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      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   virtual ~AppListButton();
     24 
     25   bool draw_background_as_active() {
     26     return draw_background_as_active_;
     27   }
     28 
     29  protected:
     30   // views::ImageButton overrides:
     31   virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
     32   virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
     33   virtual void OnMouseCaptureLost() OVERRIDE;
     34   virtual bool OnMouseDragged(const ui::MouseEvent& event) OVERRIDE;
     35   virtual void OnMouseMoved(const ui::MouseEvent& event) OVERRIDE;
     36   virtual void OnMouseEntered(const ui::MouseEvent& event) OVERRIDE;
     37   virtual void OnMouseExited(const ui::MouseEvent& event) OVERRIDE;
     38   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
     39   virtual void GetAccessibleState(ui::AXViewState* state) OVERRIDE;
     40 
     41   // ui::EventHandler overrides:
     42   virtual 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   // True if touch view feedback command line flag has been enabled. When
     53   // enabled touch gestures will toggle rendering the background as active.
     54   bool touch_feedback_enabled_;
     55 
     56   ShelfButtonHost* host_;
     57   // Reference to the shelf widget containing this button, owned by the
     58   // root window controller.
     59   ShelfWidget* shelf_widget_;
     60 
     61   DISALLOW_COPY_AND_ASSIGN(AppListButton);
     62 };
     63 
     64 }  // namespace ash
     65 
     66 #endif  // ASH_SHELF_APP_LIST_BUTTON_H_
     67