DataLayer rowHeaderDataLayer = new DataLayer(rowHeaderDataProvider);
rowHeaderDataLayer.setDefaultColumnWidth(40);
ILayer rowHeaderLayer = new RowHeaderLayer(rowHeaderDataLayer,
viewportLayer, selectionLayer);
ILayer cornerLayer = new CornerLayer(new DataLayer(
new DefaultCornerDataProvider(columnHeaderDataProvider,
rowHeaderDataProvider)), rowHeaderLayer,
columnHeaderLayer);
layer = new GridLayer(viewportLayer, columnHeaderLayer, rowHeaderLayer,