source: trunk/gli/src/org/greenstone/gatherer/gui/EditorDialog.java@ 7183

/**
 *#########################################################################
 *
 * A component of the Gatherer application, part of the Greenstone digital
 * library suite from the New Zealand Digital Library Project at the
 * University of Waikato, New Zealand.
 *
 * <BR><BR>
 *
 * Author: John Thompson, Greenstone Digital Library, University of Waikato
 *
 * <BR><BR>
 *
 * Copyright (C) 1999 New Zealand Digital Library Project
 *
 * <BR><BR>
 *
 * This program 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.
 *
 * <BR><BR>
 *
 * 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 General Public License for more details.
 *
 * <BR><BR>
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *########################################################################
 */
package org.greenstone.gatherer.gui;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import org.greenstone.gatherer.Dictionary;
import org.greenstone.gatherer.Gatherer;
import org.greenstone.gatherer.gui.GLIButton;
import org.greenstone.gatherer.gui.SimpleMenuBar;
import org.greenstone.gatherer.gui.ModalDialog;

/** A class that extends a JDialog into a editor for editing large block of text for the metadata value.
 * @author John Thompson, Greenstone Digital Library, University of Waikato
 * @version 2.3
 */
final public class EditorDialog
    extends ModalDialog 
    implements ActionListener {
   /** Is this dialog editable? */
   private boolean editable = true;
   /** The cancel, and I don't want the text I've typed, button. */
    private JButton cancel = null;
    /** The ok, I'll save what I've just typed in, button. */
    private JButton ok = null;
    /** The area in which we type. */
    private JTextArea text = null;
    /** And what result should be passed back to our caller. */
    private String result = null;
    /** The size of the edit pop-up. */
    final static private Dimension SIZE = new Dimension(400,425);

    /** Constructor */
    public EditorDialog() {
    super(Gatherer.g_man);
    }

    /** Any implementation of ActionListener must include this method so we can be informed when an action has been performed on one of our target controls. In this case we generate a pop-up window to edit in.
     * @param event An <strong>ActionEvent</strong> containing information about the event.
     */
    public void actionPerformed(ActionEvent event) {
    if (event.getSource() == ok) {
        result = text.getText();
    }
    dispose();
    }

    /** Method to display the editing box on screen.
     * @param value The initial text to be displayed in the editing area, as a <strong>String</strong>.
     * @return The new value for the metadata value as a <strong>String</strong> or <i>null</i> if the user has pressed cancel.
     */
    public String display(String value) {
    setModal(true);
    setSize(SIZE);
    setJMenuBar(new SimpleMenuBar("theenrichview"));
    Dictionary.setText(this, "General.Edit");

    // Create
    text = new JTextArea(value);
    text.setCaretPosition(value.length());
    text.setEditable(editable);
    text.setLineWrap(true);
    text.setWrapStyleWord(false);
    Dictionary.setTooltip(text, "MetaEdit.Value_Field_Tooltip");

    cancel = new GLIButton();
    cancel.setMnemonic(KeyEvent.VK_C);
    Dictionary.setBoth(cancel, "General.Cancel", "General.Pure_Cancel_Tooltip");
    ok = new GLIButton();
    ok.setMnemonic(KeyEvent.VK_O);
    Dictionary.setBoth(ok, "General.OK", "General.OK_Tooltip");

    // Listeners
    cancel.addActionListener(this);
    ok.addActionListener(this);

    // Layout
    JPanel button_pane = new JPanel();
    button_pane.setLayout(new GridLayout(1,2));
    if(editable) {
       button_pane.add(ok);
       button_pane.add(cancel);
    }
    else {
       button_pane.add(new JPanel());
       button_pane.add(ok);
    }
          
    JPanel content_pane = (JPanel) getContentPane();
    content_pane.setLayout(new BorderLayout());
    content_pane.add(new JScrollPane(text), BorderLayout.CENTER);
    content_pane.add(button_pane, BorderLayout.SOUTH);
          
    Dimension screen_size = Gatherer.config.screen_size;
    setLocation((screen_size.width - SIZE.width) / 2, (screen_size.height - SIZE.height) / 2);
    setVisible(true);
    return result;
    }

   /** Specify if this text dialog should be editable or readonly
    * @param editable true to allow editing, false otherwise
    */
   public void setEditable(boolean editable) {
      if(text == null) {
     this.editable = editable;
      }
      else {
     text.setEditable(editable);
      }
   }
}