Ptidej-v5.2-master/PADL Serialiser DB4O Tests/rsc/JHotDraw v5.1/src/CH/ifa/draw/standard/LocatorConnector.java
/*
 * @(#)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();
	}

}

