chrome/browser/ui/views/tab_icon_view.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 CHROME_BROWSER_UI_VIEWS_TAB_ICON_VIEW_H_
   6 #define CHROME_BROWSER_UI_VIEWS_TAB_ICON_VIEW_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/compiler_specific.h"
  10 #include "ui/views/controls/button/menu_button.h"
  11 #include "ui/views/view.h"
  12
  13 namespace chrome {
  14 class TabIconViewModel;
  15 }
  16
  17 namespace gfx {
  18 class ImageSkia;
  19 }
  20
  21 // A view to display a tab favicon or a throbber.
  22 class TabIconView : public views::MenuButton {
  23  public:
  24   static void InitializeIfNeeded();
  25
  26   TabIconView(chrome::TabIconViewModel* model,
  27               views::MenuButtonListener* menu_button_listener);
  28   virtual ~TabIconView();
  29
  30   // Invoke whenever the tab state changes or the throbber should update.
  31   void Update();
  32
  33   // Set the throbber to the light style (for use on dark backgrounds).
  34   void set_is_light(bool is_light) { is_light_ = is_light; }
  35
  36   // Overridden from View
  37   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
  38   virtual gfx::Size GetPreferredSize() const OVERRIDE;
  39
  40  private:
  41   void PaintThrobber(gfx::Canvas* canvas);
  42   void PaintFavicon(gfx::Canvas* canvas, const gfx::ImageSkia& image);
  43   void PaintIcon(gfx::Canvas* canvas,
  44                  const gfx::ImageSkia& image,
  45                  int src_x,
  46                  int src_y,
  47                  int src_w,
  48                  int src_h,
  49                  bool filter);
  50
  51   // Our model.
  52   chrome::TabIconViewModel* model_;
  53
  54   // Whether the throbber is running.
  55   bool throbber_running_;
  56
  57   // Whether we should display our light or dark style.
  58   bool is_light_;
  59
  60   // Current frame of the throbber being painted. This is only used if
  61   // throbber_running_ is true.
  62   int throbber_frame_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(TabIconView);
  65 };
  66
  67 #endif  // CHROME_BROWSER_UI_VIEWS_TAB_ICON_VIEW_H_