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/* ========================================================================
* PlantUML : a free UML diagram generator
* ========================================================================
*
* (C) Copyright 2009-2017, Arnaud Roques
*
* Project Info: http://plantuml.com
*
* If you like this project or if you find it useful, you can support us at:
*
* http://plantuml.com/patreon (only 1$ per month!)
* http://plantuml.com/paypal
*
* 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.
*
*
* Original Author: Arnaud Roques
*
*
*/
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));
}
}
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