www.pudn.com > Caliph_v0.9.13+Emirv0.8.5-src.zip > SemanticRelationRepresentation.java
/*
* This file is part of Caliph & Emir.
*
* Caliph & Emir 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 2 of the License, or
* (at your option) any later version.
*
* Caliph & Emir is 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 Caliph & Emir; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Copyright statement:
* --------------------
* (c) 2002-2004 by Mathias Lux (mathias@juggle.at) and the Know-Center Graz
* Inffeldgasse 21a, 8010 Graz, Austria
* http://www.know-center.at
*/
package at.know.center.wv_wr.imb.objectcatalog.semanticscreator;
import at.know.center.wv_wr.imb.objectcatalog.graphics.Arrow;
import java.awt.*;
import java.awt.geom.Line2D;
import java.awt.geom.Rectangle2D;
import java.awt.geom.RoundRectangle2D;
import java.util.Iterator;
import java.util.Vector;
/**
* This file is part of Caliph & Emir.
*
* @author Mathias Lux, mathias@juggle.at
*/
public class SemanticRelationRepresentation {
private SemanticObjectRepresentation source, target;
private String label;
private Line2D line;
private boolean highlighted;
private RoundRectangle2D.Double labelBackGround = null;
public static final Color COLOR_ARROW_HIGHLIGHT = Color.red;
public static final Color COLOR_ARROW = new Color(36, 74, 200);
public SemanticRelationRepresentation(SemanticObjectRepresentation source, SemanticObjectRepresentation target, String label) {
this.source = source;
this.target = target;
this.label = label;
line = new Line2D.Double();
highlighted = false;
}
public String getLabel() {
return label;
}
public void setLabel(String label) {
this.label = label;
}
public SemanticObjectRepresentation getTarget() {
return target;
}
public void setTarget(SemanticObjectRepresentation target) {
this.target = target;
}
public SemanticObjectRepresentation getSource() {
return source;
}
public void setSource(SemanticObjectRepresentation source) {
this.source = source;
}
public void drawRelation(Graphics2D g2) {
Vector sPoints = new Vector();
Vector tPoints = new Vector();
Point sourcePoint, targetPoint;
Point sp = source.getP();
Point tp = target.getP();
sourcePoint = null;
targetPoint = null;
sPoints.add(new Point(sp.x + 2 * source.WIDTH / 3, sp.y));
sPoints.add(new Point(sp.x + source.WIDTH / 3, sp.y));
sPoints.add(new Point(sp.x + 2 * source.WIDTH / 3, sp.y + source.HEIGHT));
sPoints.add(new Point(sp.x + source.WIDTH / 3, sp.y + source.HEIGHT));
sPoints.add(new Point(sp.x, sp.y + 2 * source.HEIGHT / 3));
sPoints.add(new Point(sp.x, sp.y + source.HEIGHT / 3));
sPoints.add(new Point(sp.x + source.WIDTH, sp.y + 2 * source.HEIGHT / 3));
sPoints.add(new Point(sp.x + source.WIDTH, sp.y + source.HEIGHT / 3));
sPoints.add(new Point(sp.x, sp.y));
sPoints.add(new Point(sp.x, sp.y + SemanticObjectRepresentation.HEIGHT));
sPoints.add(new Point(sp.x + SemanticObjectRepresentation.WIDTH, sp.y));
sPoints.add(new Point(sp.x + SemanticObjectRepresentation.WIDTH, sp.y + SemanticObjectRepresentation.HEIGHT));
tPoints.add(new Point(tp.x + 2 * SemanticObjectRepresentation.WIDTH / 3, tp.y));
