kona/src/org/feistymeow/dragdrop/dragdrop_list_test.java

   1 package org.feistymeow.dragdrop;
   2
   3 import java.awt.*;
   4 import java.io.*;
   5 import java.util.*;
   6 import java.util.List;
   7 import java.awt.event.*;
   8 import javax.swing.*;
   9 import javax.swing.event.*;
  10
  11 import org.apache.commons.logging.Log;
  12 import org.apache.commons.logging.LogFactory;
  13 import org.apache.log4j.PropertyConfigurator;
  14
  15 /**
  16  * A demo of the DragonDropHandler being used with a JList. Much love to the internet for lots of
  17  * examples.
  18  *
  19  * @author Chris Koeritz
  20  * @copyright Copyright (c) 2012-$now By University of Virginia
  21  * @license This file is free software; you can modify and redistribute it under the terms of the
  22  *          Apache License v2.0: http://www.apache.org/licenses/LICENSE-2.0
  23  */
  24 @SuppressWarnings("serial")
  25 public class dragdrop_list_test extends JFrame implements ListSelectionListener
  26 {
  27     private DraggableDroppableList list;
  28     private JTextField fileName;
  29     static private Log logger = LogFactory.getLog(dragdrop_list_test.DraggableDroppableList.class);
  30
  31         public dragdrop_list_test(String startPath)
  32     {
  33         super("dragdrop_test");
  34
  35         // Create the list and put it in a scroll pane
  36         list = new DraggableDroppableList();
  37         DefaultListModel listModel = (DefaultListModel) list.getModel();
  38         list.setCellRenderer(new CustomCellRenderer());
  39         list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
  40         list.setSelectedIndex(0);
  41         list.addListSelectionListener(this);
  42         JScrollPane listScrollPane = new JScrollPane(list);
  43
  44         String dirName = startPath + "/"; // make sure we think of it as a directory.
  45         String filelist[] = new File(dirName).list();
  46         for (int i = 0; i < filelist.length; i++) {
  47             String thisFileSt = dirName + filelist[i];
  48             File thisFile = new File(thisFileSt);
  49             // skip directories for now.
  50             if (thisFile.isDirectory())
  51                 continue;
  52             // skip dot files.
  53             if (filelist[i].startsWith("."))
  54                 continue;
  55             try {
  56                 listModel.addElement(makeNode(thisFile.getName(), thisFile.toURI().toURL()
  57                         .toString(), thisFile.getAbsolutePath()));
  58             } catch (java.net.MalformedURLException e) {
  59             }
  60         }
  61
  62         fileName = new JTextField(50);
  63         list.setSelectedIndex(0);
  64         int sel_index = list.getSelectedIndex();
  65         Object obj_at_index = listModel.getElementAt(sel_index);
  66         String name = obj_at_index.toString();
  67         fileName.setText(name);
  68
  69         // Create a panel that uses FlowLayout (the default).
  70         JPanel buttonPane = new JPanel();
  71         buttonPane.add(fileName);
  72
  73         Container contentPane = getContentPane();
  74         contentPane.add(listScrollPane, BorderLayout.CENTER);
  75         contentPane.add(buttonPane, BorderLayout.NORTH);
  76     }
  77
  78     public void valueChanged(ListSelectionEvent e)
  79     {
  80         if (e.getValueIsAdjusting() == false) {
  81             fileName.setText("");
  82             if (list.getSelectedIndex() != -1) {
  83                 String name = list.getSelectedValue().toString();
  84                 fileName.setText(name);
  85             }
  86         }
  87     }
  88
  89     private static Hashtable<String, String> makeNode(String name, String url, String strPath)
  90     {
  91         Hashtable<String, String> hashtable = new Hashtable<String, String>();
  92         hashtable.put("name", name);
  93         hashtable.put("url", url);
  94         hashtable.put("path", strPath);
  95         return hashtable;
  96     }
  97
  98     public class DraggableDroppableList extends JList implements IDragonDropDataProvider
  99     {
 100                 public DraggableDroppableList()
 101         {
 102             setModel(new DefaultListModel());
 103             setTransferHandler(new DragonTransferHandler(this));
 104             setDragEnabled(true);
 105         }
 106
 107         @Override
 108         public boolean consumeDropList(List<Object> fileSet, Point location)
 109         {
 110             logger.debug("into consume dropped files, file set is:");
 111             for (int i = 0; i < fileSet.size(); i++) {
 112                 logger.debug("   " + ((File) fileSet.get(i)).getPath());
 113             }
 114             return true;
 115         }
 116
 117         @Override
 118         public List<Object> provideDragList()
 119         {
 120             ArrayList<Object> toReturn = new ArrayList<Object>();
 121             if (getSelectedIndex() == -1)
 122                 return toReturn;
 123             Object obj = getSelectedValue();
 124             if (obj != null) {
 125                 @SuppressWarnings("unchecked")
 126                 Hashtable<String, String> table = (Hashtable<String, String>) obj;
 127                 toReturn.add(new File((String) table.get("path")));
 128             }
 129             return toReturn;
 130         }
 131     }
 132
 133     public class CustomCellRenderer implements ListCellRenderer
 134     {
 135         DefaultListCellRenderer listCellRenderer = new DefaultListCellRenderer();
 136
 137         public Component getListCellRendererComponent(JList list, Object value, int index,
 138                 boolean selected, boolean hasFocus)
 139         {
 140             listCellRenderer.getListCellRendererComponent(list, value, index, selected, hasFocus);
 141             listCellRenderer.setText(getValueString(value));
 142             return listCellRenderer;
 143         }
 144
 145         private String getValueString(Object value)
 146         {
 147             String returnString = "null";
 148             if (value != null) {
 149                 if (value instanceof Hashtable<?, ?>) {
 150                     @SuppressWarnings("unchecked")
 151                     Hashtable<String, String> h = (Hashtable<String, String>) value;
 152                     String name = (String) h.get("name");
 153                     String url = (String) h.get("url");
 154                     returnString = name + " ==> " + url;
 155                 } else {
 156                     returnString = "X: " + value.toString();
 157                 }
 158             }
 159             return returnString;
 160         }
 161     }
 162
 163     public static void main(String s[])
 164     {
 165         PropertyConfigurator.configure("log4j.properties");
 166         // starting with user's personal area.
 167         String homedir = System.getenv("HOME");
 168         if ((homedir == null) || (homedir.length() == 0)) {
 169             // fall back to the root if no home directory.
 170             homedir = "/";
 171         }
 172         JFrame frame = new dragdrop_list_test(homedir);
 173         frame.addWindowListener(new WindowAdapter()
 174         {
 175             public void windowClosing(WindowEvent e)
 176             {
 177                 System.exit(0);
 178             }
 179         });
 180         frame.pack();
 181         frame.setVisible(true);
 182     }
 183 }