Developing a DSL Graphical Notation - Eclipse Modeling Project: A Domain-Specific Language Toolkit - page 95

sourceAnchor = new SourceFixedConnectionAnchor(getNodeFigure());

}
return sourceAnchor;

}

public class SourceFixedConnectionAnchor
extends AbstractConnectionAnchor {

public SourceFixedConnectionAnchor(IFigure owner) {
super (owner);

}

public Point getLocation(Point reference) {
Point right = getOwner().getBounds().getRight();
Point p = new PrecisionPoint(right.x + 1, right.y - 1);
getOwner().translateToAbsolute(p);
return p;

}

}

The overridden getLocation() method provides the main functionality. To
install on our EditPart , we override getSourceConnectionAnchor() , and in
our Topic2EditPart , we override getSourceConnectionAnchor() as well.

private ConnectionAnchor targetAnchor;
private ConnectionAnchor sourceAnchor;

@Override
public ConnectionAnchor getTargetConnectionAnchor(
ConnectionEditPart connEditPart) {
if (targetAnchor == null ) {
targetAnchor = new TargetFixedConnectionAnchor(getNodeFigure());

}
return targetAnchor;

}

@Override
public ConnectionAnchor getSourceConnectionAnchor(
ConnectionEditPart connEditPart) {
if (sourceAnchor == null ) {
sourceAnchor = new
SourceFixedConnectionAnchor(getNodeFigure());

}
return sourceAnchor;

}

public class SourceFixedConnectionAnchor extends
AbstractConnectionAnchor {

public SourceFixedConnectionAnchor(IFigure owner) {
super (owner);

}