1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
| import java.awt.BorderLayout;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.datatransfer.UnsupportedFlavorException;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import javax.swing.BorderFactory;
import javax.swing.DropMode;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.TransferHandler;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreePath;
import javax.swing.tree.TreeSelectionModel;
public class JTreeDnDSample extends JFrame
{
protected JTree _tree;
private DefaultTreeModel treeModel;
private DefaultMutableTreeNode rootNode;
private JScrollPane border;
public static void main(String[] args)
{
new JTreeDnDSample().setVisible(true);
}
public JTreeDnDSample()
{
super("Dnd");
initializeTree();
this.setLayout(new BorderLayout());
border = new JScrollPane(this._tree);
border.setBorder(BorderFactory.createTitledBorder("Tree"));
this.add(border, BorderLayout.CENTER);
this.setSize(400, 800);
}
protected void initializeTree()
{
this.rootNode = new DefaultMutableTreeNode("Root folder");
this.treeModel = new DefaultTreeModel(rootNode);
_tree = new JTree(treeModel);
_tree.setName("TREE");
_tree.setDragEnabled(true);
_tree.setDropMode(DropMode.ON_OR_INSERT);
_tree.setTransferHandler(new TreeTransferHandler());
_tree.setShowsRootHandles(true);
_tree.getSelectionModel().setSelectionMode(TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION);
_tree.setRowHeight(26);
//tree creation
DefaultMutableTreeNode folder = new DefaultMutableTreeNode("folder1");
DefaultMutableTreeNode file = new DefaultMutableTreeNode("file1.txt");
folder.add(file);
file = new DefaultMutableTreeNode("file2.txt");
folder.add(file);
rootNode.add(folder);
folder = new DefaultMutableTreeNode("folder2");
file = new DefaultMutableTreeNode("file1.txt");
folder.add(file);
file = new DefaultMutableTreeNode("file2.txt");
folder.add(file);
file = new DefaultMutableTreeNode("file3.txt");
folder.add(file);
rootNode.add(folder);
}
public void setTitle(String title)
{
border.setBorder(BorderFactory.createTitledBorder(title));
}
}
class TreeTransferHandler extends TransferHandler
{
/**
*
*/
private static final long serialVersionUID = 1L;
/**
* @see javax.swing.TransferHandler#canImport(javax.swing.JComponent,
* java.awt.datatransfer.DataFlavor[])
*/
private DataFlavor nodesFlavor;
private DataFlavor[] flavors = new DataFlavor[1];
private DefaultMutableTreeNode[] nodesToRemove;
public TreeTransferHandler()
{
super();
try
{
String mimeType = DataFlavor.javaJVMLocalObjectMimeType +
";class=\"" +
DefaultMutableTreeNode[].class.getName() +
"\"";
nodesFlavor = new DataFlavor(mimeType);
flavors[0] = nodesFlavor;
}
catch(ClassNotFoundException e)
{
System.out.println("ClassNotFound: " + e.getMessage());
}
}
public boolean importData(TransferHandler.TransferSupport support)
{
Transferable data = support.getTransferable();
if(!canImport(support))
{
return false;
}
// Extract transfer data.
List<DefaultMutableTreeNode> nodes = new ArrayList<DefaultMutableTreeNode>();
try
{
System.out.println("IMPORT DATA");
nodes = (List<DefaultMutableTreeNode>) data.getTransferData(nodesFlavor);
/*List<File> files = (List<File>)data.getTransferData(DataFlavor.javaFileListFlavor);
System.out.println("File size: " + nodes.size());
for(File f : files)
{
System.out.println("File: "+f.getName());
}*/
}
catch(UnsupportedFlavorException ufe)
{
System.out.println("UnsupportedFlavor: " + ufe.getMessage());
}
catch(java.io.IOException ioe)
{
System.out.println("I/O error: " + ioe.getMessage());
}
catch(Exception e)
{
e.printStackTrace();
}
// Get drop location info inside the tree.
JTree.DropLocation dl =
(JTree.DropLocation)support.getDropLocation();
int childIndex = dl.getChildIndex();
TreePath dest = dl.getPath();
DefaultMutableTreeNode parent = (DefaultMutableTreeNode)dest.getLastPathComponent();
JTree tree = (JTree)support.getComponent();
DefaultTreeModel model = (DefaultTreeModel)tree.getModel();
// Configure for drop mode.
int index = childIndex; // DropMode.INSERT
if(childIndex == -1) // DropMode.ON
index = parent.getChildCount();
// Add data to model.
for(int i = 0; i < nodes.size(); i++)
{
model.insertNodeInto(nodes.get(i), parent, index++);
}
// Remove nodes saved in nodesToRemove in createTransferable.
for(int i = 0; i < nodesToRemove.length; i++)
{
model.removeNodeFromParent(nodesToRemove[i]);
}
return true;
}
public boolean canImport(TransferHandler.TransferSupport support)
{
if(!support.isDrop())
return false;
support.setShowDropLocation(true);
if(!support.isDataFlavorSupported(DataFlavor.javaFileListFlavor)
&& !support.isDataFlavorSupported(nodesFlavor))
return false;
// Do not allow a drop on the drag source selections.
