/*
* @(#)LocatorConnector.java 5.1
*
*/
package CH.ifa.draw.standard;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Point;
import java.awt.Rectangle;
import java.io.IOException;
import CH.ifa.draw.framework.ConnectionFigure;
import CH.ifa.draw.framework.Figure;
import CH.ifa.draw.framework.Locator;
import CH.ifa.draw.util.StorableInput;
import CH.ifa.draw.util.StorableOutput;
/**
* A LocatorConnector locates connection points with
* the help of a Locator. It supports the definition
* of connection points to semantic locations.
* @see Locator
* @see Connector
*/
public class LocatorConnector extends AbstractConnector {
/**
* The standard size of the connector. The display box
* is centered around the located point.
*/
public static final int SIZE = 8;
private Locator fLocator;
/*
* Serialization support.
*/
private static final long serialVersionUID = 5062833203337604181L;
private int locatorConnectorSerializedDataVersion = 1;
public LocatorConnector() { // only used for Storable
fLocator = null;
}
public LocatorConnector(Figure owner, Locator l) {
super(owner);
fLocator = l;
}
protected Point locate(ConnectionFigure connection) {
return fLocator.locate(owner());
}
/**
* Tests if a point is contained in the connector.
*/
public boolean containsPoint(int x, int y) {
return displayBox().contains(x, y);
}
/**
* Gets the display box of the connector.
*/
public Rectangle displayBox() {
Point p = fLocator.locate(owner());
return new Rectangle(
p.x - SIZE / 2,
p.y - SIZE / 2,
SIZE,
SIZE);
}
/**
* Draws this connector.
*/
public void draw(Graphics g) {
Rectangle r = displayBox();
g.setColor(Color.blue);
g.fillOval(r.x, r.y, r.width, r.height);
g.setColor(Color.black);
g.drawOval(r.x, r.y, r.width, r.height);
}
/**
* Stores the arrow tip to a StorableOutput.
*/
public void write(StorableOutput dw) {
super.write(dw);
dw.writeStorable(fLocator);
}
/**
* Reads the arrow tip from a StorableInput.
*/
public void read(StorableInput dr) throws IOException {
super.read(dr);
fLocator = (Locator)dr.readStorable();
}
}