/**
	 * Add listener to Horizontal ScrollBar
	 */
	private void addHorizontalAutoScrollListener(){
		final FigureCanvas canvas = getFigureCanvas();
		PropertyChangeListener horizontalChangeAutoRightListener = new PropertyChangeListener() {
			public void propertyChange(PropertyChangeEvent event) {
				RangeModel model = canvas.getViewport().getHorizontalRangeModel();		
				ScrollBar sb = canvas.getHorizontalBar();
				if(event.getPropertyName().equalsIgnoreCase("maximum")){
					if((Integer)event.getNewValue() > (Integer)event.getOldValue()){
						//Scroll to most right
						canvas.scrollToX(model.getMaximum()-model.getExtent());
					}
				}else if(event.getPropertyName().equalsIgnoreCase("minimum")){
					if((Integer)event.getNewValue() < (Integer)event.getOldValue() ){
						//Scroll to most left
						canvas.scrollToX((Integer)event.getNewValue());
					}
				}
			}
		};

		canvas.getViewport().getHorizontalRangeModel().addPropertyChangeListener(horizontalChangeAutoRightListener);
	}

		IContextButtonPadData data = super.getContextButtonPad(context);
		final FigureCanvas canvas = (FigureCanvas)editor.getGraphicalViewer().getControl();
		Rectangle canvasBounds = canvas.getViewport().getBounds();
		final int hOffset = canvas.getViewport().getHorizontalRangeModel().getValue();
		final int vOffset = canvas.getViewport().getVerticalRangeModel().getValue();
		final int canvasRight = canvasBounds.width + hOffset;
		final int canvasBottom = canvasBounds.height + vOffset;
		final int canvasTop = vOffset;
		IRectangle padBounds = data.getPadLocation();
		final int padRight = padBounds.getX() + padBounds.getWidth() + 30;
		final int padTop = padBounds.getY() - 30;
		final int padBottom = padBounds.getY() + padBounds.getHeight() + 30;
		
		if (padRight>canvasRight || padTop<canvasTop || padBottom>canvasBottom) {
			Job job = new Job("scroll") {
				@Override
				protected IStatus run (IProgressMonitor monitor) {
					Display.getDefault().asyncExec(new Runnable() {
						@Override
						public void run() {
							if (padRight>canvasRight)
								canvas.scrollToX(hOffset + padRight - canvasRight);
							if (padTop<canvasTop)
								canvas.scrollToY(vOffset + padTop - canvasTop);
							if (padBottom>canvasBottom)
								canvas.scrollToY(vOffset + padBottom - canvasBottom);
						}
					});
					return Status.OK_STATUS;
				}			 		
			};	
			job.schedule(600);
		}

		GraphicalViewer viewer = getGraphicalViewer();
		viewer.setContents(diagram);
		EditPart ep = viewer.getRootEditPart().getContents();
		if (ep instanceof AbstractGraphicalEditPart) {
			IFigure fig = ((AbstractGraphicalEditPart)ep).getFigure();
			fig.setBorder(new MarginBorder(50));
		}