Implemented drop hander for the Home toolbar button that accepts (only) links

chrome/browser/ui/views/toolbar_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_TOOLBAR_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_TOOLBAR_VIEW_H_
 
 #include <set>
 #include <string>
 
@@ skipping 13 matching lines @@
 
 class BrowserActionsContainer;
 class Browser;
 class WrenchMenu;
 class WrenchMenuModel;
 
 namespace views {
 class MenuListener;
 }
 
+class HomeImageButton : public views::ImageButton {

[Peter Kasting, 2013/01/17 23:48:42]

Nit: We should declare this in its own header, like we do with e.g. the reload
button.

[Tom Cassiotis, 2013/01/18 15:18:49]

Done.

+ public:
+  HomeImageButton(views::ButtonListener* listener, Browser* browser);
+  virtual ~HomeImageButton();
+
+  virtual bool GetDropFormats(
+      int* formats,
+      std::set<OSExchangeData::CustomFormat>* custom_formats) OVERRIDE;
+  virtual bool CanDrop(const OSExchangeData& data) OVERRIDE;
+  virtual int OnDragUpdated(const ui::DropTargetEvent& event) OVERRIDE;
+  virtual int OnPerformDrop(const ui::DropTargetEvent& event) OVERRIDE;
+
+ private:
+  Browser* browser_;
+};
+
 // The Browser Window's toolbar.
 class ToolbarView : public views::AccessiblePaneView,
                     public views::MenuButtonListener,
                     public ui::AcceleratorProvider,
                     public LocationBarView::Delegate,
                     public content::NotificationObserver,
                     public CommandObserver,
                     public views::ButtonListener,
                     public views::WidgetObserver {
  public:
@@ skipping 150 matching lines @@
 
   void OnShowHomeButtonChanged();
 
   // The model that contains the security level, text, icon to display...
   ToolbarModel* model_;
 
   // Controls
   views::ImageButton* back_;
   views::ImageButton* forward_;
   ReloadButton* reload_;
-  views::ImageButton* home_;
+  HomeImageButton* home_;
   LocationBarView* location_bar_;
   BrowserActionsContainer* browser_actions_;
   views::MenuButton* app_menu_;
   Browser* browser_;
 
   // Controls whether or not a home button should be shown on the toolbar.
   BooleanPrefMember show_home_button_;
 
   // A pref that counts how often the bubble has been shown.
   IntegerPrefMember sideload_wipeout_bubble_shown_;
 
   // The display mode used when laying out the toolbar.
   DisplayMode display_mode_;
 
   // Wrench model and menu.
   // Note that the menu should be destroyed before the model it uses, so the
   // menu should be listed later.
   scoped_ptr<WrenchMenuModel> wrench_menu_model_;
   scoped_ptr<WrenchMenu> wrench_menu_;
 
   // A list of listeners to call when the menu opens.
   ObserverList<views::MenuListener> menu_listeners_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ToolbarView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_VIEW_H_