Check for existing colour names when adding to wxTheColourDatabase

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14041 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/src/msw/gdi.cpp

@@ -5775,6 +5775,25 @@ static PyObject *_wrap_wxColourDatabase_FindName(PyObject *self, PyObject *args,
 }
 
 static void  wxColourDatabase_Append(wxColourDatabase *self,const wxString & name,int  red,int  green,int  blue) {
+            // first see if the name is already there
+            wxString cName = name;
+            cName.MakeUpper();
+            wxString cName2 = cName;
+            if ( !cName2.Replace("GRAY", "GREY") )
+                cName2.clear();
+
+            wxNode *node = self->First();
+            while ( node ) {
+                const wxChar *key = node->GetKeyString();
+                if ( cName == key || cName2 == key ) {
+                    wxColour* c = (wxColour *)node->Data();
+                    c->Set(red, green, blue);
+                    return;
+                }
+                node = node->Next();
+            }
+
+            // otherwise append the new colour
             self->Append(name.c_str(), new wxColour(red, green, blue));
         }
 static PyObject *_wrap_wxColourDatabase_Append(PyObject *self, PyObject *args, PyObject *kwargs) {