src/ui/native_theme/native_theme_aura.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_AURA_H_
   6 #define UI_NATIVE_THEME_NATIVE_THEME_AURA_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "ui/native_theme/fallback_theme.h"
  11
  12 namespace gfx {
  13 class NineImagePainter;
  14 }
  15
  16 namespace ui {
  17
  18 // Aura implementation of native theme support.
  19 class NATIVE_THEME_EXPORT NativeThemeAura : public FallbackTheme {
  20  public:
  21   static NativeThemeAura* instance();
  22
  23  protected:
  24   NativeThemeAura();
  25   virtual ~NativeThemeAura();
  26
  27   // Overridden from NativeThemeBase:
  28   virtual void PaintMenuPopupBackground(
  29       SkCanvas* canvas,
  30       const gfx::Size& size,
  31       const MenuBackgroundExtraParams& menu_background) const OVERRIDE;
  32   virtual void PaintMenuItemBackground(
  33       SkCanvas* canvas,
  34       State state,
  35       const gfx::Rect& rect,
  36       const MenuListExtraParams& menu_list) const OVERRIDE;
  37   virtual void PaintArrowButton(SkCanvas* gc,
  38                                 const gfx::Rect& rect,
  39                                 Part direction,
  40                                 State state) const OVERRIDE;
  41   virtual void PaintScrollbarTrack(
  42       SkCanvas* sk_canvas,
  43       Part part,
  44       State state,
  45       const ScrollbarTrackExtraParams& extra_params,
  46       const gfx::Rect& rect) const OVERRIDE;
  47   virtual void PaintScrollbarThumb(SkCanvas* sk_canvas,
  48                                    Part part,
  49                                    State state,
  50                                    const gfx::Rect& rect) const OVERRIDE;
  51   virtual void PaintScrollbarCorner(SkCanvas* canvas,
  52                                     State state,
  53                                     const gfx::Rect& rect) const OVERRIDE;
  54
  55   virtual void PaintScrollbarThumbStateTransition(SkCanvas* canvas,
  56                                                   State startState,
  57                                                   State endState,
  58                                                   double progress,
  59                                                   const gfx::Rect& rect) const
  60       OVERRIDE;
  61
  62   // Returns the NineImagePainter used to paint the specified state, creating if
  63   // necessary. If no image is provided for the specified state the normal state
  64   // images are used.
  65   gfx::NineImagePainter* GetOrCreatePainter(
  66       const int image_ids[kNumStates][9],
  67       State state,
  68       scoped_ptr<gfx::NineImagePainter> painters[kNumStates]) const;
  69
  70   // Paints |painter| into the canvas using |rect|.
  71   void PaintPainter(gfx::NineImagePainter* painter,
  72                     SkCanvas* sk_canvas,
  73                     const gfx::Rect& rect) const;
  74
  75   mutable scoped_ptr<gfx::NineImagePainter> scrollbar_track_painter_;
  76
  77   mutable scoped_ptr<gfx::NineImagePainter>
  78       scrollbar_thumb_painters_[kNumStates];
  79
  80   mutable scoped_ptr<gfx::NineImagePainter>
  81       scrollbar_arrow_button_painters_[kNumStates];
  82
  83  private:
  84   struct DualPainter {
  85     // For overlay scrollbar thumbs, fill and stroke are controlled separately,
  86     // and each state is achieved by painting with different opacity. This
  87     // struct bundles information of painter generated using assets and alpha
  88     // value associated with each state, so that a DualPainter for overlay
  89     // scrollbar thumb would only need state as input to paint correctly.
  90     DualPainter(scoped_ptr<gfx::NineImagePainter> fill_painter,
  91                 const uint8 fill_alphas[kNumStates],
  92                 scoped_ptr<gfx::NineImagePainter> stroke_painter,
  93                 const uint8 stroke_alphas[kNumStates]);
  94     ~DualPainter();
  95
  96     scoped_ptr<gfx::NineImagePainter> fill_painter;
  97     const uint8* const fill_alphas;
  98     scoped_ptr<gfx::NineImagePainter> stroke_painter;
  99     const uint8* const stroke_alphas;
 100   };
 101
 102   // Returns DualPainter from specific fill and stroke, creating if necessary.
 103   scoped_ptr<DualPainter> CreateDualPainter(
 104       const int fill_image_ids[9],
 105       const uint8 fill_alphas[kNumStates],
 106       const int stroke_image_ids[9],
 107       const uint8 stroke_alphas[kNumStates]) const;
 108
 109   // Paints |dualPainter| into the canvas using |rect| and specific alpha.
 110   void PaintDualPainter(DualPainter* dual_painter,
 111                         SkCanvas* sk_canvas,
 112                         const gfx::Rect& rect,
 113                         State state) const;
 114
 115   void PaintDualPainterTransition(DualPainter* dual_painter,
 116                                   SkCanvas* sk_canvas,
 117                                   const gfx::Rect& rect,
 118                                   State startState,
 119                                   State endState,
 120                                   double progress) const;
 121
 122   mutable scoped_ptr<DualPainter> scrollbar_overlay_thumb_painter_;
 123
 124   DISALLOW_COPY_AND_ASSIGN(NativeThemeAura);
 125 };
 126
 127 }  // namespace ui
 128
 129 #endif  // UI_NATIVE_THEME_NATIVE_THEME_AURA_H_