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
|
/*
* Copyright (C) 2010 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.gallery3d.photoeditor.actions;
import android.content.Context;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Region.Op;
import android.graphics.drawable.BitmapDrawable;
import android.util.AttributeSet;
import android.widget.SeekBar;
import com.android.gallery3d.R;
/**
* Seek-bar that has a draggable thumb to set and get the color from predefined color set.
*/
class ColorSeekBar extends AbstractSeekBar {
/**
* Listens to color changes.
*/
public interface OnColorChangeListener {
void onColorChanged(int color, boolean fromUser);
}
private final int[] colors;
private Bitmap progressDrawable;
public ColorSeekBar(Context context, AttributeSet attrs) {
super(context, attrs);
// Set up the predefined colors that could be indexed in the seek-bar.
TypedArray a = getResources().obtainTypedArray(R.array.color_picker_colors);
colors = new int[a.length()];
for (int i = 0; i < a.length(); i++) {
colors[i] = a.getColor(i, 0x000000);
}
a.recycle();
setMax(colors.length - 1);
}
@Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
super.onSizeChanged(w, h, oldw, oldh);
if (progressDrawable != null) {
progressDrawable.recycle();
}
int width = w - getPaddingLeft() - getPaddingRight();
int height = h - getPaddingTop() - getPaddingBottom();
progressDrawable = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(progressDrawable);
Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
paint.setStyle(Paint.Style.FILL);
// Draw two half circles in the first and last colors at the left/right ends.
int radius = height / 2;
float left = radius;
float right = width - radius;
canvas.save();
canvas.clipRect(left, 0, right, height, Op.DIFFERENCE);
paint.setColor(colors[0]);
canvas.drawCircle(left, radius, radius, paint);
paint.setColor(colors[colors.length - 1]);
canvas.drawCircle(right, radius, radius, paint);
canvas.restore();
// Draw color strips that make the thumb stop at every strip's center during seeking.
float strip = (right - left) / (colors.length - 1);
right = left + strip / 2;
paint.setColor(colors[0]);
canvas.drawRect(left, 0, right, height, paint);
left = right;
for (int i = 1; i < colors.length - 1; i++) {
right = left + strip;
paint.setColor(colors[i]);
canvas.drawRect(left, 0, right, height, paint);
left = right;
}
right = left + strip / 2;
paint.setColor(colors[colors.length - 1]);
canvas.drawRect(left, 0, right, height, paint);
setProgressDrawable(new BitmapDrawable(getResources(), progressDrawable));
}
public void setOnColorChangeListener(final OnColorChangeListener listener) {
setOnSeekBarChangeListener((listener == null) ? null : new OnSeekBarChangeListener() {
@Override
public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
listener.onColorChanged(colors[progress], fromUser);
}
@Override
public void onStartTrackingTouch(SeekBar seekBar) {
}
@Override
public void onStopTrackingTouch(SeekBar seekBar) {
}
});
}
public void setColorIndex(int colorIndex) {
setProgress(colorIndex);
}
public int getColor() {
return colors[getProgress()];
}
}
|
