/*
* JBoss, Home of Professional Open Source
* Copyright 2005, JBoss Inc., and individual contributors as indicated
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jbpm.gd.common.command;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.commands.Command;
import org.jbpm.gd.common.notation.BendPoint;
import org.jbpm.gd.common.notation.Edge;
import org.jbpm.gd.common.notation.Node;
public abstract class AbstractEdgeCreateCommand extends Command {
protected Node source;
protected Node target;
protected Edge edge;
public void execute() {
if (source == target && edge.getBendPoints().isEmpty()) {
addBendPoints();
}
}
private void addBendPoints() {
Rectangle constraint = source.getConstraint();
int horizontal = - (constraint.width / 2 + 25);
int vertical = horizontal * constraint.height / constraint.width;
BendPoint first = new BendPoint();
first.setRelativeDimensions(new Dimension(horizontal, 0), new Dimension(horizontal, 0));
BendPoint second = new BendPoint();
second.setRelativeDimensions(new Dimension(horizontal, vertical), new Dimension(horizontal, vertical));
edge.addBendPoint(first);
edge.addBendPoint(second);
}
public boolean canExecute() {
if (source == null || target == null) {
return false;
} else {
return true;
}
}
public void setSource(Node newSource) {
source = newSource;
}
public void setEdge(Edge newEdge) {
edge = newEdge;
}
public void setTarget(Node newTarget) {
target = newTarget;
}
}