ash/system/tray/tray_item_view.h

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