DelegateViewHelper.java revision 12e0c5ac1b837d85c78221108b0d70417199bbbb 
1/*
2 * Copyright (C) 2010 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.systemui.statusbar;
18
19import android.util.Slog;
20import android.view.MotionEvent;
21import android.view.Surface;
22import android.view.View;
23
24import com.android.systemui.R;
25
26public class DelegateViewHelper {
27    private View mDelegateView;
28    private View mSourceView;
29    private BaseStatusBar mBar;
30    private int[] mTempPoint = new int[2];
31    private float[] mDownPoint = new float[2];
32    private int mOrientation;
33    private float mTriggerThreshhold;
34
35    public DelegateViewHelper(View sourceView) {
36        mSourceView = sourceView;
37        if (mSourceView != null) {
38            mTriggerThreshhold = mSourceView.getContext().getResources()
39                    .getDimension(R.dimen.navbar_search_up_threshhold);
40        }
41    }
42
43    public void setDelegateView(View view) {
44        mDelegateView = view;
45    }
46
47    public void setBar(BaseStatusBar phoneStatusBar) {
48        mBar = phoneStatusBar;
49    }
50
51    public void setOrientation(int orientation) {
52        mOrientation = orientation;
53    }
54
55    public boolean onInterceptTouchEvent(MotionEvent event) {
56        if (mBar.shouldDisableNavbarGestures()) {
57            return false;
58        }
59        switch (event.getAction()) {
60            case MotionEvent.ACTION_DOWN:
61                mDownPoint[0] = event.getX();
62                mDownPoint[1] = event.getY();
63                break;
64        }
65        if (mDelegateView != null) {
66            if (mDelegateView.getVisibility() != View.VISIBLE
67                    && event.getAction() != MotionEvent.ACTION_CANCEL) {
68                final boolean isVertical = (mOrientation == Surface.ROTATION_90
69                        || mOrientation == Surface.ROTATION_270);
70                final int historySize = event.getHistorySize();
71                for (int k = 0; k < historySize + 1; k++) {
72                    float x = k < historySize ? event.getHistoricalX(k) : event.getX();
73                    float y = k < historySize ? event.getHistoricalY(k) : event.getY();
74                    final float distance = isVertical ? (mDownPoint[0] - x) : (mDownPoint[1] - y);
75                    if (distance > mTriggerThreshhold) {
76                        mBar.showSearchPanel();
77                        break;
78                    }
79                }
80            }
81            mSourceView.getLocationOnScreen(mTempPoint);
82            float deltaX = mTempPoint[0];
83            float deltaY = mTempPoint[1];
84
85            mDelegateView.getLocationOnScreen(mTempPoint);
86            deltaX -= mTempPoint[0];
87            deltaY -= mTempPoint[1];
88
89            event.offsetLocation(deltaX, deltaY);
90            mDelegateView.dispatchTouchEvent(event);
91            event.offsetLocation(-deltaX, -deltaY);
92        }
93        return false;
94    }
95}