added wxListCtrl::GetSubItemRect() and subitem hit testing (patch 1476971)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39385 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/listctrl/listtest.h

@@ -76,6 +76,8 @@ public:
     void OnContextMenu(wxContextMenuEvent& event);
 #endif
 
+    void OnRightClick(wxMouseEvent& event);
+
 private:
     void ShowContextMenu(const wxPoint& pos);
     wxLog *m_logOld;