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
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/*
* Copyright © 2018 The Android Open Source Project
* Copyright © 2018-2019 WireGuard LLC. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
package com.wireguard.android.widget;
import android.animation.ObjectAnimator;
import android.animation.ValueAnimator;
import android.content.res.ColorStateList;
import android.graphics.Canvas;
import android.graphics.ColorFilter;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.graphics.Path;
import android.graphics.Path.Direction;
import android.graphics.PixelFormat;
import android.graphics.PorterDuff.Mode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.graphics.Region;
import android.graphics.drawable.Drawable;
import android.os.Build;
import android.util.FloatProperty;
import com.wireguard.util.NonNullForAll;
import androidx.annotation.ColorInt;
import androidx.annotation.IntRange;
import androidx.annotation.Nullable;
import androidx.annotation.RequiresApi;
@RequiresApi(Build.VERSION_CODES.N)
@NonNullForAll
public class SlashDrawable extends Drawable {
private static final float CENTER_X = 10.65f;
private static final float CENTER_Y = 11.869239f;
private static final float CORNER_RADIUS = Build.VERSION.SDK_INT < Build.VERSION_CODES.O ? 0f : 1f;
// Draw the slash washington-monument style; rotate to no-u-turn style
private static final float DEFAULT_ROTATION = -45f;
private static final long QS_ANIM_LENGTH = 350;
private static final float SCALE = 24f;
private static final float SLASH_HEIGHT = 28f;
// These values are derived in un-rotated (vertical) orientation
private static final float SLASH_WIDTH = 1.8384776f;
// Bottom is derived during animation
private static final float LEFT = (CENTER_X - (SLASH_WIDTH / 2)) / SCALE;
private static final float RIGHT = (CENTER_X + (SLASH_WIDTH / 2)) / SCALE;
private static final float TOP = (CENTER_Y - (SLASH_HEIGHT / 2)) / SCALE;
private static final FloatProperty mSlashLengthProp = new FloatProperty<SlashDrawable>("slashLength") {
@Override
public Float get(final SlashDrawable object) {
return object.mCurrentSlashLength;
}
@Override
public void setValue(final SlashDrawable object, final float value) {
object.mCurrentSlashLength = value;
}
};
private final Drawable mDrawable;
private final Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
private final Path mPath = new Path();
private final RectF mSlashRect = new RectF(0, 0, 0, 0);
private boolean mAnimationEnabled = true;
// Animate this value on change
private float mCurrentSlashLength;
private float mRotation;
private boolean mSlashed;
public SlashDrawable(final Drawable d) {
mDrawable = d;
}
@SuppressWarnings("deprecation")
@Override
public void draw(final Canvas canvas) {
canvas.save();
final Matrix m = new Matrix();
final int width = getBounds().width();
final int height = getBounds().height();
final float radiusX = scale(CORNER_RADIUS, width);
final float radiusY = scale(CORNER_RADIUS, height);
updateRect(
scale(LEFT, width),
scale(TOP, height),
scale(RIGHT, width),
scale(TOP + mCurrentSlashLength, height)
);
mPath.reset();
// Draw the slash vertically
mPath.addRoundRect(mSlashRect, radiusX, radiusY, Direction.CW);
// Rotate -45 + desired rotation
m.setRotate(mRotation + DEFAULT_ROTATION, width / 2, height / 2);
mPath.transform(m);
canvas.drawPath(mPath, mPaint);
// Rotate back to vertical
m.setRotate(-mRotation - DEFAULT_ROTATION, width / 2, height / 2);
mPath.transform(m);
// Draw another rect right next to the first, for clipping
m.setTranslate(mSlashRect.width(), 0);
mPath.transform(m);
mPath.addRoundRect(mSlashRect, 1.0f * width, 1.0f * height, Direction.CW);
m.setRotate(mRotation + DEFAULT_ROTATION, width / 2, height / 2);
mPath.transform(m);
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O)
canvas.clipPath(mPath, Region.Op.DIFFERENCE);
else
canvas.clipOutPath(mPath);
mDrawable.draw(canvas);
canvas.restore();
}
@Override
public int getIntrinsicHeight() {
return mDrawable.getIntrinsicHeight();
}
@Override
public int getIntrinsicWidth() {
return mDrawable.getIntrinsicWidth();
}
@SuppressWarnings("deprecation")
@Override
public int getOpacity() {
return PixelFormat.OPAQUE;
}
@Override
protected void onBoundsChange(final Rect bounds) {
super.onBoundsChange(bounds);
mDrawable.setBounds(bounds);
}
private float scale(final float frac, final int width) {
return frac * width;
}
@Override
public void setAlpha(@IntRange(from = 0, to = 255) final int alpha) {
mDrawable.setAlpha(alpha);
mPaint.setAlpha(alpha);
}
public void setAnimationEnabled(final boolean enabled) {
mAnimationEnabled = enabled;
}
@Override
public void setColorFilter(@Nullable final ColorFilter colorFilter) {
mDrawable.setColorFilter(colorFilter);
mPaint.setColorFilter(colorFilter);
}
private void setDrawableTintList(@Nullable final ColorStateList tint) {
mDrawable.setTintList(tint);
}
public void setRotation(final float rotation) {
if (mRotation == rotation)
return;
mRotation = rotation;
invalidateSelf();
}
@SuppressWarnings("unchecked")
public void setSlashed(final boolean slashed) {
if (mSlashed == slashed) return;
mSlashed = slashed;
final float end = mSlashed ? SLASH_HEIGHT / SCALE : 0f;
final float start = mSlashed ? 0f : SLASH_HEIGHT / SCALE;
if (mAnimationEnabled) {
final ObjectAnimator anim = ObjectAnimator.ofFloat(this, mSlashLengthProp, start, end);
anim.addUpdateListener((ValueAnimator valueAnimator) -> invalidateSelf());
anim.setDuration(QS_ANIM_LENGTH);
anim.start();
} else {
mCurrentSlashLength = end;
invalidateSelf();
}
}
@Override
public void setTint(@ColorInt final int tintColor) {
super.setTint(tintColor);
mDrawable.setTint(tintColor);
mPaint.setColor(tintColor);
}
@Override
public void setTintList(@Nullable final ColorStateList tint) {
super.setTintList(tint);
setDrawableTintList(tint);
mPaint.setColor(tint == null ? 0 : tint.getDefaultColor());
invalidateSelf();
}
@Override
public void setTintMode(final Mode tintMode) {
super.setTintMode(tintMode);
mDrawable.setTintMode(tintMode);
}
private void updateRect(final float left, final float top, final float right, final float bottom) {
mSlashRect.left = left;
mSlashRect.top = top;
mSlashRect.right = right;
mSlashRect.bottom = bottom;
}
}
|
