private void createPersistentPanel()
{
HorizontalPanel hp = new HorizontalPanel();
hp.setSpacing(10);
final SaveSystemDialog saveSystemDialog = new SaveSystemDialog(this);
Button saveSystem = new Button("Save equation system");
saveSystem.addSelectionListener(new SelectionListener<ButtonEvent>()
{
@Override
public void componentSelected(ButtonEvent ce)
{
saveSystemDialog.showDialog();
}
});
hp.add(saveSystem);
final SystemWidget systemWidget = new SystemWidget(InputPanel.this);