it is not possible to show/hide the window from the UpdateUI event handler; refactored the code by moving control-specific parts into the derived classes (patch 1338350)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@37536 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/checkbox.h

@@ -108,6 +108,13 @@ public:
 
     virtual bool HasTransparentBackground() { return true; }
 
+    // wxCheckBox-specific processing after processing the update event
+    virtual void DoUpdateWindowUI(wxUpdateUIEvent& event)
+    {
+        if ( event.GetSetChecked() )
+            SetValue(event.GetChecked());
+    }
+
 protected:
     virtual void DoSet3StateValue(wxCheckBoxState WXUNUSED(state)) { wxFAIL; }