markerAction.setImageDescriptor(AbstractUIPlugin.imageDescriptorFromPlugin("es.iiia.sgi",
"icons/bullet_blue.png"));
modifyVerticesAction = new ModifyVerticesAction(page);
modifyVerticesAction.setImageDescriptor(AbstractUIPlugin.imageDescriptorFromPlugin("es.iiia.sgi",
"icons/modify_vertices.png"));
modifyLayoutAction = new ModifyLayoutAction(page);
modifyLayoutAction.setImageDescriptor(AbstractUIPlugin.imageDescriptorFromPlugin("es.iiia.sgi",
"icons/modify_layout.png"));
chooseColorAction = new ChooseColorAction(page);
chooseColorAction.setImageDescriptor(AbstractUIPlugin.imageDescriptorFromPlugin("es.iiia.sgi",
"icons/color_wheel.png"));