/*
 * SimplyHTML, a word processor based on Java, HTML and CSS
 * Copyright (C) 2002 Ulrich Hilger
 *
 * 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.
 *
 * 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.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

package com.lightdev.app.shtm;


import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.prefs.*;

/**
 * Dialog to set user preferences for application SimplyHTML.
 *
 * @author Ulrich Hilger
 * @author Light Development
 * @author <a href="http://www.lightdev.com">http://www.lightdev.com</a>
 * @author <a href="mailto:info@lightdev.com">info@lightdev.com</a>
 * @author published under the terms and conditions of the
 *      GNU General Public License,
 *      for details see file gpl.txt in the distribution
 *      package of this software
 *
 * 
 */

class PrefsDialog extends DialogShell implements ActionListener {

  /** the look and feels avaliable in the system */
  private UIManager.LookAndFeelInfo[] lfinfo;

  /** reference for user preferences for this class */
  protected Preferences prefs = Preferences.userNodeForPackage( getClass() );

  /** constant for dock location setting in preferences file */
  public static final String PREFSID_LOOK_AND_FEEL = "Laf";

  public static final String PREFS_USE_STD_STYLE_SHEET = "use_std_styles";


  private String lafName = UIManager.getLookAndFeel().getName();

  private JComboBox lafCombo;
  private JCheckBox useStdStyleSheet;

  /** the help id for this dialog */
  private static final String helpTopicId = "item167";

  public PrefsDialog(Frame parent, String title) {
    super(parent, title, helpTopicId);

    // have a grid bag layout ready to use
    GridBagLayout g = new GridBagLayout();
    GridBagConstraints c = new GridBagConstraints();

    JPanel layoutPanel = new JPanel(g);

    // build a panel for preferences related to the application
    JPanel appPrefsPanel = new JPanel(g);
    Util.addGridBagComponent(
        appPrefsPanel,
        new JLabel(
        Util.getResourceString(
        "prfLafLabel")),
        g, c, 0, 0, GridBagConstraints.EAST);
    lafCombo = new JComboBox();
    initLfComboBox();
    Util.addGridBagComponent(
        appPrefsPanel,
        lafCombo,
        g, c, 1, 0, GridBagConstraints.EAST);

    // build a panel for preferences related to documents
    /*
    JPanel docPrefsPanel = new JPanel(g);
    Util.addGridBagComponent(docPrefsPanel,
                             new JCheckBox(
                             FrmMain.dynRes.getResourceString(
                             FrmMain.resources, "prfShareDocResourcesLabel")),
                             g, c, 0, 1,
                             GridBagConstraints.EAST);
    */


    Util.addGridBagComponent(layoutPanel, appPrefsPanel, g, c, 0, 0, GridBagConstraints.WEST);

    // add option for standard stlye sheet
    useStdStyleSheet = new JCheckBox(Util.getResourceString("linkDefaultStyleSheetLabel"));
    boolean useStyle = prefs.getBoolean(PrefsDialog.PREFS_USE_STD_STYLE_SHEET, false);
    useStdStyleSheet.setSelected(useStyle);
    Util.addGridBagComponent(layoutPanel, useStdStyleSheet, g, c, 0, 2, GridBagConstraints.WEST);

    // add to content pane of DialogShell
    Container contentPane = super.getContentPane();
    contentPane.add(layoutPanel, BorderLayout.CENTER);
    //contentPane.add(appPrefsPanel, BorderLayout.NORTH);
    //contentPane.add(docPrefsPanel, BorderLayout.CENTER);

    // cause optimal placement of all elements
    pack();
  }

  private void initLfComboBox() {
    lfinfo = UIManager.getInstalledLookAndFeels();
    int count = lfinfo.length;
    String[] lfNames = new String[count];
    for(int i=0; i<count; i++) {
      lfNames[i] = lfinfo[i].getName();
    }
    lafCombo.setModel(new DefaultComboBoxModel(lfNames));
    lafCombo.setSelectedItem(lafName);
  }

  /**
   * implements the ActionListener interface to be notified of
   * clicks onto the ok and cancel button.
   */
  public void actionPerformed(ActionEvent e) {
      Component src = (Component)e.getSource();
      if(src == okButton) {
        savePrefs(src);
      }
      super.actionPerformed(e);
  }

  private void savePrefs(final Component src) {
    try {
      String newLaf = lfinfo[lafCombo.getSelectedIndex()].getClassName();
      if(!lafName.equalsIgnoreCase(newLaf)) {
        prefs.put(PREFSID_LOOK_AND_FEEL, newLaf);
        UIManager.setLookAndFeel(newLaf);
        SwingUtilities.updateComponentTreeUI(JOptionPane.getFrameForComponent(src));
      }
      prefs.putBoolean(PREFS_USE_STD_STYLE_SHEET, useStdStyleSheet.isSelected());
    }
    catch(Exception ex) {
      Util.errMsg(this, ex.getMessage(), ex);
    }
  }
}