centerButton.setSelectionFactory(new AlignmentSelectedFactory(G2DResource.URIs.Alignment_Center));
centerButton.addSelectionListener(new AlignmentSelectionListener(context, G2DResource.URIs.Alignment_Center));
Button trailButton = new Button(alignComposite, support, SWT.TOGGLE);
centerButton.setSelectionFactory(new AlignmentSelectedFactory(G2DResource.URIs.Alignment_Center));
centerButton.addSelectionListener(new AlignmentSelectionListener(context, G2DResource.URIs.Alignment_Center));
Button trailButton = new Button(alignComposite, support, SWT.TOGGLE);