source: josm/src/org/openstreetmap/josm/gui/dialogs/ToggleDialog.java@ 81

package org.openstreetmap.josm.gui.dialogs;

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;

import javax.swing.AbstractButton;
import javax.swing.BorderFactory;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.KeyStroke;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.actions.JosmAction;

/**
 * This class is a toggle dialog that can be turned on and off. It is attached
 * to a ButtonModel.
 * 
 * @author imi
 */
public class ToggleDialog extends JPanel {

        /**
         * The action to toggle this dialog.
         */
        public JosmAction action;
        
        /**
         * Create a new ToggleDialog.
         * @param title The title of the dialog.
     * @param prefName Name of the base preference setting string (prefix)
     *      with the final . (e.g.: "layerlist.")
         */
        public ToggleDialog(String title, String name, String iconName, String tooltip, String shortCutName, int shortCut, final String prefName) {
                action = new JosmAction(name, "dialogs/"+iconName, tooltip, "Alt-"+shortCutName, KeyStroke.getKeyStroke(shortCut, KeyEvent.ALT_MASK)){
                        public void actionPerformed(ActionEvent e) {
                                boolean show = !isVisible();
                                if (e != null && e.getSource() instanceof AbstractButton)
                                        show = ((AbstractButton)e.getSource()).isSelected();
                                setVisible(show);
                Main.pref.put(prefName+"visible", show);
                        }
                };
                setLayout(new BorderLayout());
                add(new JLabel(title), BorderLayout.NORTH);
                setVisible(false);
                setBorder(BorderFactory.createEtchedBorder());
                if (Main.pref.getBoolean(prefName+"visible")) {
                    EventQueue.invokeLater(new Runnable(){
                        public void run() {
                                action.putValue("active", true);
                            action.actionPerformed(null);
                        }
                    });
        }
        }
}