Added accessors for the sub-windows in the wxGrid.

Added methods to get/set the pen width used for the current cell
highlight, bot normal and read-only.

Fixed (I think) the problem of the cell highlight leaving extra lines
behind when the grid lines are turned off


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@10092 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/newgrid/griddemo.h

@@ -83,6 +83,9 @@ class GridFrame : public wxFrame
     void OnEditorShown(wxGridEvent&);
     void OnEditorHidden(wxGridEvent&);
 
+    void OnSetHighlightWidth(wxCommandEvent&);
+    void OnSetROHighlightWidth(wxCommandEvent&);
+
 public:
     GridFrame();
     ~GridFrame();
@@ -135,6 +138,9 @@ public:
         ID_DESELECT_COL,
         ID_DESELECT_CELL,
 
+        ID_SET_HIGHLIGHT_WIDTH,
+        ID_SET_RO_HIGHLIGHT_WIDTH,
+
         ID_TESTFUNC
     };