JTree.DropLocation dl = (JTree.DropLocation)support.getDropLocation();
JTree tree = (JTree)support.getComponent();
int dropRow = tree.getRowForPath(dl.getPath());
int[] selRows = tree.getSelectionRows();
if(selRows != null)
{
for(int i = 0; i < selRows.length; i++)
{
if(selRows[i] == dropRow)
return false;
}
}
//Do not allow a drop on a File (leaf)
try
{
TreePath targetPath = tree.getDropLocation().getPath();
DefaultMutableTreeNode node = (DefaultMutableTreeNode) targetPath.getLastPathComponent();
if(node.isLeaf())
{
return false;
}
}
catch(Exception ex)
{
System.out.println(ex.getMessage());
return false;
}
// Do not allow a non-leaf node to be copied to a level
// which is less than its source level.
TreePath dest = dl.getPath();
DefaultMutableTreeNode target = (DefaultMutableTreeNode)dest.getLastPathComponent();
TreePath path = tree.getPathForRow(selRows[0]);
DefaultMutableTreeNode firstNode = (DefaultMutableTreeNode)path.getLastPathComponent();
if(firstNode.getChildCount() > 0 && target.getLevel() < firstNode.getLevel())
{
return false;
}
return true;
}
//Do i have to use exportDone ?
protected void exportDone(JComponent source, Transferable data, int action)
{
if((action & MOVE) == MOVE)
{
//GET THE FILE DESTINATION FOLDER
//LAUNCH THE DOWNLOAD FILE PROCESS
}
}
protected Transferable createTransferable(JComponent c)
{
JTree tree = (JTree)c;
TreePath[] paths = tree.getSelectionPaths();
if(paths != null)
{
// Make up a node array of copies for transfer and
// another for/of the nodes that will be removed in
// exportDone after a successful drop.
ArrayList<DefaultMutableTreeNode> copies = new ArrayList<DefaultMutableTreeNode>();
ArrayList<DefaultMutableTreeNode> toRemove = new ArrayList<DefaultMutableTreeNode>();
//Fake files created in order to allow the export on explorer
ArrayList<File> fakeFiles = new ArrayList<File>();
DefaultMutableTreeNode node = (DefaultMutableTreeNode)paths[0].getLastPathComponent();
DefaultMutableTreeNode copy = copy(node);
copies.add(copy);
toRemove.add(node);
for(int i = 1; i < paths.length; i++)
{
DefaultMutableTreeNode next = (DefaultMutableTreeNode)paths[i].getLastPathComponent();
// Do not allow higher level nodes to be added to list.
if(next.getLevel() < node.getLevel())
{
break;
}
else if(next.getLevel() > node.getLevel())
{ // child node
copy.add(copy(next));
// node already contains child
}
else
{ // sibling
copies.add(copy(next));
toRemove.add(next);
}
}
DefaultMutableTreeNode[] nodesToMove = copies.toArray(new DefaultMutableTreeNode[copies.size()]);
for(DefaultMutableTreeNode n : nodesToMove)
{
File f = new File(n.toString());
fakeFiles.add(f);
}
nodesToRemove = toRemove.toArray(new DefaultMutableTreeNode[toRemove.size()]);
return new NodesTransferable(fakeFiles, Arrays.asList(nodesToMove));
}
return null;
}
/** Defensive copy used in createTransferable. */
private DefaultMutableTreeNode copy(DefaultMutableTreeNode node)
{
return new DefaultMutableTreeNode(node);
}
public int getSourceActions(JComponent c)
{
return COPY_OR_MOVE;
}
public class NodesTransferable implements Transferable
{
private List<File> data = null;
private List<DefaultMutableTreeNode> nodes = null;
private DataFlavor[] flavors = new DataFlavor[2];
public NodesTransferable(final List<File> data, final List<DefaultMutableTreeNode> nodes)
{
super();
this.data = data;
this.nodes = nodes;
flavors[0] = DataFlavor.javaFileListFlavor;
flavors[1] = nodesFlavor;
}
public DataFlavor[] getTransferDataFlavors()
{
return flavors;
}
public boolean isDataFlavorSupported(final DataFlavor flavor)
{
return true;
}
public List<?> getTransferData(final DataFlavor flavor) throws UnsupportedFlavorException, IOException
{
if(flavor.equals(DataFlavor.javaFileListFlavor))
return data;
else if(flavor.equals(nodesFlavor))
return nodes;
else
{
System.out.println("Unsuported flavor");
return null;
}
}
}
} |
TransferHandler: action lors du drop de fichiers dans l'explorer (Windows ou autre plates-formes)
Répondre avec citation
Partager