added showSubmenu in MenuItem

src/FbTk/Menu.cc

@@ -734,7 +734,7 @@ void Menu::drawSubmenu(unsigned int index) {
             clearItem(index);
 		
         if (! item->submenu()->isVisible()) {
-            item->submenu()->show();
+            item->showSubmenu();
             item->submenu()->raise();
         }
 			

src/FbTk/MenuItem.cc

@@ -29,6 +29,7 @@
 #include "Image.hh"
 #include "App.hh"
 #include "StringUtil.hh"
+#include "Menu.hh"
 
 namespace FbTk {
 
@@ -297,4 +298,9 @@ void MenuItem::updateTheme(const MenuTheme &theme) {
 
 }
 
+void MenuItem::showSubmenu() { 
+    if (submenu() != 0) 
+        submenu()->show(); 
+}
+
 }; // end namespace FbTk

src/FbTk/MenuItem.hh

@@ -94,13 +94,13 @@ public:
     virtual inline void setLabel(const char *label) { m_label = (label ? label : ""); }
     virtual inline void setToggleItem(bool val) { m_toggle_item = val; }
     void setIcon(const std::string &filename, int screen_num);
-    Menu *submenu() { return m_submenu; }
+    virtual Menu *submenu() { return m_submenu; }
     /** 
         @name accessors
     */
     //@{
     virtual inline const std::string &label() const { return m_label; }
-    inline const Menu *submenu() const { return m_submenu; } 
+    virtual const Menu *submenu() const { return m_submenu; } 
     virtual inline bool isEnabled() const { return m_enabled; }
     virtual inline bool isSelected() const { return m_selected; }
     virtual inline bool isToggleItem() const { return m_toggle_item; }
@@ -120,6 +120,8 @@ public:
        @param time the time stamp 
     */
     virtual void click(int button, int time);
+    /// must use this to show submenu to ensure consistency for object like window menu in ClientMenu (see Workspace.cc)
+    virtual void showSubmenu();
     RefCount<Command> &command() { return m_command; }
     const RefCount<Command> &command() const { return m_command; }
     //@}