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41
42 import javax.swing.*;
43 import javax.swing.event.*;
44 import javax.swing.text.*;
45 import javax.swing.border.*;
46 import javax.swing.colorchooser.*;
47 import javax.swing.filechooser.*;
48 import javax.accessibility.*;
49
50 import java.awt.*;
51 import java.awt.event.*;
52 import java.beans.*;
53 import java.util.*;
54 import java.io.*;
55 import java.applet.*;
56 import java.net.*;
57
58
64 public class FileChooserDemo extends DemoModule {
65 JLabel theImage;
66 Icon jpgIcon;
67 Icon gifIcon;
68
69
72 public static void main(String  [] args) {
73 FileChooserDemo demo = new FileChooserDemo(null);
74 demo.mainImpl();
75 }
76
77
80 public FileChooserDemo(SwingSet2 swingset) {
81 super(swingset, "FileChooserDemo", "toolbar/JFileChooser.gif");
84 createFileChooserDemo();
85 }
86
87 public void createFileChooserDemo() {
88 theImage = new JLabel("");
89 jpgIcon = createImageIcon("filechooser/jpgIcon.jpg", "jpg image");
90 gifIcon = createImageIcon("filechooser/gifIcon.gif", "gif image");
91
92 JPanel demoPanel = getDemoPanel();
93 demoPanel.setLayout(new BoxLayout(demoPanel, BoxLayout.Y_AXIS));
94
95 JPanel innerPanel = new JPanel();
96 innerPanel.setLayout(new BoxLayout(innerPanel, BoxLayout.X_AXIS));
97
98 demoPanel.add(Box.createRigidArea(VGAP20));
99 demoPanel.add(innerPanel);
100 demoPanel.add(Box.createRigidArea(VGAP20));
101
102 innerPanel.add(Box.createRigidArea(HGAP20));
103
104 JPanel buttonPanel = new JPanel() {
106 public Dimension getMaximumSize() {
107 return new Dimension(getPreferredSize().width, super.getMaximumSize().height);
108 }
109 };
110 buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.Y_AXIS));
111
112 buttonPanel.add(Box.createRigidArea(VGAP15));
113 buttonPanel.add(createPlainFileChooserButton());
114 buttonPanel.add(Box.createRigidArea(VGAP15));
115 buttonPanel.add(createPreviewFileChooserButton());
116 buttonPanel.add(Box.createRigidArea(VGAP15));
117 buttonPanel.add(createCustomFileChooserButton());
118 buttonPanel.add(Box.createVerticalGlue());
119
120 JPanel imagePanel = new JPanel();
122 imagePanel.setLayout(new BorderLayout());
123 imagePanel.setBorder(new BevelBorder(BevelBorder.LOWERED));
124 JScrollPane scroller = new JScrollPane(theImage);
125 scroller.getVerticalScrollBar().setUnitIncrement(10);
126 scroller.getHorizontalScrollBar().setUnitIncrement(10);
127 imagePanel.add(scroller, BorderLayout.CENTER);
128
129 innerPanel.add(buttonPanel);
131 innerPanel.add(Box.createRigidArea(HGAP30));
132 innerPanel.add(imagePanel);
133 innerPanel.add(Box.createRigidArea(HGAP20));
134 }
135
136 public JFileChooser createFileChooser() {
137 JFileChooser fc = new JFileChooser();
139 if (getSwingSet2() != null && getSwingSet2().isDragEnabled()) {
140 fc.setDragEnabled(true);
141 }
142
143 File swingFile = new File("resources/images/About.jpg");
145 if(swingFile.exists()) {
146 fc.setCurrentDirectory(swingFile);
147 fc.setSelectedFile(swingFile);
148 }
149
150 return fc;
151 }
152
153
154 public JButton createPlainFileChooserButton() {
155 Action a = new AbstractAction(getString("FileChooserDemo.plainbutton")) {
156 public void actionPerformed(ActionEvent e) {
157 JFileChooser fc = createFileChooser();
158
159 int result = fc.showOpenDialog(getDemoPanel());
161
162 if(result == JFileChooser.APPROVE_OPTION) {
164 loadImage(fc.getSelectedFile().getPath());
165 }
166 }
167 };
168 return createButton(a);
169 }
170
171 public JButton createPreviewFileChooserButton() {
172 Action a = new AbstractAction(getString("FileChooserDemo.previewbutton")) {
173 public void actionPerformed(ActionEvent e) {
174 JFileChooser fc = createFileChooser();
175
176 javax.swing.filechooser.FileFilter filter = createFileFilter(
178 getString("FileChooserDemo.filterdescription"),
179 "jpg", "gif");
180 ExampleFileView fileView = new ExampleFileView();
181 fileView.putIcon("jpg", jpgIcon);
182 fileView.putIcon("gif", gifIcon);
183 fc.setFileView(fileView);
184 fc.addChoosableFileFilter(filter);
185 fc.setFileFilter(filter);
186
187 fc.setAccessory(new FilePreviewer(fc));
189
190 int result = fc.showOpenDialog(getDemoPanel());
192
193 if(result == JFileChooser.APPROVE_OPTION) {
195 loadImage(fc.getSelectedFile().getPath());
196 }
197 }
198 };
199 return createButton(a);
200 }
201
202 JDialog dialog;
203 JFileChooser fc;
204
205 private javax.swing.filechooser.FileFilter createFileFilter(
206 String description, String ...extensions) {
207 description = createFileNameFilterDescriptionFromExtensions(
208 description, extensions);
209 return new FileNameExtensionFilter(description, extensions);
