bodyDataProvider = setupBodyDataProvider();
		DataLayer bodyDataLayer = new DataLayer(bodyDataProvider);
		//stack
		ColumnReorderLayer columnReorderLayer = new ColumnReorderLayer(bodyDataLayer);
		
		ColumnHideShowLayer columnHideShowLayer = new ColumnHideShowLayer(columnReorderLayer);
		SelectionLayer selectionLayer = new SelectionLayer(columnHideShowLayer);
		ViewportLayer viewportLayer = new ViewportLayer(selectionLayer){
			
			boolean isGridResizeOn= true;
			
			@Override
			public boolean doCommand(ILayerCommand command) {
				boolean result; 
						
				if(command instanceof ClientAreaResizeCommand){
					isGridResizeOn = false;
					result = super.doCommand(command);
					isGridResizeOn = false;
					natTable.getVerticalBar().setVisible(false);
					natTable.getVerticalBar().setEnabled(false);
					handleGridResize();					
				}else{
					return super.doCommand(command);
				}
				return result;
			}
			@Override
			protected void handleGridResize() {
				if(isGridResizeOn){
					natTable.getVerticalBar().setVisible(false);
					natTable.getVerticalBar().setEnabled(false);
					super.handleGridResize();
				}
			}
		};
		
		FreezeLayer freezeLayer = new FreezeLayer(selectionLayer);
		
		
	    final CompositeFreezeLayer compositeFreezeLayer = new CompositeFreezeLayer(freezeLayer, viewportLayer, selectionLayer);
	    

Display.getDefault().addFilter(SWT.KeyDown, new Listener(){
	int cnt = 0;

	@Override
	public void handleEvent(Event event) {
		int y = natTable.getVerticalBar().getSelection();
		
		//getting the table row by pixel
		int row = viewportLayer.getRowPositionByY(cnt+=1000);
		System.out.println("resulted row: "+row+" by using count "+cnt);
		
		viewportLayer.setOriginRowPosition(row);