source: src/main/java/genius/gui/session/MediatorPanel.java

package genius.gui.session;

import javax.swing.event.ListDataEvent;
import javax.swing.event.ListDataListener;

import genius.core.repository.PartyRepItem;
import genius.gui.panels.ComboboxSelectionPanel;
import genius.gui.panels.LabelAndComponent;
import genius.gui.panels.SingleSelectionModel;
import genius.gui.panels.TextModel;
import genius.gui.panels.TextPanel;
import genius.gui.panels.VflowPanelWithBorder;
import genius.gui.renderer.RepItemListCellRenderer;

/**
 * The mediator selector panel for single session. Visible only when the
 * strategy list is non-empty.
 */
@SuppressWarnings("serial")
public class MediatorPanel extends VflowPanelWithBorder {

        private SingleSelectionModel<PartyRepItem> partyModel;

        public MediatorPanel(TextModel nameModel, SingleSelectionModel<PartyRepItem> partyModel) {
                super("Mediator");
                this.partyModel = partyModel;
                final ComboboxSelectionPanel<PartyRepItem> mediatorcomb = new ComboboxSelectionPanel<>("Mediator Strategy",
                                partyModel);

                mediatorcomb.setCellRenderer(new RepItemListCellRenderer());

                add(new LabelAndComponent("Mediator ID", new TextPanel(nameModel)));
                add(mediatorcomb);
                updateVisibility();

                connect();
        }

        private void connect() {
                partyModel.addListDataListener(new ListDataListener() {

                        @Override
                        public void intervalRemoved(ListDataEvent e) {
                                updateVisibility();
                        }

                        @Override
                        public void intervalAdded(ListDataEvent e) {
                                updateVisibility();
                        }

                        @Override
                        public void contentsChanged(ListDataEvent e) {
                                updateVisibility();
                        }
                });
        }

        private void updateVisibility() {
                setVisible(!partyModel.getAllItems().isEmpty());
        }

}