package bin;

import java.net.*;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.*;
import javax.swing.text.html.*;



public class HelpDialog
    extends JDialog
    implements HyperlinkListener {
  JScrollPane ScrollPane = new JScrollPane();
  JEditorPane HelpPane = new JEditorPane();
  Border border1;
  JPanel Panel1 = new JPanel();
  JButton Close = new JButton();
  Border border2;

  public HelpDialog(JFrame frame) throws HeadlessException {
    super(frame, true);
    try {
      jbInit();
    }
    catch (Exception e) {
      e.printStackTrace();
    }
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    this.setLocation( (int) (screenSize.width - 420) / 2,
                     (int) (screenSize.height - 360) / 2);
    this.setResizable(false);
  }

  private void jbInit() throws Exception {
    border2 = BorderFactory.createCompoundBorder(BorderFactory.createLineBorder(Color.lightGray,1),BorderFactory.createEmptyBorder(2,10,2,10));
    this.setSize(new Dimension(420, 360));
    this.setTitle("Help");
    border1 = BorderFactory.createEmptyBorder();

    URLClassLoader urlLoader = (URLClassLoader)this.getClass().getClassLoader();
    URL url = null;
    url = urlLoader.findResource("doc/help.txt");
    HelpPane.setPage(url);
    HelpPane.setEditable(false);
  //  HelpPane.addHyperlinkListener(this);
    ScrollPane.setHorizontalScrollBarPolicy(JScrollPane.
                                            HORIZONTAL_SCROLLBAR_NEVER);
    ScrollPane.setVerticalScrollBarPolicy(JScrollPane.
                                          VERTICAL_SCROLLBAR_AS_NEEDED);
    ScrollPane.setBorder(border1);
    Close.setBackground(Color.white);
    Close.setBorder(border2);
    Close.setActionCommand("jButton1");
    Close.setText("Close");
    Close.addActionListener(new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        setVisible(false);
      }
    });

    Panel1.setBackground(Color.white);
    this.getContentPane().add(ScrollPane, BorderLayout.CENTER);
    this.getContentPane().add(Panel1,  BorderLayout.SOUTH);
    ScrollPane.getViewport().add(HelpPane, null);
    Panel1.add(Close, null);
  }

  public void hyperlinkUpdate(HyperlinkEvent e) {
    if (e.getEventType() == HyperlinkEvent.EventType.ACTIVATED) {
      JEditorPane pane = (JEditorPane) e.getSource();
      if (e instanceof HTMLFrameHyperlinkEvent) {
        HTMLFrameHyperlinkEvent evt = (HTMLFrameHyperlinkEvent) e;
        HTMLDocument doc = (HTMLDocument) pane.getDocument();
        doc.processHTMLFrameHyperlinkEvent(evt);
      }
      else {
        try {
          pane.setPage(e.getURL());
        }
        catch (Throwable t) {
          t.printStackTrace();
        }
      }
    }
  }

}