| /* |
| * Copyright (C) 2013 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.server.wm; |
| |
| import android.graphics.Region; |
| import android.view.DisplayInfo; |
| import android.view.MotionEvent; |
| import android.view.WindowManagerPolicy.PointerEventListener; |
| |
| import com.android.server.wm.WindowManagerService.H; |
| |
| public class StackTapPointerEventListener implements PointerEventListener { |
| private static final int TAP_TIMEOUT_MSEC = 300; |
| private static final float TAP_MOTION_SLOP_INCHES = 0.125f; |
| |
| private final int mMotionSlop; |
| private float mDownX; |
| private float mDownY; |
| private int mPointerId; |
| final private Region mTouchExcludeRegion; |
| private final WindowManagerService mService; |
| private final DisplayContent mDisplayContent; |
| |
| public StackTapPointerEventListener(WindowManagerService service, |
| DisplayContent displayContent) { |
| mService = service; |
| mDisplayContent = displayContent; |
| mTouchExcludeRegion = displayContent.mTouchExcludeRegion; |
| DisplayInfo info = displayContent.getDisplayInfo(); |
| mMotionSlop = (int)(info.logicalDensityDpi * TAP_MOTION_SLOP_INCHES); |
| } |
| |
| @Override |
| public void onPointerEvent(MotionEvent motionEvent) { |
| final int action = motionEvent.getAction(); |
| switch (action & MotionEvent.ACTION_MASK) { |
| case MotionEvent.ACTION_DOWN: |
| mPointerId = motionEvent.getPointerId(0); |
| mDownX = motionEvent.getX(); |
| mDownY = motionEvent.getY(); |
| break; |
| case MotionEvent.ACTION_MOVE: |
| if (mPointerId >= 0) { |
| int index = motionEvent.findPointerIndex(mPointerId); |
| if ((motionEvent.getEventTime() - motionEvent.getDownTime()) > TAP_TIMEOUT_MSEC |
| || index < 0 |
| || (motionEvent.getX(index) - mDownX) > mMotionSlop |
| || (motionEvent.getY(index) - mDownY) > mMotionSlop) { |
| mPointerId = -1; |
| } |
| } |
| break; |
| case MotionEvent.ACTION_UP: |
| case MotionEvent.ACTION_POINTER_UP: { |
| int index = (action & MotionEvent.ACTION_POINTER_INDEX_MASK) |
| >> MotionEvent.ACTION_POINTER_INDEX_SHIFT; |
| // Extract the index of the pointer that left the touch sensor |
| if (mPointerId == motionEvent.getPointerId(index)) { |
| final int x = (int)motionEvent.getX(index); |
| final int y = (int)motionEvent.getY(index); |
| if ((motionEvent.getEventTime() - motionEvent.getDownTime()) |
| < TAP_TIMEOUT_MSEC |
| && (x - mDownX) < mMotionSlop && (y - mDownY) < mMotionSlop |
| && !mTouchExcludeRegion.contains(x, y)) { |
| mService.mH.obtainMessage(H.TAP_OUTSIDE_STACK, x, y, |
| mDisplayContent).sendToTarget(); |
| } |
| mPointerId = -1; |
| } |
| break; |
| } |
| } |
| } |
| } |