/* File: PopupFileDialog.java */

package O2PlibSS.gui;

import java.awt.*;
import java.io.*;


/**
 * Class PopupFileDialog is a file browser 
 *<P>
 * <P> 
 * This code is available at the HTMLtools project on SourceForge at
 * <A HREF="http://htmltools.sourceforge.org/">http://htmltools.sourceforge.org/</A>
 * under the "Common Public License Version 1.0" 
 * <A HREF="http://www.opensource.org/licenses/cpl1.0.php">
 * http://www.opensource.org/licenses/cpl1.0.php</A>.<P></P>
 * <P>
 * It was derived and refactored from the open source
 * MAExplorer (http://maexplorer.sourceforge.org/), and
 * Open2Dprot (http://Open2Dprot.sourceforge.net/) Table modules.
 * <P>
 * $Date: 2009/07/05 11:45:56 $ $Revision: 1.28 $
 * <BR> 
 * Copyright 2008, 2009 by Peter Lemkin 
 * E-Mail: lemkin@users.sourceforge.net 
 * <A HREF="http://lemkingroup.com/">http://lemkingroup.com/</A>
*/

public class PopupFileDialog extends Frame
{ /* PopupFileDialog*/
	 
  /** frame id */
  final static long
	serialVersionUID= 0;
			
  /** for use in popup FileDialog */
  public FileDialog 
    fileDialog;	
  
  
  /**
   * PopupFileDialog() - constructor
   */
  public PopupFileDialog()
  { /* PopupFileDialog */ 
  } /* PopupFileDialog */

  
  /**
   * popupFileDialog() - popup file dialog and get file name.
   * May be null if did CANCEL.
   * @param initialPath to start browsing
   * @param extension to change the filename filter. Null is no filter.
   * @param msg to display in prompt
   * @param fileLoadFlag if true, else do a SAVE
   * @return file name or null if did a cancel.
   */
  public String popupFileDialog(String initialPath, String extension,
                                String sPrompt, boolean fileLoadFlag)
  { /* popupFileDialog */
    Frame f= new Frame("File Name");
    String
      fileSeparator= System.getProperty("file.separator"),
      userDir= System.getProperty("user.dir")+fileSeparator;
    int
      idx= (initialPath==null)
              ? -1
              : initialPath.lastIndexOf(fileSeparator),
      fdType= (fileLoadFlag) ? FileDialog.LOAD : FileDialog.SAVE;
    String
      file,
      defDir= (idx==-1) ? userDir : initialPath.substring(0,idx),
      defFile= (idx==-1) ? initialPath : initialPath.substring(idx+1),
      directory= "",
      fileName= "";			/* fileName to return */
        
    fileDialog= new FileDialog(f, sPrompt, fdType);
    
    if(fileDialog==null)
    {
      return(null);
    }
    else
    { /* run the modal popup file dialog box */
      if(initialPath!=null)
      {
        fileDialog.setDirectory(defDir);
        fileDialog.setFile(defFile);
      }
      
      if(extension!=null && extension.length()>0)
        fileDialog.setFilenameFilter(new JavaExtensionFilter(extension));
      
      fileDialog.pack();
      fileDialog.setVisible(true);
      fileName= fileDialog.getFile();           /* This is MODAL. */
      directory= fileDialog.getDirectory();
      if(fileName==null)
        return(null);
      file= directory + fileName;
    }
    
    return(file);
  } /* popupFileDialog */
      
  
  /**
   * popupDirectoryDialog() - popup directory dialog and get directory name.
   * May be null if did CANCEL.
   * @param initialPath to start browsing
   * @param msg to display in prompt
   * @param floadFlag if true, else do a SAVE
   * @return directory name or null if did a cancel.
   */
  public String popupDirectoryDialog(String initialPath, String sPrompt,
                                     boolean loadFlag)
  { /* popupDirectoryDialog */
    String
      fileSeparator= System.getProperty("file.separator"),
      userDir= System.getProperty("user.dir")+fileSeparator;
    int
      idx= (initialPath==null)
              ? -1
              : initialPath.lastIndexOf(fileSeparator),
      fdType= (loadFlag) ? FileDialog.LOAD : FileDialog.SAVE;
    String
      fakeFile= "Browse to Folder - then press "+
                 ((loadFlag) ? "'Open'" : "'Save'"),
      //defDir= (idx==-1) ? userDir : initialPath.substring(0,idx);
      defDir= (idx==-1) ? userDir : initialPath;
        
    fileDialog= new FileDialog(this, sPrompt);
    fileDialog.setMode(fdType);   
    fileDialog.setDirectory(defDir); 
    fileDialog.setFile(fakeFile);
    fileDialog.setVisible(true);
    
    String newDir= fileDialog.getDirectory();  /* get selected results */
    if(newDir==null)
    {
      return(null);
    }
    
    return(newDir);
  } /* popupDirectoryDialog */
  
  
  /* FilenameFilter Class */
  class JavaExtensionFilter implements FilenameFilter
  { /* JavaExtensionFilter */
      
    public String
      extension= null;

    /**
     * JavaExtensionFilter() - Constructor 
     * @param extension
     */
    public JavaExtensionFilter(String extension)
    { this.extension= extension; }
 
    /** accept() - called by FileDialog to filter names
     * @param dir to search
     * @param name to test
     * @return true if name.endsWith(this.extension)
     */     
    public boolean accept(File dir, String name)
    { /* accept */
      if(extension==null || extension.length()==0)
        return(true);
      
      return(name.endsWith(extension)); 
    } /* accept */
    
  } /* JavaExtensionFilter */
  
    
  
} /* End of class PopupFileDialog*/