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
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
| /**
*
*/
package imagesBrowser;
/*
* Copyright Jim Burton 2004
*
* This file is part of JMaid.
*
* JMaid is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* JMaid is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* JMaid; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
* Suite 330, Boston, MA 02111-1307 USA
*
* http://forum.java.sun.com/thread.jspa?threadID=497385&messageID=2347123
*/
import java.io.File;
import java.io.FilenameFilter;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Arrays;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.event.TreeExpansionEvent;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.event.TreeWillExpandListener;
import javax.swing.text.Position;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.ExpandVetoException;
import javax.swing.tree.MutableTreeNode;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreePath;
import javax.swing.tree.TreeSelectionModel;
/**
* FileTree1 class displays the whole directory structure in the RHS of a
* JSplitPane.
*
* @author jim burton
*/
public class FileTree extends JScrollPane implements TreeWillExpandListener,
TreeSelectionListener {
private static final long serialVersionUID = 7970045957138128200L;
private MutableTreeNode root;
private JTree tree;
private File currentFile;
private boolean newFile = true;
private static String PLACEHOLDER = "@@_jb_special_placeholder_@@";
private ImagesBrowser imagesBrowser;
/** Creates a new instance of FileTree */
public FileTree(ImagesBrowser imagesBrowser) {
this.imagesBrowser = imagesBrowser;
getFiles();
this.add(tree);
this.setViewportView(tree);
}
/**
* getFiles builds the tree from scratch. When the tree is first loaded it
* contains the root directories or drives and the first level below that.
* Directories below that are given a special placeholder which is
* recognised by the TreeWillExpand event which then loads the contents of
* that dir using addDirToModel. This is to avoid the overhead of loading
* the whole tree.
*/
public void getFiles() {
root = new DefaultMutableTreeNode("fmTopLevel");
File[] roots = File.listRoots();
for (int i = 0; i < roots.length; i++) {
File f = roots[i];
String name = f.toString();
if (name.equals("/"))
name = "root";
MutableTreeNode node = new DefaultMutableTreeNode(name);
root.insert(node, root.getChildCount());
// Windows problem: skip floppy drive on startup as an empty drive
// gives annoying message...
if (!name.equals("A:\\"))
addDirToModel(f, node);
}
TreeModel model = new DefaultTreeModel(root);
tree = new JTree(model);
tree.getSelectionModel().setSelectionMode(
TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION);
tree.setRootVisible(false);
tree.setEditable(true);
tree.setExpandsSelectedPaths(true);
tree.setScrollsOnExpand(true);
tree.setShowsRootHandles(true);
tree.addTreeSelectionListener(this);
tree.addTreeWillExpandListener(this);
tree.setDragEnabled(true);
// open to home directory
setTree(new File(System.getProperty("user.home")), newFile);
}
/**
* setTree is called to select a new node in the tree.
*
* @param f
* the new selected File object
* @param newFile
* whether or not to also send this file to the DetailPane
*/
public void setTree(File f, boolean newFile) {
this.newFile = newFile;
currentFile = f;
TreePath p = pathFromFile(f);
TreePath thePath;
int lastIndex = 0;
for (int i = 1; i < p.getPathCount(); i++) {
thePath = tree.getNextMatch(p.getPathComponent(i).toString(),
lastIndex, Position.Bias.Forward);
tree.expandPath(thePath);
lastIndex = tree.getRowForPath(thePath);
}
if (newFile)
tree.setSelectionPath(p);
tree.scrollPathToVisible(p);
}
/**
* fileFromPath takes a TreePath object and creates a corresponding File
* object.
*
* @param f
* the File object
*/
public static File fileFromPath(TreePath p) {
StringBuffer filePath = new StringBuffer();
for (int i = 1; i < p.getPathCount(); i++) {
String component = (p.getPathComponent(i).toString().equals("root")) ? "//"
: p.getPathComponent(i).toString();
filePath.append(component + File.separator);
}
return new File(filePath.toString());
}
/**
* pathFromFile takes a file object and creates a TreePath object which
* relates to the tree in the filetree component.
*
* @param f
* the File object
*/
public static TreePath pathFromFile(File f) {
String str = f.toString();
Object[] nodes;
if (str.equals("/")) {
nodes = new Object[2];
nodes[0] = new DefaultMutableTreeNode("fmTopLevel");
nodes[1] = new DefaultMutableTreeNode("root");
return new TreePath(nodes);
} else {
java.util.List<Serializable> nodeList = new ArrayList<Serializable>();
nodeList.add(new DefaultMutableTreeNode("fmTopLevel"));
String safeSeparator = (File.separator.equals("\\")) ? "\\\\"
: File.separator;
String[] temp = f.toString().split(safeSeparator);
for (int i = 0; i < temp.length; i++) {
String t = temp[i];
if (t.endsWith(":")
&& System.getProperty("os.name").indexOf("Windows") > -1)
t += "\\";
nodeList.add(new DefaultMutableTreeNode(t));
}
if (File.separator.equals("/"))
nodeList.set(1, "root");
nodes = nodeList.toArray();
return new TreePath(nodes);
}
}
/**
* selects a new node in the tree.
