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/* *******************************************************************
 * Copyright (c) 1999-2001 Xerox Corporation,
 *               2002 Palo Alto Research Center, Incorporated (PARC).
 * All rights reserved.
 * This program and the accompanying materials are made available
 * under the terms of the Eclipse Public License v 2.0
 * which accompanies this distribution and is available at
 * https://www.eclipse.org/org/documents/epl-2.0/EPL-2.0.txt
 *
 * Contributors:
 *     Xerox/PARC     initial implementation
 * ******************************************************************/


package org.aspectj.ajde.ui;

import java.util.EventListener;

/**
 * View renderers get notified of structure view update events and should
 * update the display of the structure view accordingly.
 *
 * @author Mik Kersten
 */
public interface StructureViewRenderer extends EventListener {

	/**
	 * Implementors should updated the display of the corresponding
	 * file structure view.
	 */
	void updateView(StructureView structureView);

    /**
     * Highlights and selects the given node as active.  What "active"
     * means depends on the renderer: a typical activation should cause
     * the corresponding node's sourceline to be highlighted in the
     * active editor.
     */
	void setActiveNode(IStructureViewNode node);

    /**
     * Same behavior as setActiveNode(StructureViewNode) but
     * highlights a particular line within the span of the node.
     *
     * @param	lineOffset	number of lines after the begin and before the
     * 						end line of the corresponding StructureNode.
     */
	void setActiveNode(IStructureViewNode activeNode, int lineOffset);
}