Listener listener = new Listener() {
   public void handleEvent(Event event) {
	switch (event.type) {
		case SWT.MouseDown:
			mouseDownXCoor = event.x;
			mouseDownYCoor = event.y;

			drag = true;
                        break;

		case SWT.MouseMove:
			if (drag) {
				mouseUpXCoor = event.x;
				mouseUpYCoor = event.y;
				lineChartViewer.redraw();
			}
			break;

		case SWT.MouseUp:
			mouseUpXCoor = event.x;
			mouseUpYCoor = event.y;
			drag = false;
			break;

		case SWT.Paint:
			if (drag) {
			    GC gc = event.gc;
			    gc.setBackground(Display.getDefault().getSystemColor(SWT.COLOR_BLACK));
			    gc.setAlpha(128);

		  	    int minX = Math.min(mouseDownXCoor, mouseUpXCoor);
  			    int minY = Math.min(mouseDownYCoor, mouseUpYCoor);
  			    
                            int maxX = Math.max(mouseDownXCoor, mouseUpXCoor);
			    int maxY = Math.max(mouseDownYCoor, mouseUpYCoor);

			    int width = maxX - minX;
			    int height = maxY - minY;

			    gc.fillRectangle(minX, minY, width, height);
			}
		        break;
		}
	}
};
lineChartViewer.addListener(SWT.MouseDown, listener);
lineChartViewer.addListener(SWT.MouseMove, listener);
lineChartViewer.addListener(SWT.MouseUp, listener);
lineChartViewer.addListener(SWT.Paint, listener);

LineSeries ls = (LineSeries) LineSeriesImpl.create();

ls.getTriggers().add(TriggerImpl.create(TriggerCondition.ONMOUSEUP_LITERAL,
            			ActionImpl.create(ActionType.CALL_BACK_LITERAL,
            			CallBackValueImpl.create(String.valueOf(ls.getSeriesIdentifier())))
            			));