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
|
/*
* Copyright (C) 2013 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.camera.tinyplanet;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
import java.util.concurrent.locks.Lock;
/**
* Shows a preview of the TinyPlanet on the screen while editing.
*/
public class TinyPlanetPreview extends View {
/**
* Classes implementing this interface get informed about changes to the
* preview size.
*/
public static interface PreviewSizeListener {
/**
* Called when the preview size has changed.
*
* @param sizePx the size in pixels of the square preview area
*/
public void onSizeChanged(int sizePx);
}
private Paint mPaint = new Paint();
private Bitmap mPreview;
private Lock mLock;
private PreviewSizeListener mPreviewSizeListener;
private int mSize = 0;
public TinyPlanetPreview(Context context) {
super(context);
}
public TinyPlanetPreview(Context context, AttributeSet attrs) {
super(context, attrs);
}
public TinyPlanetPreview(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
/**
* Sets the bitmap and waits for a draw to happen before returning.
*/
public void setBitmap(Bitmap preview, Lock lock) {
mPreview = preview;
mLock = lock;
invalidate();
}
public void setPreviewSizeChangeListener(PreviewSizeListener listener) {
mPreviewSizeListener = listener;
if (mSize > 0) {
mPreviewSizeListener.onSizeChanged(mSize);
}
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (mLock != null && mLock.tryLock() && mPreview != null && !mPreview.isRecycled()) {
try {
canvas.drawBitmap(mPreview, 0, 0, mPaint);
} finally {
mLock.unlock();
}
}
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
// Make sure the view is square
int size = Math.min(getMeasuredWidth(), getMeasuredHeight());
setMeasuredDimension(size, size);
}
@Override
protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
super.onLayout(changed, left, top, right, bottom);
if (changed && mPreviewSizeListener != null) {
int width = right - left;
int height = bottom - top;
// These should be the same as we enforce a square layout, but let's
// be safe.
int mSize = Math.min(width, height);
// Tell the listener about our new size so the renderer can adapt.
if (mSize > 0 && mPreviewSizeListener != null) {
mPreviewSizeListener.onSizeChanged(mSize);
}
}
}
}
|
