1/*
2 * Copyright (C) 2012 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.internal.policy.impl.keyguard;
18
19import android.view.MotionEvent;
20import android.view.View;
21import android.view.ViewConfiguration;
22
23public class CheckLongPressHelper {
24    private View mView;
25    private boolean mHasPerformedLongPress;
26    private CheckForLongPress mPendingCheckForLongPress;
27    private float mDownX, mDownY;
28    private int mLongPressTimeout;
29    private int mScaledTouchSlop;
30
31    class CheckForLongPress implements Runnable {
32        public void run() {
33            if ((mView.getParent() != null) && mView.hasWindowFocus()
34                    && !mHasPerformedLongPress) {
35                if (mView.performLongClick()) {
36                    mView.setPressed(false);
37                    mHasPerformedLongPress = true;
38                }
39            }
40        }
41    }
42
43    public CheckLongPressHelper(View v) {
44        mScaledTouchSlop = ViewConfiguration.get(v.getContext()).getScaledTouchSlop();
45        mLongPressTimeout = ViewConfiguration.getLongPressTimeout();
46        mView = v;
47    }
48
49    public void postCheckForLongPress(MotionEvent ev) {
50        mDownX = ev.getX();
51        mDownY = ev.getY();
52        mHasPerformedLongPress = false;
53
54        if (mPendingCheckForLongPress == null) {
55            mPendingCheckForLongPress = new CheckForLongPress();
56        }
57        mView.postDelayed(mPendingCheckForLongPress, mLongPressTimeout);
58    }
59
60    public void onMove(MotionEvent ev) {
61        float x = ev.getX();
62        float y = ev.getY();
63        boolean xMoved = Math.abs(mDownX - x) > mScaledTouchSlop;
64        boolean yMoved = Math.abs(mDownY - y) > mScaledTouchSlop;
65
66        if (xMoved || yMoved) {
67            cancelLongPress();
68        }
69    }
70
71    public void cancelLongPress() {
72        mHasPerformedLongPress = false;
73        if (mPendingCheckForLongPress != null) {
74            mView.removeCallbacks(mPendingCheckForLongPress);
75            mPendingCheckForLongPress = null;
76        }
77    }
78
79    public boolean hasPerformedLongPress() {
80        return mHasPerformedLongPress;
81    }
82}
83