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      1 // Copyright 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 ASH_SHELF_OVERFLOW_BUBBLE_H_
      6 #define ASH_SHELF_OVERFLOW_BUBBLE_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "base/compiler_specific.h"
     10 #include "ui/events/event_handler.h"
     11 #include "ui/views/widget/widget_observer.h"
     12 
     13 namespace ui {
     14 class LocatedEvent;
     15 }
     16 
     17 namespace views {
     18 class View;
     19 }
     20 
     21 namespace ash {
     22 class OverflowBubbleView;
     23 class ShelfLayoutManager;
     24 class ShelfView;
     25 
     26 // OverflowBubble displays the overflown launcher items in a bubble.
     27 class OverflowBubble : public ui::EventHandler,
     28                        public views::WidgetObserver {
     29  public:
     30   OverflowBubble();
     31   virtual ~OverflowBubble();
     32 
     33   // Shows an bubble pointing to |anchor| with |shelf_view| as its content.
     34   void Show(views::View* anchor, ShelfView* shelf_view);
     35 
     36   void Hide();
     37 
     38   // This method as name indicates will hide bubble and schedule paint
     39   // for overflow button.
     40   void HideBubbleAndRefreshButton();
     41 
     42   bool IsShowing() const { return !!bubble_; }
     43   ShelfView* shelf_view() { return shelf_view_; }
     44   OverflowBubbleView* bubble_view() { return bubble_; }
     45 
     46  private:
     47   void ProcessPressedEvent(ui::LocatedEvent* event);
     48 
     49   // Overridden from ui::EventHandler:
     50   virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
     51   virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
     52 
     53   // Overridden from views::WidgetObserver:
     54   virtual void OnWidgetDestroying(views::Widget* widget) OVERRIDE;
     55 
     56   OverflowBubbleView* bubble_;  // Owned by views hierarchy.
     57   views::View* anchor_;  // Owned by ShelfView.
     58   ShelfView* shelf_view_;  // Owned by |bubble_|.
     59 
     60   DISALLOW_COPY_AND_ASSIGN(OverflowBubble);
     61 };
     62 
     63 }  // namespace ash
     64 
     65 #endif  // ASH_SHELF_OVERFLOW_BUBBLE_H_
     66