VisClient/org/hfbk/util/DirectoryChooser.java

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package org.hfbk.util;

import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Dialog;
import java.awt.Frame;
import java.awt.List;
import java.awt.Panel;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.io.File;
import java.io.IOException;
import java.util.Collections;
import java.util.LinkedList;

public class DirectoryChooser extends Dialog{

        TextField dirField=new TextField(50);
        List dirList= new List(20);
        String oldDir;
        
        public DirectoryChooser(String title, File startDir) {
                super(new Frame(), title);
                
                oldDir=startDir.getAbsolutePath();
                dirField.setText(oldDir);
                add(dirField,BorderLayout.NORTH);
                
                
                updateList();
                add(dirList, BorderLayout.CENTER);
                dirList.addItemListener(new ItemListener(){
                        public void itemStateChanged(ItemEvent ie) {
                                if (ie.getStateChange()==ItemEvent.SELECTED){
                                        String dirName=dirList.getItem((Integer)ie.getItem());
                                        try {
                                                dirField.setText(new File(dirField.getText(), dirName ).getCanonicalPath());
                                        } catch (IOException e) {
                                                e.printStackTrace();
                                        }
                                        updateList();
                                }
                        }
                });
        
                Panel p=new Panel();
                p.add(new SimpleButton("CANCEL"){
                        void action() {
                                finish(false);
                        }
                });
                p.add(new SimpleButton("OK"){
                        void action() {
                                finish(true);
                        }
                });
                add(p, BorderLayout.SOUTH);
                
                pack();
                UIUtils.blackify(this);
                setModal(true);
        }
        
        void finish(boolean success){
                if (!success) dirField.setText(oldDir);
                dispose();
        }

        public String chooseDir(){
                setVisible(true); //dialog is modal, so this blocks until closed.
                return dirField.getText();
        };
        
        public class CaseInsensitiveComparator 
         implements java.util.Comparator<String> {
          public int compare(String o1, String o2) {
            String s1 = o1.toUpperCase();
            String s2 = o2.toUpperCase();
            return s1.compareTo(s2);
          }
        }

        void updateList(){
                LinkedList<String> entries=new LinkedList<String>();   //and faces as vertex indicies
                
                entries.add("..");

                for (File d: new File(dirField.getText()).listFiles())
                        if (d.isDirectory() && !d.isHidden())
                                entries.add(d.getName());
                        
                Collections.sort(entries, new CaseInsensitiveComparator());

                dirList.removeAll();
                for (String e: entries) dirList.add(e);
        }
        
        
        class SimpleButton extends Button {
                public SimpleButton(String text) {
                        super(text);
                        addActionListener(new ActionListener() {
                                public void actionPerformed(ActionEvent e) {
                                        action();
                                }
                        });
                }

                void action() {
                };
        }
}

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