solidellipsefigure.java

来自「一个简单的UNCODE 码生成程序」· Java 代码 · 共 45 行

/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.examples.paint;


import org.eclipse.swt.graphics.*;

/**
 * 2D Solid Ellipse object
 */
public class SolidEllipseFigure extends Figure {
	private Color color;
	private int x1, y1, x2, y2;
	/**
	 * Constructs a SolidEllipse
	 * These objects are defined by any two diametrically opposing corners of a box
	 * bounding the ellipse.
	 * 
	 * @param color the color 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 SolidEllipseFigure(Color color, int x1, int y1, int x2, int y2) {
		this.color = color; 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.setBackground(color);
		fdc.gc.fillOval(r.x, r.y, r.width, r.height);
	}
	public void addDamagedRegion(FigureDrawContext fdc, Region region) {
		region.add(fdc.toClientRectangle(x1, y1, x2, y2));
	}
}