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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License
*/
package com.android.systemui.statusbar.phone;
import android.content.Context;
import android.view.MotionEvent;
import android.view.ViewConfiguration;
import com.android.systemui.Gefingerpoken;
import com.android.systemui.statusbar.ExpandableNotificationRow;
import com.android.systemui.statusbar.ExpandableView;
import com.android.systemui.statusbar.policy.HeadsUpManager;
import com.android.systemui.statusbar.stack.NotificationStackScrollLayout;
/**
* A Helper class to handle touches on the heads-up views
*/
public class HeadsUpTouchHelper implements Gefingerpoken {
private HeadsUpManager mHeadsUpManager;
private NotificationStackScrollLayout mStackScroller;
private int mTrackingPointer;
private float mTouchSlop;
private float mInitialTouchX;
private float mInitialTouchY;
private boolean mMotionOnHeadsUpView;
private boolean mTrackingHeadsUp;
private boolean mCollapseSnoozes;
private NotificationPanelView mPanel;
private ExpandableNotificationRow mPickedChild;
public boolean isTrackingHeadsUp() {
return mTrackingHeadsUp;
}
@Override
public boolean onInterceptTouchEvent(MotionEvent event) {
if (!mMotionOnHeadsUpView && event.getActionMasked() != MotionEvent.ACTION_DOWN) {
return false;
}
int pointerIndex = event.findPointerIndex(mTrackingPointer);
if (pointerIndex < 0) {
pointerIndex = 0;
mTrackingPointer = event.getPointerId(pointerIndex);
}
final float x = event.getX(pointerIndex);
final float y = event.getY(pointerIndex);
switch (event.getActionMasked()) {
case MotionEvent.ACTION_DOWN:
mInitialTouchY = y;
mInitialTouchX = x;
setTrackingHeadsUp(false);
ExpandableView child = mStackScroller.getChildAtPosition(x, y);
mMotionOnHeadsUpView = false;
if (child instanceof ExpandableNotificationRow) {
mPickedChild = (ExpandableNotificationRow) child;
mMotionOnHeadsUpView = mPickedChild.isHeadsUp() && !mPickedChild.isInShade();
}
break;
case MotionEvent.ACTION_POINTER_UP:
final int upPointer = event.getPointerId(event.getActionIndex());
if (mTrackingPointer == upPointer) {
// gesture is ongoing, find a new pointer to track
final int newIndex = event.getPointerId(0) != upPointer ? 0 : 1;
mTrackingPointer = event.getPointerId(newIndex);
mInitialTouchX = event.getX(newIndex);
mInitialTouchY = event.getY(newIndex);
}
break;
case MotionEvent.ACTION_MOVE:
final float h = y - mInitialTouchY;
if (Math.abs(h) > mTouchSlop && Math.abs(h) > Math.abs(x - mInitialTouchX)) {
setTrackingHeadsUp(true);
mCollapseSnoozes = h < 0;
mInitialTouchX = x;
mInitialTouchY = y;
int expandedHeight = mPickedChild.getActualHeight();
mPanel.startExpandMotion(x, y, true /* startTracking */, expandedHeight);
return true;
}
break;
case MotionEvent.ACTION_CANCEL:
case MotionEvent.ACTION_UP:
if (mPickedChild != null && mMotionOnHeadsUpView) {
if (mHeadsUpManager.shouldSwallowClick(
mPickedChild.getStatusBarNotification().getKey())) {
endMotion();
return true;
}
}
endMotion();
break;
}
return false;
}
private void setTrackingHeadsUp(boolean tracking) {
mTrackingHeadsUp = tracking;
mHeadsUpManager.setTrackingHeadsUp(tracking);
mPanel.setTrackingHeadsUp(tracking);
}
public void notifyFling(boolean collapse) {
if (collapse && mCollapseSnoozes) {
mHeadsUpManager.snooze();
}
mCollapseSnoozes = false;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
if (!mTrackingHeadsUp) {
return false;
}
switch (event.getActionMasked()) {
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
endMotion();
setTrackingHeadsUp(false);
break;
}
return true;
}
private void endMotion() {
mTrackingPointer = -1;
mPickedChild = null;
mMotionOnHeadsUpView = false;
}
public ExpandableView getPickedChild() {
return mPickedChild;
}
public void bind(HeadsUpManager headsUpManager, NotificationStackScrollLayout stackScroller,
NotificationPanelView notificationPanelView) {
mHeadsUpManager = headsUpManager;
mStackScroller = stackScroller;
mPanel = notificationPanelView;
Context context = stackScroller.getContext();
final ViewConfiguration configuration = ViewConfiguration.get(context);
mTouchSlop = configuration.getScaledTouchSlop();
}
}
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