/*
* @(#)SlantedLiner.java
*
* Copyright (c) 1996-2010 The authors and contributors of JHotDraw.
* You may not use, copy or modify this file, except in compliance with the
* accompanying license terms.
*/
package org.jhotdraw.draw.liner;
import org.jhotdraw.geom.Geom;
import org.jhotdraw.geom.BezierPath;
import org.jhotdraw.draw.handle.Handle;
import org.jhotdraw.draw.LineConnectionFigure;
import org.jhotdraw.draw.connector.Connector;
import org.jhotdraw.draw.ConnectionFigure;
import org.jhotdraw.xml.DOMInput;
import org.jhotdraw.xml.DOMOutput;
import org.jhotdraw.xml.DOMStorable;
import java.util.*;
import java.awt.geom.*;
/**
* SlantedLiner.
*
*
* @author Werner Randelshofer
* @version $Id$
*/
public class SlantedLiner
implements Liner, DOMStorable {
private double slantSize;
/** Creates a new instance. */
public SlantedLiner() {
this(20);
}
public SlantedLiner(double slantSize) {
this.slantSize = slantSize;
}
@Override
public Collection<Handle> createHandles(BezierPath path) {
return Collections.emptyList();
}
@Override
public void lineout(ConnectionFigure figure) {
BezierPath path = ((LineConnectionFigure) figure).getBezierPath();
Connector start = figure.getStartConnector();
Connector end = figure.getEndConnector();
if (start == null || end == null || path == null) {
return;
}
// Special treatment if the connection connects the same figure
if (figure.getStartFigure() == figure.getEndFigure()) {
// Ensure path has exactly four nodes
while (path.size() < 5) {
path.add(1, new BezierPath.Node(0,0));
}
while (path.size() > 5) {
path.remove(1);
}
Point2D.Double sp = start.findStart(figure);
Point2D.Double ep = end.findEnd(figure);
Rectangle2D.Double sb = start.getBounds();
Rectangle2D.Double eb = end.getBounds();
int soutcode = sb.outcode(sp);
if (soutcode == 0) {
soutcode = Geom.outcode(sb, eb);
}
int eoutcode = eb.outcode(ep);
if (eoutcode == 0) {
eoutcode = Geom.outcode(sb, eb);
}
path.get(0).moveTo(sp);
path.get(path.size() - 1).moveTo(ep);
switch (soutcode) {
case Geom.OUT_TOP : eoutcode = Geom.OUT_LEFT; break;
case Geom.OUT_RIGHT : eoutcode = Geom.OUT_TOP; break;
case Geom.OUT_BOTTOM : eoutcode = Geom.OUT_RIGHT; break;
case Geom.OUT_LEFT : eoutcode = Geom.OUT_BOTTOM; break;
default :
eoutcode = Geom.OUT_TOP;
soutcode = Geom.OUT_RIGHT;
break;
}
path.get(1).moveTo(sp.x + slantSize, sp.y);
if ((soutcode & Geom.OUT_RIGHT) != 0) {
path.get(1).moveTo(sp.x + slantSize, sp.y);
} else if ((soutcode & Geom.OUT_LEFT) != 0) {
path.get(1).moveTo(sp.x - slantSize, sp.y);
} else if ((soutcode & Geom.OUT_BOTTOM) != 0) {
path.get(1).moveTo(sp.x, sp.y + slantSize);
} else {
path.get(1).moveTo(sp.x, sp.y - slantSize);
}
if ((eoutcode & Geom.OUT_RIGHT) != 0) {
path.get(3).moveTo(ep.x + slantSize, ep.y);
} else if ((eoutcode & Geom.OUT_LEFT) != 0) {
path.get(3).moveTo(ep.x - slantSize, ep.y);
