import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.*;

/**
 * @author Andreas Spirka, Sven Eisenhauer
 * Dialog zum Ändern und Löschen von Benutzern
 */
public class ChgUserDlg extends AbstractMyJDlg implements ListSelectionListener
{
	Container c;
	JPanel contentPane;
	BorderLayout borderLayout1 = new BorderLayout();
	int counter = 0;
	
	UserCon users = new UserCon();    // Objekt-Container und TableModel
	JScrollPane scrollPane = new JScrollPane();  // Scroll-Pane
	JTable table = new JTable();       // Tabelle
	
	JPanel jPanelSouth = new JPanel();
	JLabel jLabelSelection = new JLabel();
	JTextField jTextFieldAuswahl = new JTextField();
	String fName = new String ("user.dat");
	JButton delB = new JButton("Löschen");
	JButton saveB = new JButton("Speichern");
	JButton abbrB = new JButton("Abbrechen");
	JComboBox comboBox = new JComboBox(User.sRole);
	JTextField tf = new JTextField();
	DefaultCellEditor cellEd = new DefaultCellEditor(tf);
	DefaultCellEditor comboEd = new DefaultCellEditor(comboBox);
	
	ChgUserDlg() {
		ButtonListener2 bl = new ButtonListener2(this);
		c = getContentPane();
		setModal(true);
		c.setLayout(borderLayout1);
		setSize(new Dimension(600, 300));
		setTitle("Benutzer ändern / löschen");
		jPanelSouth.setBorder(BorderFactory.createEtchedBorder());
		jLabelSelection.setText("Auswahl");
		jTextFieldAuswahl.setText("kein Benutzer ausgewählt");
		
		
		c.add( scrollPane, java.awt.BorderLayout.CENTER );
		scrollPane.setVerticalScrollBarPolicy( JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED );
		scrollPane.getViewport().add( table );  // Table in Scroll-Pane
		c.add(jPanelSouth, java.awt.BorderLayout.SOUTH);
		jPanelSouth.add(delB);
		jPanelSouth.add(saveB);
		jPanelSouth.add(abbrB);
		delB.addActionListener(bl);
		abbrB.addActionListener(bl);
		saveB.addActionListener(bl);
		saveB.setActionCommand("Speichern");
		delB.setActionCommand("Löschen");
		abbrB.setActionCommand("Abbrechen");
		
		try {
			FileInputStream fis = new FileInputStream(fName);
			ObjectInputStream ois = new ObjectInputStream(fis);
			users = (UserCon) ois.readObject();
			ois.close();
			fis.close();
		} catch (Exception exception) { exception.printStackTrace(); }
		table.setModel( users );   // Model für Tabelle setzen
		// Einzelauswahl
		table.setSelectionMode( ListSelectionModel.SINGLE_SELECTION );
		ListSelectionModel lsm = table.getSelectionModel();
		lsm.addListSelectionListener( this );   // TableModelListener regitrieren
		table.setCellSelectionEnabled(true);
		TableColumn loginColumn = table.getColumnModel().getColumn(0);
		TableColumn pwColumn = table.getColumnModel().getColumn(1);
		TableColumn fullNamColumn = table.getColumnModel().getColumn(2);
		TableColumn uidColumn = table.getColumnModel().getColumn(3);
		TableColumn roleColumn = table.getColumnModel().getColumn(4);
		loginColumn.setCellEditor(cellEd);
		pwColumn.setCellEditor(cellEd);
		fullNamColumn.setCellEditor(cellEd);
		uidColumn.setCellEditor(cellEd);
		roleColumn.setCellEditor(comboEd);
		Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
		Dimension frameSize = getSize();
		setLocation((screenSize.width/2)-(frameSize.width/2),(screenSize.height/2)-(frameSize.height/2));
		setVisible(true);
	}
	
	/* (non-Javadoc)
	 * @see AbstractMyJDlg#buttonActionPerformed(java.awt.event.ActionEvent)
	 */
	public void buttonActionPerformed(ActionEvent e) {
		if (e.getActionCommand().equals("Abbrechen"))
		{
			setVisible(false);
		}
		else if(e.getActionCommand().equals("Löschen"))
		{
			table.removeEditor();
			users.removeUser((User) users.elementAt(table.getSelectedRow()));
			try {
				FileOutputStream fos = new FileOutputStream(fName);
				ObjectOutputStream oos = new ObjectOutputStream(fos);
				oos.writeObject(users);
				oos.close();
				fos.close();
			} catch (Exception exception) { exception.printStackTrace(); }
		}
		else if(e.getActionCommand().equals("Speichern"))
		{
			if (table.isEditing()) {
				table.getCellEditor().stopCellEditing();
			}
			table.removeEditor();
			table.clearSelection();
			try {
				FileOutputStream fos = new FileOutputStream(fName);
				ObjectOutputStream oos = new ObjectOutputStream(fos);
				oos.writeObject(users);
				oos.close();
				fos.close();
			} catch (Exception exception) { exception.printStackTrace(); }
		}
	}
	/* (non-Javadoc)
	 * @see javax.swing.event.ListSelectionListener#valueChanged(javax.swing.event.ListSelectionEvent)
	 */
	public void valueChanged( ListSelectionEvent e )
	{
		/* in der Hörsaalübung kam es hier zum Crash, wenn eine Zeile
		 * ausgewählt war und eine neue hinzugefügt wurde. In diesem
		 * Fall ist die erste und zuletzt ausgewählte Zeile identisch.
		 * Das wir hier abgefangen.
		 */
		/*if ( e.getFirstIndex() == e.getLastIndex() ) {
		 jTextFieldAuswahl.setText( "kein Benutzer ausgewählt");
		 return;
		 }
		 String login = (String) table.getValueAt(table.getSelectedRow(), 0);
		 String nam = (String) table.getValueAt(table.getSelectedRow(), 2);
		 this.jTextFieldAuswahl.setText( login + " (" + nam + ")" );*/
	}
}