; 21 import android.view.View; 22 import android.widget.FrameLayout; 23 import android.widget.GridLayout; 24 25 /** 26 * The grid based layout used strictly for the widget/wallpaper tab of the AppsCustomize pane 27 */ 28 public class PagedViewGridLayout extends GridLayout implements Page { 29 static final String TAG = "PagedViewGridLayout"; 30 31 private int mCellCountX; 32 private int mCellCountY; 33 PagedViewGridLayout(Context context, int cellCountX, int cellCountY)34 public PagedViewGridLayout(Context context, int cellCountX, int cellCountY) { 35 super(context, null, 0); 36 mCellCountX = cellCountX; 37 mCellCountY = cellCountY; 38 } 39 getCellCountX()40 int getCellCountX() { 41 return mCellCountX; 42 } 43 getCellCountY()44 int getCellCountY() { 45 return mCellCountY; 46 } 47 onMeasure(int widthMeasureSpec, int heightMeasureSpec)48 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 49 // PagedView currently has issues with different-sized pages since it calculates the 50 // offset of each page to scroll to before it updates the actual size of each page 51 // (which can change depending on the content if the contents aren't a fixed size). 52 // We work around this by having a minimum size on each widget page). 53 int widthSpecSize = Math.min(getSuggestedMinimumWidth(), 54 MeasureSpec.getSize(widthMeasureSpec)); 55 int widthSpecMode = MeasureSpec.EXACTLY; 56 super.onMeasure(MeasureSpec.makeMeasureSpec(widthSpecSize, widthSpecMode), 57 heightMeasureSpec); 58 } 59 60 @Override onTouchEvent(MotionEvent event)61 public boolean onTouchEvent(MotionEvent event) { 62 boolean result = super.onTouchEvent(event); 63 int count = getPageChildCount(); 64 if (count > 0) { 65 // We only intercept the touch if we are tapping in empty space after the final row 66 View child = getChildOnPageAt(count - 1); 67 int bottom = child.getBottom(); 68 result = result || (event.getY() < bottom); 69 } 70 return result; 71 } 72 destroyHardwareLayer()73 void destroyHardwareLayer() { 74 setLayerType(LAYER_TYPE_NONE, null); 75 } 76 createHardwareLayer()77 void createHardwareLayer() { 78 setLayerType(LAYER_TYPE_HARDWARE, null); 79 } 80 81 @Override removeAllViewsOnPage()82 public void removeAllViewsOnPage() { 83 removeAllViews(); 84 destroyHardwareLayer(); 85 } 86 87 @Override removeViewOnPageAt(int index)88 public void removeViewOnPageAt(int index) { 89 removeViewAt(index); 90 } 91 92 @Override getPageChildCount()93 public int getPageChildCount() { 94 return getChildCount(); 95 } 96 97 @Override getChildOnPageAt(int i)98 public View getChildOnPageAt(int i) { 99 return getChildAt(i); 100 } 101 102 @Override indexOfChildOnPage(View v)103 public int indexOfChildOnPage(View v) { 104 return indexOfChild(v); 105 } 106 107 public static class LayoutParams extends FrameLayout.LayoutParams { LayoutParams(int width, int height)108 public LayoutParams(int width, int height) { 109 super(width, height); 110 } 111 } 112 } 113