1/*
2 * Copyright (C) 2011 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.launcher3;
18
19import android.content.Context;
20import android.view.MotionEvent;
21import android.view.View;
22import android.widget.FrameLayout;
23import android.widget.GridLayout;
24
25/**
26 * The grid based layout used strictly for the widget/wallpaper tab of the AppsCustomize pane
27 */
28public class PagedViewGridLayout extends GridLayout implements Page {
29    static final String TAG = "PagedViewGridLayout";
30
31    private int mCellCountX;
32    private int mCellCountY;
33    private Runnable mOnLayoutListener;
34
35    public PagedViewGridLayout(Context context, int cellCountX, int cellCountY) {
36        super(context, null, 0);
37        mCellCountX = cellCountX;
38        mCellCountY = cellCountY;
39    }
40
41    int getCellCountX() {
42        return mCellCountX;
43    }
44
45    int getCellCountY() {
46        return mCellCountY;
47    }
48
49    /**
50     * Clears all the key listeners for the individual widgets.
51     */
52    public void resetChildrenOnKeyListeners() {
53        int childCount = getChildCount();
54        for (int j = 0; j < childCount; ++j) {
55            getChildAt(j).setOnKeyListener(null);
56        }
57    }
58
59    @Override
60    protected void onDetachedFromWindow() {
61        super.onDetachedFromWindow();
62        mOnLayoutListener = null;
63    }
64
65    public void setOnLayoutListener(Runnable r) {
66        mOnLayoutListener = r;
67    }
68
69    protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
70        super.onLayout(changed, left, top, right, bottom);
71        if (mOnLayoutListener != null) {
72            mOnLayoutListener.run();
73        }
74    }
75
76    @Override
77    public boolean onTouchEvent(MotionEvent event) {
78        boolean result = super.onTouchEvent(event);
79        int count = getPageChildCount();
80        if (count > 0) {
81            // We only intercept the touch if we are tapping in empty space after the final row
82            View child = getChildOnPageAt(count - 1);
83            int bottom = child.getBottom();
84            result = result || (event.getY() < bottom);
85        }
86        return result;
87    }
88
89    @Override
90    public void removeAllViewsOnPage() {
91        removeAllViews();
92        mOnLayoutListener = null;
93        setLayerType(LAYER_TYPE_NONE, null);
94    }
95
96    @Override
97    public void removeViewOnPageAt(int index) {
98        removeViewAt(index);
99    }
100
101    @Override
102    public int getPageChildCount() {
103        return getChildCount();
104    }
105
106    @Override
107    public View getChildOnPageAt(int i) {
108        return getChildAt(i);
109    }
110
111    @Override
112    public int indexOfChildOnPage(View v) {
113        return indexOfChild(v);
114    }
115
116    public static class LayoutParams extends FrameLayout.LayoutParams {
117        public LayoutParams(int width, int height) {
118            super(width, height);
119        }
120    }
121}
122