/*
* Copyright (c) 2016 Vivid Solutions.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* and Eclipse Distribution License v. 1.0 which accompanies this distribution.
* The Eclipse Public License is available at http://www.eclipse.org/legal/epl-v10.html
* and the Eclipse Distribution License is available at
*
* http://www.eclipse.org/org/documents/edl-v10.php.
*/
package org.locationtech.jtstest.testbuilder.ui.style;
import java.awt.*;
import java.awt.geom.*;
import org.locationtech.jtstest.testbuilder.ui.Viewport;
public class MidArrowLineStyle
extends SegmentStyle
{
private final static double HEAD_ANGLE = 30;
private final static double HEAD_LENGTH = 10;
private Color color = Color.RED;
public MidArrowLineStyle(Color color) {
this.color = color;
}
protected void paint(int index, Point2D p0, Point2D p1, int lineType, Viewport vp, Graphics2D gr)
throws Exception
{
paintMidpointArrow(p0, p1, vp, gr);
}
protected void paintMidpointArrow(Point2D p0, Point2D p1, Viewport viewport,
Graphics2D graphics) throws NoninvertibleTransformException
{
// can't compute valid arrow for zero-length segments
if (p0.equals(p1)) {
return;
}
graphics.setColor(color);
// graphics.setStroke(1.0);
Point2D mid = new Point2D.Float((float) ((p0.getX() + p1.getX()) / 2),
(float) ((p0.getY() + p1.getY()) / 2));
GeneralPath arrowhead = ArrowEndpointStyle.arrowheadPath(p0, p1, mid,
HEAD_LENGTH, HEAD_ANGLE);
graphics.draw(arrowhead);
}
}