chrome/browser/ui/gtk/back_forward_button_gtk.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_UI_GTK_BACK_FORWARD_BUTTON_GTK_H_
   6 #define CHROME_BROWSER_UI_GTK_BACK_FORWARD_BUTTON_GTK_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "base/memory/weak_ptr.h"
  11 #include "chrome/browser/ui/gtk/custom_button.h"
  12 #include "chrome/browser/ui/gtk/menu_gtk.h"
  13 #include "ui/base/gtk/gtk_signal.h"
  14
  15 class BackForwardMenuModel;
  16 class Browser;
  17
  18 typedef struct _GtkWidget GtkWidget;
  19
  20 // When clicked, these buttons will navigate forward or backward. When
  21 // pressed and held, they show a dropdown menu of recent web sites.
  22 class BackForwardButtonGtk : MenuGtk::Delegate {
  23  public:
  24   BackForwardButtonGtk(Browser* browser, bool is_forward);
  25   virtual ~BackForwardButtonGtk();
  26
  27   // MenuGtk::Delegate implementation.
  28   virtual void StoppedShowing() OVERRIDE;
  29   virtual bool AlwaysShowIconForCmd(int command_id) const OVERRIDE;
  30
  31   GtkWidget* widget() { return button_->widget(); }
  32
  33  private:
  34   // Executes the browser command.
  35   CHROMEGTK_CALLBACK_0(BackForwardButtonGtk, void, OnClick);
  36
  37   // Starts a timer to show the dropdown menu.
  38   CHROMEGTK_CALLBACK_1(BackForwardButtonGtk, gboolean, OnButtonPress,
  39                        GdkEventButton*);
  40
  41   // If there is a timer to show the dropdown menu, and the mouse has moved
  42   // sufficiently down the screen, cancel the timer and immediately show the
  43   // menu.
  44   CHROMEGTK_CALLBACK_1(BackForwardButtonGtk, gboolean, OnMouseMove,
  45                        GdkEventMotion*);
  46
  47   // Shows the dropdown menu.
  48   void ShowBackForwardMenu(int button, guint32 event_time);
  49
  50   // The menu gets reset every time it is shown.
  51   scoped_ptr<MenuGtk> menu_;
  52
  53   scoped_ptr<CustomDrawButton> button_;
  54
  55   // The browser to which we will send commands.
  56   Browser* browser_;
  57
  58   // Whether this button is a forward button.
  59   bool is_forward_;
  60
  61   // The dropdown menu model.
  62   scoped_ptr<BackForwardMenuModel> menu_model_;
  63
  64   // The y position of the last mouse down event.
  65   int y_position_of_last_press_;
  66
  67   base::WeakPtrFactory<BackForwardButtonGtk> weak_factory_;
  68
  69   DISALLOW_COPY_AND_ASSIGN(BackForwardButtonGtk);
  70 };
  71
  72 #endif  // CHROME_BROWSER_UI_GTK_BACK_FORWARD_BUTTON_GTK_H_