ArtisPrefsDialog.java

package org.pegadi.artis;

import org.pegadi.swing.AbstractPreferencesDialog;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.swing.*;
import javax.swing.border.Border;
import java.awt.*;
import java.util.Properties;
import java.util.ResourceBundle;

public class ArtisPrefsDialog extends AbstractPreferencesDialog {

    Logger log = LoggerFactory.getLogger(getClass());

    static final String AUTO_SAVE_PREF = "auto-save";
    static ResourceBundle strings = ResourceBundle.getBundle("org.pegadi.artis.PrefsDialogStrings");

    private JComboBox saveIntervals;

    public ArtisPrefsDialog(JFrame parent, Properties preferences) {
        super(parent, preferences);
        Dimension size = Toolkit.getDefaultToolkit().getScreenSize();
        int x = Math.min(((size.width / 5) *4), 810);
        int y = Math.min(((size.height / 5) *4), 600);
        this.setLocation((size.width - x) / 2, (size.height - y) / 2);
    }


    protected Component createPreferencesPane() {
        Box prefsPane = new Box(BoxLayout.Y_AXIS);

        JPanel autoSavePanel = createAutoSavePanel();
        prefsPane.add(autoSavePanel);

        return prefsPane;
    }

    private JPanel createAutoSavePanel() {
        JPanel autoSavePanel = new JPanel(new FlowLayout());
        Border border = BorderFactory.createTitledBorder("Auto-save");
        autoSavePanel.setBorder(border);
        JLabel autoSaveLabel = new JLabel(strings.getString("autoSaveLabel"));
        saveIntervals = new JComboBox();
        for(int i=2; i<20; i+=2) {
            saveIntervals.addItem(i);
        }

        autoSavePanel.add(autoSaveLabel);
        autoSavePanel.add(saveIntervals);

        return autoSavePanel;
    }


    public void setPreferences(Properties preferences) {
        this.prefs = preferences;

        Integer selected;
        try {
            selected = Integer.parseInt(preferences.getProperty(AUTO_SAVE_PREF));
        } catch (IllegalArgumentException e){
            selected = 10;
            log.debug("Error setting auto save interval", e);
        }
        saveIntervals.setSelectedItem(selected);
    }


    protected void findChangedPreferences() {
        changedPrefs = new Properties();
        if(autoSaveChanged()) {
            changedPrefs.put(AUTO_SAVE_PREF, saveIntervals.getSelectedItem().toString());          
        }

    }

    private boolean autoSaveChanged() {
        Integer newAutosave = (Integer) saveIntervals.getSelectedItem();
        Integer prefsAutosave;
        try {
            prefsAutosave = Integer.parseInt(prefs.getProperty(AUTO_SAVE_PREF));
        } catch(NumberFormatException e) {
            prefsAutosave = -1;
        }
        if(!newAutosave.equals(prefsAutosave)) {
            return true;
        }
        else {
            return false;
        }
    }
}