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93 lines
3.0 KiB
Java
93 lines
3.0 KiB
Java
/* ========================================================================
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* PlantUML : a free UML diagram generator
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* ========================================================================
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*
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* (C) Copyright 2009-2023, Arnaud Roques
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*
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* Project Info: http://plantuml.com
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*
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* If you like this project or if you find it useful, you can support us at:
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*
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* http://plantuml.com/patreon (only 1$ per month!)
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* http://plantuml.com/paypal
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*
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* This file is part of PlantUML.
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*
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* PlantUML is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* PlantUML distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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* License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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* USA.
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*
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*
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* Original Author: Arnaud Roques
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*
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*
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*/
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package net.sourceforge.plantuml.svek;
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import java.awt.geom.AffineTransform;
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import net.sourceforge.plantuml.awt.geom.XPoint2D;
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import net.sourceforge.plantuml.graphic.UDrawable;
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import net.sourceforge.plantuml.ugraphic.UEllipse;
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import net.sourceforge.plantuml.ugraphic.UGraphic;
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import net.sourceforge.plantuml.ugraphic.UShape;
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import net.sourceforge.plantuml.ugraphic.UTranslate;
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class CircleAndArrow implements UDrawable {
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private final AffineTransform at;
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private final AffineTransform at2;
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private int radius;
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private final XPoint2D center;
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private final XPoint2D p1;
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private final XPoint2D p2;
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private XPoint2D p3;
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private XPoint2D p4;
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public CircleAndArrow(XPoint2D p1, XPoint2D p2) {
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this.center = new XPoint2D((p1.getX() + p2.getX()) / 2, (p1.getY() + p2.getY()) / 2);
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at = AffineTransform.getTranslateInstance(-center.getX(), -center.getY());
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at2 = AffineTransform.getTranslateInstance(center.getX(), center.getY());
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radius = (int) (p1.distance(p2) / 2);
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if (radius % 2 == 0) {
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radius--;
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}
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this.p1 = putOnCircle(p1);
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this.p2 = putOnCircle(p2);
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this.p3 = this.p1.transform(at);
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this.p3 = new XPoint2D(p3.getY(), -p3.getX());
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this.p3 = this.p3.transform(at2);
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this.p4 = this.p2.transform(at);
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this.p4 = new XPoint2D(p4.getY(), -p4.getX());
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this.p4 = this.p4.transform(at2);
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}
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private XPoint2D putOnCircle(XPoint2D p) {
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p = p.transform(at);
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final double coef = p.distance(new XPoint2D()) / radius;
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p = new XPoint2D(p.getX() / coef, p.getY() / coef);
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return p.transform(at2);
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}
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public void drawU(UGraphic ug) {
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final UShape circle = new UEllipse(radius * 2, radius * 2);
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ug.apply(new UTranslate(center.getX() - radius, center.getY() - radius)).draw(circle);
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// drawLine(ug, x, y, p1, p2);
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// drawLine(ug, x, y, p3, p4);
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}
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}
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