net.sourceforge.plantuml.svek.extremity.ExtremityLineCrowfoot Maven / Gradle / Ivy

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/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
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 * This file is part of PlantUML.
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 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
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 *
 * PlantUML distributed in the hope that it will be useful, but
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 * 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,
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 * Original Author:  Arnaud Roques
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 */
package net.sourceforge.plantuml.svek.extremity;

import java.awt.geom.AffineTransform;

import net.sourceforge.plantuml.klimt.UTranslate;
import net.sourceforge.plantuml.klimt.drawing.UGraphic;
import net.sourceforge.plantuml.klimt.geom.XPoint2D;
import net.sourceforge.plantuml.klimt.shape.ULine;

class ExtremityLineCrowfoot extends Extremity {

	private final XPoint2D contact;
	private final double angle;
	private final double lineHeight = 4;

	@Override
	public XPoint2D somePoint() {
		return contact;
	}

	public ExtremityLineCrowfoot(XPoint2D p1, double angle) {
		this.contact = new XPoint2D(p1.getX(), p1.getY());
		this.angle = manageround(angle + Math.PI / 2);
	}

	public void drawU(UGraphic ug) {

		final int xWing = 8;
		final int yAperture = 6;
		final AffineTransform rotate = AffineTransform.getRotateInstance(this.angle);
		XPoint2D middle = new XPoint2D(0, 0);
		XPoint2D left = new XPoint2D(0, -yAperture);
		XPoint2D base = new XPoint2D(-xWing, 0);
		XPoint2D lineTop = new XPoint2D(-xWing - 2, -lineHeight);
		XPoint2D lineBottom = new XPoint2D(-xWing - 2, lineHeight);
		XPoint2D right = new XPoint2D(0, yAperture);

		left = left.transform(rotate);
		base = base.transform(rotate);
		right = right.transform(rotate);
		lineTop = lineTop.transform(rotate);
		lineBottom = lineBottom.transform(rotate);

		drawLine(ug, contact.getX(), contact.getY(), base, left);
		drawLine(ug, contact.getX(), contact.getY(), base, right);
		drawLine(ug, contact.getX(), contact.getY(), base, middle);
		drawLine(ug, contact.getX(), contact.getY(), lineTop, lineBottom);
	}

	static private void drawLine(UGraphic ug, double x, double y, XPoint2D p1, XPoint2D 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));
	}

}