Made DC cacheing less obstrusive

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@10974 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/dc.cpp

@@ -42,6 +42,7 @@
 
 #include "wx/sysopt.h"
 #include "wx/dcprint.h"
+#include "wx/module.h"
 
 #include <string.h>
 #include <math.h>
@@ -1985,6 +1986,19 @@ void wxDC::ClearCache()
     sm_dcCache.DeleteContents(FALSE);
 }
 
+// Clean up cache at app exit
+class wxDCModule : public wxModule
+{
+public:
+    virtual bool OnInit() { return TRUE; }
+    virtual void OnExit() { wxDC::ClearCache(); }
+
+private:
+    DECLARE_DYNAMIC_CLASS(wxDCModule)
+};
+
+IMPLEMENT_DYNAMIC_CLASS(wxDCModule, wxModule)
+
 #endif
     // wxUSE_DC_CACHEING