content: /*
   *    This program 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.
   *
   *    This program 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 this program; if not, write to the Free Software
   *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   */
  
  /*
   * ArffViewer.java
   * Copyright (C) 2005 University of Waikato, Hamilton, New Zealand
   *
   */
  
  package weka.gui.arffviewer;
  
  import weka.core.Memory;
  import weka.gui.ComponentHelper;
  import weka.gui.LookAndFeel;
  
  import java.awt.BorderLayout;
  import java.awt.event.WindowEvent;
  import java.awt.event.WindowListener;
  
  import javax.swing.JFrame;
  import javax.swing.JOptionPane;
  
  /**
   * A little tool for viewing ARFF files.
   *
   *
   * @author FracPete (fracpete at waikato dot ac dot nz)
   * @version $Revision: 4719 $ 
   */
  
  public class ArffViewer 
    extends JFrame
    implements WindowListener {
    
    /** for serialization */
    static final long serialVersionUID = -7455845566922685175L;
  
    /** the main panel */
    private ArffViewerMainPanel m_MainPanel;
    
    /** for monitoring the Memory consumption */
    private static Memory m_Memory = new Memory(true);
    
    /** the viewer if started from command line */
    private static ArffViewer m_Viewer;
  
    /** whether the files were already loaded */
    private static boolean m_FilesLoaded;
  
    /** the command line arguments */
    private static String[] m_Args;
    
    /**
     * initializes the object
     */
    public ArffViewer() {
      super("ARFF-Viewer");
      createFrame();
    }
    
    /**
     * creates all the components in the frame
     */
    protected void createFrame() {
      // basic setup
      setIconImage(ComponentHelper.getImage("weka_icon.gif"));
      setSize(ArffViewerMainPanel.WIDTH, ArffViewerMainPanel.HEIGHT);
      setCenteredLocation();
      setDefaultCloseOperation(DISPOSE_ON_CLOSE);
      // remove the listener - otherwise we get the strange behavior that one
      // frame receives a window-event for every single open frame!
      removeWindowListener(this);
      // add listener anew
      addWindowListener(this);
      
      getContentPane().setLayout(new BorderLayout());
      
      m_MainPanel = new ArffViewerMainPanel(this);
      m_MainPanel.setConfirmExit(false);
      getContentPane().add(m_MainPanel, BorderLayout.CENTER);
      
      setJMenuBar(m_MainPanel.getMenu());
    }
    
    /**
     * returns the left coordinate if the frame would be centered
     * 
     * @return 		the left coordinate
     */
    protected int getCenteredLeft() {
      int            width;
      int            x;
      
      width  = getBounds().width;
      x      = (getGraphicsConfiguration().getBounds().width  - width) / 2;
      
      if (x < 0) 
        x = 0;
      
      return x;
    }
    
    /**
     * returns the top coordinate if the frame would be centered
     * 
     * @return		the top coordinate
     */
    protected int getCenteredTop() {
      int            height;
      int            y;
      
      height = getBounds().height;
      y      = (getGraphicsConfiguration().getBounds().height - height) / 2;
      
      if (y < 0) 
        y = 0;
      
      return y;
    }
    
    /**
     * positions the window at the center of the screen
     */
    public void setCenteredLocation() { 
      setLocation(getCenteredLeft(), getCenteredTop());
    }
    
    /**
     * whether to present a MessageBox on Exit or not
     * @param confirm           whether a MessageBox pops up or not to confirm
     *                          exit
     */
    public void setConfirmExit(boolean confirm) {
      m_MainPanel.setConfirmExit(confirm);
    }
    
    /**
     * returns the setting of whether to display a confirm messagebox or not
     * on exit
     * @return                  whether a messagebox is displayed or not
     */
    public boolean getConfirmExit() {
      return m_MainPanel.getConfirmExit();
    }
  
    /**
     * whether to do a System.exit(0) on close
     * 
     * @param value	enables/disables the System.exit(0)
     */
    public void setExitOnClose(boolean value) {
      m_MainPanel.setExitOnClose(value);
    }
  
    /**
     * returns TRUE if a System.exit(0) is done on a close
     * 
     * @return		true if System.exit(0) is done
     */
    public boolean getExitOnClose() {
      return m_MainPanel.getExitOnClose();
    }
    
    /**
     * returns the main panel
     * 
     * @return		the main panel
     */
    public ArffViewerMainPanel getMainPanel() {
      return m_MainPanel;
    }
    
