/**
* <code>setRenderer</code> sets the renderer.
*
* @param renderer a <code>PairwiseSequenceRenderer</code>.
* @exception ChangeVetoException if the change is vetoed.
*/
public void setRenderer(PairwiseSequenceRenderer renderer) throws ChangeVetoException {
if (hasListeners()) {
ChangeEvent ce = new ChangeEvent(this, RENDERER, renderer, this.renderer);
ChangeSupport cs = getChangeSupport(RENDERER);
synchronized (cs) {
cs.firePreChangeEvent(ce);
if (this.renderer instanceof Changeable) {
Changeable c = (Changeable) this.renderer;
c.removeChangeListener(rendererForwarder);
}
this.renderer = renderer;
if (renderer instanceof Changeable) {
Changeable c = (Changeable) renderer;
c.addChangeListener(rendererForwarder);
}
cs.firePostChangeEvent(ce);
}
} else {
this.renderer = renderer;
}
}
protected ChangeSupport getChangeSupport(ChangeType ct) {
ChangeSupport cs = super.getChangeSupport(ct);
if (rendererForwarder == null) {
rendererForwarder = new PairwiseSequenceRenderer.PairwiseRendererForwarder(this, cs);
if (renderer instanceof Changeable) {
Changeable c = (Changeable) renderer;
c.addChangeListener(rendererForwarder, SequenceRenderContext.REPAINT);
}
}
return cs;
}