CharacterSetAccessory.java

/*
 * @(#)CharacterSetAccessory.java
 *
 * Copyright (c) 2005 The authors and contributors of JHotDraw.
 * You may not use, copy or modify this file, except in compliance with the
 * accompanying license terms.
 */
package org.jhotdraw.samples.teddy;

import org.jhotdraw.gui.*;
import java.nio.charset.*;
import javax.swing.*;
import java.util.*;
import java.util.prefs.*;
import org.jhotdraw.util.prefs.PreferencesUtil;

/**
 * CharacterSetAccessory.
 *
 * @author Werner Randelshofer
 * @version $Id$
 */
public class CharacterSetAccessory extends javax.swing.JPanel {
    private static final long serialVersionUID = 1L;

    private static final Preferences prefs = PreferencesUtil.userNodeForPackage(TeddyView.class);
    private static Object[] availableCharSets;

    /** Creates a new instance. */
    public CharacterSetAccessory() {
        if ("aqua".equals(UIManager.getLookAndFeel().getID().toLowerCase())) {
            initComponents();
        } else {
            initComponentsWin();
        }

        String selectedItem = prefs.get("characterSet", "UTF-8");
        charSetCombo.setModel(new DefaultComboBoxModel(new String[]{selectedItem}));
        charSetCombo.setSelectedItem(selectedItem);
        charSetCombo.setEnabled(false);
        fetchAvailableCharSets();

        String lineSeparator = prefs.get("lineSeparator", "\n");
        if ("\r".equals(lineSeparator)) {
            lineSepCombo.setSelectedIndex(0);
        } else if ("\n".equals(lineSeparator)) {
            lineSepCombo.setSelectedIndex(1);
        } else if ("\r\n".equals(lineSeparator)) {
            lineSepCombo.setSelectedIndex(2);
        }
    }

    public void fetchAvailableCharSets() {
        if (availableCharSets == null) {
            new BackgroundTask() {

                @Override
                public void construct() {
                    SortedMap<String, Charset> sm = Charset.availableCharsets();
                    LinkedList<String> list = new LinkedList<String>();
                    for (String key : sm.keySet()) {
                        if (!key.startsWith("x-")) {
                            list.add(key);
                        }
                    }
                    availableCharSets = list.toArray();
                    Arrays.sort(availableCharSets);
                }

                @Override
                public void finished() {
                    Object selectedItem = charSetCombo.getSelectedItem();
                    charSetCombo.setModel(new DefaultComboBoxModel(availableCharSets));
                    charSetCombo.setSelectedItem(selectedItem);
                    charSetCombo.setEnabled(true);
                }
            }.start();
        } else {
            Object selectedItem = charSetCombo.getSelectedItem();
            charSetCombo.setModel(new DefaultComboBoxModel(availableCharSets));
            charSetCombo.setSelectedItem(selectedItem);
            charSetCombo.setEnabled(true);
        }
    }

    public String getCharacterSet() {
        prefs.put("characterSet", (String) charSetCombo.getSelectedItem());
        return (String) charSetCombo.getSelectedItem();
    }

    public String getLineSeparator() {
        String lineSeparator;
        switch (charSetCombo.getSelectedIndex()) {
            case 0:
            default:
                lineSeparator = "\n";
                break;
            case 1:
                lineSeparator = "\r";
                break;
            case 2:
                lineSeparator = "\r\n";
                break;
        }
        prefs.put("lineSeparator", lineSeparator);
        return lineSeparator;
    }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        charSetLabel = new javax.swing.JLabel();
        charSetCombo = new javax.swing.JComboBox();
        lineSepLabel = new javax.swing.JLabel();
        lineSepCombo = new javax.swing.JComboBox();

        setBorder(javax.swing.BorderFactory.createTitledBorder(""));

        charSetLabel.setText("Character Set:");

        charSetCombo.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Item 1", "Item 2", "Item 3", "Item 4" }));

        lineSepLabel.setText("Line Separator:");

        lineSepCombo.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "CR", "LF", "CR LF" }));

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(charSetLabel)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(charSetCombo, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(lineSepLabel)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(lineSepCombo, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(charSetLabel)
                    .addComponent(charSetCombo, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(lineSepLabel)
                    .addComponent(lineSepCombo, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap())
        );
    }// </editor-fold>//GEN-END:initComponents

    private void initComponentsWin() {
        charSetLabel = new javax.swing.JLabel();
        charSetCombo = new javax.swing.JComboBox();
        lineSepLabel = new javax.swing.JLabel();
        lineSepCombo = new javax.swing.JComboBox();

        setBorder(javax.swing.BorderFactory.createTitledBorder(""));
        charSetLabel.setText("Character Set:");

        charSetCombo.setModel(new javax.swing.DefaultComboBoxModel(new String[]{"Item 1", "Item 2", "Item 3", "Item 4"}));

        lineSepLabel.setText("Line Separator:");

        lineSepCombo.setModel(new javax.swing.DefaultComboBoxModel(new String[]{"CR", "LF", "CR LF"}));

        GroupLayout layout = new GroupLayout(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(
                layout.createParallelGroup(GroupLayout.Alignment.LEADING).addComponent(charSetLabel).addComponent(charSetCombo, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE).addComponent(lineSepLabel).addComponent(lineSepCombo, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE));
        layout.setVerticalGroup(
                layout.createSequentialGroup().addComponent(charSetLabel).addComponent(charSetCombo, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE).addPreferredGap(LayoutStyle.ComponentPlacement.UNRELATED).addComponent(lineSepLabel).addComponent(lineSepCombo, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE));
    }
    // Variables declaration - do not modify//GEN-BEGIN:variables
    public javax.swing.JComboBox charSetCombo;
    public javax.swing.JLabel charSetLabel;
    public javax.swing.JComboBox lineSepCombo;
    public javax.swing.JLabel lineSepLabel;
    // End of variables declaration//GEN-END:variables
}