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
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
|
/*
* Copyright (C) 2013 Square, Inc.
*
* 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.squareup.picasso;
import android.content.Context;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Point;
import android.graphics.Rect;
import android.graphics.drawable.AnimationDrawable;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.SystemClock;
import android.widget.ImageView;
import static android.graphics.Color.WHITE;
import static com.squareup.picasso.Picasso.LoadedFrom.MEMORY;
final class PicassoDrawable extends Drawable {
// Only accessed from main thread.
private static final Paint DEBUG_PAINT = new Paint();
private static final float FADE_DURATION = 200f; //ms
/**
* Create or update the drawable on the target {@link ImageView} to display the supplied bitmap
* image.
*/
static void setBitmap(ImageView target, Context context, Bitmap bitmap,
Picasso.LoadedFrom loadedFrom, boolean noFade, boolean debugging) {
Drawable placeholder = target.getDrawable();
if (placeholder instanceof AnimationDrawable) {
((AnimationDrawable) placeholder).stop();
}
PicassoDrawable drawable =
new PicassoDrawable(context, placeholder, bitmap, loadedFrom, noFade, debugging);
target.setImageDrawable(drawable);
}
/**
* Create or update the drawable on the target {@link ImageView} to display the supplied
* placeholder image.
*/
static void setPlaceholder(ImageView target, int placeholderResId, Drawable placeholderDrawable) {
if (placeholderResId != 0) {
target.setImageResource(placeholderResId);
} else {
target.setImageDrawable(placeholderDrawable);
}
if (target.getDrawable() instanceof AnimationDrawable) {
((AnimationDrawable) target.getDrawable()).start();
}
}
private final boolean debugging;
private final float density;
private final Picasso.LoadedFrom loadedFrom;
final BitmapDrawable image;
Drawable placeholder;
long startTimeMillis;
boolean animating;
int alpha = 0xFF;
PicassoDrawable(Context context, Drawable placeholder, Bitmap bitmap,
Picasso.LoadedFrom loadedFrom, boolean noFade, boolean debugging) {
Resources res = context.getResources();
this.debugging = debugging;
this.density = res.getDisplayMetrics().density;
this.loadedFrom = loadedFrom;
this.image = new BitmapDrawable(res, bitmap);
boolean fade = loadedFrom != MEMORY && !noFade;
if (fade) {
this.placeholder = placeholder;
animating = true;
startTimeMillis = SystemClock.uptimeMillis();
}
}
@Override public void draw(Canvas canvas) {
if (!animating) {
image.draw(canvas);
} else {
float normalized = (SystemClock.uptimeMillis() - startTimeMillis) / FADE_DURATION;
if (normalized >= 1f) {
animating = false;
placeholder = null;
image.draw(canvas);
} else {
if (placeholder != null) {
placeholder.draw(canvas);
}
int partialAlpha = (int) (alpha * normalized);
image.setAlpha(partialAlpha);
image.draw(canvas);
image.setAlpha(alpha);
invalidateSelf();
}
}
if (debugging) {
drawDebugIndicator(canvas);
}
}
@Override public int getIntrinsicWidth() {
return image.getIntrinsicWidth();
}
@Override public int getIntrinsicHeight() {
return image.getIntrinsicHeight();
}
@Override public void setAlpha(int alpha) {
this.alpha = alpha;
if (placeholder != null) {
placeholder.setAlpha(alpha);
}
image.setAlpha(alpha);
}
@Override public void setColorFilter(ColorFilter cf) {
if (placeholder != null) {
placeholder.setColorFilter(cf);
}
image.setColorFilter(cf);
}
@Override public int getOpacity() {
return image.getOpacity();
}
@Override protected void onBoundsChange(Rect bounds) {
super.onBoundsChange(bounds);
image.setBounds(bounds);
if (placeholder != null) {
placeholder.setBounds(bounds);
}
}
private void drawDebugIndicator(Canvas canvas) {
DEBUG_PAINT.setColor(WHITE);
Path path = getTrianglePath(new Point(0, 0), (int) (16 * density));
canvas.drawPath(path, DEBUG_PAINT);
DEBUG_PAINT.setColor(loadedFrom.debugColor);
path = getTrianglePath(new Point(0, 0), (int) (15 * density));
canvas.drawPath(path, DEBUG_PAINT);
}
private static Path getTrianglePath(Point p1, int width) {
Point p2 = new Point(p1.x + width, p1.y);
Point p3 = new Point(p1.x, p1.y + width);
Path path = new Path();
path.moveTo(p1.x, p1.y);
path.lineTo(p2.x, p2.y);
path.lineTo(p3.x, p3.y);
return path;
}
}
|
