org.anc.ui.FileChooserButton Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of common Show documentation
Common utility classes used in most ANC projects.
The newest version!
/*-
 * Copyright 2009 The American National Corpus
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */
package org.anc.ui;

import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;

import javax.swing.JButton;
import javax.swing.JFileChooser;
import javax.swing.JTextField;

/**
 * A button that displays a JFileChooser object when clicked. The JFileChooser
 * to use can be specified in the constructor, or if none is specified a
 * JFileChooser object will be created the first time the button is clicked and
 * cached for further usages.
 * 
 * The FileChooserButton can also have a JTextField associated with it. If there
 * is an associated JTextField the contents of the field will be used to set the
 * current directory of the JFileChooser before displaying it (if the text field
 * contains a valid path) and the text field will be updated with the path to
 * the selected file if the JFileChooser is accepted.
 * 
 * @author Keith Suderman
 * 
 */
public class FileChooserButton extends JButton implements ActionListener
{
   protected Component parent;
   protected JTextField field;
   protected JFileChooser chooser;
   protected String title;
   
   public FileChooserButton(Component parent, JTextField field)
   {
      this(parent, field, null, "Save");
   }

   public FileChooserButton(Component parent, JTextField field,
         JFileChooser chooser, String title)
   {
      super("...");
      this.parent = parent;
      this.field = field;
      this.chooser = chooser;
      this.title = title;
      this.addActionListener(this);
   }

   public void setFileChooserButtonText(String text)
   {
      this.title = text;
   }
   
   @Override
   public void actionPerformed(ActionEvent e)
   {
      if (chooser == null)
      {
         chooser = new JFileChooser();
         chooser.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
      }

      File file = new File(field.getText());
      if (file.exists())
      {
         chooser.setSelectedFile(file);
      }

      if (chooser.showDialog(parent, title) == JFileChooser.APPROVE_OPTION)
      {
         field.setText(chooser.getSelectedFile().getAbsolutePath());
      }
   }
}