minor cleanup; add wxDocument::OnChangeFilename for coherence with wxView::OnChangefilename; avoid some (small) code duplication; closes #10080

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57950 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/docview.h

@@ -107,6 +107,10 @@ public:
     // modified to false)
     virtual bool OnSaveModified();
 
+    // if you override, remember to call the default 
+    // implementation (wxDocument::OnChangeFilename)
+    virtual void OnChangeFilename(bool notifyViews);
+
     // Called by framework if created automatically by the default document
     // manager: gives document a chance to initialise and (usually) create a
     // view