hideShowLayer = new ColumnHideShowLayer(reorderLayer);
selectionLayer = new SelectionLayer(hideShowLayer);
viewportLayer = new ViewportLayer(selectionLayer);
freezeLayer = new FreezeLayer(selectionLayer);
compositeFreezeLayer = new CompositeFreezeLayer(freezeLayer,
viewportLayer, selectionLayer);
compositeFreezeLayer.setClientAreaProvider(new IClientAreaProvider() {
public Rectangle getClientArea() {
return new Rectangle(0, 0, 400, 160);