code: public void dragAndDropByOffset(int xOffset, int yOffset) throws WidgetException {
  		try {
  		 Actions builder = new Actions(getGUIDriver().getWrappedDriver());
  		  synchronized (InteractiveElement.class) {
  		      getGUIDriver().focus();
  		      builder.dragAndDropBy(getWebElement(), xOffset, yOffset).build().perform();
  		  }
  		} catch (Exception e) {
  			throw new WidgetException(
  					"Error while performing drag and drop from " + getByLocator()
  							+ " offset by X: " + xOffset + " Y: " + yOffset, getByLocator(), e);
  		}
  	 }
docs: /*
  (non-Javadoc)
  
  @see
  qc.automation.framework.widget.IInteractiveElement#dragAndDropByOffset(IElement element)