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
|
/*
* 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.launcher3;
import android.content.Context;
import android.graphics.Rect;
import android.util.AttributeSet;
import android.widget.LinearLayout;
/**
* A base container view, which supports resizing.
*/
public abstract class BaseContainerView extends LinearLayout implements Insettable {
// The window insets
private Rect mInsets = new Rect();
// The bounds of the search bar. Only the left, top, right are used to inset the
// search bar and the height is determined by the measurement of the layout
private Rect mSearchBarBounds = new Rect();
// The bounds of the container
protected Rect mContentBounds = new Rect();
// The padding to apply to the container to achieve the bounds
protected Rect mContentPadding = new Rect();
// The inset to apply to the edges and between the search bar and the container
private int mContainerBoundsInset;
private boolean mHasSearchBar;
public BaseContainerView(Context context) {
this(context, null);
}
public BaseContainerView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public BaseContainerView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
mContainerBoundsInset = getResources().getDimensionPixelSize(R.dimen.container_bounds_inset);
}
@Override
final public void setInsets(Rect insets) {
mInsets.set(insets);
updateBackgroundAndPaddings();
}
protected void setHasSearchBar() {
mHasSearchBar = true;
}
/**
* Sets the search bar bounds for this container view to match.
*/
final public void setSearchBarBounds(Rect bounds) {
mSearchBarBounds.set(bounds);
// Post the updates since they can trigger a relayout, and this call can be triggered from
// a layout pass itself.
post(new Runnable() {
@Override
public void run() {
updateBackgroundAndPaddings();
}
});
}
/**
* Update the backgrounds and padding in response to a change in the bounds or insets.
*/
protected void updateBackgroundAndPaddings() {
Rect padding;
Rect searchBarBounds = new Rect(mSearchBarBounds);
if (mSearchBarBounds.isEmpty()) {
// Use the normal bounds
padding = new Rect(mInsets.left + mContainerBoundsInset,
(mHasSearchBar ? 0 : (mInsets.top + mContainerBoundsInset)),
mInsets.right + mContainerBoundsInset,
mInsets.bottom + mContainerBoundsInset);
// Special case -- we have the search bar, but no specific bounds, so just give it
// the inset bounds without a height.
searchBarBounds.set(mInsets.left + mContainerBoundsInset,
mInsets.top + mContainerBoundsInset,
getMeasuredWidth() - (mInsets.right + mContainerBoundsInset), 0);
} else {
// Use the search bounds, if there is a search bar, the bounds will contain
// the offsets for the insets so we can ignore that
padding = new Rect(mSearchBarBounds.left,
(mHasSearchBar ? 0 : (mInsets.top + mContainerBoundsInset)),
getMeasuredWidth() - mSearchBarBounds.right,
mInsets.bottom + mContainerBoundsInset);
}
if (!padding.equals(mContentPadding) || !searchBarBounds.equals(mSearchBarBounds)) {
mContentPadding.set(padding);
mContentBounds.set(padding.left, padding.top,
getMeasuredWidth() - padding.right,
getMeasuredHeight() - padding.bottom);
mSearchBarBounds.set(searchBarBounds);
onUpdateBackgroundAndPaddings(mSearchBarBounds, padding);
}
}
/**
* To be implemented by container views to update themselves when the bounds changes.
*/
protected abstract void onUpdateBackgroundAndPaddings(Rect searchBarBounds, Rect padding);
}
|
