net.sourceforge.plantuml.svek.CircleAndArrow Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of plantuml Show documentation
Show all versions of plantuml Show documentation
PlantUML is a component that allows to quickly write :
* sequence diagram,
* use case diagram,
* class diagram,
* activity diagram,
* component diagram,
* state diagram
* object diagram
/* ========================================================================
* PlantUML : a free UML diagram generator
* ========================================================================
*
* (C) Copyright 2009-2013, Arnaud Roques
*
* Project Info: http://plantuml.sourceforge.net
*
* This file is part of PlantUML.
*
* PlantUML is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* PlantUML 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 General Public
* License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*
* [Java is a trademark or registered trademark of Sun Microsystems, Inc.
* in the United States and other countries.]
*
* Original Author: Arnaud Roques
*
* Revision $Revision: 4236 $
*
*/
package net.sourceforge.plantuml.svek;
import java.awt.geom.AffineTransform;
import java.awt.geom.Point2D;
import net.sourceforge.plantuml.graphic.UDrawable;
import net.sourceforge.plantuml.ugraphic.UEllipse;
import net.sourceforge.plantuml.ugraphic.UGraphic;
import net.sourceforge.plantuml.ugraphic.ULine;
import net.sourceforge.plantuml.ugraphic.UShape;
import net.sourceforge.plantuml.ugraphic.UTranslate;
class CircleAndArrow implements UDrawable {
private final AffineTransform at;
private final AffineTransform at2;
private int radius;
private final Point2D center;
private final Point2D p1;
private final Point2D p2;
private Point2D p3;
private Point2D p4;
public CircleAndArrow(Point2D p1, Point2D p2) {
this.center = new Point2D.Double((p1.getX() + p2.getX()) / 2, (p1.getY() + p2.getY()) / 2);
at = AffineTransform.getTranslateInstance(-center.getX(), -center.getY());
at2 = AffineTransform.getTranslateInstance(center.getX(), center.getY());
radius = (int) (p1.distance(p2) / 2);
if (radius % 2 == 0) {
radius--;
}
this.p1 = putOnCircle(p1);
this.p2 = putOnCircle(p2);
this.p3 = at.transform(this.p1, null);
this.p3 = new Point2D.Double(p3.getY(), -p3.getX());
this.p3 = at2.transform(p3, null);
this.p4 = at.transform(this.p2, null);
this.p4 = new Point2D.Double(p4.getY(), -p4.getX());
this.p4 = at2.transform(p4, null);
}
private Point2D putOnCircle(Point2D p) {
p = at.transform(p, null);
final double coef = p.distance(new Point2D.Double()) / radius;
p = new Point2D.Double(p.getX() / coef, p.getY() / coef);
return at2.transform(p, null);
}
public void drawU(UGraphic ug) {
final UShape circle = new UEllipse(radius * 2, radius * 2);
ug.apply(new UTranslate(center.getX() - radius, center.getY() - radius)).draw(circle);
// drawLine(ug, x, y, p1, p2);
// drawLine(ug, x, y, p3, p4);
}
static private void drawLine(UGraphic ug, double x, double y, Point2D p1, Point2D p2) {
final double dx = p2.getX() - p1.getX();
final double dy = p2.getY() - p1.getY();
ug.apply(new UTranslate(x + p1.getX(), y + p1.getY())).draw(new ULine(dx, dy));
}
}