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      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 ASH_SYSTEM_STATUS_AREA_WIDGET_DELEGATE_H_
      6 #define ASH_SYSTEM_STATUS_AREA_WIDGET_DELEGATE_H_
      7 
      8 #include "ash/ash_export.h"
      9 #include "ash/shelf/shelf_types.h"
     10 #include "ash/wm/gestures/shelf_gesture_handler.h"
     11 #include "ui/gfx/image/image_skia.h"
     12 #include "ui/views/accessible_pane_view.h"
     13 #include "ui/views/widget/widget_delegate.h"
     14 
     15 namespace ash {
     16 namespace internal {
     17 
     18 class FocusCycler;
     19 
     20 class ASH_EXPORT StatusAreaWidgetDelegate : public views::AccessiblePaneView,
     21                                             public views::WidgetDelegate {
     22  public:
     23   StatusAreaWidgetDelegate();
     24   virtual ~StatusAreaWidgetDelegate();
     25 
     26   // Add a tray view to the widget (e.g. system tray, web notifications).
     27   void AddTray(views::View* tray);
     28 
     29   // Called whenever layout might change (e.g. alignment changed).
     30   void UpdateLayout();
     31 
     32   // Sets the focus cycler.
     33   void SetFocusCyclerForTesting(const FocusCycler* focus_cycler);
     34 
     35   void set_alignment(ShelfAlignment alignment) { alignment_ = alignment; }
     36 
     37   // Overridden from views::AccessiblePaneView.
     38   virtual View* GetDefaultFocusableChild() OVERRIDE;
     39 
     40   // Overridden from views::View:
     41   virtual views::Widget* GetWidget() OVERRIDE;
     42   virtual const views::Widget* GetWidget() const OVERRIDE;
     43 
     44   // Overridden from ui::EventHandler:
     45   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
     46 
     47   // views::WidgetDelegate overrides:
     48   virtual bool CanActivate() const OVERRIDE;
     49   virtual void DeleteDelegate() OVERRIDE;
     50 
     51  protected:
     52   // Overridden from views::View:
     53   virtual void ChildPreferredSizeChanged(views::View* child) OVERRIDE;
     54   virtual void ChildVisibilityChanged(views::View* child) OVERRIDE;
     55 
     56  private:
     57   void UpdateWidgetSize();
     58 
     59   const FocusCycler* focus_cycler_for_testing_;
     60   ShelfAlignment alignment_;
     61 
     62   ShelfGestureHandler gesture_handler_;
     63 
     64   DISALLOW_COPY_AND_ASSIGN(StatusAreaWidgetDelegate);
     65 };
     66 
     67 }  // namespace internal
     68 }  // namespace ash
     69 
     70 #endif  // ASH_SYSTEM_STATUS_AREA_WIDGET_DELEGATE_H_
     71