Added wxDataViewCustomRenderer::RenderText() for renderer simple text in platform dependent way, added wxDataViewSpinRenderer

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@49272 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/generic/dataview.h

@@ -99,6 +99,8 @@ public:
                               wxDataViewCellMode mode = wxDATAVIEW_CELL_INERT,
                               int align = wxDVR_DEFAULT_ALIGNMENT );
 
+    void RenderText( const wxString &text, int xoffset, wxRect cell, wxDC *dc, int state );
+
 protected:
     DECLARE_DYNAMIC_CLASS_NO_COPY(wxDataViewCustomRenderer)
 };