ui/native_theme/native_theme_base.h

   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 #ifndef UI_NATIVE_THEME_NATIVE_THEME_BASE_H_
   6 #define UI_NATIVE_THEME_NATIVE_THEME_BASE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "skia/ext/platform_canvas.h"
  11 #include "ui/native_theme/native_theme.h"
  12
  13 namespace gfx {
  14 class ImageSkia;
  15 class Rect;
  16 class Size;
  17 }
  18
  19 namespace ui {
  20
  21 // Theme support for non-Windows toolkits.
  22 class NATIVE_THEME_EXPORT NativeThemeBase : public NativeTheme {
  23  public:
  24   // NativeTheme implementation:
  25   virtual gfx::Size GetPartSize(Part part,
  26                                 State state,
  27                                 const ExtraParams& extra) const OVERRIDE;
  28   virtual void Paint(SkCanvas* canvas,
  29                      Part part,
  30                      State state,
  31                      const gfx::Rect& rect,
  32                      const ExtraParams& extra) const OVERRIDE;
  33
  34  protected:
  35   NativeThemeBase();
  36   virtual ~NativeThemeBase();
  37
  38   // Draw the arrow. Used by scrollbar and inner spin button.
  39   virtual void PaintArrowButton(
  40       SkCanvas* gc,
  41       const gfx::Rect& rect,
  42       Part direction,
  43       State state) const;
  44   // Paint the scrollbar track. Done before the thumb so that it can contain
  45   // alpha.
  46   virtual void PaintScrollbarTrack(
  47       SkCanvas* canvas,
  48       Part part,
  49       State state,
  50       const ScrollbarTrackExtraParams& extra_params,
  51       const gfx::Rect& rect) const;
  52   // Draw the scrollbar thumb over the track.
  53   virtual void PaintScrollbarThumb(
  54       SkCanvas* canvas,
  55       Part part,
  56       State state,
  57       const gfx::Rect& rect) const;
  58
  59   virtual void PaintCheckbox(
  60       SkCanvas* canvas,
  61       State state,
  62       const gfx::Rect& rect,
  63       const ButtonExtraParams& button) const;
  64
  65   virtual void PaintRadio(
  66       SkCanvas* canvas,
  67       State state,
  68       const gfx::Rect& rect,
  69       const ButtonExtraParams& button) const;
  70
  71   virtual void PaintButton(
  72       SkCanvas* canvas,
  73       State state,
  74       const gfx::Rect& rect,
  75       const ButtonExtraParams& button) const;
  76
  77   virtual void PaintTextField(
  78       SkCanvas* canvas,
  79       State state,
  80       const gfx::Rect& rect,
  81       const TextFieldExtraParams& text) const;
  82
  83   virtual void PaintMenuList(
  84       SkCanvas* canvas,
  85       State state,
  86       const gfx::Rect& rect,
  87       const MenuListExtraParams& menu_list) const;
  88
  89   virtual void PaintMenuPopupBackground(
  90       SkCanvas* canvas,
  91       const gfx::Size& size,
  92       const MenuBackgroundExtraParams& menu_background) const;
  93
  94   virtual void PaintMenuItemBackground(
  95       SkCanvas* canvas,
  96       State state,
  97       const gfx::Rect& rect,
  98       const MenuListExtraParams& menu_list) const;
  99
 100   virtual void PaintSliderTrack(
 101       SkCanvas* canvas,
 102       State state,
 103       const gfx::Rect& rect,
 104       const SliderExtraParams& slider) const;
 105
 106   virtual void PaintSliderThumb(
 107       SkCanvas* canvas,
 108       State state,
 109       const gfx::Rect& rect,
 110       const SliderExtraParams& slider) const;
 111
 112   virtual void PaintInnerSpinButton(
 113       SkCanvas* canvas,
 114       State state,
 115       const gfx::Rect& rect,
 116       const InnerSpinButtonExtraParams& spin_button) const;
 117
 118   virtual void PaintProgressBar(
 119       SkCanvas* canvas,
 120       State state,
 121       const gfx::Rect& rect,
 122       const ProgressBarExtraParams& progress_bar) const;
 123
 124  protected:
 125   void set_scrollbar_button_length(unsigned int length) {
 126     scrollbar_button_length_ = length;
 127   }
 128
 129   bool IntersectsClipRectInt(SkCanvas* canvas,
 130                              int x, int y, int w, int h) const;
 131
 132   void DrawImageInt(SkCanvas* canvas, const gfx::ImageSkia& image,
 133                     int src_x, int src_y, int src_w, int src_h,
 134                     int dest_x, int dest_y, int dest_w, int dest_h) const;
 135
 136   void DrawTiledImage(SkCanvas* canvas,
 137                       const gfx::ImageSkia& image,
 138                       int src_x, int src_y,
 139                       float tile_scale_x, float tile_scale_y,
 140                       int dest_x, int dest_y, int w, int h) const;
 141
 142   SkColor SaturateAndBrighten(SkScalar* hsv,
 143                               SkScalar saturate_amount,
 144                               SkScalar brighten_amount) const;
 145  private:
 146   void DrawVertLine(SkCanvas* canvas,
 147                     int x,
 148                     int y1,
 149                     int y2,
 150                     const SkPaint& paint) const;
 151   void DrawHorizLine(SkCanvas* canvas,
 152                      int x1,
 153                      int x2,
 154                      int y,
 155                      const SkPaint& paint) const;
 156   void DrawBox(SkCanvas* canvas,
 157                const gfx::Rect& rect,
 158                const SkPaint& paint) const;
 159   SkScalar Clamp(SkScalar value,
 160                  SkScalar min,
 161                  SkScalar max) const;
 162   SkColor OutlineColor(SkScalar* hsv1, SkScalar* hsv2) const;
 163
 164   // Paint the common parts of the checkboxes and radio buttons.
 165   // borderRadius specifies how rounded the corners should be.
 166   SkRect PaintCheckboxRadioCommon(
 167       SkCanvas* canvas,
 168       State state,
 169       const gfx::Rect& rect,
 170       const SkScalar borderRadius) const;
 171
 172   unsigned int scrollbar_width_;
 173   unsigned int scrollbar_button_length_;
 174
 175   DISALLOW_COPY_AND_ASSIGN(NativeThemeBase);
 176 };
 177
 178 }  // namespace ui
 179
 180 #endif  // UI_NATIVE_THEME_NATIVE_THEME_BASE_H_