public DisableZoomWindow(final IViewer viewer) {
   super("Disable zoom window");
   setToolTipText("Hold down the SHIFT key to zoom in on a region of the plot.");
   setImageDescriptor(
       ImageRegistryUtil.getSharedImages().getImageDescriptor(ISharedImages.IMG_ZOOM_OBJECT));
   _viewer = viewer;
 }
 public LoadPolygonRegionsModel(final Control parent, final PolygonRegionsModel model) {
   setImageDescriptor(
       ImageRegistryUtil.getSharedImages().getImageDescriptor(ISharedImages.IMG_RELOAD));
   _parent = parent;
   _model = model;
 }
 public DisableCommunication(final IABavoCrossplot crossplot) {
   setImageDescriptor(
       ImageRegistryUtil.getSharedImages().getImageDescriptor(ISharedImages.IMG_BROADCAST));
   setToolTipText("Communication is disabled");
   _crossplot = crossplot;
 }