source: josm/src/org/openstreetmap/josm/gui/IconToggleButton.java@ 8

package org.openstreetmap.josm.gui;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.swing.Action;
import javax.swing.JComponent;
import javax.swing.JToggleButton;

/**
 * Just a toggle button, with smaller border and icon only to display in
 * MapFrame toolbars.
 *
 * @author imi
 */
public class IconToggleButton extends JToggleButton implements PropertyChangeListener {

        /**
         * Construct the toggle button with the given action.
         */
        public IconToggleButton(JComponent acceleratorReceiver, Action action) {
                super(action);
                setText(null);
                
                // Tooltip
                String toolTipText = "";
                Object o = action.getValue(Action.LONG_DESCRIPTION);
                if (o != null)
                        toolTipText += o.toString();
                o = action.getValue(Action.ACCELERATOR_KEY);
                if (o != null) {
                        String ksName = o.toString();
                        if (ksName.startsWith("pressed "))
                                ksName = ksName.substring("pressed ".length());
                        else if (ksName.startsWith("released "))
                                ksName = ksName.substring("released ".length());
                        toolTipText += " Shortcut: "+ksName;
                }
                setToolTipText(toolTipText);
                
                action.addPropertyChangeListener(this);
        }

        public void propertyChange(PropertyChangeEvent evt) {
                if (evt.getPropertyName().equals("active"))
                        setSelected((Boolean)evt.getNewValue());
        }
}