/**
* Checks whether the given window is either a FileDialog, or contains a JFileChooser component.
* If so, its current directory is stored in the given properties.
*
* @param aNamespace the name space to use;
* @param aProperties the properties to store the found directory in;
* @param aWindow the window to check for.
*/
private static void loadFileDialogState(final Preferences aProperties, final Window aWindow) {
final String propKey = "lastDirectory";
if (aWindow instanceof FileDialog) {
final String dir = aProperties.get(propKey, null);
if (dir != null) {
((FileDialog) aWindow).setDirectory(dir);
}
} else if (aWindow instanceof JDialog) {
final Container contentPane = ((JDialog) aWindow).getContentPane();
final JFileChooser fileChooser =
(JFileChooser) findComponent(contentPane, JFileChooser.class);
if (fileChooser != null) {
final String dir = aProperties.get(propKey, null);
if (dir != null) {
fileChooser.setCurrentDirectory(new File(dir));
}
}
}
}
/**
* Shows a file-open selection dialog for the given working directory.
*
* @param aOwner the owning window to show the dialog in;
* @param aCurrentDirectory the working directory to start the dialog in, can be <code>null</code>
* .
* @return the selected file, or <code>null</code> if the user aborted the dialog.
*/
public static final File showFileOpenDialog(
final Window aOwner,
final String aCurrentDirectory,
final javax.swing.filechooser.FileFilter... aFileFilters) {
if (HostUtils.isMacOS()) {
final FileDialog dialog;
if (aOwner instanceof Dialog) {
dialog = new FileDialog((Dialog) aOwner, "Open file", FileDialog.LOAD);
} else {
dialog = new FileDialog((Frame) aOwner, "Open file", FileDialog.LOAD);
}
dialog.setDirectory(aCurrentDirectory);
if ((aFileFilters != null) && (aFileFilters.length > 0)) {
dialog.setFilenameFilter(new FilenameFilterAdapter(aFileFilters));
}
try {
dialog.setVisible(true);
final String selectedFile = dialog.getFile();
return selectedFile == null ? null : new File(dialog.getDirectory(), selectedFile);
} finally {
dialog.dispose();
}
} else {
final JFileChooser dialog = new JFileChooser();
dialog.setCurrentDirectory((aCurrentDirectory == null) ? null : new File(aCurrentDirectory));
for (javax.swing.filechooser.FileFilter filter : aFileFilters) {
dialog.addChoosableFileFilter(filter);
}
File result = null;
if (dialog.showOpenDialog(aOwner) == JFileChooser.APPROVE_OPTION) {
result = dialog.getSelectedFile();
}
return result;
}
}