path: root/dozentenmodul/src/main/java/org/openslx/dozmod/gui/window/layout/LoginWindowLayout.java

package org.openslx.dozmod.gui.window.layout;

import java.awt.Color;
import java.awt.Component;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;

import javax.swing.BoxLayout;
import javax.swing.ButtonGroup;
import javax.swing.DefaultListCellRenderer;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JPasswordField;
import javax.swing.JRadioButton;
import javax.swing.JTextField;
import javax.swing.UIManager;
import javax.swing.border.TitledBorder;

import org.apache.log4j.Logger;
import org.openslx.bwlp.thrift.iface.Organization;
import org.openslx.dozmod.gui.Gui;
import org.openslx.dozmod.util.ResourceLoader;

public abstract class LoginWindowLayout extends JDialog {

	private static final Logger LOGGER = Logger.getLogger(LoginWindowLayout.class);

	// TODO This has nothing to to with the layout
	protected static enum LOGIN_TYPE {
		ECP(0),
		TEST_ACCOUNT(1),
		DIRECT_CONNECT(2);

		public final int id;

		private LOGIN_TYPE(final int id) {
			this.id = id;
		}
	}

	// authentication method to use for login attempts
	protected LOGIN_TYPE loginType = null;


	private static final String TITLE = "bwSuite - Login";
	private static final String AUTH_TYPE_LABEL = "Authentifizierungsart";
	private static final String LOGIN_FORM_LABEL = "Zugangsdaten";

	// login type panel
	protected JPanel loginTypePanel;
	protected ButtonGroup loginTypeButtonGroup;
	protected JRadioButton[] loginTypes = new JRadioButton[3];

	
	// login form panel
	protected JLabel idpLabel;
	protected JComboBox<Organization> idpCombo;
	protected JTextField usernameField;
	protected JPasswordField passwordField;
	protected JCheckBox saveUsernameCheck;
	protected JButton loginButton;




	/**
	 * Create a new login composite
	 * 
	 * @param mainShell
	 *            The shell it should be added to
	 */
	@SuppressWarnings("serial")
	public LoginWindowLayout() {
		super();
    	setTitle(TITLE);
    	setLocationRelativeTo(null);
    	setResizable(false);
    	setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);
    	GridBagLayout bag = new GridBagLayout();
    	GridBagConstraints con = new GridBagConstraints();
    	setLayout(bag);
    	con.fill = GridBagConstraints.BOTH;
    	con.gridwidth = GridBagConstraints.REMAINDER;
    	con.weightx = 1;
    	con.weighty = 1;
    	JLabel pic = new JLabel(getScaledLogo());
    	bag.setConstraints(pic, con);
    	add(pic);

    	loginTypePanel = new JPanel();
    	loginTypePanel.setLayout(new BoxLayout(loginTypePanel, BoxLayout.PAGE_AXIS));
		loginTypePanel.setBorder(new TitledBorder(UIManager
				.getBorder("TitledBorder.border"), AUTH_TYPE_LABEL,
				TitledBorder.LEADING, TitledBorder.TOP, null, Color.WHITE));
    	loginTypeButtonGroup = new ButtonGroup() {
    		
    	};

    	loginTypes[0] = new JRadioButton("Authentifizierung über bwIDM");
    	loginTypes[1] = new JRadioButton("Test-Zugang mit festem Benutzer");
    	loginTypes[2] = new JRadioButton("Direkter Zugang zum Satelliten");
    	for (int i = 0; i < loginTypes.length; i++) {
    		loginTypeButtonGroup.add(loginTypes[i]);
    		loginTypePanel.add(loginTypes[i]);
    	}

    	con.gridwidth = 1;
    	bag.setConstraints(loginTypePanel, con);
		add(loginTypePanel);

