/*
Copyright 2008-2010 Gephi
Authors : Jeremy Subtil <jeremy.subtil@gephi.org>
Website : http://www.gephi.org
This file is part of Gephi.
Gephi is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
Gephi 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with Gephi. If not, see <http://www.gnu.org/licenses/>.
*/
package org.gephi.preview;
import org.gephi.preview.api.Color;
import org.gephi.preview.api.EdgeChildColorizerClient;
import org.gephi.preview.api.Point;
import org.gephi.preview.updaters.LabelShortenerClient;
import org.gephi.preview.util.HolderImpl;
import org.gephi.preview.util.Vector;
/**
* Generic implementation of an edge label.
*
* @author Jérémy Subtil <jeremy.subtil@gephi.org>
*/
public abstract class AbstractEdgeLabel implements LabelShortenerClient, EdgeChildColorizerClient {
protected final String originalValue;
private final HolderImpl<Color> colorHolder = new HolderImpl<Color>();
protected String value;
protected PointImpl position;
/**
* Constructor.
*
* @param value the value of the edge label
*/
public AbstractEdgeLabel(String value) {
originalValue = value;
}
/**
* Returns the edge label's position.
*
* @return the edge label's position
*/
public Point getPosition() {
return position;
}
/**
* Returns the edge label's original value.
*
* @return the edge label's original value
*/
public String getOriginalValue() {
return originalValue;
}
/**
* Returns the edge label's current value.
*
* @return the edge label's current value
*/
public String getValue() {
return value;
}
/**
* Returns the edge label's color.
*
* @return the edge label's color
*/
public Color getColor() {
return colorHolder.getComponent();
}
public void setValue(String value) {
this.value = value;
}
public boolean isEmpty() {
return value != null ? value.isEmpty() : true;
}
public void setColor(Color color) {
colorHolder.setComponent(color);
}
public void revertOriginalValue() {
setValue(originalValue);
}
/**
* Sets the edge label's position above its parent edge's one.
*/
protected void putPositionAboveEdge(Vector edgeDirection, float edgeThickness) {
// normal vector for vertical align
Vector n = new Vector(edgeDirection.y, -edgeDirection.x);
// the mini-label mustn't be on the edge but over/under it
n.mult(edgeThickness / 2);
Vector positionVector = new Vector(position);
positionVector.add(n);
position = new PointImpl(positionVector);
}
}