/**
* Registers an {@link Adjustable} for participation in synchronized scrolling.
*
* @param adjustable the adjustable
*/
public void participateInSynchronizedScrolling(Adjustable adjustable) {
if (adjustable == null) return;
if (synchronizedAdjustables.contains(adjustable)) return;
synchronizedAdjustables.add(adjustable);
setParticipatingInSynchronizedScrolling(adjustable, true);
adjustable.addAdjustmentListener(this);
}
/**
* Wires a {@link JCheckBox} to the adjustment synchronizer, in such a way that:
*
* <ol>
* <li>state changes in the checkbox control whether the adjustable participates in synchronized
* adjustment
* <li>state changes in this {@link AdjustmentSynchronizer} are reflected in the {@link
* JCheckBox}
* </ol>
*
* @param view the checkbox to control whether an adjustable participates in synchronized
* adjustment
* @param adjustable the adjustable
* @throws IllegalArgumentException if view is null
* @throws IllegalArgumentException if adjustable is null
*/
public void adapt(final JCheckBox view, final Adjustable adjustable) {
CheckParameterUtil.ensureParameterNotNull(adjustable, "adjustable");
CheckParameterUtil.ensureParameterNotNull(view, "view");
if (!synchronizedAdjustables.contains(adjustable)) {
participateInSynchronizedScrolling(adjustable);
}
// register an item lister with the check box
//
view.addItemListener(
new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
switch (e.getStateChange()) {
case ItemEvent.SELECTED:
if (!isParticipatingInSynchronizedScrolling(adjustable)) {
setParticipatingInSynchronizedScrolling(adjustable, true);
}
break;
case ItemEvent.DESELECTED:
if (isParticipatingInSynchronizedScrolling(adjustable)) {
setParticipatingInSynchronizedScrolling(adjustable, false);
}
break;
}
}
});
observable.addObserver(
new Observer() {
@Override
public void update(Observable o, Object arg) {
boolean sync = isParticipatingInSynchronizedScrolling(adjustable);
if (view.isSelected() != sync) {
view.setSelected(sync);
}
}
});
setParticipatingInSynchronizedScrolling(adjustable, true);
view.setSelected(true);
}