package org.hwo.ui;

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.FlowLayout;

import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JDialog;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;

import java.awt.GridBagLayout;

import javax.swing.JLabel;

import java.awt.GridBagConstraints;

import javax.swing.JList;

import java.awt.Insets;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Dialog.ModalExclusionType;
import java.awt.Dialog.ModalityType;

public class JObjectSelector<E> extends JDialog {

	public static <T> T execute(T[] items){
		return execute(items,null,null);
	}
	public static <T> T execute(T[] items,Component parent){
		return execute(items,parent,null,null);
	}

	public static <T extends Object> T execute(T[] items,String title,String text){
		return execute(items,null,title,text);
	}
	public static <T extends Object> T execute(T[] items,Component parent,String title,String text){
		JObjectSelector<T> os = new JObjectSelector<T>();
		os.setItems(items);
		if (title != null)
			os.setTitle(title);
		if (text != null)
			os.setText(text);
		
		if (parent != null){
			os.setLocationRelativeTo(parent);
		}
		
		os.setVisible(true);
		os.dispose();
		return os.selectedItem;
	}
	
	
	private final JPanel contentPanel = new JPanel();
	private JList lItems;
	
	private E[] items;
	private E selectedItem;
	private JLabel lText;

	/**
	 * Create the dialog.
	 */
	public JObjectSelector() {
		setModalityType(ModalityType.APPLICATION_MODAL);
		setModalExclusionType(ModalExclusionType.APPLICATION_EXCLUDE);
		setTitle("Auswahl\u2026");
		setBounds(100, 100, 450, 300);
		getContentPane().setLayout(new BorderLayout());
		contentPanel.setBorder(new EmptyBorder(5, 5, 5, 5));
		getContentPane().add(contentPanel, BorderLayout.CENTER);
		GridBagLayout gbl_contentPanel = new GridBagLayout();
		gbl_contentPanel.columnWidths = new int[]{0, 0};
		gbl_contentPanel.rowHeights = new int[]{0, 0, 0};
		gbl_contentPanel.columnWeights = new double[]{1.0, Double.MIN_VALUE};
		gbl_contentPanel.rowWeights = new double[]{0.0, 1.0, Double.MIN_VALUE};
		contentPanel.setLayout(gbl_contentPanel);
		{
			lText = new JLabel("-");
			GridBagConstraints gbc_lText = new GridBagConstraints();
			gbc_lText.insets = new Insets(0, 0, 5, 0);
			gbc_lText.gridx = 0;
			gbc_lText.gridy = 0;
			contentPanel.add(lText, gbc_lText);
		}
		{
			lItems = new JList();
			GridBagConstraints gbc_lItems = new GridBagConstraints();
			gbc_lItems.fill = GridBagConstraints.BOTH;
			gbc_lItems.gridx = 0;
			gbc_lItems.gridy = 1;
			contentPanel.add(lItems, gbc_lItems);
		}
		{
			JPanel buttonPane = new JPanel();
			buttonPane.setLayout(new FlowLayout(FlowLayout.RIGHT));
			getContentPane().add(buttonPane, BorderLayout.SOUTH);
			{
				JButton okButton = new JButton("OK");
				okButton.addActionListener(new ActionListener() {
					public void actionPerformed(ActionEvent arg0) {
						accept();
					}
				});
				okButton.setActionCommand("OK");
				buttonPane.add(okButton);
				getRootPane().setDefaultButton(okButton);
			}
			{
				JButton cancelButton = new JButton("Cancel");
				cancelButton.addActionListener(new ActionListener() {
					public void actionPerformed(ActionEvent e) {
						cancel();
					}
				});
				cancelButton.setActionCommand("Cancel");
				buttonPane.add(cancelButton);
			}
		}
	}

	public void accept()
	{
		selectedItem = (E)lItems.getSelectedValue();
		setVisible(false);
	}
	
	public void cancel(){
		setVisible(false);
	}
	
	public void setItems(E[] items) {
		this.items = items;
		DefaultListModel dlm = new DefaultListModel();
		for (E o:items){
			dlm.addElement(o);
		}
		lItems.setModel(dlm);
	}
	public E[] getItems() {
		return items;
	}
	
	public void setText(String text){
		this.lText.setText(text);
	}
	public String getText(){
		return this.lText.getText();
	}
	
}