// Configuration
@Override
protected void registerCommandHandlers() {
registerCommandHandler(new RecalculateScrollBarsCommandHandler(this));
registerCommandHandler(new ScrollSelectionCommandHandler(this));
registerCommandHandler(new ShowCellInViewportCommandHandler(this));
registerCommandHandler(new ShowColumnInViewportCommandHandler(this));
registerCommandHandler(new ShowRowInViewportCommandHandler(this));
registerCommandHandler(new ViewportSelectColumnCommandHandler(this));
registerCommandHandler(new ViewportSelectRowCommandHandler(this));