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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 
     23 namespace internal {
     24 
     25 class OverflowBubbleView;
     26 class ShelfLayoutManager;
     27 class ShelfView;
     28 
     29 // OverflowBubble displays the overflown launcher items in a bubble.
     30 class OverflowBubble : public ui::EventHandler,
     31                        public views::WidgetObserver {
     32  public:
     33   OverflowBubble();
     34   virtual ~OverflowBubble();
     35 
     36   // Shows an bubble pointing to |anchor| with |shelf_view| as its content.
     37   void Show(views::View* anchor, ShelfView* shelf_view);
     38 
     39   void Hide();
     40 
     41   // This method as name indicates will hide bubble and schedule paint
     42   // for overflow button.
     43   void HideBubbleAndRefreshButton();
     44 
     45   bool IsShowing() const { return !!bubble_; }
     46   ShelfView* shelf_view() { return shelf_view_; }
     47   OverflowBubbleView* bubble_view() { return bubble_; }
     48 
     49  private:
     50   void ProcessPressedEvent(ui::LocatedEvent* event);
     51 
     52   // Overridden from ui::EventHandler:
     53   virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
     54   virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
     55 
     56   // Overridden from views::WidgetObserver:
     57   virtual void OnWidgetDestroying(views::Widget* widget) OVERRIDE;
     58 
     59   OverflowBubbleView* bubble_;  // Owned by views hierarchy.
     60   views::View* anchor_;  // Owned by ShelfView.
     61   ShelfView* shelf_view_;  // Owned by |bubble_|.
     62 
     63   DISALLOW_COPY_AND_ASSIGN(OverflowBubble);
     64 };
     65 
     66 }  // namespace internal
     67 }  // namespace ash
     68 
     69 #endif  // ASH_SHELF_OVERFLOW_BUBBLE_H_
     70