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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "views/controls/menu/menu_image_util_gtk.h" | |
6 | |
7 #include "base/i18n/rtl.h" | |
8 #include "grit/ui_resources.h" | |
9 #include "third_party/skia/include/effects/SkGradientShader.h" | |
10 #include "ui/base/resource/resource_bundle.h" | |
11 #include "ui/gfx/canvas_skia.h" | |
12 | |
13 namespace { | |
14 | |
15 // Size of the radio button inciator. | |
16 const int kSelectedIndicatorSize = 5; | |
17 const int kIndicatorSize = 10; | |
18 | |
19 // Used for the radio indicator. See theme_draw for details. | |
20 const double kGradientStop = .5; | |
21 const SkColor kGradient0 = SkColorSetRGB(255, 255, 255); | |
22 const SkColor kGradient1 = SkColorSetRGB(255, 255, 255); | |
23 const SkColor kGradient2 = SkColorSetRGB(0xD8, 0xD8, 0xD8); | |
24 const SkColor kBaseStroke = SkColorSetRGB(0x8F, 0x8F, 0x8F); | |
25 const SkColor kRadioButtonIndicatorGradient0 = SkColorSetRGB(0, 0, 0); | |
26 const SkColor kRadioButtonIndicatorGradient1 = SkColorSetRGB(0x83, 0x83, 0x83); | |
27 const SkColor kIndicatorStroke = SkColorSetRGB(0, 0, 0); | |
28 | |
29 SkBitmap* CreateRadioButtonImage(bool selected) { | |
30 // + 2 (1px on each side) to cover rounding error. | |
31 gfx::CanvasSkia canvas(kIndicatorSize + 2, kIndicatorSize + 2, false); | |
32 canvas.TranslateInt(1, 1); | |
33 | |
34 SkPoint gradient_points[3]; | |
35 gradient_points[0].set(SkIntToScalar(0), SkIntToScalar(0)); | |
36 gradient_points[1].set( | |
37 SkIntToScalar(0), | |
38 SkIntToScalar(static_cast<int>(kIndicatorSize * kGradientStop))); | |
39 gradient_points[2].set(SkIntToScalar(0), SkIntToScalar(kIndicatorSize)); | |
40 SkColor gradient_colors[3] = { kGradient0, kGradient1, kGradient2 }; | |
41 SkShader* shader = SkGradientShader::CreateLinear( | |
42 gradient_points, gradient_colors, NULL, arraysize(gradient_points), | |
43 SkShader::kClamp_TileMode, NULL); | |
44 SkPaint paint; | |
45 paint.setStyle(SkPaint::kFill_Style); | |
46 paint.setAntiAlias(true); | |
47 paint.setShader(shader); | |
48 shader->unref(); | |
49 int radius = kIndicatorSize / 2; | |
50 canvas.drawCircle(radius, radius, radius, paint); | |
51 | |
52 paint.setStrokeWidth(SkIntToScalar(0)); | |
53 paint.setShader(NULL); | |
54 paint.setStyle(SkPaint::kStroke_Style); | |
55 paint.setColor(kBaseStroke); | |
56 canvas.drawCircle(radius, radius, radius, paint); | |
57 | |
58 if (selected) { | |
59 SkPoint selected_gradient_points[2]; | |
60 selected_gradient_points[0].set(SkIntToScalar(0), SkIntToScalar(0)); | |
61 selected_gradient_points[1].set( | |
62 SkIntToScalar(0), | |
63 SkIntToScalar(kSelectedIndicatorSize)); | |
64 SkColor selected_gradient_colors[2] = { kRadioButtonIndicatorGradient0, | |
65 kRadioButtonIndicatorGradient1 }; | |
66 shader = SkGradientShader::CreateLinear( | |
67 selected_gradient_points, selected_gradient_colors, NULL, | |
68 arraysize(selected_gradient_points), SkShader::kClamp_TileMode, NULL); | |
69 paint.setShader(shader); | |
70 shader->unref(); | |
71 paint.setStyle(SkPaint::kFill_Style); | |
72 canvas.drawCircle(radius, radius, | |
73 kSelectedIndicatorSize / 2, paint); | |
74 | |
75 paint.setStrokeWidth(SkIntToScalar(0)); | |
76 paint.setShader(NULL); | |
77 paint.setStyle(SkPaint::kStroke_Style); | |
78 paint.setColor(kIndicatorStroke); | |
79 canvas.drawCircle(radius, radius, | |
80 kSelectedIndicatorSize / 2, paint); | |
81 } | |
82 return new SkBitmap(canvas.ExtractBitmap()); | |
83 } | |
84 | |
85 SkBitmap* GetRtlSubmenuArrowImage() { | |
86 static SkBitmap* kRtlArrow = NULL; | |
87 if (!kRtlArrow) { | |
88 ResourceBundle& rb = ResourceBundle::GetSharedInstance(); | |
89 SkBitmap* r = rb.GetBitmapNamed(IDR_MENU_ARROW); | |
90 gfx::CanvasSkia canvas(r->width(), r->height(), false); | |
91 canvas.ScaleInt(-1, 1); | |
92 canvas.DrawBitmapInt(*r, - r->width(), 0); | |
93 kRtlArrow = new SkBitmap(canvas.ExtractBitmap()); | |
94 } | |
95 return kRtlArrow; | |
96 } | |
97 | |
98 } // namespace | |
99 | |
100 namespace views { | |
101 | |
102 const SkBitmap* GetRadioButtonImage(bool selected) { | |
103 static const SkBitmap* kRadioOn = CreateRadioButtonImage(true); | |
104 static const SkBitmap* kRadioOff = CreateRadioButtonImage(false); | |
105 | |
106 return selected ? kRadioOn : kRadioOff; | |
107 } | |
108 | |
109 const SkBitmap* GetSubmenuArrowImage() { | |
110 return base::i18n::IsRTL() ? | |
111 GetRtlSubmenuArrowImage() : | |
112 ResourceBundle::GetSharedInstance().GetBitmapNamed(IDR_MENU_ARROW); | |
113 } | |
114 | |
115 } // namespace views; | |
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