210 }
211
212 private String createFileNameFilterDescriptionFromExtensions(
213 String description, String [] extensions) {
214 String fullDescription = (description == null) ?
215 "(" : description + " (";
216 fullDescription += "." + extensions[0];
218 for (int i = 1; i < extensions.length; i++) {
219 fullDescription += ", .";
220 fullDescription += extensions[i];
221 }
222 fullDescription += ")";
223 return fullDescription;
224 }
225
226 public JButton createCustomFileChooserButton() {
227 Action a = new AbstractAction(getString("FileChooserDemo.custombutton")) {
228 public void actionPerformed(ActionEvent e) {
229 fc = createFileChooser();
230
231 javax.swing.filechooser.FileFilter filter = createFileFilter(
233 getString("FileChooserDemo.filterdescription"),
234 "jpg", "gif");
235 ExampleFileView fileView = new ExampleFileView();
236 fileView.putIcon("jpg", jpgIcon);
237 fileView.putIcon("gif", gifIcon);
238 fc.setFileView(fileView);
239 fc.addChoosableFileFilter(filter);
240
241 fc.setAccessory(new FilePreviewer(fc));
243
244 fc.setControlButtonsAreShown(false);
246
247 JPanel custom = new JPanel();
250 custom.setLayout(new BoxLayout(custom, BoxLayout.Y_AXIS));
251 custom.add(Box.createRigidArea(VGAP10));
252 JLabel description = new JLabel(getString("FileChooserDemo.description"));
253 description.setAlignmentX(JLabel.CENTER_ALIGNMENT);
254 custom.add(description);
255 custom.add(Box.createRigidArea(VGAP10));
256 custom.add(fc);
257
258 Action okAction = createOKAction();
259 fc.addActionListener(okAction);
260
261 JPanel buttons = new JPanel();
262 buttons.setLayout(new BoxLayout(buttons, BoxLayout.X_AXIS));
263 buttons.add(Box.createRigidArea(HGAP10));
264 buttons.add(createImageButton(createFindAction()));
265 buttons.add(Box.createRigidArea(HGAP10));
266 buttons.add(createButton(createAboutAction()));
267 buttons.add(Box.createRigidArea(HGAP10));
268 buttons.add(createButton(okAction));
269 buttons.add(Box.createRigidArea(HGAP10));
270 buttons.add(createButton(createCancelAction()));
271 buttons.add(Box.createRigidArea(HGAP10));
272 buttons.add(createImageButton(createHelpAction()));
273 buttons.add(Box.createRigidArea(HGAP10));
274
275 custom.add(buttons);
276 custom.add(Box.createRigidArea(VGAP10));
277
278 Frame parent = (Frame) SwingUtilities.getAncestorOfClass(Frame.class, getDemoPanel());
280 dialog = new JDialog(parent, getString("FileChooserDemo.dialogtitle"), true);
281 dialog.setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
282 dialog.getContentPane().add(custom, BorderLayout.CENTER);
283 dialog.pack();
284 dialog.setLocationRelativeTo(getDemoPanel());
285 dialog.show();
286 }
287 };
288 return createButton(a);
289 }
290
291 public Action createAboutAction() {
292 return new AbstractAction(getString("FileChooserDemo.about")) {
293 public void actionPerformed(ActionEvent e) {
294 File file = fc.getSelectedFile();
295 String text;
296 if(file == null) {
297 text = getString("FileChooserDemo.nofileselected");
298 } else {
299 text = "<html>" + getString("FileChooserDemo.thefile");
300 text += "<br><font color=green>" + file.getName() + "</font><br>";
301 text += getString("FileChooserDemo.isprobably") + "</html>";
302 }
303 JOptionPane.showMessageDialog(getDemoPanel(), text);
304 }
305 };
306 }
307
308 public Action createOKAction() {
309 return new AbstractAction(getString("FileChooserDemo.ok")) {
310 public void actionPerformed(ActionEvent e) {
311 dialog.dispose();
312 if (!e.getActionCommand().equals(JFileChooser.CANCEL_SELECTION)
313 && fc.getSelectedFile() != null) {
