Home | History | Annotate | Download | only in menu 
      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 "grit/ui_resources.h"
     10 #include "third_party/skia/include/effects/SkGradientShader.h"
     11 #include "ui/base/resource/resource_bundle.h"
     12 #include "ui/gfx/canvas.h"
     13 #include "ui/gfx/image/canvas_image_source.h"
     14 #include "ui/gfx/image/image.h"
     15 #include "ui/gfx/image/image_skia.h"
     16 #include "ui/gfx/image/image_skia_source.h"
     17 #include "ui/gfx/point.h"
     18 #include "ui/gfx/size.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:
     38   explicit RadioButtonImageSource(bool selected)
     39       : CanvasImageSource(gfx::Size(kIndicatorSize + 2, kIndicatorSize + 2),
     40                           false),
     41         selected_(selected) {
     42   }
     43   virtual ~RadioButtonImageSource() {}
     44 
     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, NULL));
     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),
     80               SkShader::kClamp_TileMode, NULL));
     81       paint.setShader(shader.get());
     82       paint.setStyle(SkPaint::kFill_Style);
     83       canvas->sk_canvas()->drawCircle(radius, radius,
     84                                       kSelectedIndicatorSize / 2, paint);
     85 
     86       paint.setStrokeWidth(SkIntToScalar(0));
     87       paint.setShader(NULL);
     88       paint.setStyle(SkPaint::kStroke_Style);
     89       paint.setColor(kIndicatorStroke);
     90       canvas->sk_canvas()->drawCircle(radius, radius,
     91                                       kSelectedIndicatorSize / 2, paint);
     92     }
     93   }
     94 
     95  private:
     96   bool selected_;
     97 
     98   DISALLOW_COPY_AND_ASSIGN(RadioButtonImageSource);
     99 };
    100 
    101 gfx::ImageSkia* CreateRadioButtonImage(bool selected) {
    102   RadioButtonImageSource* source = new RadioButtonImageSource(selected);
    103   return new gfx::ImageSkia(source, source->size());
    104 }
    105 
    106 class SubmenuArrowImageSource : public gfx::CanvasImageSource {
    107  public:
    108   SubmenuArrowImageSource()
    109       : gfx::CanvasImageSource(GetSubmenuArrowSize(), false) {
    110   }
    111   virtual ~SubmenuArrowImageSource() {}
    112 
    113   virtual void Draw(gfx::Canvas* canvas) OVERRIDE {
    114     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
    115     const gfx::ImageSkia* r =
    116         rb.GetImageNamed(IDR_MENU_HIERARCHY_ARROW).ToImageSkia();
    117     canvas->Scale(-1, 1);
    118     canvas->DrawImageInt(*r, - r->width(), 0);
    119   }
    120 
    121  private:
    122   static gfx::Size GetSubmenuArrowSize() {
    123     return ui::ResourceBundle::GetSharedInstance()
    124         .GetImageNamed(IDR_MENU_HIERARCHY_ARROW).ToImageSkia()->size();
    125   }
    126 
    127   DISALLOW_COPY_AND_ASSIGN(SubmenuArrowImageSource);
    128 };
    129 
    130 gfx::ImageSkia* GetRtlSubmenuArrowImage() {
    131   static gfx::ImageSkia* kRtlArrow = NULL;
    132   if (!kRtlArrow) {
    133     SubmenuArrowImageSource* source = new SubmenuArrowImageSource();
    134     kRtlArrow = new gfx::ImageSkia(source, source->size());
    135   }
    136   return kRtlArrow;
    137 }
    138 
    139 }  // namespace
    140 
    141 namespace views {
    142 
    143 const gfx::ImageSkia* GetMenuCheckImage() {
    144   return ui::ResourceBundle::GetSharedInstance().GetImageNamed(
    145       IDR_MENU_CHECK_CHECKED).ToImageSkia();
    146 }
    147 
    148 const gfx::ImageSkia* GetRadioButtonImage(bool selected) {
    149   int image_id = selected ? IDR_MENU_RADIO_SELECTED : IDR_MENU_RADIO_EMPTY;
    150   return ui::ResourceBundle::GetSharedInstance().GetImageNamed(
    151       image_id).ToImageSkia();
    152 }
    153 
    154 const gfx::ImageSkia* GetSubmenuArrowImage() {
    155   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
    156   return base::i18n::IsRTL()
    157       ? GetRtlSubmenuArrowImage()
    158       : rb.GetImageNamed(IDR_MENU_HIERARCHY_ARROW).ToImageSkia();
    159 }
    160 
    161 }  // namespace views
    162