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/* ========================================================================
* PlantUML : a free UML diagram generator
* ========================================================================
*
* (C) Copyright 2009-2020, 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.cucadiagram;
import java.awt.geom.Dimension2D;
import java.awt.geom.Point2D;
import net.sourceforge.plantuml.FontParam;
import net.sourceforge.plantuml.ISkinParam;
import net.sourceforge.plantuml.graphic.FontConfiguration;
import net.sourceforge.plantuml.graphic.HorizontalAlignment;
import net.sourceforge.plantuml.graphic.HtmlColorUtils;
import net.sourceforge.plantuml.graphic.TextBlock;
import net.sourceforge.plantuml.ugraphic.UChangeColor;
import net.sourceforge.plantuml.ugraphic.UGraphic;
import net.sourceforge.plantuml.ugraphic.ULine;
import net.sourceforge.plantuml.ugraphic.UStroke;
import net.sourceforge.plantuml.ugraphic.UTranslate;
public class LinkConstraint {
private final Link link1;
private final Link link2;
private final Display display;
private double x1;
private double y1;
private double x2;
private double y2;
public LinkConstraint(Link link1, Link link2, Display display) {
this.link1 = link1;
this.link2 = link2;
this.display = display;
}
public void setPosition(Link link, Point2D pt) {
if (link == link1) {
x1 = pt.getX();
y1 = pt.getY();
} else if (link == link2) {
x2 = pt.getX();
y2 = pt.getY();
} else {
throw new IllegalArgumentException();
}
}
public void drawMe(UGraphic ug, ISkinParam skinParam) {
if (x1 == 0 && y1 == 0) {
return;
}
if (x2 == 0 && y2 == 0) {
return;
}
ug = ug.apply(new UChangeColor(HtmlColorUtils.BLACK));
// ug.apply(new UTranslate(x1, y1)).draw(new URectangle(10, 10));
// ug.apply(new UTranslate(x2, y2)).draw(new URectangle(10, 10));
final ULine line = new ULine(x2 - x1, y2 - y1);
ug = ug.apply(new UStroke(3, 3, 1));
ug.apply(new UTranslate(x1, y1)).draw(line);
final TextBlock label = display.create(new FontConfiguration(skinParam, FontParam.ARROW, null),
HorizontalAlignment.CENTER, skinParam);
final Dimension2D dimLabel = label.calculateDimension(ug.getStringBounder());
final double x = (x1 + x2) / 2 - dimLabel.getWidth() / 2;
final double y = (y1 + y2) / 2 - dimLabel.getHeight() / 2;
label.drawU(ug.apply(new UTranslate(x, y)));
}
}
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