examples/org.eclipse.swt.examples.paint/src/org/eclipse/swt/examples/paint/EllipseFigure.java

/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.examples.paint;


import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;

/**
 * 2D Ellipse object
 */
public class EllipseFigure extends Figure {
	private Color foregroundColor, backgroundColor;
	private int lineStyle, x1, y1, x2, y2;
	/**
	 * Constructs an Ellipse
	 * These objects are defined by any two diametrically opposing corners of a box
	 * bounding the ellipse.
	 * 
	 * @param color the color for this object
	 * @param lineStyle the line style for this object
	 * @param x1 the virtual X coordinate of the first corner
	 * @param y1 the virtual Y coordinate of the first corner
	 * @param x2 the virtual X coordinate of the second corner
	 * @param y2 the virtual Y coordinate of the second corner
	 */
	public EllipseFigure(Color foregroundColor, Color backgroundColor, int lineStyle, int x1, int y1, int x2, int y2) {
		this.foregroundColor = foregroundColor;
		this.backgroundColor = backgroundColor;
		this.lineStyle = lineStyle;
		this.x1 = x1; this.y1 = y1; this.x2 = x2; this.y2 = y2;
	}
	public void draw(FigureDrawContext fdc) {
		Rectangle r = fdc.toClientRectangle(x1, y1, x2, y2);
		fdc.gc.setForeground(foregroundColor);
		fdc.gc.setBackground(backgroundColor);
		fdc.gc.setLineStyle(lineStyle);
		fdc.gc.drawOval(r.x, r.y, r.width - 1, r.height - 1);
		fdc.gc.setLineStyle(SWT.LINE_SOLID);
	}
	public void addDamagedRegion(FigureDrawContext fdc, Region region) {
		region.add(fdc.toClientRectangle(x1, y1, x2, y2));
	}
}