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 "base/time/time.h"
  11 #include "ui/views/controls/button/menu_button.h"
  12 #include "ui/views/view.h"
  13
  14 namespace chrome {
  15 class TabIconViewModel;
  16 }
  17
  18 namespace gfx {
  19 class ImageSkia;
  20 }
  21
  22 // A view to display a tab favicon or a throbber.
  23 class TabIconView : public views::MenuButton {
  24  public:
  25   static void InitializeIfNeeded();
  26
  27   TabIconView(chrome::TabIconViewModel* model,
  28               views::MenuButtonListener* menu_button_listener);
  29   ~TabIconView() override;
  30
  31   // Invoke whenever the tab state changes or the throbber should update.
  32   void Update();
  33
  34   // Set the throbber to the light style (for use on dark backgrounds).
  35   void set_is_light(bool is_light) { is_light_ = is_light; }
  36
  37  private:
  38   // views::MenuButton:
  39   gfx::Size GetPreferredSize() const override;
  40   const char* GetClassName() const override;
  41   void OnPaint(gfx::Canvas* canvas) override;
  42
  43   void PaintThrobber(gfx::Canvas* canvas);
  44   void PaintFavicon(gfx::Canvas* canvas, const gfx::ImageSkia& image);
  45
  46   // Our model.
  47   chrome::TabIconViewModel* model_;
  48
  49   // Whether we should display our light or dark style.
  50   bool is_light_;
  51
  52   // Time we painted the first frame of the current throbber animation, or
  53   // 0 if not painting the throbber.
  54   base::TimeTicks throbber_start_time_;
  55
  56   DISALLOW_COPY_AND_ASSIGN(TabIconView);
  57 };
  58
  59 #endif  // CHROME_BROWSER_UI_VIEWS_TAB_ICON_VIEW_H_