/* ======================================================================== * PlantUML : a free UML diagram generator * ======================================================================== * * (C) Copyright 2009-2023, 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.timingdiagram.graphic;import java.awt.geom.Point2D;import net.sourceforge.plantuml.ISkinSimple;import net.sourceforge.plantuml.awt.geom.Dimension2D;import net.sourceforge.plantuml.cucadiagram.Display;import net.sourceforge.plantuml.cucadiagram.WithLinkType;import net.sourceforge.plantuml.graphic.FontConfiguration;import net.sourceforge.plantuml.graphic.HorizontalAlignment;import net.sourceforge.plantuml.graphic.TextBlock;import net.sourceforge.plantuml.graphic.UDrawable;import net.sourceforge.plantuml.ugraphic.UFont;import net.sourceforge.plantuml.ugraphic.UGraphic;import net.sourceforge.plantuml.ugraphic.ULine;import net.sourceforge.plantuml.ugraphic.UPolygon;import net.sourceforge.plantuml.ugraphic.UTranslate;import net.sourceforge.plantuml.ugraphic.color.HColor;public class TimeArrow implements UDrawable {	private final Point2D start;	private final Point2D end;	private final Display label;	private final ISkinSimple spriteContainer;	private final WithLinkType type;	public static TimeArrow create(IntricatedPoint pt1, IntricatedPoint pt2, Display label, ISkinSimple spriteContainer,			WithLinkType type) {		final TimeArrow arrow1 = new TimeArrow(pt1.getPointA(), pt2.getPointA(), label, spriteContainer, type);		final TimeArrow arrow2 = new TimeArrow(pt1.getPointA(), pt2.getPointB(), label, spriteContainer, type);		final TimeArrow arrow3 = new TimeArrow(pt1.getPointB(), pt2.getPointA(), label, spriteContainer, type);		final TimeArrow arrow4 = new TimeArrow(pt1.getPointB(), pt2.getPointB(), label, spriteContainer, type);		return shorter(arrow1, arrow2, arrow3, arrow4);	}	private TimeArrow(Point2D start, Point2D end, Display label, ISkinSimple spriteContainer, WithLinkType type) {		this.start = start;		this.type = type;		this.end = end;		this.label = label;		this.spriteContainer = spriteContainer;	}	private double getAngle() {		return Math.atan2(end.getX() - start.getX(), end.getY() - start.getY());	}	private static TimeArrow shorter(TimeArrow arrow1, TimeArrow arrow2) {		if (arrow1.len() < arrow2.len()) {			return arrow1;		}		return arrow2;	}	private static TimeArrow shorter(TimeArrow arrow1, TimeArrow arrow2, TimeArrow arrow3, TimeArrow arrow4) {		return shorter(shorter(arrow1, arrow2), shorter(arrow3, arrow4));	}	private double len() {		return start.distance(end);	}	public TimeArrow translate(UTranslate translate) {		return new TimeArrow(translate.getTranslated(start), translate.getTranslated(end), label, spriteContainer,				type);	}	public static Point2D onCircle(Point2D pt, double alpha) {		final double radius = 8;		final double x = pt.getX() - Math.sin(alpha) * radius;		final double y = pt.getY() - Math.cos(alpha) * radius;		return new Point2D.Double(x, y);	}	private FontConfiguration getFontConfiguration() {		final UFont font = UFont.serif(14);		final HColor color = type.getSpecificColor();		return FontConfiguration.create(font, color, color, false);	}	public void drawU(UGraphic ug) {		final double angle = getAngle();		ug = ug.apply(type.getSpecificColor()).apply(type.getUStroke());		final ULine line = new ULine(end.getX() - start.getX(), end.getY() - start.getY());		ug.apply(new UTranslate(start)).draw(line);		final double delta = 20.0 * Math.PI / 180.0;		final Point2D pt1 = onCircle(end, angle + delta);		final Point2D pt2 = onCircle(end, angle - delta);		final UPolygon polygon = new UPolygon();		polygon.addPoint(pt1.getX(), pt1.getY());		polygon.addPoint(pt2.getX(), pt2.getY());		polygon.addPoint(end.getX(), end.getY());		ug = ug.apply(type.getSpecificColor().bg());		ug.draw(polygon);		final TextBlock textLabel = label.create(getFontConfiguration(), HorizontalAlignment.LEFT, spriteContainer);		double xText = (pt1.getX() + pt2.getX()) / 2;		double yText = (pt1.getY() + pt2.getY()) / 2;		if (start.getY() < end.getY()) {			final Dimension2D dimLabel = textLabel.calculateDimension(ug.getStringBounder());			yText -= dimLabel.getHeight();		}		textLabel.drawU(ug.apply(new UTranslate(xText, yText)));	}}