ash/shelf/app_list_button.h

   1 // Copyright 2014 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 ASH_SHELF_APP_LIST_BUTTON_H_
   6 #define ASH_SHELF_APP_LIST_BUTTON_H_
   7
   8 #include "ui/views/controls/button/image_button.h"
   9
  10 namespace ash {
  11 class ShelfButtonHost;
  12 class ShelfWidget;
  13
  14 // Button used for the AppList icon on the shelf.
  15 class AppListButton : public views::ImageButton {
  16  public:
  17   // Bounds size (inset) required for the app icon image (in pixels).
  18   static const int kImageBoundsSize;
  19
  20   AppListButton(views::ButtonListener* listener,
  21                 ShelfButtonHost* host,
  22                 ShelfWidget* shelf_widget);
  23   ~AppListButton() override;
  24
  25   bool draw_background_as_active() {
  26     return draw_background_as_active_;
  27   }
  28
  29  protected:
  30   // views::ImageButton overrides:
  31   bool OnMousePressed(const ui::MouseEvent& event) override;
  32   void OnMouseReleased(const ui::MouseEvent& event) override;
  33   void OnMouseCaptureLost() override;
  34   bool OnMouseDragged(const ui::MouseEvent& event) override;
  35   void OnMouseMoved(const ui::MouseEvent& event) override;
  36   void OnMouseEntered(const ui::MouseEvent& event) override;
  37   void OnMouseExited(const ui::MouseEvent& event) override;
  38   void OnPaint(gfx::Canvas* canvas) override;
  39   void GetAccessibleState(ui::AXViewState* state) override;
  40
  41   // ui::EventHandler overrides:
  42   void OnGestureEvent(ui::GestureEvent* event) override;
  43
  44  private:
  45   // Toggles the active state for painting the background and schedules a paint.
  46   void SetDrawBackgroundAsActive(bool draw_background_as_active);
  47
  48   // True if the background should render as active, regardless of the state of
  49   // the application list.
  50   bool draw_background_as_active_;
  51
  52   ShelfButtonHost* host_;
  53   // Reference to the shelf widget containing this button, owned by the
  54   // root window controller.
  55   ShelfWidget* shelf_widget_;
  56
  57   DISALLOW_COPY_AND_ASSIGN(AppListButton);
  58 };
  59
  60 }  // namespace ash
  61
  62 #endif  // ASH_SHELF_APP_LIST_BUTTON_H_