} else if ((eoutcode & Geom.OUT_BOTTOM) != 0) {
path.get(3).moveTo(ep.x, ep.y + slantSize);
} else {
path.get(3).moveTo(ep.x, ep.y - slantSize);
}
switch (soutcode) {
case Geom.OUT_RIGHT :
path.get(2).moveTo(path.get(1).x[0], path.get(3).y[0]);
break;
case Geom.OUT_TOP :
path.get(2).moveTo(path.get(1).y[0], path.get(3).x[0]);
break;
case Geom.OUT_LEFT :
path.get(2).moveTo(path.get(1).x[0], path.get(3).y[0]);
break;
case Geom.OUT_BOTTOM :
default :
path.get(2).moveTo(path.get(1).y[0], path.get(3).x[0]);
break;
}
// Regular treatment if the connection connects to two different figures
} else {
// Ensure path has exactly four nodes
while (path.size() < 4) {
path.add(1, new BezierPath.Node(0,0));
}
while (path.size() > 4) {
path.remove(1);
}
Point2D.Double sp = start.findStart(figure);
Point2D.Double ep = end.findEnd(figure);
Rectangle2D.Double sb = start.getBounds();
Rectangle2D.Double eb = end.getBounds();
int soutcode = sb.outcode(sp);
if (soutcode == 0) {
if (sp.x <= sb.x) {
soutcode = Geom.OUT_LEFT;
} else if (sp.y <= sb.y) {
soutcode = Geom.OUT_TOP;
} else if (sp.x >= sb.x + sb.width) {
soutcode = Geom.OUT_RIGHT;
} else if (sp.y >= sb.y + sb.height) {
soutcode = Geom.OUT_BOTTOM;
} else {
soutcode = Geom.outcode(sb, eb);
}
}
int eoutcode = eb.outcode(ep);
if (eoutcode == 0) {
if (ep.x <= eb.x) {
eoutcode = Geom.OUT_LEFT;
} else if (ep.y <= eb.y) {
eoutcode = Geom.OUT_TOP;
} else if (ep.x >= eb.x + eb.width) {
eoutcode = Geom.OUT_RIGHT;
} else if (ep.y >= eb.y + eb.height) {
eoutcode = Geom.OUT_BOTTOM;
} else {
eoutcode = Geom.outcode(sb, eb);
}
}
path.get(0).moveTo(sp);
path.get(path.size() - 1).moveTo(ep);
if ((soutcode & Geom.OUT_RIGHT) != 0) {
path.get(1).moveTo(sp.x + slantSize, sp.y);
} else if ((soutcode & Geom.OUT_LEFT) != 0) {
path.get(1).moveTo(sp.x - slantSize, sp.y);
} else if ((soutcode & Geom.OUT_BOTTOM) != 0) {
path.get(1).moveTo(sp.x, sp.y + slantSize);
} else {
path.get(1).moveTo(sp.x, sp.y - slantSize);
}
if ((eoutcode & Geom.OUT_RIGHT) != 0) {
path.get(2).moveTo(ep.x + slantSize, ep.y);
} else if ((eoutcode & Geom.OUT_LEFT) != 0) {
path.get(2).moveTo(ep.x - slantSize, ep.y);
} else if ((eoutcode & Geom.OUT_BOTTOM) != 0) {
path.get(2).moveTo(ep.x, ep.y + slantSize);
} else {
path.get(2).moveTo(ep.x, ep.y - slantSize);
}
}
// Ensure all path nodes are straight
for (BezierPath.Node node : path) {
node.setMask(BezierPath.C0_MASK);
}
path.invalidatePath();
}
@Override
public void read(DOMInput in) {
slantSize = in.getAttribute("slant", 20d);
}
@Override
public void write(DOMOutput out) {
out.addAttribute("slant", slantSize);
}
@Override
public Liner clone() {
try {
return (Liner) super.clone();
} catch (CloneNotSupportedException ex) {
InternalError error = new InternalError(ex.getMessage());
error.initCause(ex);
throw error;
}
}
}