Added wxFrameBase::OnMenuOpen, and wxUSE_IDLEMENUUPDATES in platform.h

Experimental wxUpdateUIEvent::SetUpdateInterval() function to limit
UI update frequency


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@21746 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/event.h

@@ -1529,6 +1529,20 @@ public:
     void Enable(bool enable) { m_enabled = enable; m_setEnabled = TRUE; }
     void SetText(const wxString& text) { m_text = text; m_setText = TRUE; }
 
+    // Sets the interval between updates in milliseconds.
+    // Set to -1 to disable updates, or to 0 to update as frequently as possible.
+    static void SetUpdateInterval(long updateInterval) { m_updateInterval = updateInterval; }
+
+    // Returns the current interval between updates in milliseconds
+    static long GetUpdateInterval() { return m_updateInterval ; }
+
+    // Can we update?
+    static bool CanUpdate() ;
+
+    // Reset the update time to provide a delay until the next
+    // time we should update
+    static void ResetUpdateTime() ;
+
     virtual wxEvent *Clone() const { return new wxUpdateUIEvent(*this); }
 
 protected:
@@ -1538,6 +1552,10 @@ protected:
     bool          m_setText;
     bool          m_setChecked;
     wxString      m_text;
+#if wxUSE_LONGLONG
+    static wxLongLong   m_lastUpdate;
+#endif
+    static long         m_updateInterval;
 
 private:
     DECLARE_DYNAMIC_CLASS(wxUpdateUIEvent)

include/wx/frame.h

@@ -142,6 +142,7 @@ public:
 
     // event handlers
     void OnIdle(wxIdleEvent& event);
+    void OnMenuOpen(wxMenuEvent& event);
     void OnMenuHighlight(wxMenuEvent& event);
 
 #if wxUSE_MENUS

include/wx/platform.h

@@ -327,5 +327,17 @@
     #endif
 #endif
 
+/* Choose which method we will use for updating menus
+ * - in OnIdle, or when we receive a wxEVT_MENU_OPEN event.
+ * Presently, only Windows and GTK+ support wxEVT_MENU_OPEN.
+ */
+#ifndef wxUSE_IDLEMENUUPDATES
+    #if defined(__WXMSW__) || defined(__WXGTK__)
+        #define wxUSE_IDLEMENUUPDATES 0
+    #else
+        #define wxUSE_IDLEMENUUPDATES 1
+    #endif
+#endif
+
 #endif /* _WX_PLATFORM_H_ */