/*
* Beryl - A web platform based on XML, XSLT and Java
* This file is part of the Beryl XML GUI
*
* Copyright (C) 2004 Wenzel Jakob <wazlaf@tigris.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This program 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-3107 USA
*/
package org.beryl.gui;
import java.io.File;
import java.io.FilenameFilter;
import javax.swing.JFileChooser;
import javax.swing.filechooser.FileFilter;
import org.beryl.gui.widgets.Dialog;
import org.beryl.gui.widgets.Frame;
import org.beryl.gui.widgets.Label;
public class DialogUtils {
public static final int RESULT_YES = 0;
public static final int RESULT_NO = 1;
public static final int RESULT_CANCEL = 2;
/**
* Display a file open dialog
* @param extension The file extension to look for
*/
public static File showOpenFileDialog(Widget parent, String extension) {
JFileChooser chooser = new JFileChooser();
chooser.setFileFilter(new ExtensionFilter(extension, true));
if (chooser.showOpenDialog(parent.getRealWidget()) == JFileChooser.APPROVE_OPTION) {
return chooser.getSelectedFile();
} else {
return null;
}
}
/**
* Display a file save dialog
* @param extension The file extension of the destination file
*/
public static File showSaveFileDialog(Widget parent, String extension) {
JFileChooser chooser = new JFileChooser();
chooser.setFileFilter(new ExtensionFilter(extension, true));
if (chooser.showSaveDialog(parent.getRealWidget()) == JFileChooser.APPROVE_OPTION) {
String path = chooser.getSelectedFile().getPath();
if (!path.endsWith("." + extension))
path = path + "." + extension;
return new File(path);
} else {
return null;
}
}
private static class YesNoCancelEventListener implements GUIEventListener {
private int result = RESULT_CANCEL;
public void eventOccured(GUIEvent event) {
String name = event.getName();
if (name.equals("yes"))
result = RESULT_YES;
else if (name.equals("no"))
result = RESULT_NO;
else if (name.equals("cancel"))
result = RESULT_CANCEL;
((Dialog) event.getSource().getParentWidgetByClass(Dialog.class)).dispose();
}
public int getResult() {
return result;
}
};
/**
* Show a dialog with a yes/no/cancel button
* @param frame The parent frame
* @param title The dialog title
* @param message The dialog message
* @return The result (RESULT_YES/RESULT_NO/RESULT_CANCEL)
*/
public static int showYesNoCancelDialog(Frame frame, String title, String message) throws GUIException {
YesNoCancelEventListener listener = new YesNoCancelEventListener();
Dialog dialog = (Dialog) WidgetFactory.getInstance().constructWidget(DialogUtils.class, "YesNoCancelDialog", listener);
Label label = (Label) dialog.getWidget("DialogCaption");
label.setProperty("text", message);
dialog.initDialog(frame);
dialog.setProperty("title", title);
dialog.show();
return listener.getResult();
}
/**
* A filter class which removes every file except
* (optionally) directories and files with a given extension
*/
public static class ExtensionFilter extends FileFilter implements FilenameFilter {
private String extension = null;
private boolean directories = false;
public ExtensionFilter(String extension, boolean directories) {
this.extension = "." + extension;
this.directories = directories;
}
public boolean accept(File file) {
return file.getName().endsWith(extension) || (directories && file.isDirectory());
}
public boolean accept(File file, String name) {
file = new File(name);
return file.getName().endsWith(extension) || (directories && file.isDirectory());
}
public String getDescription() {
return "*" + extension;
}
}
}