public SpeedPanel(final ApplicationEngine applicationEngine, final MessageSource messageSource) {
this.applicationEngine = applicationEngine;
speedSelector = createSpeedSelector();
setupLayout(messageSource);
applicationEngine.addListener(this, ApplicationEngineEvent.SPEED);
setMaximumSize(getPreferredSize());
}
/** Convert non-linear mapping : engine to selector. */
@Override
public void propertyHasChanged() {
speedSelector.setValue((int) Math.sqrt(applicationEngine.getSimulationSpeed()));
}
/** Convert non-linear mapping : selector to engine. */
private void updateEngineSpeed() {
applicationEngine.setSimulationSpeed((short) Math.pow(speedSelector.getValue(), 2));
}