IViewportTrackingStrategy.java

/**
 * Copyright 2004-2016 Riccardo Solmi. All rights reserved.
 * This file is part of the Whole Platform.
 *
 * The Whole Platform is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The Whole Platform is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the Whole Platform. If not, see <http://www.gnu.org/licenses/>.
 */
package org.whole.lang.ui.figures;

import org.eclipse.draw2d.Graphics;

/**
 * @author Riccardo Solmi
 */
public interface IViewportTrackingStrategy {
	public static IViewportTrackingStrategy IDENTITY = new IViewportTrackingStrategy() {
		public int getIndent() {
			return 0;
		}
		public void setIndent(int indent) {
		}
		public int getAscent() {
			return 0;
		}
		public void setAscent(int ascent) {
		}

		public void onInvalidate() {
		}
		public void onPaintChildren(Graphics graphics) {
		}		
	};

	public int getIndent();
	public void setIndent(int indent);
	public int getAscent();
	public void setAscent(int ascent);

	void onInvalidate();
	void onPaintChildren(Graphics graphics);
}