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 17 package com.android.systemui.statusbar.phone; 18 19 import android.content.Context; 20 import android.view.MotionEvent; 21 import android.view.ViewConfiguration; 22 23 import com.android.systemui.Gefingerpoken; 24 import com.android.systemui.statusbar.ExpandableNotificationRow; 25 import com.android.systemui.statusbar.ExpandableView; 26 import com.android.systemui.statusbar.policy.HeadsUpManager; 27 import com.android.systemui.statusbar.stack.NotificationStackScrollLayout; 28 29 /** 30 * A helper class to handle touches on the heads-up views. 31 */ 32 public 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.getChildAtRawPosition(x, y); 79 mTouchingHeadsUpView = false; 80 if (child instanceof ExpandableNotificationRow) { 81 mPickedChild = (ExpandableNotificationRow) child; 82 mTouchingHeadsUpView = !mStackScroller.isExpanded() 83 && mPickedChild.isHeadsUp() && mPickedChild.isPinned(); 84 } 85 break; 86 case MotionEvent.ACTION_POINTER_UP: 87 final int upPointer = event.getPointerId(event.getActionIndex()); 88 if (mTrackingPointer == upPointer) { 89 // gesture is ongoing, find a new pointer to track 90 final int newIndex = event.getPointerId(0) != upPointer ? 0 : 1; 91 mTrackingPointer = event.getPointerId(newIndex); 92 mInitialTouchX = event.getX(newIndex); 93 mInitialTouchY = event.getY(newIndex); 94 } 95 break; 96 97 case MotionEvent.ACTION_MOVE: 98 final float h = y - mInitialTouchY; 99 if (mTouchingHeadsUpView && Math.abs(h) > mTouchSlop 100 && Math.abs(h) > Math.abs(x - mInitialTouchX)) { 101 setTrackingHeadsUp(true); 102 mCollapseSnoozes = h < 0; 103 mInitialTouchX = x; 104 mInitialTouchY = y; 105 int expandedHeight = mPickedChild.getActualHeight(); 106 mPanel.setPanelScrimMinFraction((float) expandedHeight 107 / mPanel.getMaxPanelHeight()); 108 mPanel.startExpandMotion(x, y, true /* startTracking */, expandedHeight); 109 // This call needs to be after the expansion start otherwise we will get a 110 // flicker of one frame as it's not expanded yet. 111 mHeadsUpManager.unpinAll(); 112 mPanel.clearNotificationEffects(); 113 return true; 114 } 115 break; 116 117 case MotionEvent.ACTION_CANCEL: 118 case MotionEvent.ACTION_UP: 119 if (mPickedChild != null && mTouchingHeadsUpView) { 120 // We may swallow this click if the heads up just came in. 121 if (mHeadsUpManager.shouldSwallowClick( 122 mPickedChild.getStatusBarNotification().getKey())) { 123 endMotion(); 124 return true; 125 } 126 } 127 endMotion(); 128 break; 129 } 130 return false; 131 } 132 133 private void setTrackingHeadsUp(boolean tracking) { 134 mTrackingHeadsUp = tracking; 135 mHeadsUpManager.setTrackingHeadsUp(tracking); 136 mPanel.setTrackingHeadsUp(tracking); 137 } 138 139 public void notifyFling(boolean collapse) { 140 if (collapse && mCollapseSnoozes) { 141 mHeadsUpManager.snooze(); 142 } 143 mCollapseSnoozes = false; 144 } 145 146 @Override 147 public boolean onTouchEvent(MotionEvent event) { 148 if (!mTrackingHeadsUp) { 149 return false; 150 } 151 switch (event.getActionMasked()) { 152 case MotionEvent.ACTION_UP: 153 case MotionEvent.ACTION_CANCEL: 154 endMotion(); 155 setTrackingHeadsUp(false); 156 break; 157 } 158 return true; 159 } 160 161 private void endMotion() { 162 mTrackingPointer = -1; 163 mPickedChild = null; 164 mTouchingHeadsUpView = false; 165 } 166 } 167
