HeadsUpTouchHelper.java revision 684a442b812a5e95d813700ffa2fd17ca72048a7
1/* 2 * Copyright (C) 2015 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.systemui.statusbar.phone; 18 19import android.content.Context; 20import android.view.MotionEvent; 21import android.view.ViewConfiguration; 22 23import com.android.systemui.Gefingerpoken; 24import com.android.systemui.statusbar.ExpandableNotificationRow; 25import com.android.systemui.statusbar.ExpandableView; 26import com.android.systemui.statusbar.policy.HeadsUpManager; 27import com.android.systemui.statusbar.stack.NotificationStackScrollLayout; 28 29/** 30 * A helper class to handle touches on the heads-up views. 31 */ 32public class HeadsUpTouchHelper implements Gefingerpoken { 33 34 private HeadsUpManager mHeadsUpManager; 35 private NotificationStackScrollLayout mStackScroller; 36 private int mTrackingPointer; 37 private float mTouchSlop; 38 private float mInitialTouchX; 39 private float mInitialTouchY; 40 private boolean mTouchingHeadsUpView; 41 private boolean mTrackingHeadsUp; 42 private boolean mCollapseSnoozes; 43 private NotificationPanelView mPanel; 44 private ExpandableNotificationRow mPickedChild; 45 46 public HeadsUpTouchHelper(HeadsUpManager headsUpManager, 47 NotificationStackScrollLayout stackScroller, 48 NotificationPanelView notificationPanelView) { 49 mHeadsUpManager = headsUpManager; 50 mStackScroller = stackScroller; 51 mPanel = notificationPanelView; 52 Context context = stackScroller.getContext(); 53 final ViewConfiguration configuration = ViewConfiguration.get(context); 54 mTouchSlop = configuration.getScaledTouchSlop(); 55 } 56 57 public boolean isTrackingHeadsUp() { 58 return mTrackingHeadsUp; 59 } 60 61 @Override 62 public boolean onInterceptTouchEvent(MotionEvent event) { 63 if (!mTouchingHeadsUpView && event.getActionMasked() != MotionEvent.ACTION_DOWN) { 64 return false; 65 } 66 int pointerIndex = event.findPointerIndex(mTrackingPointer); 67 if (pointerIndex < 0) { 68 pointerIndex = 0; 69 mTrackingPointer = event.getPointerId(pointerIndex); 70 } 71 final float x = event.getX(pointerIndex); 72 final float y = event.getY(pointerIndex); 73 switch (event.getActionMasked()) { 74 case MotionEvent.ACTION_DOWN: 75 mInitialTouchY = y; 76 mInitialTouchX = x; 77 setTrackingHeadsUp(false); 78 ExpandableView child = mStackScroller.getChildAtPosition(x, y); 79 mTouchingHeadsUpView = false; 80 if (child instanceof ExpandableNotificationRow) { 81 mPickedChild = (ExpandableNotificationRow) child; 82 mTouchingHeadsUpView = mPickedChild.isHeadsUp() && mPickedChild.isPinned(); 83 } 84 break; 85 case MotionEvent.ACTION_POINTER_UP: 86 final int upPointer = event.getPointerId(event.getActionIndex()); 87 if (mTrackingPointer == upPointer) { 88 // gesture is ongoing, find a new pointer to track 89 final int newIndex = event.getPointerId(0) != upPointer ? 0 : 1; 90 mTrackingPointer = event.getPointerId(newIndex); 91 mInitialTouchX = event.getX(newIndex); 92 mInitialTouchY = event.getY(newIndex); 93 } 94 break; 95 96 case MotionEvent.ACTION_MOVE: 97 final float h = y - mInitialTouchY; 98 if (Math.abs(h) > mTouchSlop && Math.abs(h) > Math.abs(x - mInitialTouchX)) { 99 setTrackingHeadsUp(true); 100 mCollapseSnoozes = h < 0; 101 mInitialTouchX = x; 102 mInitialTouchY = y; 103 int expandedHeight = mPickedChild.getActualHeight(); 104 mPanel.startExpandMotion(x, y, true /* startTracking */, expandedHeight); 105 return true; 106 } 107 break; 108 109 case MotionEvent.ACTION_CANCEL: 110 case MotionEvent.ACTION_UP: 111 if (mPickedChild != null && mTouchingHeadsUpView) { 112 // We may swallow this click if the heads up just came in. 113 if (mHeadsUpManager.shouldSwallowClick( 114 mPickedChild.getStatusBarNotification().getKey())) { 115 endMotion(); 116 return true; 117 } 118 } 119 endMotion(); 120 break; 121 } 122 return false; 123 } 124 125 private void setTrackingHeadsUp(boolean tracking) { 126 mTrackingHeadsUp = tracking; 127 mHeadsUpManager.setTrackingHeadsUp(tracking); 128 mPanel.setTrackingHeadsUp(tracking); 129 } 130 131 public void notifyFling(boolean collapse) { 132 if (collapse && mCollapseSnoozes) { 133 mHeadsUpManager.snooze(); 134 } 135 mCollapseSnoozes = false; 136 } 137 138 @Override 139 public boolean onTouchEvent(MotionEvent event) { 140 if (!mTrackingHeadsUp) { 141 return false; 142 } 143 switch (event.getActionMasked()) { 144 case MotionEvent.ACTION_UP: 145 case MotionEvent.ACTION_CANCEL: 146 endMotion(); 147 setTrackingHeadsUp(false); 148 break; 149 } 150 return true; 151 } 152 153 private void endMotion() { 154 mTrackingPointer = -1; 155 mPickedChild = null; 156 mTouchingHeadsUpView = false; 157 } 158} 159