org.eclipse.gmf.runtime.diagram.ui.geoshapes/src/org/eclipse/gmf/runtime/diagram/ui/geoshapes/internal/draw2d/figures/GeoShapeEllipseFigure.java

/******************************************************************************
 * Copyright (c) 2003, 2009 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.gmf.runtime.diagram.ui.geoshapes.internal.draw2d.figures;

import org.eclipse.draw2d.ConnectionAnchor;
import org.eclipse.draw2d.Graphics;
import org.eclipse.draw2d.geometry.PrecisionPoint;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gmf.runtime.draw2d.ui.figures.IOvalAnchorableFigure;
import org.eclipse.gmf.runtime.gef.ui.figures.SlidableOvalAnchor;
import org.eclipse.swt.graphics.Path;

/**
 * This Figure represents a Ellipse Figure
 * 
 * @author jschofie
 */
public class GeoShapeEllipseFigure extends GeoShapeFigure implements
		IOvalAnchorableFigure {

	/**
	 * Constructor - Creates a ellipse with a given Default size
	 * 
	 * @param width
	 *            initial width of the figure
	 * @param height
	 *            initial height of the figure
	 * @param spacing
	 *            <code>int</code> that is the margin between children in
	 *            logical units
	 */
	public GeoShapeEllipseFigure(int width, int height, int spacing) {
		super(width, height, spacing);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.draw2d.Figure#paintFigure(org.eclipse.draw2d.Graphics)
	 */
	protected void paintFigure(Graphics g) {

		Rectangle r = getOvalBounds().getCopy();
		r.shrink(getLineWidth() / 2, getLineWidth() / 2);
		
		g.pushState();
		// don't apply transparency to the outline
		applyTransparency(g);
		if (!isUsingGradient()) {
			// fill the ellipse with the fill color
			g.fillOval(r);			
		} else {
			// gradient		
			fillGradient(g);			
		}
		g.popState();
		
		// Set the line type and line width for the outline
		g.setLineStyle(getLineStyle());
		g.setLineWidth(getLineWidth());		
		
		// Draw the ellipse outline
		g.drawOval(r);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gmf.runtime.gef.ui.internal.figures.IOvalAnchorableFigure#getOvalBounds()
	 */
	public Rectangle getOvalBounds() {
		Rectangle r = getBounds();

		Rectangle ovalRect = new Rectangle(r);

		// not using the full bounds of the rectangle to draw
		// the oval in as it results in the top and the left
		// edge of the oval being chopped off.  That is why 
		// we are indenting by 1
		ovalRect.setSize(r.width-1, r.height-1);
		
		return ovalRect;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gmf.runtime.gef.ui.figures.NodeFigure#createAnchor(org.eclipse.draw2d.geometry.PrecisionPoint)
	 */
	protected ConnectionAnchor createAnchor(PrecisionPoint p) {
		if (p == null)
			return createDefaultAnchor();
		return new SlidableOvalAnchor(this, p);
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.gmf.runtime.gef.ui.figures.NodeFigure#createDefaultAnchor()
	 */
	protected ConnectionAnchor createDefaultAnchor() {
		return new SlidableOvalAnchor(this);
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.gmf.runtime.gef.ui.figures.NodeFigure#getPath()
	 * @since 1.2
	 */
	protected Path getPath() {
		Path path = new Path(null);	
		Rectangle r = getOvalBounds().getCopy();
		r.shrink(getLineWidth() / 2, getLineWidth() / 2);
		path.addArc(r.x, r.y, r.width, r.height, 0, 360);
		return path;
	}
}