Help.java :  » Database-Client » VelaSource » vela » view » Java Open Source

/*
 * Copyright 2007 Madhav Pulipaka
 * 
 * This file is part of Vela.

 * Vela is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Vela is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Vela; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/
package vela.view;

import javax.swing.*;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLFrameHyperlinkEvent;

import java.awt.*;
import java.awt.event.*;
import java.io.File;
import java.io.IOException;

public class Help extends JDialog implements ActionListener, HyperlinkListener{
  
  private static Help messageBox;
  private JEditorPane taMessage;
  private static final int WIDTH = 1000;
  private static final int HEIGHT = 700;
  
  private Help(Frame frame, String title, boolean isModel)
  {
    super(frame, title, isModel);
    Container container = getContentPane();
    JButton btnOK = new JButton("Close");
    taMessage = new JEditorPane();
    taMessage.setEditable(false);
    taMessage.setEnabled(false);
    taMessage.addHyperlinkListener(this);
    container.add(new JScrollPane(taMessage));
    Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    setBounds((int)(screenSize.getWidth()/2)-(WIDTH/2), (int)(screenSize.getHeight()/2)-(HEIGHT/2), WIDTH, HEIGHT);
    btnOK.addActionListener(this);
    JPanel southPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
    southPanel.add(btnOK);
    container.add(southPanel, BorderLayout.SOUTH);
    taMessage.setFont(new Font("Verdana",Font.BOLD,11));
    taMessage.setDisabledTextColor(Color.BLACK);
    //taMessage.setBackground(Color.LIGHT_GRAY);
    btnOK.setFont(new Font("Verdana",Font.BOLD,12));
    //btnOK.setBackground(new Color(0,0,100));
    //btnOK.setForeground(Color.YELLOW);
  }
  
  public static void showMessage(Frame frame, String title, boolean isModel)
  {
    if(messageBox==null)
      messageBox = new Help(frame, title, isModel);
    messageBox.setMessage();    
    messageBox.setVisible(true);    
  }
  
  public void setMessage()
  {    
    try {
      File file = new File("./docs/Help.html");
      taMessage.setPage(file.toURL());
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
  }
  
  public void actionPerformed(ActionEvent arg0){
    setVisible(false);    
  }
  
  public void hyperlinkUpdate(HyperlinkEvent e) {
    setCursor(new Cursor(Cursor.WAIT_CURSOR));
    try{
          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();
                  }
              }
          }
    }finally{
      setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
    }
    }  
  
}