1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
/*
* Copyright (C) 2010 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.providers.downloads.ui;
import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.CheckBox;
import android.widget.RelativeLayout;
/**
* This class customizes RelativeLayout to directly handle clicks on the left part of the view and
* treat them at clicks on the checkbox. This makes rapid selection of many items easier. This class
* also keeps an ID associated with the currently displayed download and notifies a listener upon
* selection changes with that ID.
*/
public class DownloadItem extends RelativeLayout {
private static float CHECKMARK_AREA = -1;
private boolean mIsInDownEvent = false;
private CheckBox mCheckBox;
private long mDownloadId;
private DownloadSelectListener mListener;
static interface DownloadSelectListener {
public void onDownloadSelectionChanged(long downloadId, boolean isSelected);
public boolean isDownloadSelected(long id);
}
public DownloadItem(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
initialize();
}
public DownloadItem(Context context, AttributeSet attrs) {
super(context, attrs);
initialize();
}
public DownloadItem(Context context) {
super(context);
initialize();
}
private void initialize() {
if (CHECKMARK_AREA == -1) {
CHECKMARK_AREA = getResources().getDimensionPixelSize(R.dimen.checkmark_area);
}
}
@Override
protected void onFinishInflate() {
super.onFinishInflate();
mCheckBox = (CheckBox) findViewById(R.id.download_checkbox);
}
public void setDownloadId(long downloadId) {
mDownloadId = downloadId;
}
public void setSelectListener(DownloadSelectListener listener) {
mListener = listener;
}
@Override
public boolean onTouchEvent(MotionEvent event) {
boolean handled = false;
switch(event.getAction()) {
case MotionEvent.ACTION_DOWN:
if (event.getX() < CHECKMARK_AREA) {
mIsInDownEvent = true;
handled = true;
}
break;
case MotionEvent.ACTION_CANCEL:
mIsInDownEvent = false;
break;
case MotionEvent.ACTION_UP:
if (mIsInDownEvent && event.getX() < CHECKMARK_AREA) {
toggleCheckMark();
handled = true;
}
mIsInDownEvent = false;
break;
}
if (handled) {
postInvalidate();
} else {
handled = super.onTouchEvent(event);
}
return handled;
}
private void toggleCheckMark() {
mCheckBox.toggle();
mListener.onDownloadSelectionChanged(mDownloadId, mCheckBox.isChecked());
}
}
|
