package org.simantics.modeling.ui.diagram.monitor;

import org.simantics.browsing.ui.swt.widgets.impl.ModifyComboListenerImpl;
import org.simantics.db.Resource;
import org.simantics.db.WriteGraph;
import org.simantics.db.exception.DatabaseException;
import org.simantics.diagram.stubs.DiagramResource;

public class FormatModifier extends ModifyComboListenerImpl<Resource, Resource> {

	@Override
	public void applySelection(WriteGraph graph, Resource monitor, Resource newFormatter) throws DatabaseException {
		graph.markUndoPoint();
		DiagramResource DIA = DiagramResource.getInstance(graph);
		Resource exist = graph.getPossibleObject(monitor, DIA.HasFormatter);
		if (newFormatter.equals(exist))
			return;
		graph.deny(monitor, DIA.HasFormatter);
		graph.claim(monitor, DIA.HasFormatter, newFormatter);
	}

}