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", "rawtypes"})
  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     @SuppressWarnings("unchecked")
  32         public dragdrop_list_test(String startPath)
  33     {
  34         super("dragdrop_test");
  35
  36         // Create the list and put it in a scroll pane
  37         list = new DraggableDroppableList();
  38         DefaultListModel listModel = (DefaultListModel) list.getModel();
  39         list.setCellRenderer(new CustomCellRenderer());
  40         list.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
  41         list.setSelectedIndex(0);
  42         list.addListSelectionListener(this);
  43         JScrollPane listScrollPane = new JScrollPane(list);
  44
  45         String dirName = startPath + "/"; // make sure we think of it as a directory.
  46         String filelist[] = new File(dirName).list();
  47         for (int i = 0; i < filelist.length; i++) {
  48             String thisFileSt = dirName + filelist[i];
  49             File thisFile = new File(thisFileSt);
  50             // skip directories for now.
  51             if (thisFile.isDirectory())
  52                 continue;
  53             // skip dot files.
  54             if (filelist[i].startsWith("."))
  55                 continue;
  56             try {
  57                 listModel.addElement(makeNode(thisFile.getName(), thisFile.toURI().toURL()
  58                         .toString(), thisFile.getAbsolutePath()));
  59             } catch (java.net.MalformedURLException e) {
  60             }
  61         }
  62
  63         fileName = new JTextField(50);
  64         list.setSelectedIndex(0);
  65         int sel_index = list.getSelectedIndex();
  66         Object obj_at_index = listModel.getElementAt(sel_index);
  67         String name = obj_at_index.toString();
  68         fileName.setText(name);
  69
  70         // Create a panel that uses FlowLayout (the default).
  71         JPanel buttonPane = new JPanel();
  72         buttonPane.add(fileName);
  73
  74         Container contentPane = getContentPane();
  75         contentPane.add(listScrollPane, BorderLayout.CENTER);
  76         contentPane.add(buttonPane, BorderLayout.NORTH);
  77     }
  78
  79     public void valueChanged(ListSelectionEvent e)
  80     {
  81         if (e.getValueIsAdjusting() == false) {
  82             fileName.setText("");
  83             if (list.getSelectedIndex() != -1) {
  84                 String name = list.getSelectedValue().toString();
  85                 fileName.setText(name);
  86             }
  87         }
  88     }
  89
  90     private static Hashtable<String, String> makeNode(String name, String url, String strPath)
  91     {
  92         Hashtable<String, String> hashtable = new Hashtable<String, String>();
  93         hashtable.put("name", name);
  94         hashtable.put("url", url);
  95         hashtable.put("path", strPath);
  96         return hashtable;
  97     }
  98
  99     public class DraggableDroppableList extends JList implements IDragonDropDataProvider
 100     {
 101         @SuppressWarnings("unchecked")
 102                 public DraggableDroppableList()
 103         {
 104             setModel(new DefaultListModel());
 105             setTransferHandler(new DragonTransferHandler(this));
 106             setDragEnabled(true);
 107         }
 108
 109         @Override
 110         public boolean consumeDropList(List<Object> fileSet, Point location)
 111         {
 112             logger.debug("into consume dropped files, file set is:");
 113             for (int i = 0; i < fileSet.size(); i++) {
 114                 logger.debug("   " + ((File) fileSet.get(i)).getPath());
 115             }
 116             return true;
 117         }
 118
 119         @Override
 120         public List<Object> provideDragList()
 121         {
 122             ArrayList<Object> toReturn = new ArrayList<Object>();
 123             if (getSelectedIndex() == -1)
 124                 return toReturn;
 125             Object obj = getSelectedValue();
 126             if (obj != null) {
 127                 @SuppressWarnings("unchecked")
 128                 Hashtable<String, String> table = (Hashtable<String, String>) obj;
 129                 toReturn.add(new File((String) table.get("path")));
 130             }
 131             return toReturn;
 132         }
 133     }
 134
 135     public class CustomCellRenderer implements ListCellRenderer
 136     {
 137         DefaultListCellRenderer listCellRenderer = new DefaultListCellRenderer();
 138
 139         public Component getListCellRendererComponent(JList list, Object value, int index,
 140                 boolean selected, boolean hasFocus)
 141         {
 142             listCellRenderer.getListCellRendererComponent(list, value, index, selected, hasFocus);
 143             listCellRenderer.setText(getValueString(value));
 144             return listCellRenderer;
 145         }
 146
 147         private String getValueString(Object value)
 148         {
 149             String returnString = "null";
 150             if (value != null) {
 151                 if (value instanceof Hashtable<?, ?>) {
 152                     @SuppressWarnings("unchecked")
 153                     Hashtable<String, String> h = (Hashtable<String, String>) value;
 154                     String name = (String) h.get("name");
 155                     String url = (String) h.get("url");
 156                     returnString = name + " ==> " + url;
 157                 } else {
 158                     returnString = "X: " + value.toString();
 159                 }
 160             }
 161             return returnString;
 162         }
 163     }
 164
 165     public static void main(String s[])
 166     {
 167         PropertyConfigurator.configure("log4j.properties");
 168         // starting with user's personal area.
 169         String homedir = System.getenv("HOME");
 170         if ((homedir == null) || (homedir.length() == 0)) {
 171             // fall back to the root if no home directory.
 172             homedir = "/";
 173         }
 174         JFrame frame = new dragdrop_list_test(homedir);
 175         frame.addWindowListener(new WindowAdapter()
 176         {
 177             public void windowClosing(WindowEvent e)
 178             {
 179                 System.exit(0);
 180             }
 181         });
 182         frame.pack();
 183         frame.setVisible(true);
 184     }
 185 }