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
|
/*
* Copyright (C) 2018 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.quickstep.views;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.view.View;
import com.android.launcher3.FastBitmapDrawable;
import java.util.ArrayList;
import androidx.annotation.NonNull;
/**
* A view which draws a drawable stretched to fit its size. Unlike ImageView, it avoids relayout
* when the drawable changes.
*/
public class IconView extends View {
public interface OnScaleUpdateListener {
public void onScaleUpdate(float scale);
}
private Drawable mDrawable;
private ArrayList<OnScaleUpdateListener> mScaleListeners;
public IconView(Context context) {
super(context);
}
public IconView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public IconView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public void setDrawable(Drawable d) {
if (mDrawable != null) {
mDrawable.setCallback(null);
}
mDrawable = d;
if (mDrawable != null) {
mDrawable.setCallback(this);
mDrawable.setBounds(0, 0, getWidth(), getHeight());
}
invalidate();
}
public Drawable getDrawable() {
return mDrawable;
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
if (mDrawable != null) {
mDrawable.setBounds(0, 0, w, h);
}
}
@Override
protected boolean verifyDrawable(Drawable who) {
return super.verifyDrawable(who) || who == mDrawable;
}
@Override
protected void drawableStateChanged() {
super.drawableStateChanged();
final Drawable drawable = mDrawable;
if (drawable != null && drawable.isStateful()
&& drawable.setState(getDrawableState())) {
invalidateDrawable(drawable);
}
}
@Override
public void invalidateDrawable(@NonNull Drawable drawable) {
super.invalidateDrawable(drawable);
if (drawable instanceof FastBitmapDrawable && mScaleListeners != null) {
for (OnScaleUpdateListener listener : mScaleListeners) {
listener.onScaleUpdate(((FastBitmapDrawable) drawable).getScale());
}
}
}
@Override
protected void onDraw(Canvas canvas) {
if (mDrawable != null) {
mDrawable.draw(canvas);
}
}
@Override
public boolean hasOverlappingRendering() {
return false;
}
public void addUpdateScaleListener(OnScaleUpdateListener listener) {
if (mScaleListeners == null) {
mScaleListeners = new ArrayList<>();
}
mScaleListeners.add(listener);
if (mDrawable instanceof FastBitmapDrawable) {
listener.onScaleUpdate(((FastBitmapDrawable) mDrawable).getScale());
}
}
public void removeUpdateScaleListener(OnScaleUpdateListener listener) {
if (mScaleListeners != null) {
mScaleListeners.remove(listener);
}
}
}
|
