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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/*
* 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 android.widget;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
public class ButtonGroup extends LinearLayout {
private Drawable mDivider;
private Drawable mButtonBackground;
private int mShowDividers;
/**
* Don't show any dividers.
*/
public static final int SHOW_DIVIDER_NONE = 0;
/**
* Show a divider at the beginning of the group.
*/
public static final int SHOW_DIVIDER_BEGINNING = 1;
/**
* Show dividers between each item in the group.
*/
public static final int SHOW_DIVIDER_MIDDLE = 2;
/**
* Show a divider at the end of the group.
*/
public static final int SHOW_DIVIDER_END = 4;
public ButtonGroup(Context context) {
this(context, null);
}
public ButtonGroup(Context context, AttributeSet attrs) {
this(context, attrs, com.android.internal.R.attr.buttonGroupStyle);
}
public ButtonGroup(Context context, AttributeSet attrs, int defStyleRes) {
super(context, attrs, defStyleRes);
TypedArray a = context.obtainStyledAttributes(attrs,
com.android.internal.R.styleable.ButtonGroup, defStyleRes, 0);
mDivider = a.getDrawable(com.android.internal.R.styleable.ButtonGroup_divider);
mButtonBackground = a.getDrawable(
com.android.internal.R.styleable.ButtonGroup_buttonBackground);
mShowDividers = a.getInt(com.android.internal.R.styleable.ButtonGroup_showDividers,
SHOW_DIVIDER_MIDDLE);
a.recycle();
}
/**
* Set how dividers should be shown between items in this button group.
*
* @param showDividers One or more of {@link #SHOW_DIVIDER_BEGINNING},
* {@link #SHOW_DIVIDER_MIDDLE}, or {@link #SHOW_DIVIDER_END},
* or {@link #SHOW_DIVIDER_NONE} to show no dividers.
*/
public void setShowDividers(int showDividers) {
mShowDividers = showDividers;
}
/**
* @return A flag set indicating how dividers should be shown around items.
* @see #setShowDividers(int)
*/
public int getShowDividers() {
return mShowDividers;
}
@Override
public void addView(View child, int index, ViewGroup.LayoutParams params) {
if (!hasDividerBefore(index)) {
if (((getChildCount() > 0
&& (mShowDividers & SHOW_DIVIDER_MIDDLE) == SHOW_DIVIDER_MIDDLE)
|| (mShowDividers & SHOW_DIVIDER_BEGINNING) == SHOW_DIVIDER_BEGINNING)) {
super.addView(new DividerView(mContext), index, makeDividerLayoutParams());
if (index >= 0) {
index++;
}
}
}
// Preserve original padding as we change the background
final int paddingLeft = child.getPaddingLeft();
final int paddingRight = child.getPaddingRight();
final int paddingTop = child.getPaddingTop();
final int paddingBottom = child.getPaddingBottom();
child.setBackgroundDrawable(mButtonBackground);
child.setPadding(paddingLeft, paddingTop, paddingRight, paddingBottom);
final boolean isLast = index < 0 || index == getChildCount();
super.addView(child, index, params);
if (index >= 0) {
index++;
}
if ((isLast && (mShowDividers & SHOW_DIVIDER_END) == SHOW_DIVIDER_END) ||
((mShowDividers & SHOW_DIVIDER_MIDDLE) == SHOW_DIVIDER_MIDDLE &&
!(getChildAt(index) instanceof DividerView))) {
super.addView(new DividerView(mContext), index, makeDividerLayoutParams());
}
}
private boolean hasDividerBefore(int index) {
if (index == -1) {
index = getChildCount();
}
index--;
if (index < 0) {
return false;
}
return getChildAt(index) instanceof DividerView;
}
private LayoutParams makeDividerLayoutParams() {
return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
}
private class DividerView extends ImageView {
public DividerView(Context context) {
super(context);
setImageDrawable(mDivider);
setScaleType(ImageView.ScaleType.FIT_XY);
}
}
}
|
