text: // Copyright (c) 2009 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_GTK_TOOLBAR_STAR_TOGGLE_GTK_H_
  #define CHROME_BROWSER_GTK_TOOLBAR_STAR_TOGGLE_GTK_H_
  
  #include <gtk/gtk.h>
  
  #include "base/basictypes.h"
  #include "chrome/browser/gtk/custom_button.h"
  #include "chrome/common/notification_observer.h"
  #include "chrome/common/notification_registrar.h"
  #include "chrome/common/owned_widget_gtk.h"
  
  class BrowserToolbarGtk;
  class GtkThemeProvider;
  class GURL;
  
  // Displays the bookmark star button, which toggles between two images.
  class ToolbarStarToggleGtk : public NotificationObserver {
   public:
    explicit ToolbarStarToggleGtk(BrowserToolbarGtk* host);
    ~ToolbarStarToggleGtk();
  
    // Provide NotificationObserver implementation.
    virtual void Observe(NotificationType type,
                         const NotificationSource& source,
                         const NotificationDetails& details);
  
    // If the bubble isn't showing, shows it above the star button.
    void ShowStarBubble(const GURL& url, bool newly_bookmarked);
  
    void SetStarred(bool starred);
  
    GtkWidget* widget() const { return widget_.get(); }
  
   private:
    // Updates the properties of |widget_| when we would need to change its
    // state.
    void UpdateGTKButton();
  
    // Callback for expose, used to draw the custom graphics.
    static gboolean OnExpose(GtkWidget* widget, GdkEventExpose* e,
                             ToolbarStarToggleGtk* obj);
  
    // Callback to get the data associated with a drag.
    static void OnDragDataGet(GtkWidget* widget,
                              GdkDragContext* drag_context,
                              GtkSelectionData* data,
                              guint info,
                              guint time,
                              ToolbarStarToggleGtk* star);
  
    // Used to listen for theme change notifications.
    NotificationRegistrar registrar_;
  
    // The browser toolbar hosting this widget, for getting the current profile.
    BrowserToolbarGtk* host_;
  
    // The actual button widget.
    OwnedWidgetGtk widget_;
  
    // Whether we show the yellow star.
    bool is_starred_;
  
    GtkThemeProvider* theme_provider_;
  
    CustomDrawButtonBase unstarred_;
    CustomDrawButtonBase starred_;
  
    DISALLOW_EVIL_CONSTRUCTORS(ToolbarStarToggleGtk);
  };
  
  #endif  // CHROME_BROWSER_GTK_TOOLBAR_STAR_TOGGLE_GTK_H_
  