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
|
/*
* Copyright (C) 2015 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.internal.widget;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.View;
import android.widget.ViewAnimator;
import java.util.ArrayList;
/**
* ViewAnimator with a more reasonable handling of MATCH_PARENT.
*/
public class DialogViewAnimator extends ViewAnimator {
private final ArrayList<View> mMatchParentChildren = new ArrayList<>(1);
public DialogViewAnimator(Context context) {
super(context);
}
public DialogViewAnimator(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
final boolean measureMatchParentChildren =
MeasureSpec.getMode(widthMeasureSpec) != MeasureSpec.EXACTLY ||
MeasureSpec.getMode(heightMeasureSpec) != MeasureSpec.EXACTLY;
int maxHeight = 0;
int maxWidth = 0;
int childState = 0;
// First measure all children and record maximum dimensions where the
// spec isn't MATCH_PARENT.
final int count = getChildCount();
for (int i = 0; i < count; i++) {
final View child = getChildAt(i);
if (getMeasureAllChildren() || child.getVisibility() != GONE) {
final LayoutParams lp = (LayoutParams) child.getLayoutParams();
final boolean matchWidth = lp.width == LayoutParams.MATCH_PARENT;
final boolean matchHeight = lp.height == LayoutParams.MATCH_PARENT;
if (measureMatchParentChildren && (matchWidth || matchHeight)) {
mMatchParentChildren.add(child);
}
measureChildWithMargins(child, widthMeasureSpec, 0, heightMeasureSpec, 0);
// Measured dimensions only count against the maximum
// dimensions if they're not MATCH_PARENT.
int state = 0;
if (measureMatchParentChildren && !matchWidth) {
maxWidth = Math.max(maxWidth, child.getMeasuredWidth()
+ lp.leftMargin + lp.rightMargin);
state |= child.getMeasuredWidthAndState() & MEASURED_STATE_MASK;
}
if (measureMatchParentChildren && !matchHeight) {
maxHeight = Math.max(maxHeight, child.getMeasuredHeight()
+ lp.topMargin + lp.bottomMargin);
state |= (child.getMeasuredHeightAndState() >> MEASURED_HEIGHT_STATE_SHIFT)
& (MEASURED_STATE_MASK >> MEASURED_HEIGHT_STATE_SHIFT);
}
childState = combineMeasuredStates(childState, state);
}
}
// Account for padding too.
maxWidth += getPaddingLeft() + getPaddingRight();
maxHeight += getPaddingTop() + getPaddingBottom();
// Check against our minimum height and width.
maxHeight = Math.max(maxHeight, getSuggestedMinimumHeight());
maxWidth = Math.max(maxWidth, getSuggestedMinimumWidth());
// Check against our foreground's minimum height and width.
final Drawable drawable = getForeground();
if (drawable != null) {
maxHeight = Math.max(maxHeight, drawable.getMinimumHeight());
maxWidth = Math.max(maxWidth, drawable.getMinimumWidth());
}
setMeasuredDimension(resolveSizeAndState(maxWidth, widthMeasureSpec, childState),
resolveSizeAndState(maxHeight, heightMeasureSpec,
childState << MEASURED_HEIGHT_STATE_SHIFT));
// Measure remaining MATCH_PARENT children again using real dimensions.
final int matchCount = mMatchParentChildren.size();
for (int i = 0; i < matchCount; i++) {
final View child = mMatchParentChildren.get(i);
final MarginLayoutParams lp = (MarginLayoutParams) child.getLayoutParams();
final int childWidthMeasureSpec;
if (lp.width == LayoutParams.MATCH_PARENT) {
childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(
getMeasuredWidth() - getPaddingLeft() - getPaddingRight()
- lp.leftMargin - lp.rightMargin,
MeasureSpec.EXACTLY);
} else {
childWidthMeasureSpec = getChildMeasureSpec(widthMeasureSpec,
getPaddingLeft() + getPaddingRight() + lp.leftMargin + lp.rightMargin,
lp.width);
}
final int childHeightMeasureSpec;
if (lp.height == LayoutParams.MATCH_PARENT) {
childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(
getMeasuredHeight() - getPaddingTop() - getPaddingBottom()
- lp.topMargin - lp.bottomMargin,
MeasureSpec.EXACTLY);
} else {
childHeightMeasureSpec = getChildMeasureSpec(heightMeasureSpec,
getPaddingTop() + getPaddingBottom() + lp.topMargin + lp.bottomMargin,
lp.height);
}
child.measure(childWidthMeasureSpec, childHeightMeasureSpec);
}
mMatchParentChildren.clear();
}
}
|
