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      1 // Copyright (c) 2013 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 CHROME_BROWSER_UI_LIBGTK2UI_NATIVE_THEME_GTK2_H_
      6 #define CHROME_BROWSER_UI_LIBGTK2UI_NATIVE_THEME_GTK2_H_
      7 
      8 #include <gtk/gtk.h>
      9 
     10 #include "chrome/browser/ui/libgtk2ui/owned_widget_gtk2.h"
     11 #include "ui/native_theme/native_theme_base.h"
     12 
     13 typedef struct _GdkColor GdkColor;
     14 
     15 namespace libgtk2ui {
     16 
     17 // A version of NativeTheme that uses GTK2 supplied colours instead of the
     18 // default aura colours. Analogue to NativeThemeWin, except that can't be
     19 // compiled into the main chrome binary like the Windows code can.
     20 class NativeThemeGtk2 : public ui::NativeThemeBase {
     21  public:
     22   static NativeThemeGtk2* instance();
     23 
     24   // Overridden from ui::NativeThemeBase:
     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   virtual SkColor GetSystemColor(ColorId color_id) const OVERRIDE;
     34   virtual void PaintMenuPopupBackground(
     35       SkCanvas* canvas,
     36       const gfx::Size& size,
     37       const MenuBackgroundExtraParams& menu_background) const OVERRIDE;
     38   virtual void PaintMenuItemBackground(
     39       SkCanvas* canvas,
     40       State state,
     41       const gfx::Rect& rect,
     42       const MenuListExtraParams& menu_list) const OVERRIDE;
     43 
     44  private:
     45   NativeThemeGtk2();
     46   virtual ~NativeThemeGtk2();
     47 
     48   // Implementation of GetSystemColor.
     49   GdkColor GetSystemGdkColor(ColorId color_id) const;
     50 
     51   // Returns styles associated with various widget types.
     52   GtkWidget* GetRealizedWindow() const;
     53   GtkStyle* GetWindowStyle() const;
     54   GtkStyle* GetEntryStyle() const;
     55   GtkStyle* GetLabelStyle() const;
     56   GtkStyle* GetButtonStyle() const;
     57   GtkStyle* GetTreeStyle() const;
     58   GtkStyle* GetTooltipStyle() const;
     59   GtkStyle* GetMenuStyle() const;
     60   GtkStyle* GetMenuItemStyle() const;
     61 
     62   void PaintComboboxArrow(SkCanvas* canvas,
     63                           GtkStateType state,
     64                           const gfx::Rect& rect) const;
     65 
     66   mutable GtkWidget* fake_window_;
     67   mutable GtkWidget* fake_tooltip_;
     68   mutable OwnedWidgetGtk fake_entry_;
     69   mutable OwnedWidgetGtk fake_label_;
     70   mutable OwnedWidgetGtk fake_button_;
     71   mutable OwnedWidgetGtk fake_tree_;
     72 
     73   mutable OwnedWidgetGtk fake_menu_;
     74   mutable GtkWidget* fake_menu_item_;
     75 
     76   DISALLOW_COPY_AND_ASSIGN(NativeThemeGtk2);
     77 };
     78 
     79 }  // namespace libgtk2ui
     80 
     81 #endif  // CHROME_BROWSER_UI_LIBGTK2UI_NATIVE_THEME_GTK2_H_
     82