		// login form panel
		JPanel loginFormPanel = new JPanel();
		GridBagLayout formBag = new GridBagLayout();
		GridBagConstraints formCon = new GridBagConstraints();
		formCon.fill = GridBagConstraints.BOTH;
		formCon.gridwidth = 1;
		loginFormPanel.setLayout(new BoxLayout(loginFormPanel, BoxLayout.PAGE_AXIS));
		loginFormPanel.setBorder(new TitledBorder(UIManager
				.getBorder("TitledBorder.border"), LOGIN_FORM_LABEL,
				TitledBorder.LEADING, TitledBorder.TOP, null, new Color(255, 255, 255)));
		idpLabel = new JLabel("Identity Provider:");
		formBag.setConstraints(idpLabel, formCon);
		loginFormPanel.add(idpLabel);
		idpCombo = new JComboBox<Organization>();
		idpCombo.setRenderer(new DefaultListCellRenderer() {
			@Override
			public Component getListCellRendererComponent(JList<?> list,
					Object value, int index, boolean isSelected,
					boolean cellHasFocus) {
				super.getListCellRendererComponent(list, value, index,
						isSelected, cellHasFocus);
				setText("Initialisiere...");
				return this;
			}
		});
		formCon.gridwidth = GridBagConstraints.REMAINDER;
		formBag.setConstraints(idpCombo, formCon);
		loginFormPanel.add(idpCombo);

		// label + field for username
		JLabel labelUsername = new JLabel("Benutzername:");
		usernameField = new JTextField();
		usernameField.setToolTipText("Bitte geben Sie Ihren Benutzernamen ein.");
		usernameField.setColumns(10);
		formCon.gridwidth = 1;
		formBag.setConstraints(labelUsername, formCon);
		formCon.gridwidth = GridBagConstraints.REMAINDER;
		formBag.setConstraints(usernameField, formCon);
		loginFormPanel.add(labelUsername);
		loginFormPanel.add(usernameField);
		loginFormPanel.setLayout(formBag);

		// label + field for password
		JLabel labelPassword = new JLabel("Passwort:");
		passwordField = new JPasswordField();
		passwordField.setToolTipText("Bitte geben Sie Ihren Passwort ein.");
		passwordField.setColumns(10);
		formCon.gridwidth = 1;
		formBag.setConstraints(labelPassword, formCon);
		loginFormPanel.add(labelPassword);
		formCon.gridwidth = GridBagConstraints.REMAINDER;
		formBag.setConstraints(passwordField, formCon);
		loginFormPanel.add(passwordField);
		loginButton = new JButton("Login");
		formCon.gridwidth = 1;
		formCon.gridx = 1;
		formBag.setConstraints(loginButton, formCon);
		loginFormPanel.add(loginButton);
		saveUsernameCheck = new JCheckBox("Benutzername speichern");
		formCon.gridwidth = 1;
		formCon.gridx = 2;
		formBag.setConstraints(saveUsernameCheck, formCon);
		loginFormPanel.add(saveUsernameCheck);

		// finally add the form itself to the main panel
		con.gridwidth = GridBagConstraints.REMAINDER;
		bag.setConstraints(loginFormPanel, con);
		add(loginFormPanel);
		pack();
	}

	/**
	 * @return ImageIcon of the standard bwLehrpool logo scaled to the login window size
	 */
	private ImageIcon getScaledLogo() {
		try {
			ImageIcon image = ResourceLoader.getIcon("/img/Logo_bwLehrpool.png");
			java.awt.Rectangle screenSize = Gui.getMonitorFromRectangle(getBounds(), true).getDefaultConfiguration().getBounds();
			float scaleX = (float)screenSize.width / (float)image.getIconWidth();
			float scaleY = (float)screenSize.height / (float)image.getIconHeight();
			final float scaling;
			if (scaleX < scaleY) {
				scaling = scaleX / 2;
			} else {
				scaling = scaleY / 2;
			}
			image = new ImageIcon(image.getImage().getScaledInstance((int)(image.getIconWidth() * scaling), (int)(image.getIconHeight()* scaling), 0));
			return image;
		} catch (Exception e) {
			LOGGER.warn("Cannot load image", e);
		}
		return null;
	}
}