package contrib;

import java.util.Arrays;
import java.util.List;

import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;

/**
 * @author Phill Perryman
 * 
 * Allows the user to choose from a list of elements
 * 
 */
public class Chooser {
	
	private Elementx[] choose;
	private String attributeName = "id";
	
	/**
	 * Construct a new Chooser based on a list of Elements
	 */
	public Chooser(List list) {
		choose = new Elementx[list.size()];
		for (int i = 0; i < list.size(); i++) {
			choose[i]= (Elementx) list.get(i);
		}
		Arrays.sort(choose);
	}
	
	/**
	 * Construct a new Chooser based on a list of child Elements
	 * of the element
	 */
	public Chooser(Elementx e) {
		List list = e.getChildren();
		choose = new Elementx[list.size()];
		for (int i = 0; i < list.size(); i++) {
			choose[i]= (Elementx) list.get(i);
		}
		Arrays.sort(choose);
	}
	
	/**
	 * The messagebox function displays a drop down list of the
	 * elements as renderend by toString and allows the user
	 * to choose one
	 * 
	 * @param The frame to display in
	 * @param Title of the dialog box
	 * @param Messsage text
	 * @return the selected Elementx or null if the dialog
	 * is cancelled
	 * 
	 */
	public Elementx messagebox(JFrame frame, String titleId, String msgId) {
	JPanel panel = new JPanel();
			JLabel label = new JLabel(msgId);
			panel.add(label);
			JComboBox desc =
				new JComboBox(choose);
			panel.add(desc);

			if (JOptionPane
				.showConfirmDialog(
					frame,
					panel,
					titleId,
					JOptionPane.OK_CANCEL_OPTION)
				!= JOptionPane.OK_OPTION) {
				return null;
			};

			return (Elementx) desc.getSelectedItem();	
	}

}