| /****************************************************************************** |
| * 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 Pentagon Figure |
| */ |
| public class GeoShapePentagonFigure extends GeoShapePolygonFigure { |
| |
| private final static double WIDTH_FACTOR = 2 * Math.sin(0.4 * Math.PI) / (1 + Math.cos(0.2 * Math.PI)); |
| private final static double BOTTOM_OFFSET_FACTOR = 1 / (4 * Math.cos(0.2 * Math.PI)); |
| private final static double SIDE_OFFSET_FACTOR = (1 - Math.cos(0.4 * Math.PI)) / (1 + Math.cos(0.2 * Math.PI)); |
| |
| /** |
| * Constructor - Creates a pentagon with a given Default size |
| * |
| * @param width inital 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 GeoShapePentagonFigure( int width, int height, int spacing ) { |
| super(width, height, spacing); |
| } |
| |
| /** |
| * Constructor - Creates a proper pentagon with a given height |
| * |
| * @param height initial height of the figure |
| * @param spacing <code>int</code> that is the margin between children in logical units |
| */ |
| public GeoShapePentagonFigure(int height, int spacing) { |
| this((int) Math.round(WIDTH_FACTOR * height), height, 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) { |
| |
| PointList points = new PrecisionPointList(); |
| |
| Point p1 = new PrecisionPoint(rect.preciseX() + rect.preciseWidth() / 2, rect.preciseY()); |
| Point p2 = new PrecisionPoint(rect.preciseX() + rect.preciseWidth() - 1, rect.preciseY() + rect.preciseHeight() * SIDE_OFFSET_FACTOR); |
| Point p3 = new PrecisionPoint(rect.preciseX() + rect.preciseWidth() * (0.5 + BOTTOM_OFFSET_FACTOR), rect.preciseY() + rect.preciseHeight() - 1); |
| Point p4 = new PrecisionPoint(rect.preciseX() + rect.preciseWidth() * (0.5 - BOTTOM_OFFSET_FACTOR), p3.preciseY()); |
| Point p5 = new PrecisionPoint(rect.preciseX(), p2.preciseY()); |
| |
| points.addPoint( p1 ); |
| points.addPoint( p2 ); |
| points.addPoint( p3 ); |
| points.addPoint( p4 ); |
| points.addPoint( p5 ); |
| points.addPoint( p1 ); |
| |
| return points; |
| } |
| |
| } |