Animate the fullscreen exit bubble's opacity instead of its bounds when in immersive fullscreen

chrome/browser/ui/views/fullscreen_exit_bubble_views.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 CHROME_BROWSER_UI_VIEWS_FULLSCREEN_EXIT_BUBBLE_VIEWS_H_
 #define CHROME_BROWSER_UI_VIEWS_FULLSCREEN_EXIT_BUBBLE_VIEWS_H_
 
 #include "base/compiler_specific.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/ui/fullscreen/fullscreen_exit_bubble.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+#include "ui/views/widget/widget_observer.h"
 
+class BrowserView;
 class GURL;
 namespace ui {
 class SlideAnimation;
 }
 namespace views {
 class View;
 class Widget;
 }
 
 // FullscreenExitBubbleViews is responsible for showing a bubble atop the
 // screen in fullscreen mode, telling users how to exit and providing a click
 // target. The bubble auto-hides, and re-shows when the user moves to the
 // screen top.
-class FullscreenExitBubbleViews : public FullscreenExitBubble {
+class FullscreenExitBubbleViews : public FullscreenExitBubble,
+                                  public content::NotificationObserver,
+                                  public views::WidgetObserver {
  public:
-  FullscreenExitBubbleViews(views::Widget* frame,
-                            Browser* browser,
+  FullscreenExitBubbleViews(BrowserView* browser,
                             const GURL& url,
                             FullscreenExitBubbleType bubble_type);
   virtual ~FullscreenExitBubbleViews();
 
   void UpdateContent(const GURL& url, FullscreenExitBubbleType bubble_type);
 
  private:
   class FullscreenExitView;
 
-  // FullScreenExitBubble
+  enum AnimatedAttribute {
+    ANIMATED_ATTRIBUTE_BOUNDS,
+    ANIMATED_ATTRIBUTE_OPACITY
+  };
+
+  // Starts or stops polling the mouse location based on |popup_| and
+  // |bubble_type_|.
+  void UpdateMouseWatcher();
+
+  // Updates any state which depends on whether the user is in immersive
+  // fullscreen.
+  void UpdateForImmersiveState();
+
+  // Updates |popup|'s bounds given |animation_| and |animated_attribute_|.
+  void UpdateBounds();
+
+  // Returns the root view containing |browser_view_|.
+  views::View* GetBrowserRootView() const;
+
+  // FullScreenExitBubble overrides:
   virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
   virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE;
   virtual gfx::Rect GetPopupRect(bool ignore_animation_state) const OVERRIDE;
   virtual gfx::Point GetCursorScreenPoint() OVERRIDE;
   virtual bool WindowContainsPoint(gfx::Point pos) OVERRIDE;
   virtual bool IsWindowActive() OVERRIDE;
   virtual void Hide() OVERRIDE;
   virtual void Show() OVERRIDE;
   virtual bool IsAnimating() OVERRIDE;
+  virtual bool CanMouseTriggerSlideIn() const OVERRIDE;
 
-  void StartWatchingMouseIfNecessary();
+  // content::NotificationObserver override:
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
 
-  // The root view containing us.
-  views::View* root_view_;
+  // views::WidgetObserver override:
+  virtual void OnWidgetVisibilityChanged(views::Widget* widget,
+                                         bool visible) OVERRIDE;
+
+  BrowserView* browser_view_;
 
   views::Widget* popup_;
 
-  // Animation controlling sliding into/out of the top of the screen.
-  scoped_ptr<ui::SlideAnimation> size_animation_;
+  // Animation controlling showing/hiding of the exit bubble.
+  scoped_ptr<ui::SlideAnimation> animation_;
+
+  // Attribute animated by |animation_|.
+  AnimatedAttribute animated_attribute_;
 
   // The contents of the popup.
   FullscreenExitView* view_;
 
+  content::NotificationRegistrar registrar_;
+
   DISALLOW_COPY_AND_ASSIGN(FullscreenExitBubbleViews);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FULLSCREEN_EXIT_BUBBLE_VIEWS_H_