314
315 loadImage(fc.getSelectedFile().getPath());
316 }
317 }
318 };
319 }
320
321 public Action createCancelAction() {
322 return new AbstractAction(getString("FileChooserDemo.cancel")) {
323 public void actionPerformed(ActionEvent e) {
324 dialog.dispose();
325 }
326 };
327 }
328
329 public Action createFindAction() {
330 Icon icon = createImageIcon("filechooser/find.gif", getString("FileChooserDemo.find"));
331 return new AbstractAction("", icon) {
332 public void actionPerformed(ActionEvent e) {
333 String result = JOptionPane.showInputDialog(getDemoPanel(), getString("FileChooserDemo.findquestion"));
334 if (result != null) {
335 JOptionPane.showMessageDialog(getDemoPanel(), getString("FileChooserDemo.findresponse"));
336 }
337 }
338 };
339 }
340
341 public Action createHelpAction() {
342 Icon icon = createImageIcon("filechooser/help.gif", getString("FileChooserDemo.help"));
343 return new AbstractAction("", icon) {
344 public void actionPerformed(ActionEvent e) {
345 JOptionPane.showMessageDialog(getDemoPanel(), getString("FileChooserDemo.helptext"));
346 }
347 };
348 }
349
350 class MyImageIcon extends ImageIcon {
351 public MyImageIcon(String filename) {
352 super(filename);
353 };
354 public synchronized void paintIcon(Component c, Graphics g, int x, int y) {
355 g.setColor(Color.white);
356 g.fillRect(0,0, c.getWidth(), c.getHeight());
357 if(getImageObserver() == null) {
358 g.drawImage(
359 getImage(),
360 c.getWidth()/2 - getIconWidth()/2,
361 c.getHeight()/2 - getIconHeight()/2,
362 c
363 );
364 } else {
365 g.drawImage(
366 getImage(),
367 c.getWidth()/2 - getIconWidth()/2,
368 c.getHeight()/2 - getIconHeight()/2,
369 getImageObserver()
370 );
371 }
372 }
373 }
374
375 public void loadImage(String filename) {
376 theImage.setIcon(new MyImageIcon(filename));
377 }
378
379 public JButton createButton(Action a) {
380 JButton b = new JButton(a) {
381 public Dimension getMaximumSize() {
382 int width = Short.MAX_VALUE;
383 int height = super.getMaximumSize().height;
384 return new Dimension(width, height);
385 }
386 };
387 return b;
388 }
389
390 public JButton createImageButton(Action a) {
391 JButton b = new JButton(a);
392 b.setMargin(new Insets(0,0,0,0));
393 return b;
394 }
395 }
396
397 class FilePreviewer extends JComponent implements PropertyChangeListener {
398 ImageIcon thumbnail = null;
399
400 public FilePreviewer(JFileChooser fc) {
401 setPreferredSize(new Dimension(100, 50));
402 fc.addPropertyChangeListener(this);
403 setBorder(new BevelBorder(BevelBorder.LOWERED));
404 }
405
406 public void loadImage(File f) {
407 if (f == null) {
408 thumbnail = null;
409 } else {
410 ImageIcon tmpIcon = new ImageIcon(f.getPath());
411 if(tmpIcon.getIconWidth() > 90) {
412 thumbnail = new ImageIcon(
413 tmpIcon.getImage().getScaledInstance(90, -1, Image.SCALE_DEFAULT));
414 } else {
415 thumbnail = tmpIcon;
416 }
417 }
418 }
419
420 public void propertyChange(PropertyChangeEvent e) {
421 String prop = e.getPropertyName();
422 if(prop == JFileChooser.SELECTED_FILE_CHANGED_PROPERTY) {
423 if(isShowing()) {
424 loadImage((File) e.getNewValue());
425 repaint();
426 }
427 }
428 }
429
430 public void paint(Graphics g) {
431 super.paint(g);
432 if(thumbnail != null) {
433 int x = getWidth()/2 - thumbnail.getIconWidth()/2;
434 int y = getHeight()/2 - thumbnail.getIconHeight()/2;
435 if(y < 0) {
436 y = 0;
437 }
438
439 if(x < 5) {
440 x = 5;
441 }
442 thumbnail.paintIcon(this, g, x, y);
443 }
444 }
445 }
446
447 |
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