1 package com.android.dialer.list; 2 3 import android.util.Log; 4 import android.view.View; 5 6 import com.android.contacts.common.compat.CompatUtils; 7 8 import java.util.ArrayList; 9 import java.util.List; 10 11 /** 12 * Class that handles and combines drag events generated from multiple views, and then fires 13 * off events to any OnDragDropListeners that have registered for callbacks. 14 */ 15 public class DragDropController { 16 17 private final List<OnDragDropListener> mOnDragDropListeners = 18 new ArrayList<OnDragDropListener>(); 19 private final DragItemContainer mDragItemContainer; 20 private final int[] mLocationOnScreen = new int[2]; 21 22 /** 23 * Callback interface used to retrieve views based on the current touch coordinates of the 24 * drag event. The {@link DragItemContainer} houses the draggable views that this 25 * {@link DragDropController} controls. 26 */ 27 public interface DragItemContainer { 28 public PhoneFavoriteSquareTileView getViewForLocation(int x, int y); 29 } 30 31 public DragDropController(DragItemContainer dragItemContainer) { 32 mDragItemContainer = dragItemContainer; 33 } 34 35 /** 36 * @return True if the drag is started, false if the drag is cancelled for some reason. 37 */ 38 boolean handleDragStarted(View v, int x, int y) { 39 int screenX = x; 40 int screenY = y; 41 // The coordinates in dragEvent of DragEvent.ACTION_DRAG_STARTED before NYC is window-related. 42 // This is fixed in NYC. 43 if (CompatUtils.isNCompatible()) { 44 v.getLocationOnScreen(mLocationOnScreen); 45 screenX = x + mLocationOnScreen[0]; 46 screenY = y + mLocationOnScreen[1]; 47 } 48 final PhoneFavoriteSquareTileView tileView = mDragItemContainer.getViewForLocation( 49 screenX, screenY); 50 if (tileView == null) { 51 return false; 52 } 53 for (int i = 0; i < mOnDragDropListeners.size(); i++) { 54 mOnDragDropListeners.get(i).onDragStarted(screenX, screenY, tileView); 55 } 56 57 return true; 58 } 59 60 public void handleDragHovered(View v, int x, int y) { 61 v.getLocationOnScreen(mLocationOnScreen); 62 final int screenX = x + mLocationOnScreen[0]; 63 final int screenY = y + mLocationOnScreen[1]; 64 final PhoneFavoriteSquareTileView view = mDragItemContainer.getViewForLocation( 65 screenX, screenY); 66 for (int i = 0; i < mOnDragDropListeners.size(); i++) { 67 mOnDragDropListeners.get(i).onDragHovered(screenX, screenY, view); 68 } 69 } 70 71 public void handleDragFinished(int x, int y, boolean isRemoveView) { 72 if (isRemoveView) { 73 for (int i = 0; i < mOnDragDropListeners.size(); i++) { 74 mOnDragDropListeners.get(i).onDroppedOnRemove(); 75 } 76 } 77 78 for (int i = 0; i < mOnDragDropListeners.size(); i++) { 79 mOnDragDropListeners.get(i).onDragFinished(x, y); 80 } 81 } 82 83 public void addOnDragDropListener(OnDragDropListener listener) { 84 if (!mOnDragDropListeners.contains(listener)) { 85 mOnDragDropListeners.add(listener); 86 } 87 } 88 89 public void removeOnDragDropListener(OnDragDropListener listener) { 90 if (mOnDragDropListeners.contains(listener)) { 91 mOnDragDropListeners.remove(listener); 92 } 93 } 94 95 } 96