tPoints.add(new Point(tp.x + SemanticObjectRepresentation.WIDTH / 3, tp.y));
tPoints.add(new Point(tp.x + 2 * SemanticObjectRepresentation.WIDTH / 3, tp.y + SemanticObjectRepresentation.HEIGHT));
tPoints.add(new Point(tp.x + SemanticObjectRepresentation.WIDTH / 3, tp.y + SemanticObjectRepresentation.HEIGHT));
tPoints.add(new Point(tp.x, tp.y + 2 * SemanticObjectRepresentation.HEIGHT / 3));
tPoints.add(new Point(tp.x, tp.y + SemanticObjectRepresentation.HEIGHT / 3));
tPoints.add(new Point(tp.x + SemanticObjectRepresentation.WIDTH, tp.y + 2 * SemanticObjectRepresentation.HEIGHT / 3));
tPoints.add(new Point(tp.x + SemanticObjectRepresentation.WIDTH, tp.y + SemanticObjectRepresentation.HEIGHT / 3));
tPoints.add(new Point(tp.x, tp.y));
tPoints.add(new Point(tp.x, tp.y + SemanticObjectRepresentation.HEIGHT));
tPoints.add(new Point(tp.x + SemanticObjectRepresentation.WIDTH, tp.y));
tPoints.add(new Point(tp.x + SemanticObjectRepresentation.WIDTH, tp.y + SemanticObjectRepresentation.HEIGHT));
double minDistance = -1.0;
for (Iterator i1 = sPoints.iterator(); i1.hasNext();) {
Point point = (Point) i1.next();
for (Iterator it2 = tPoints.iterator(); it2.hasNext();) {
Point pt = (Point) it2.next();
if (minDistance > pt.distance(point) || minDistance < 0) {
minDistance = pt.distance(point);
sourcePoint = point;
targetPoint = pt;
}
}
}
if (highlighted)
g2.setColor(COLOR_ARROW_HIGHLIGHT);
else
g2.setColor(COLOR_ARROW);
g2.fill(new Arrow(new Line2D.Double((double) sourcePoint.x, (double) sourcePoint.y, (double) targetPoint.x, (double) targetPoint.y), 3.0));
g2.drawLine(sourcePoint.x, sourcePoint.y, targetPoint.x, targetPoint.y);
line.setLine((double) sourcePoint.x, (double) sourcePoint.y, (double) targetPoint.x, (double) targetPoint.y);
g2.fillOval(sourcePoint.x - 3, sourcePoint.y - 3, 6, 6);
// Arrowheads
Composite comp = g2.getComposite();
float alpha = 0.75f;
int type = AlphaComposite.SRC_OVER;
AlphaComposite composite = AlphaComposite.getInstance(type, alpha);
g2.setComposite(composite);
g2.setColor(Color.white);
Rectangle2D bounds = g2.getFontMetrics().getStringBounds(label, g2);
int fillRectX = ((sourcePoint.x + targetPoint.x) >> 1) - (((int) bounds.getWidth()) >> 1) - 4;
int fillRectY = ((sourcePoint.y + targetPoint.y) >> 1) - ((int) bounds.getHeight()+1);
int fillRectWidth = (int) bounds.getWidth() + 8;
int fillRectHeight = (int) bounds.getHeight() + 8;
labelBackGround = new RoundRectangle2D.Double(fillRectX, fillRectY, fillRectWidth, fillRectHeight, 12.0, 12.0);
g2.fill(labelBackGround);
// g2.fillRect(fillRectX, fillRectY, fillRectWidth, fillRectHeight);
g2.setComposite(comp);
g2.setColor(Color.black);
int x = ((sourcePoint.x + targetPoint.x) >> 1) - (g2.getFontMetrics().stringWidth(label) >> 1);
g2.drawString(label, x, (sourcePoint.y + targetPoint.y) >> 1);
}
public boolean contains(Point p) {
Arrow t = new Arrow(line, 3.0);
boolean b = t.contains(p);
if (labelBackGround != null && labelBackGround.contains(p)) {
b = true;
}
if (b) {
highlighted = true;
} else {
highlighted = false;
}
return highlighted;
}
}