Added reload drop-down menu for the Reload button on Linux when in the DevTools mode.

chrome/browser/ui/gtk/reload_button_gtk.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_GTK_RELOAD_BUTTON_GTK_H_
 #define CHROME_BROWSER_UI_GTK_RELOAD_BUTTON_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/timer.h"
 #include "chrome/browser/ui/gtk/custom_button.h"
+#include "chrome/browser/ui/gtk/menu_gtk.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
+#include "ui/base/models/simple_menu_model.h"
 #include "ui/base/gtk/gtk_signal.h"
 #include "ui/base/gtk/owned_widget_gtk.h"
 
 class Browser;
 class GtkThemeService;
 class LocationBarViewGtk;
 
-class ReloadButtonGtk : public content::NotificationObserver {
+class ReloadButtonGtk : public content::NotificationObserver,
+                        MenuGtk::Delegate,
+                        public ui::SimpleMenuModel::Delegate {
  public:
   enum Mode { MODE_RELOAD = 0, MODE_STOP };
 
   ReloadButtonGtk(LocationBarViewGtk* location_bar, Browser* browser);
   virtual ~ReloadButtonGtk();
 
   GtkWidget* widget() const { return widget_.get(); }
 
   // Ask for a specified button state.  If |force| is true this will be applied
   // immediately.
   void ChangeMode(Mode mode, bool force);
 
   // Provide content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
+  // Provide MenuGtk::Delegate implementation.
+  virtual void StoppedShowing() OVERRIDE;
+
+  // Provide SimpleMenuModel::Delegate implementation.
+  virtual bool IsCommandIdChecked(int command_id) const OVERRIDE;
+  virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE;
+  virtual bool IsCommandIdVisible(int command_id) const OVERRIDE;
+  virtual bool GetAcceleratorForCommandId(
+     int command_id,
+     ui::Accelerator* accelerator) OVERRIDE;
+  virtual void ExecuteCommand(int command_id) OVERRIDE;
+
  private:
   friend class ReloadButtonGtkTest;
 
   CHROMEGTK_CALLBACK_0(ReloadButtonGtk, void, OnClicked);
   CHROMEGTK_CALLBACK_1(ReloadButtonGtk, gboolean, OnExpose, GdkEventExpose*);
   CHROMEGTK_CALLBACK_1(ReloadButtonGtk,
                        gboolean,
                        OnLeaveNotify,
                        GdkEventCrossing*);
   CHROMEGTK_CALLBACK_4(ReloadButtonGtk,
                        gboolean,
                        OnQueryTooltip,
                        gint,
                        gint,
                        gboolean,
                        GtkTooltip*);
 
+  // Starts a timer to show the dropdown menu.
+  CHROMEGTK_CALLBACK_1(ReloadButtonGtk,
+                       gboolean,
+                       OnButtonPress,
+                       GdkEventButton*);
+
+  // If there is a timer to show the dropdown menu, and the mouse has moved
+  // sufficiently down the screen, cancel the timer and immediately show the
+  // menu.
+  CHROMEGTK_CALLBACK_1(ReloadButtonGtk,
+                       gboolean,
+                       OnMouseMove,
+                       GdkEventMotion*);
+
   void UpdateThemeButtons();
 
   void OnDoubleClickTimer();
   void OnStopToReloadTimer();
 
+  // Shows the dropdown menu.
+  void ShowReloadMenu(int button, guint32 event_time);
+
+  // Do actual reload. command == 0, indicates default dehaviour.
+  void DoReload(int command);
+
+  // Indicates if reload menu is currently enabled.
+  bool ReloadMenuEnabled();
+  void ClearCache();
+
   base::OneShotTimer<ReloadButtonGtk> double_click_timer_;
   base::OneShotTimer<ReloadButtonGtk> stop_to_reload_timer_;
 
   // These may be NULL when testing.
   LocationBarViewGtk* const location_bar_;
   Browser* const browser_;
 
   // The mode we should be in assuming no timers are running.
   Mode intended_mode_;
 
   // The currently-visible mode - this may differ from the intended mode.
   Mode visible_mode_;
 
   // Used to listen for theme change notifications.
   content::NotificationRegistrar registrar_;
 
   GtkThemeService* theme_service_;
 
   CustomDrawButtonBase reload_;
   CustomDrawButtonBase stop_;
   CustomDrawHoverController hover_controller_;
 
   ui::OwnedWidgetGtk widget_;
 
   // The delay times for the timers.  These are members so that tests can modify
   // them.
   base::TimeDelta double_click_timer_delay_;
   base::TimeDelta stop_to_reload_timer_delay_;
 
+  // The y position of the last mouse down event.
+  int y_position_of_last_press_;
+  base::WeakPtrFactory<ReloadButtonGtk> weak_factory_;
+  // The menu gets reset every time it is shown.
+  scoped_ptr<MenuGtk> menu_;
+  // The dropdown menu model.
+  scoped_ptr<ui::SimpleMenuModel> menu_model_;
+  // Indicates if menu is currently shown.
+  bool menu_visible_;
+
   // TESTING ONLY
   // True if we should pretend the button is hovered.
   bool testing_mouse_hovered_;
   // Increments when we would tell the browser to "reload", so
   // test code can tell whether we did so (as there may be no |browser_|).
   int testing_reload_count_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(ReloadButtonGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_RELOAD_BUTTON_GTK_H_