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 "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 class SystemTrayItem;
  23
  24 // Base-class for items in the tray. It makes sure the widget is updated
  25 // correctly when the visibility/size of the tray item changes. It also adds
  26 // animation when showing/hiding the item in the tray.
  27 class ASH_EXPORT TrayItemView : public views::View,
  28                                 public gfx::AnimationDelegate {
  29  public:
  30   explicit TrayItemView(SystemTrayItem* owner);
  31   ~TrayItemView() override;
  32
  33   static void DisableAnimationsForTest();
  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   void SetVisible(bool visible) override;
  45   gfx::Size GetPreferredSize() const override;
  46   int GetHeightForWidth(int width) const override;
  47
  48  protected:
  49   // Makes sure the widget relayouts after the size/visibility of the view
  50   // changes.
  51   void ApplyChange();
  52
  53   // This should return the desired size of the view. For most views, this
  54   // returns GetPreferredSize. But since this class overrides GetPreferredSize
  55   // for animation purposes, we allow a different way to get this size, and do
  56   // not allow GetPreferredSize to be overridden.
  57   virtual gfx::Size DesiredSize() const;
  58
  59   // The default animation duration is 200ms. But each view can customize this.
  60   virtual int GetAnimationDurationMS();
  61
  62  private:
  63   // Overridden from views::View.
  64   void ChildPreferredSizeChanged(View* child) override;
  65
  66   // Overridden from gfx::AnimationDelegate.
  67   void AnimationProgressed(const gfx::Animation* animation) override;
  68   void AnimationEnded(const gfx::Animation* animation) override;
  69   void AnimationCanceled(const gfx::Animation* animation) override;
  70
  71   SystemTrayItem* owner_;
  72   scoped_ptr<gfx::SlideAnimation> animation_;
  73   views::Label* label_;
  74   views::ImageView* image_view_;
  75
  76   DISALLOW_COPY_AND_ASSIGN(TrayItemView);
  77 };
  78
  79 }  // namespace ash
  80
  81 #endif  // ASH_SYSTEM_TRAY_TRAY_ITEM_VIEW_H_