/*
* @(#)ElbowConnection.java 5.1
*
*/
package CH.ifa.draw.figures;
import java.awt.Point;
import java.awt.Rectangle;
import java.util.Vector;
import CH.ifa.draw.framework.Figure;
import CH.ifa.draw.framework.Handle;
import CH.ifa.draw.framework.Locator;
import CH.ifa.draw.standard.ChangeConnectionEndHandle;
import CH.ifa.draw.standard.ChangeConnectionStartHandle;
import CH.ifa.draw.standard.NullHandle;
import CH.ifa.draw.util.Geom;
/**
* A LineConnection that constrains a connection to
* orthogonal lines.
*/
public class ElbowConnection extends LineConnection {
/*
* Serialization support.
*/
private static final long serialVersionUID = 2193968743082078559L;
private int elbowConnectionSerializedDataVersion = 1;
public ElbowConnection() {
super();
}
public void updateConnection() {
super.updateConnection();
updatePoints();
}
public void layoutConnection() {
}
/**
* Gets the handles of the figure.
*/
public Vector<Handle> handles() {
Vector<Handle> handles = new Vector<Handle>(fPoints.size()*2);
handles.addElement(new ChangeConnectionStartHandle(this));
for (int i = 1; i < fPoints.size()-1; i++)
handles.addElement(new NullHandle(this, locator(i)));
handles.addElement(new ChangeConnectionEndHandle(this));
for (int i = 0; i < fPoints.size()-1; i++)
handles.addElement(new ElbowHandle(this, i));
return handles;
}
public Locator connectedTextLocator(Figure f) {
return new ElbowTextLocator();
}
protected void updatePoints() {
willChange();
Point start = startPoint();
Point end = endPoint();
fPoints.removeAllElements();
fPoints.addElement(start);
if (start.x == end.x || start.y == end.y) {
fPoints.addElement(end);
}
else {
Rectangle r1 = start().owner().displayBox();
Rectangle r2 = end().owner().displayBox();
int x1, y1, x2, y2;
int dir = Geom.direction(r1.x + r1.width/2, r1.y + r1.height/2,
r2.x + r2.width/2, r2.y + r2.height/2);
if (dir == Geom.NORTH || dir == Geom.SOUTH) {
fPoints.addElement(new Point(start.x, (start.y + end.y)/2));
fPoints.addElement(new Point(end.x, (start.y + end.y)/2));
}
else {
fPoints.addElement(new Point((start.x + end.x)/2, start.y));
fPoints.addElement(new Point((start.x + end.x)/2, end.y));
}
fPoints.addElement(end);
}
changed();
}
}