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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_TRAY_TRAY_ITEM_VIEW_H_
      6 #define ASH_SYSTEM_TRAY_TRAY_ITEM_VIEW_H_
      7 
      8 #include "ash/ash_export.h"
      9 #include "ui/gfx/animation/animation_delegate.h"
     10 #include "ui/views/view.h"
     11 
     12 namespace gfx {
     13 class SlideAnimation;
     14 }
     15 
     16 namespace views {
     17 class ImageView;
     18 class Label;
     19 }
     20 
     21 namespace ash {
     22 
     23 class SystemTrayItem;
     24 
     25 namespace internal {
     26 
     27 // Base-class for items in the tray. It makes sure the widget is updated
     28 // correctly when the visibility/size of the tray item changes. It also adds
     29 // animation when showing/hiding the item in the tray.
     30 class ASH_EXPORT TrayItemView : public views::View,
     31                                 public gfx::AnimationDelegate {
     32  public:
     33   explicit TrayItemView(SystemTrayItem* owner);
     34   virtual ~TrayItemView();
     35 
     36   static void DisableAnimationsForTest();
     37 
     38   // Convenience function for creating a child Label or ImageView.
     39   void CreateLabel();
     40   void CreateImageView();
     41 
     42   SystemTrayItem* owner() const { return owner_; }
     43   views::Label* label() const { return label_; }
     44   views::ImageView* image_view() const { return image_view_; }
     45 
     46   // Overridden from views::View.
     47   virtual void SetVisible(bool visible) OVERRIDE;
     48   virtual gfx::Size GetPreferredSize() OVERRIDE;
     49   virtual int GetHeightForWidth(int width) OVERRIDE;
     50 
     51  protected:
     52   // Makes sure the widget relayouts after the size/visibility of the view
     53   // changes.
     54   void ApplyChange();
     55 
     56   // This should return the desired size of the view. For most views, this
     57   // returns GetPreferredSize. But since this class overrides GetPreferredSize
     58   // for animation purposes, we allow a different way to get this size, and do
     59   // not allow GetPreferredSize to be overridden.
     60   virtual gfx::Size DesiredSize();
     61 
     62   // The default animation duration is 200ms. But each view can customize this.
     63   virtual int GetAnimationDurationMS();
     64 
     65  private:
     66   // Overridden from views::View.
     67   virtual void ChildPreferredSizeChanged(View* child) OVERRIDE;
     68 
     69   // Overridden from gfx::AnimationDelegate.
     70   virtual void AnimationProgressed(const gfx::Animation* animation) OVERRIDE;
     71   virtual void AnimationEnded(const gfx::Animation* animation) OVERRIDE;
     72   virtual void AnimationCanceled(const gfx::Animation* animation) OVERRIDE;
     73 
     74   SystemTrayItem* owner_;
     75   scoped_ptr<gfx::SlideAnimation> animation_;
     76   views::Label* label_;
     77   views::ImageView* image_view_;
     78 
     79   DISALLOW_COPY_AND_ASSIGN(TrayItemView);
     80 };
     81 
     82 }  // namespace internal
     83 }  // namespace ash
     84 
     85 #endif  // ASH_SYSTEM_TRAY_TRAY_ITEM_VIEW_H_
     86