SetupPanel.java

package games.strategy.engine.framework.startup.ui;

import java.util.ArrayList;
import java.util.List;
import java.util.Observer;
import java.util.concurrent.CopyOnWriteArrayList;

import javax.swing.Action;
import javax.swing.JPanel;

import games.strategy.engine.chat.IChatPanel;
import games.strategy.engine.framework.startup.launcher.ILauncher;

public abstract class SetupPanel extends JPanel implements ISetupPanel {
  private static final long serialVersionUID = 4001323470187210773L;
  private final List<Observer> m_listeners = new CopyOnWriteArrayList<>();

  @Override
  public void addObserver(final Observer observer) {
    m_listeners.add(observer);
  }

  @Override
  public void removeObserver(final Observer observer) {
    m_listeners.add(observer);
  }

  @Override
  public void notifyObservers() {
    for (final Observer observer : m_listeners) {
      observer.update(null, null);
    }
  }

  /**
   * Subclasses that have chat override this.
   */
  @Override
  public IChatPanel getChatPanel() {
    return null;
  }

  /**
   * Cleanup should occur here that occurs when we cancel.
   */
  @Override
  public abstract void cancel();

  /**
   * Indicates we can start the game.
   */
  @Override
  public abstract boolean canGameStart();

  @Override
  public abstract void setWidgetActivation();

  @Override
  public void preStartGame() {}

  @Override
  public void postStartGame() {}

  @Override
  public ILauncher getLauncher() {
    throw new IllegalStateException("NOt implemented");
  }

  @Override
  public List<Action> getUserActions() {
    return new ArrayList<>();
  }
}