| /****************************************************************************** |
| * Copyright (c) 2003, 2008 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.geometry.Point; |
| import org.eclipse.draw2d.geometry.PointList; |
| import org.eclipse.draw2d.geometry.PrecisionPoint; |
| import org.eclipse.draw2d.geometry.Rectangle; |
| import org.eclipse.gmf.runtime.draw2d.ui.geometry.PrecisionPointList; |
| |
| /** |
| * @author jschofie |
| * @author aboyko |
| * |
| * This Figure represents a Octagon Figure |
| */ |
| public class GeoShapeOctagonFigure extends GeoShapePolygonFigure { |
| |
| private static double factor = 1.0 / (2.0 + Math.sqrt(2.0)); |
| |
| /** |
| * Constructor - Creates a octagon 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 GeoShapeOctagonFigure( int width, int height, int spacing ) { |
| super(width, height, spacing); |
| } |
| |
| /** |
| * Constructor - Creates a proper octagon with a given Default height |
| * |
| * @param height initial height of the figure |
| * @param spacing <code>int</code> that is the margin between children in logical units |
| */ |
| public GeoShapeOctagonFigure(int size, int spacing) { |
| super(size, size, spacing); |
| } |
| |
| |
| /** |
| * This method is used to compute the shapes polygon points. |
| * This is currently based on the shapes bounding box. |
| * |
| * @param rect the rectangle that the shape will fit in |
| */ |
| protected PointList calculatePoints(Rectangle rect) { |
| |
| double xOffset = rect.preciseWidth() * factor; |
| double yOffset = rect.preciseHeight() * factor; |
| |
| PointList points = new PrecisionPointList(); |
| |
| Point p1 = new PrecisionPoint(rect.preciseX(), rect.preciseY() + yOffset); |
| Point p2 = new PrecisionPoint(rect.preciseX() + xOffset, rect.preciseY()); |
| Point p3 = new PrecisionPoint(rect.preciseX() + rect.preciseWidth() - xOffset, rect.preciseY()); |
| Point p4 = new PrecisionPoint(rect.preciseX() + rect.preciseWidth() - 1, rect.preciseY() + yOffset); |
| Point p5 = new PrecisionPoint(p4.preciseX(), rect.preciseY() + rect.preciseHeight() - yOffset); |
| Point p6 = new PrecisionPoint(p3.preciseX(), rect.preciseY() + rect.preciseHeight() - 1); |
| Point p7 = new PrecisionPoint(p2.preciseX(), p6.preciseY()); |
| Point p8 = new PrecisionPoint(rect.preciseX(), p5.preciseY()); |
| |
| points.addPoint( p1 ); |
| points.addPoint( p2 ); |
| points.addPoint( p3 ); |
| points.addPoint( p4 ); |
| points.addPoint( p5 ); |
| points.addPoint( p6 ); |
| points.addPoint( p7 ); |
| points.addPoint( p8 ); |
| points.addPoint( p1 ); |
| |
| return points; |
| } |
| } |