Made notification center notifications collapsed and expandable.

ui/message_center/views/message_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 UI_MESSAGE_CENTER_VIEWS_MESSAGE_VIEW_H_
 #define UI_MESSAGE_CENTER_VIEWS_MESSAGE_VIEW_H_
 
 #include "ui/gfx/insets.h"
 #include "ui/message_center/notification.h"
-#include "ui/message_center/notification_list.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/slide_out_view.h"
-#include "ui/views/view.h"
 
 namespace views {
 class ImageButton;
+class ImageView;
 class ScrollView;
 }
 
 namespace message_center {
 
+class NotificationChangeObserver;
+
 // Individual notifications constants.
 const int kPaddingBetweenItems = 10;
 const int kPaddingHorizontal = 18;
 const int kWebNotificationButtonWidth = 32;
 const int kWebNotificationIconSize = 40;
 const int kWebNotificationWidth = 300;
 
 // An abstract class that forms the basis of a view for a notification entry.
 class MessageView : public views::SlideOutView,
                     public views::ButtonListener {
  public:
-  MessageView(NotificationList::Delegate* list_delegate,
-              const Notification& notification);
-
+  MessageView(const Notification& notification,
+              NotificationChangeObserver* observer,
+              bool expanded);
   virtual ~MessageView();
 
   // Returns the insets for the shadow it will have for rich notification.
   static gfx::Insets GetShadowInsets();
 
-  void set_scroller(views::ScrollView* scroller) { scroller_ = scroller; }
+  // Adjust to any change in notification data or expanded status.
+  virtual void Update(const Notification& notification);
 
-  // Overridden from views::View.
+  // Overridden from views::View:
   virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
 
-  // Overridden from ui::EventHandler.
+  // Overridden from ui::EventHandler:
   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
 
-  // Overridden from ButtonListener.
+  // Overridden from ButtonListener:
   virtual void ButtonPressed(views::Button* sender,
                              const ui::Event& event) OVERRIDE;
 
+  void set_scroller(views::ScrollView* scroller) { scroller_ = scroller; }
+
  protected:
   MessageView();
 
   // Shows the menu for the notification.
   void ShowMenu(gfx::Point screen_location);
 
-  // Overridden from views::SlideOutView.
+  // Overridden from views::SlideOutView:
   virtual void OnSlideOut() OVERRIDE;
 
-  NotificationList::Delegate* list_delegate() { return list_delegate_; }
+  NotificationChangeObserver* observer() { return observer_; }
   const std::string& notification_id() { return notification_id_; }
   const string16& display_source() const { return display_source_; }
   const std::string& extension_id() const { return extension_id_; }
   views::ImageButton* close_button() { return close_button_.get(); }
+  views::ImageButton* expand_button() { return expand_button_.get(); }
   views::ScrollView* scroller() { return scroller_; }
+  const bool is_expanded() { return is_expanded_; }
 
  private:
-  NotificationList::Delegate* list_delegate_; // Weak, global (MessageCenter).
+  NotificationChangeObserver* observer_;  // Weak reference.
   std::string notification_id_;
   string16 display_source_;
   std::string extension_id_;
 
   scoped_ptr<views::ImageButton> close_button_;
+  scoped_ptr<views::ImageButton> expand_button_;
+  views::ScrollView* scroller_;
 
-  views::ScrollView* scroller_;
+  bool is_expanded_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageView);
 };
 
 }  // namespace message_center
 
 #endif // UI_MESSAGE_CENTER_VIEWS_MESSAGE_VIEW_H_