DragLayer.java revision d1837cc69eb222371afdd30890f7215d117510f2
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 17package com.android.launcher2; 18 19import com.android.launcher.R; 20 21import android.content.Context; 22import android.graphics.Bitmap; 23import android.util.AttributeSet; 24import android.view.KeyEvent; 25import android.view.MotionEvent; 26import android.view.View; 27import android.widget.FrameLayout; 28import android.widget.ImageView; 29 30/** 31 * A ViewGroup that coordinates dragging across its descendants 32 */ 33public class DragLayer extends FrameLayout { 34 private DragController mDragController; 35 private int[] mTmpXY = new int[2]; 36 37 /** 38 * Used to create a new DragLayer from XML. 39 * 40 * @param context The application's context. 41 * @param attrs The attributes set containing the Workspace's customization values. 42 */ 43 public DragLayer(Context context, AttributeSet attrs) { 44 super(context, attrs); 45 46 // Disable multitouch across the workspace/all apps/customize tray 47 setMotionEventSplittingEnabled(false); 48 } 49 50 public void setDragController(DragController controller) { 51 mDragController = controller; 52 } 53 54 @Override 55 public boolean dispatchKeyEvent(KeyEvent event) { 56 return mDragController.dispatchKeyEvent(event) || super.dispatchKeyEvent(event); 57 } 58 59 @Override 60 public boolean onInterceptTouchEvent(MotionEvent ev) { 61 // If the current CellLayoutChildren has a resize frame, we need to detect if any touch 62 // event has occurred which doesn't result in resizing a widget. In this case, we 63 // dismiss any visible resize frames. 64 final Workspace w = (Workspace) findViewById(R.id.workspace); 65 if (w != null) { 66 final CellLayout currentPage = (CellLayout) w.getChildAt(w.getCurrentPage()); 67 final CellLayoutChildren childrenLayout = currentPage.getChildrenLayout(); 68 69 if (childrenLayout.hasResizeFrames() && !childrenLayout.isWidgetBeingResized()) { 70 post(new Runnable() { 71 public void run() { 72 if (!childrenLayout.isWidgetBeingResized()) { 73 childrenLayout.clearAllResizeFrames(); 74 } 75 } 76 }); 77 } 78 } 79 return mDragController.onInterceptTouchEvent(ev); 80 } 81 82 @Override 83 public boolean onTouchEvent(MotionEvent ev) { 84 return mDragController.onTouchEvent(ev); 85 } 86 87 @Override 88 public boolean dispatchUnhandledMove(View focused, int direction) { 89 return mDragController.dispatchUnhandledMove(focused, direction); 90 } 91 92 public View createDragView(Bitmap b, int xPos, int yPos) { 93 ImageView imageView = new ImageView(mContext); 94 imageView.setImageBitmap(b); 95 imageView.setX(xPos); 96 imageView.setY(yPos); 97 addView(imageView, b.getWidth(), b.getHeight()); 98 99 return imageView; 100 } 101 102 public View createDragView(View v) { 103 v.getLocationOnScreen(mTmpXY); 104 return createDragView(mDragController.getViewBitmap(v), mTmpXY[0], mTmpXY[1]); 105 } 106} 107