sclass JCalculatedComponent extends SingleComponentPanel is ChangeTriggerable {
settable IF0 makeComponent;
*(IF0 *makeComponent) {}
transient ReliableSingleThread rstMakeComponent = new(-> {
setComponent(makeComponent?!);
});
{
bindToComponent(this, -> {
/*if (!hasComponent())*/ rstMakeComponent.trigger();
}, null);
}
public void change {
rstMakeComponent.trigger();
}
void reactToChangesIn(IHasChangeListeners source) {
bindHasChangeListenersToComponent(this, source, l0 change);
}
}