*
* @param p
* the new selected TreePath object
*/
public void setTree(TreePath p, boolean newFile) {
setTree(fileFromPath(p), newFile);
}
/**
* attempts to rebuild the tree from scratch to it's current position, to
* reflect changes in the file system
*
*
*/
public void refreshTree() {
TreePath[] allPaths = tree.getSelectionPaths();
for (int i = 0; i < allPaths.length; i++)
setTree(allPaths[i], false);
}
/**
* addDirToModel takes a directory filepath and adds it's nested directories
* to the tree model, if they aren't already there.
*
* @param f
* the directory to add
* @param n
* the node at which to add new nodes
*/
private void addDirToModel(File f, MutableTreeNode n) {
File[] contents = f.listFiles(new DirsOnlyFilter(true));
if (contents != null)
Arrays.sort(contents);
File t = null;
try {
for (int i = 0; i < contents.length; i++) {
t = contents[i];
String name = t.getName();
MutableTreeNode node = new DefaultMutableTreeNode(name);
n.insert(node, n.getChildCount());
// if this file contains files only they will never be shown in
// the filetree view
// so only show it as a node if it contains dirs
if (containsDirs(t))
node.insert(new DefaultMutableTreeNode(PLACEHOLDER), 0);
}
} catch (Exception e) {
System.out.println(
this.getClass().getName()
+"."+Thread.currentThread().getStackTrace()[1].getMethodName()
+" exception: '"
+ (t != null ? t : f) + "' inaccessible");
}
}
/**
* containsDir returns true if the given file contains a directory - used to
* determine whether to add a dummy child to it on the tree
*/
private boolean containsDirs(File f) {
if (!f.canRead())
return false;
return (f.listFiles(new DirsOnlyFilter(true)).length > 0);
}
/**
* getSelectedFiles returns a File[] of the files represented by the
* selected treepaths
*/
public File[] getSelectedFiles() {
TreePath[] selectedPaths = tree.getSelectionPaths();
File[] fileBuffer = new File[selectedPaths.length];
for (int i = 0; i < selectedPaths.length; i++)
fileBuffer[i] = fileFromPath(selectedPaths[i]);
return fileBuffer;
}
/** getCurrentFile returns the value of the currently selected file. */
public File getCurrentFile() {
return currentFile;
}
/**
* setSelectionPath sets the selectionpath of the tree component.
*
* @param p
* the new selection path
*/
public void setSelectionPath(TreePath p) {
System.out.println("opening " + p);
tree.setSelectionPath(p);
}
//////////////////////////////////////////
// Event handlers
//////////////////////////////////////////
/** treeWillCollapse not used */
public void treeWillCollapse(TreeExpansionEvent event)
throws ExpandVetoException {
}
/**
* treeWillExpand calls addDirToModel to build this part of the tree.
*/
public void treeWillExpand(TreeExpansionEvent event)
throws ExpandVetoException {
TreePath path = event.getPath();
MutableTreeNode node = (MutableTreeNode) path.getPathComponent(path
.getPathCount() - 1);
if (node.getChildAt(0).toString().equals(PLACEHOLDER)) {
node.remove(0);
addDirToModel(fileFromPath(path), node);
}
}
/**
* valueChanged receives treeselection events and loads the file or dir into
* detailpane
*/
public void valueChanged(TreeSelectionEvent e) {
TreePath p = tree.getSelectionPath();
if (p != null) { // it could be null if the tree was just collapsed
// and the selected node is invisible
currentFile = fileFromPath(tree.getSelectionPath());
// if we don't have permission, do nothing
if (currentFile.canRead()) {
// dp.receiveFile(currentFile, newFile);
// Mise à jour du panneau de la galerie
if (this.imagesBrowser != null)
this.imagesBrowser
.loadImages(currentFile.getAbsolutePath());
} else {
return;
}
}
}
// public static void main(String[] args) { FileTree ft = new
// FileTree(null); ft.setSize(300, 600); ft.setLocation(100,100);
// ft.setVisible(true); }
/*
* Obsolète
*
* public static void main(String[] args) { FileTree ft = new
* FileTree(null); ft.setSize(300, 600); ft.setLocation(100,100);
* ft.setVisible(true); }
*/
/**
* Filtre de fichier n'acceptant que les répertoires
*/
class DirsOnlyFilter implements FilenameFilter {
boolean showHidden;
public DirsOnlyFilter(boolean showHidden) {
this.showHidden = showHidden;
}
public boolean accept(File dir, String name) {
File f = new File(dir.getPath() + File.separator + name);
if (!f.isDirectory()) {
return false;
} else if (!showHidden) {
return (!(name.startsWith(".") || f.isHidden()));
}
return true;
}
}
} |
