added possibility to customize the listbox colours

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@21138 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/vlbox.h

@@ -120,6 +120,9 @@ public:
     // get the margins around each item
     wxPoint GetMargins() const { return m_ptMargins; }
 
+    // get the background colour of selected cells
+    const wxColour& GetSelectionBackground() const { return m_colBgSel; }
+
 
     // operations
     // ----------
@@ -179,6 +182,9 @@ public:
     void SetMargins(const wxPoint& pt);
     void SetMargins(wxCoord x, wxCoord y) { SetMargins(wxPoint(x, y)); }
 
+    // change the background colour of the selected cells
+    void SetSelectionBackground(const wxColour& col);
+
 
 protected:
     // the derived class must implement this function to actually draw the item
@@ -258,6 +264,10 @@ private:
     // margins
     wxPoint m_ptMargins;
 
+    // the selection bg colour
+    wxColour m_colBgSel;
+
+
     DECLARE_EVENT_TABLE()
 };