Animate the OverviewButtonTray

ash/system/tray/tray_background_view.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_
 #define ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_
 
 #include "ash/ash_export.h"
 #include "ash/shelf/background_animator.h"
 #include "ash/shelf/shelf_types.h"
 #include "ash/system/tray/actionable_view.h"
+#include "ui/compositor/layer_animation_observer.h"
 #include "ui/views/bubble/tray_bubble_view.h"
 
 namespace ash {
 class ShelfLayoutManager;
 class StatusAreaWidget;
 class TrayEventFilter;
 class TrayBackground;
 
 // Base class for children of StatusAreaWidget: SystemTray, WebNotificationTray,
-// LogoutButtonTray.
+// LogoutButtonTray, OverviewButtonTray.
 // This class handles setting and animating the background when the Launcher
 // his shown/hidden. It also inherits from ActionableView so that the tray
 // items can override PerformAction when clicked on.
 class ASH_EXPORT TrayBackgroundView : public ActionableView,
-                                      public BackgroundAnimatorDelegate {
+                                      public BackgroundAnimatorDelegate,
+                                      public ui::ImplicitAnimationObserver {
  public:
   static const char kViewClassName[];
 
   // Base class for tray containers. Sets the border and layout. The container
   // auto-resizes the widget when necessary.
   class TrayContainer : public views::View {
    public:
     explicit TrayContainer(ShelfAlignment alignment);
     virtual ~TrayContainer() {}
 
     void SetAlignment(ShelfAlignment alignment);
 
     void set_size(const gfx::Size& size) { size_ = size; }
 
-    // Overridden from views::View.
+    // views::View:
     virtual gfx::Size GetPreferredSize() OVERRIDE;
 
    protected:
-    // Overridden from views::View.
+    // views::View:
     virtual void ChildPreferredSizeChanged(views::View* child) OVERRIDE;
     virtual void ChildVisibilityChanged(View* child) OVERRIDE;
     virtual void ViewHierarchyChanged(
         const ViewHierarchyChangedDetails& details) OVERRIDE;
 
    private:
     void UpdateLayout();
 
     ShelfAlignment alignment_;
     gfx::Size size_;
 
     DISALLOW_COPY_AND_ASSIGN(TrayContainer);
   };
 
   explicit TrayBackgroundView(StatusAreaWidget* status_area_widget);
   virtual ~TrayBackgroundView();
 
   // Called after the tray has been added to the widget containing it.
   virtual void Initialize();
 
-  // Overridden from views::View.
+  // views::View:
+  virtual void SetVisible(bool visible) OVERRIDE;
   virtual const char* GetClassName() const OVERRIDE;
   virtual void OnMouseEntered(const ui::MouseEvent& event) OVERRIDE;
   virtual void OnMouseExited(const ui::MouseEvent& event) OVERRIDE;
   virtual void ChildPreferredSizeChanged(views::View* child) OVERRIDE;
   virtual void GetAccessibleState(ui::AXViewState* state) OVERRIDE;
   virtual void AboutToRequestFocusFromTabTraversal(bool reverse) OVERRIDE;
 
-  // Overridden from ActionableView.
+  // ActionableView:
   virtual bool PerformAction(const ui::Event& event) OVERRIDE;
   virtual gfx::Rect GetFocusBounds() OVERRIDE;
 
-  // Overridden from BackgroundAnimatorDelegate.
+  // BackgroundAnimatorDelegate:
   virtual void UpdateBackground(int alpha) OVERRIDE;
 
   // Called whenever the shelf alignment changes.
   virtual void SetShelfAlignment(ShelfAlignment alignment);
 
   // Called when the anchor (tray or bubble) may have moved or changed.
   virtual void AnchorUpdated() {}
 
   // Called from GetAccessibleState, must return a valid accessible name.
   virtual base::string16 GetAccessibleNameForTray() = 0;
@@ skipping 56 matching lines @@
   // Updates the arrow visibility based on the launcher visibility.
   void UpdateBubbleViewArrow(views::TrayBubbleView* bubble_view);
 
  private:
   class TrayWidgetObserver;
 
   // Called from Initialize after all status area trays have been created.
   // Sets the border based on the position of the view.
   void SetTrayBorder();
 
+  // ui::ImplicitAnimationObserver:
+  virtual void OnImplicitAnimationsCompleted() OVERRIDE;
+
+  // Applies transformations to the |layer()| to animate the view when
+  // SetVisible(false) is called.
+  void HideTransformation();
+
   // Unowned pointer to parent widget.
   StatusAreaWidget* status_area_widget_;
 
   // Convenience pointer to the contents view.
   TrayContainer* tray_container_;
 
   // Shelf alignment.
   ShelfAlignment shelf_alignment_;
 
   // Owned by the view passed to SetContents().
@@ skipping 12 matching lines @@
 
   scoped_ptr<TrayWidgetObserver> widget_observer_;
   scoped_ptr<TrayEventFilter> tray_event_filter_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayBackgroundView);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_