1 // Copyright (c) 2012 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 "ui/views/controls/menu/menu_image_util.h"
6
7 #include "base/i18n/rtl.h"
8 #include "base/logging.h"
9 #include "third_party/skia/include/effects/SkGradientShader.h"
10 #include "ui/base/resource/resource_bundle.h"
11 #include "ui/gfx/canvas.h"
12 #include "ui/gfx/image/canvas_image_source.h"
13 #include "ui/gfx/image/image.h"
14 #include "ui/gfx/image/image_skia.h"
15 #include "ui/gfx/image/image_skia_source.h"
16 #include "ui/gfx/point.h"
17 #include "ui/gfx/size.h"
18 #include "ui/resources/grit/ui_resources.h"
19
20 namespace {
21
22 // Size of the radio button inciator.
23 const int kSelectedIndicatorSize = 5;
24 const int kIndicatorSize = 10;
25
26 // Used for the radio indicator. See theme_draw for details.
27 const double kGradientStop = .5;
28 const SkColor kGradient0 = SkColorSetRGB(255, 255, 255);
29 const SkColor kGradient1 = SkColorSetRGB(255, 255, 255);
30 const SkColor kGradient2 = SkColorSetRGB(0xD8, 0xD8, 0xD8);
31 const SkColor kBaseStroke = SkColorSetRGB(0x8F, 0x8F, 0x8F);
32 const SkColor kRadioButtonIndicatorGradient0 = SkColorSetRGB(0, 0, 0);
33 const SkColor kRadioButtonIndicatorGradient1 = SkColorSetRGB(0x83, 0x83, 0x83);
34 const SkColor kIndicatorStroke = SkColorSetRGB(0, 0, 0);
35
36 class RadioButtonImageSource : public gfx::CanvasImageSource {
37 public:
RadioButtonImageSource(bool selected)38 explicit RadioButtonImageSource(bool selected)
39 : CanvasImageSource(gfx::Size(kIndicatorSize + 2, kIndicatorSize + 2),
40 false),
41 selected_(selected) {
42 }
~RadioButtonImageSource()43 virtual ~RadioButtonImageSource() {}
44
Draw(gfx::Canvas * canvas)45 virtual void Draw(gfx::Canvas* canvas) OVERRIDE {
46 canvas->Translate(gfx::Vector2d(1, 1));
47
48 SkPoint gradient_points[3];
49 gradient_points[0].iset(0, 0);
50 gradient_points[1].iset(0,
51 static_cast<int>(kIndicatorSize * kGradientStop));
52 gradient_points[2].iset(0, kIndicatorSize);
53 SkColor gradient_colors[3] = { kGradient0, kGradient1, kGradient2 };
54 skia::RefPtr<SkShader> shader = skia::AdoptRef(
55 SkGradientShader::CreateLinear(
56 gradient_points, gradient_colors, NULL, arraysize(gradient_points),
57 SkShader::kClamp_TileMode));
58 SkPaint paint;
59 paint.setStyle(SkPaint::kFill_Style);
60 paint.setAntiAlias(true);
61 paint.setShader(shader.get());
62 int radius = kIndicatorSize / 2;
63 canvas->sk_canvas()->drawCircle(radius, radius, radius, paint);
64 paint.setStrokeWidth(SkIntToScalar(0));
65 paint.setShader(NULL);
66 paint.setStyle(SkPaint::kStroke_Style);
67 paint.setColor(kBaseStroke);
68 canvas->sk_canvas()->drawCircle(radius, radius, radius, paint);
69
70 if (selected_) {
71 SkPoint selected_gradient_points[2];
72 selected_gradient_points[0].iset(0, 0);
73 selected_gradient_points[1].iset(0, kSelectedIndicatorSize);
74 SkColor selected_gradient_colors[2] = { kRadioButtonIndicatorGradient0,
75 kRadioButtonIndicatorGradient1 };
76 shader = skia::AdoptRef(
77 SkGradientShader::CreateLinear(
78 selected_gradient_points, selected_gradient_colors, NULL,
79 arraysize(selected_gradient_points), SkShader::kClamp_TileMode));
80 paint.setShader(shader.get());
81 paint.setStyle(SkPaint::kFill_Style);
82 canvas->sk_canvas()->drawCircle(radius, radius,
83 kSelectedIndicatorSize / 2, paint);
84
85 paint.setStrokeWidth(SkIntToScalar(0));
86 paint.setShader(NULL);
87 paint.setStyle(SkPaint::kStroke_Style);
88 paint.setColor(kIndicatorStroke);
89 canvas->sk_canvas()->drawCircle(radius, radius,
90 kSelectedIndicatorSize / 2, paint);
91 }
92 }
93
94 private:
95 bool selected_;
96
97 DISALLOW_COPY_AND_ASSIGN(RadioButtonImageSource);
98 };
99
100 class SubmenuArrowImageSource : public gfx::CanvasImageSource {
101 public:
SubmenuArrowImageSource(int image_id)102 SubmenuArrowImageSource(int image_id)
103 : gfx::CanvasImageSource(ui::ResourceBundle::GetSharedInstance().
