/* $Id: ClassdiagramAssociationEdge.java 17863 2010-01-12 20:07:22Z linus $
*****************************************************************************
* Copyright (c) 2009 Contributors - see below
* 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:
* tfmorris
*****************************************************************************
*
* Some portions of this file was previously release using the BSD License:
*/
// Copyright (c) 1996-2007 The Regents of the University of California. All
// Rights Reserved. Permission to use, copy, modify, and distribute this
// software and its documentation without fee, and without a written
// agreement is hereby granted, provided that the above copyright notice
// and this paragraph appear in all copies. This software program and
// documentation are copyrighted by The Regents of the University of
// California. The software program and documentation are supplied "AS
// IS", without any accompanying services from The Regents. The Regents
// does not warrant that the operation of the program will be
// uninterrupted or error-free. The end-user understands that the program
// was developed for research purposes and is advised not to rely
// exclusively on the program for any reason. IN NO EVENT SHALL THE
// UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT,
// SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS,
// ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
// THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
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package org.argouml.uml.diagram.static_structure.layout;
import java.awt.Point;
import org.tigris.gef.presentation.FigEdge;
import org.tigris.gef.presentation.FigNode;
import org.tigris.gef.presentation.FigPoly;
/**
*
* @author mkl
*/
public class ClassdiagramAssociationEdge extends ClassdiagramEdge {
/**
* The constructor.
*
* @param edge the fig of the edge
*/
public ClassdiagramAssociationEdge(FigEdge edge) {
super(edge);
}
/**
* Size of self association edges.
*/
private static final int SELF_SIZE = 30;
/*
* @see org.argouml.uml.diagram.layout.LayoutedEdge#layout()
*/
public void layout() {
// TODO: Multiple associations between the same pair of elements
// need to be special cased so that they don't overlap - tfm - 20060228
// self associations are special cases. No need to let the maze
// runner find the way.
if (getDestFigNode() == getSourceFigNode()) {
Point centerRight = getCenterRight((FigNode) getSourceFigNode());
int yoffset = getSourceFigNode().getHeight() / 2;
yoffset = java.lang.Math.min(SELF_SIZE, yoffset);
FigPoly fig = getUnderlyingFig();
fig.addPoint(centerRight);
// move more right
fig.addPoint(centerRight.x + SELF_SIZE, centerRight.y);
// move down
fig.addPoint(centerRight.x + SELF_SIZE, centerRight.y + yoffset);
// move left
fig.addPoint(centerRight.x, centerRight.y + yoffset);
fig.setFilled(false);
fig.setSelfLoop(true);
getCurrentEdge().setFig(fig);
}
/* else {
// brute force rectangular layout
Point centerSource = sourceFigNode.center();
Point centerDest = destFigNode.center();
underlyingFig.addPoint(centerSource.x, centerSource.y);
underlyingFig.addPoint(centerSource.x +
(centerDest.x-centerSource.x)/2,
centerSource.y);
underlyingFig.addPoint(centerSource.x +
(centerDest.x-centerSource.x)/2,
centerDest.y);
underlyingFig.addPoint(centerDest.x, centerDest.y);
underlyingFig.setFilled(false);
underlyingFig.setSelfLoop(false);
currentEdge.setFig(underlyingFig);
}*/
}
/**
* Return a point which is centered vertically on the right hand edge of the
* figure.
*
* @param fig
* The fig.
* @return A Point.
*/
private Point getCenterRight(FigNode fig) {
Point center = fig.getCenter();
return new Point(center.x + fig.getWidth() / 2, center.y);
}
}