Introduce virtual void Fl_Menu_Bar::update() with a platform-specific reimplementation to support Fl_Sys_Menu_Bar.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@12015 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

FL/Fl_Menu_Bar.H

@@ -88,6 +88,10 @@ public:
     menu items.
   */
   Fl_Menu_Bar(int X, int Y, int W, int H, const char *l=0);
+  /** Updates the menu bar after any change to its items.
+   This is useful when the menu bar can be an Fl_Sys_Menu_Bar object.
+   */
+  virtual void update() {}
 };
 
 #endif

FL/Fl_Sys_Menu_Bar.H

@@ -33,7 +33,7 @@
  
  Changes to the menu state are immediately visible in the menubar when they are made
  using member functions of the Fl_Sys_Menu_Bar class. Other changes (e.g., by a call to
- Fl_Menu_Item::set()) should be followed by a call to Fl_Sys_Menu_Bar::update() to be
+ Fl_Menu_Item::set()) should be followed by a call to update() to be
  visible in the menubar across all platforms.
  
   A few FLTK features are not supported by the Mac System menu:
@@ -53,7 +53,7 @@ public:
    */
   const Fl_Menu_Item *menu() const {return Fl_Menu_::menu();}
   void menu(const Fl_Menu_Item *m);
-  void update();
+  virtual void update();
   int add(const char* label, int shortcut, Fl_Callback*, void *user_data=0, int flags=0);
   /** Adds a new menu item. 
    \see Fl_Menu_::add(const char* label, int shortcut, Fl_Callback*, void *user_data=0, int flags=0)
@@ -100,12 +100,7 @@ public:
 
 #else
 
-class FL_EXPORT Fl_Sys_Menu_Bar : public Fl_Menu_Bar {
+typedef Fl_Menu_Bar Fl_Sys_Menu_Bar;
-public:
-  Fl_Sys_Menu_Bar(int x,int y,int w,int h,const char *l=0) : Fl_Menu_Bar(x,y,w,h,l) {}
-  inline void update() {}
-};
-
 
 #endif // defined(__APPLE__) || defined(FL_DOXYGEN)
 

src/Fl_Sys_Menu_Bar.mm

@@ -458,8 +458,6 @@ void Fl_Sys_Menu_Bar::replace(int index, const char *name)
   update();
 }
 
-/** Updates the system menu after any change to its items.
- */
 void Fl_Sys_Menu_Bar::update()
 {
   convertToMenuBar(Fl_Menu_::menu());