    /**
     * validates and repaints the frame
     */
    public void refresh() {
      validate();
      repaint();
    }
  
    /**
     * invoked when a window is activated
     * 
     * @param e		the window event
     */
    public void windowActivated(WindowEvent e) {
    }
    
    /**
     * invoked when a window is closed
     * 
     * @param e		the window event
     */
    public void windowClosed(WindowEvent e) {
    }
    
    /**
     * invoked when a window is in the process of closing
     * 
     * @param e		the window event
     */
    public void windowClosing(WindowEvent e) {
      int         button;
      
      while (getMainPanel().getTabbedPane().getTabCount() > 0)
        getMainPanel().closeFile(false);
      
      if (getConfirmExit()) {
        button = ComponentHelper.showMessageBox(
            this,
            "Quit - " + getTitle(),
            "Do you really want to quit?",
            JOptionPane.YES_NO_OPTION,
            JOptionPane.QUESTION_MESSAGE);
        if (button == JOptionPane.YES_OPTION)
          dispose();
      } 
      else {
        dispose();
      }
  
      if (getExitOnClose())
        System.exit(0);
    }
    
    /**
     * invoked when a window is deactivated
     * 
     * @param e		the window event
     */
    public void windowDeactivated(WindowEvent e) {
    }
    
    /**
     * invoked when a window is deiconified
     * 
     * @param e		the window event
     */
    public void windowDeiconified(WindowEvent e) {
    }
    
    /**
     * invoked when a window is iconified
     * 
     * @param e		the window event
     */
    public void windowIconified(WindowEvent e) {
    }
    
    /**
     * invoked when a window is has been opened
     * 
     * @param e		the window event
     */
    public void windowOpened(WindowEvent e) {
    }
    
    /**
     * returns only the classname
     * 
     * @return 		the classname
     */
    public String toString() {
      return this.getClass().getName();
    }
    
    /**
     * shows the frame and it tries to load all the arff files that were
     * provided as arguments.
     * 
     * @param args	the commandline parameters
     * @throws Exception	if something goes wrong
     */
    public static void main(String[] args) throws Exception {
      weka.core.logging.Logger.log(weka.core.logging.Logger.Level.INFO, "Logging started");
      LookAndFeel.setLookAndFeel();
      
      try {
        // uncomment to disable the memory management:
        //m_Memory.setEnabled(false);
  
        m_Viewer      = new ArffViewer();
        m_Viewer.setExitOnClose(true);
        m_Viewer.setVisible(true);
        m_FilesLoaded = false;
        m_Args        = args;
  
        Thread memMonitor = new Thread() {
          public void run() {
            while(true) {
              try {
                if ( (m_Args.length > 0) && (!m_FilesLoaded) ) {
                  for (int i = 0; i < m_Args.length; i++) {
                    System.out.println("Loading " + (i+1) + "/" 
                        + m_Args.length +  ": '" + m_Args[i] + "'...");
                    m_Viewer.getMainPanel().loadFile(m_Args[i]);
                  }
                  m_Viewer.getMainPanel().getTabbedPane().setSelectedIndex(0);
                  System.out.println("Finished!");
                  m_FilesLoaded = true;
                }
  
                //System.out.println("before sleeping");
                Thread.sleep(4000);
                
                System.gc();
                
                if (m_Memory.isOutOfMemory()) {
                  // clean up
                  m_Viewer.dispose();
                  m_Viewer = null;
                  System.gc();
  
                  // stop threads
                  m_Memory.stopThreads();
  
                  // display error
                  System.err.println("\ndisplayed message:");
                  m_Memory.showOutOfMemory();
                  System.err.println("\nrestarting...");
  
                  // restart GUI
                  System.gc();
                  m_Viewer = new ArffViewer();
                  m_Viewer.setExitOnClose(true);
                  m_Viewer.setVisible(true);
                  // Note: no re-loading of datasets, otherwise we could end up
                  //       in an endless loop!
                }
              }
              catch(InterruptedException ex) { 
                ex.printStackTrace(); 
              }
            }
          }
        };
  
        memMonitor.setPriority(Thread.NORM_PRIORITY);
        memMonitor.start();    
      } 
      catch (Exception ex) {
        ex.printStackTrace();
        System.err.println(ex.getMessage());
      }
    }
  }
  