Implements the "Set to default" button on the zoom bubble.

chrome/browser/ui/views/location_bar/zoom_bubble_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 CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_ZOOM_BUBBLE_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_ZOOM_BUBBLE_VIEW_H_
 
 #include "base/basictypes.h"
 #include "base/timer.h"
 #include "ui/views/bubble/bubble_delegate.h"
 #include "ui/views/controls/button/button.h"
+#include "ui/views/controls/button/text_button.h"
 #include "ui/views/controls/label.h"
+#include "ui/views/events/event.h"
+
+class TabContents;
 
 // View used to display the zoom percentage when it has changed.
-class ZoomBubbleView : public views::BubbleDelegateView {
+class ZoomBubbleView : public views::ButtonListener,

[Peter Kasting, 2012/07/26 01:36:14]

Nit: Maybe makes sense to put BubbleDelegateView first (and its overriding
methods first, etc.) since that feels like the most applicable "implements-a"
class for this, as opposed to ButtonListener, which feels like a more peripheral
base class?  I'm not sure if I'm being super-vague here...

[Kyle Horimoto, 2012/08/03 03:33:29]

Done.

+                       public views::BubbleDelegateView {
  public:
   // Shows the bubble and automatically closes it after a short time period if
   // |auto_close| is true.
   static void ShowBubble(views::View* anchor_view,
-                         int zoom_percent,
+                         TabContents* tab_contents,
                          bool auto_close);
   static void CloseBubble();
   static bool IsShowing();
 
  private:
   ZoomBubbleView(views::View* anchor_view,
-                 int zoom_percent,
+                 TabContents* tab_contents,
                  bool auto_close);
   virtual ~ZoomBubbleView();
 
+  // Refreshes the bubble by changing the zoom percentage appropriately and
+  // resetting the timer if necessary.
+  void Refresh();
+
   void Close();
 
+  // Starts a timer which will close the bubble if |auto_close_| is true.
+  void StartTimerIfNecessary();
+
+  // Stops the auto-close timer.
+  void StopTimer();
+
+  // views::View method.
+  virtual void OnMouseMoved(const views::MouseEvent& event) OVERRIDE;
+  virtual void OnMouseExited(const views::MouseEvent& event) OVERRIDE;
+
+  // views::ButtonListener method.
+  virtual void ButtonPressed(views::Button* sender,
+                             const views::Event& event) OVERRIDE;
+
   // views::BubbleDelegateView method.
   virtual void Init() OVERRIDE;
+  virtual gfx::Rect GetAnchorRect() OVERRIDE;
 
-  // views::BubbleDelegateView:
+  // views::BubbleDelegateView method.

[Peter Kasting, 2012/07/26 01:36:14]

Nit: Group all overrides from the same base class together.

[Kyle Horimoto, 2012/08/03 03:33:29]

Done.

   virtual void WindowClosing() OVERRIDE;
 
   // Singleton instance of the zoom bubble. The zoom bubble can only be shown on
   // the active browser window, so there is no case in which it will be shown
   // twice at the same time.
   static ZoomBubbleView* zoom_bubble_;
 
   // Timer used to close the bubble when |auto_close_| is true.
   base::OneShotTimer<ZoomBubbleView> timer_;
 
   // Label displaying the zoom percentage.
   views::Label* label_;
 
-  // The zoom percentage to show in the bubble.
-  int zoom_percent_;
+  // The TabContents for the page whose zoom has changed.
+  TabContents* tab_contents_;
 
   // Whether the currently displayed bubble will automatically close.
   bool auto_close_;
 
+  // Private class used to display a text button to use custom mouse events.
+  // Because TextButtons already override mouse event handler methods to draw
+  // borders, this class is necessary to continue to provide that functionality
+  // while correctly handling auto-closing behavior of the zoom bubble.
+  class ZoomBubbleViewTextButton : public views::TextButton {
+   public:
+    ZoomBubbleViewTextButton(ZoomBubbleView* listener, const string16& text);
+    virtual ~ZoomBubbleViewTextButton() {}
+    virtual void OnMouseMoved(const views::MouseEvent& event) OVERRIDE;
+    virtual void OnMouseExited(const views::MouseEvent& event) OVERRIDE;
+
+   private:
+    ZoomBubbleView* delegate_;
+  };
+
+  // Give the button access to ZoomBubbleView's internals.

[Peter Kasting, 2012/07/26 01:36:14]

It seems better to me to make Start/StopTimer() be public, which I think would
eliminate the need for this to be a friend.  You could also then declare and
define it completely within the .cc file rather than making it a member class.

(Note this is not necessary if we can eliminate this class entirely by mucking
with set_notify_enter_exit_on_child(), or in extreme GetEventHandlerForPoint(),
see comments in other file.)

[Kyle Horimoto, 2012/08/03 03:33:29]

Ended up fixing the other part, so this is no longer necessary.

+  friend class ZoomBubbleViewTextButton;
+
   DISALLOW_COPY_AND_ASSIGN(ZoomBubbleView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_ZOOM_BUBBLE_VIEW_H_