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.R; 25 import com.android.systemui.statusbar.ExpandableNotificationRow; 26 import com.android.systemui.statusbar.ExpandableView; 27 import com.android.systemui.statusbar.policy.HeadsUpManager; 28 import com.android.systemui.statusbar.stack.NotificationStackScrollLayout; 29 30 /** 31 * A helper class to handle touches on the heads-up views. 32 */ 33 public class HeadsUpTouchHelper implements Gefingerpoken { 34 35 private HeadsUpManager mHeadsUpManager; 36 private NotificationStackScrollLayout mStackScroller; 37 private int mTrackingPointer; 38 private float mTouchSlop; 39 private float mInitialTouchX; 40 private float mInitialTouchY; 41 private boolean mTouchingHeadsUpView; 42 private boolean mTrackingHeadsUp; 43 private boolean mCollapseSnoozes; 44 private NotificationPanelView mPanel; 45 private ExpandableNotificationRow mPickedChild; 46 private final int mNotificationsTopPadding; 47 48 public HeadsUpTouchHelper(HeadsUpManager headsUpManager, 49 NotificationStackScrollLayout stackScroller, 50 NotificationPanelView notificationPanelView) { 51 mHeadsUpManager = headsUpManager; 52 mStackScroller = stackScroller; 53 mPanel = notificationPanelView; 54 Context context = stackScroller.getContext(); 55 final ViewConfiguration configuration = ViewConfiguration.get(context); 56 mTouchSlop = configuration.getScaledTouchSlop(); 57 mNotificationsTopPadding = context.getResources() 58 .getDimensionPixelSize(R.dimen.notifications_top_padding); 59 } 60 61 public boolean isTrackingHeadsUp() { 62 return mTrackingHeadsUp; 63 } 64 65 @Override 66 public boolean onInterceptTouchEvent(MotionEvent event) { 67 if (!mTouchingHeadsUpView && event.getActionMasked() != MotionEvent.ACTION_DOWN) { 68 return false; 69 } 70 int pointerIndex = event.findPointerIndex(mTrackingPointer); 71 if (pointerIndex < 0) { 72 pointerIndex = 0; 73 mTrackingPointer = event.getPointerId(pointerIndex); 74 } 75 final float x = event.getX(pointerIndex); 76 final float y = event.getY(pointerIndex); 77 switch (event.getActionMasked()) { 78 case MotionEvent.ACTION_DOWN: 79 mInitialTouchY = y; 80 mInitialTouchX = x; 81 setTrackingHeadsUp(false); 82 ExpandableView child = mStackScroller.getChildAtRawPosition(x, y); 83 if (child == null && y < mNotificationsTopPadding) { 84 // We should also allow drags from the margin above the heads up 85 child = mStackScroller.getChildAtRawPosition(x, y + mNotificationsTopPadding); 86 } 87 mTouchingHeadsUpView = false; 88 if (child instanceof ExpandableNotificationRow) { 89 mPickedChild = (ExpandableNotificationRow) child; 90 mTouchingHeadsUpView = mPickedChild.isHeadsUp() && mPickedChild.isPinned(); 91 } 92 break; 93 case MotionEvent.ACTION_POINTER_UP: 94 final int upPointer = event.getPointerId(event.getActionIndex()); 95 if (mTrackingPointer == upPointer) { 96 // gesture is ongoing, find a new pointer to track 97 final int newIndex = event.getPointerId(0) != upPointer ? 0 : 1; 98 mTrackingPointer = event.getPointerId(newIndex); 99 mInitialTouchX = event.getX(newIndex); 100 mInitialTouchY = event.getY(newIndex); 101 } 102 break; 103 104 case MotionEvent.ACTION_MOVE: 105 final float h = y - mInitialTouchY; 106 if (mTouchingHeadsUpView && Math.abs(h) > mTouchSlop 107 && Math.abs(h) > Math.abs(x - mInitialTouchX)) { 108 setTrackingHeadsUp(true); 109 mCollapseSnoozes = h < 0; 110 mInitialTouchX = x; 111 mInitialTouchY = y; 112 int expandedHeight = mPickedChild.getActualHeight(); 113 mPanel.setPanelScrimMinFraction((float) expandedHeight 114 / mPanel.getMaxPanelHeight()); 115 mPanel.startExpandMotion(x, y, true /* startTracking */, expandedHeight 116 + mNotificationsTopPadding); 117 mPanel.clearNotificattonEffects(); 118 mHeadsUpManager.unpinAll(); 119 return true; 120 } 121 break; 122 123 case MotionEvent.ACTION_CANCEL: 124 case MotionEvent.ACTION_UP: 125 if (mPickedChild != null && mTouchingHeadsUpView) { 126 // We may swallow this click if the heads up just came in. 127 if (mHeadsUpManager.shouldSwallowClick( 128 mPickedChild.getStatusBarNotification().getKey())) { 129 endMotion(); 130 return true; 131 } 132 } 133 endMotion(); 134 break; 135 } 136 return false; 137 } 138 139 private void setTrackingHeadsUp(boolean tracking) { 140 mTrackingHeadsUp = tracking; 141 mHeadsUpManager.setTrackingHeadsUp(tracking); 142 mPanel.setTrackingHeadsUp(tracking); 143 } 144 145 public void notifyFling(boolean collapse) { 146 if (collapse && mCollapseSnoozes) { 147 mHeadsUpManager.snooze(); 148 } 149 mCollapseSnoozes = false; 150 } 151 152 @Override 153 public boolean onTouchEvent(MotionEvent event) { 154 if (!mTrackingHeadsUp) { 155 return false; 156 } 157 switch (event.getActionMasked()) { 158 case MotionEvent.ACTION_UP: 159 case MotionEvent.ACTION_CANCEL: 160 endMotion(); 161 setTrackingHeadsUp(false); 162 break; 163 } 164 return true; 165 } 166 167 private void endMotion() { 168 mTrackingPointer = -1; 169 mPickedChild = null; 170 mTouchingHeadsUpView = false; 171 } 172 } 173