104 GetImageNamed(image_id).ToImageSkia()->size(), false),
105 image_id_(image_id) {}
~SubmenuArrowImageSource()106 virtual ~SubmenuArrowImageSource() {}
107
Draw(gfx::Canvas * canvas)108 virtual void Draw(gfx::Canvas* canvas) OVERRIDE {
109 ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
110 const gfx::ImageSkia* r = rb.GetImageNamed(image_id_).ToImageSkia();
111 canvas->Scale(-1, 1);
112 canvas->DrawImageInt(*r, - r->width(), 0);
113 }
114
115 private:
GetSubmenuArrowSize()116 static gfx::Size GetSubmenuArrowSize() {
117 return ui::ResourceBundle::GetSharedInstance()
118 .GetImageNamed(IDR_MENU_HIERARCHY_ARROW).ToImageSkia()->size();
119 }
120
121 int image_id_;
122
123 DISALLOW_COPY_AND_ASSIGN(SubmenuArrowImageSource);
124 };
125
GetRtlSubmenuArrowImage(bool rtl,bool dark_background)126 gfx::ImageSkia GetRtlSubmenuArrowImage(bool rtl,
127 bool dark_background) {
128 int image_id = dark_background ? IDR_MENU_HIERARCHY_ARROW_DARK_BACKGROUND :
129 IDR_MENU_HIERARCHY_ARROW;
130
131 if (!rtl) {
132 return ui::ResourceBundle::GetSharedInstance().GetImageNamed(image_id).
133 AsImageSkia();
134 }
135
136 static gfx::ImageSkia* kRtlArrow = NULL;
137 static gfx::ImageSkia* kRtlArrowDarkBg = NULL;
138 gfx::ImageSkia** image = dark_background ? &kRtlArrowDarkBg : &kRtlArrow;
139
140 if (!*image) {
141 SubmenuArrowImageSource* source = new SubmenuArrowImageSource(image_id);
142 *image = new gfx::ImageSkia(source, source->size());
143 }
144
145 return **image;
146 }
147
148 } // namespace
149
150 namespace views {
151
GetMenuCheckImage(bool dark_background)152 gfx::ImageSkia GetMenuCheckImage(bool dark_background) {
153 int image_id = dark_background ? IDR_MENU_CHECK_CHECKED_DARK_BACKGROUND :
154 IDR_MENU_CHECK_CHECKED;
155 return ui::ResourceBundle::GetSharedInstance().GetImageNamed(image_id).
156 AsImageSkia();
157 }
158
GetRadioButtonImage(bool selected)159 gfx::ImageSkia GetRadioButtonImage(bool selected) {
160 int image_id = selected ? IDR_MENU_RADIO_SELECTED : IDR_MENU_RADIO_EMPTY;
161 return ui::ResourceBundle::GetSharedInstance().GetImageNamed(image_id).
162 AsImageSkia();
163 }
164
GetSubmenuArrowImage(bool dark_background)165 gfx::ImageSkia GetSubmenuArrowImage(bool dark_background) {
166 return GetRtlSubmenuArrowImage(base::i18n::IsRTL(), dark_background);
167 }
168
169 } // namespace views
170