Suppressed the themed border by defining GetDefaultBorder

Set custom background style


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@50995 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/datavgen.cpp

@@ -143,7 +143,7 @@ public:
     // called Refresh afterwards
     virtual void ScrollWindow(int dx, int dy, const wxRect *rect = NULL);
 
-    virtual bool CanApplyThemeBorder() const { return false; }
+    virtual wxBorder GetDefaultBorder() const { return wxBORDER_NONE; }
 
 protected:
     virtual bool MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result);
@@ -1964,6 +1964,8 @@ wxDataViewMainWindow::wxDataViewMainWindow( wxDataViewCtrl *parent, wxWindowID i
 
     SetBackgroundColour( *wxWHITE );
 
+    SetBackgroundStyle(wxBG_STYLE_CUSTOM);
+
     m_penRule = wxPen(GetRuleColour(), 1, wxSOLID);
 
     //Here I compose a pen can draw black lines, maybe there are something system colour to use