source: josm/src/org/openstreetmap/josm/actions/mapmode/MapMode.java@ 101

package org.openstreetmap.josm.actions.mapmode;

import java.awt.Cursor;
import java.awt.event.ActionEvent;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;

import javax.swing.KeyStroke;

import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.actions.JosmAction;
import org.openstreetmap.josm.gui.MapFrame;
import org.openstreetmap.josm.tools.ImageProvider;

/**
 * A class implementing MapMode is able to be selected as an mode for map editing.
 * As example scrolling the map is a MapMode, connecting Nodes to new Segments
 * is another.
 * 
 * MapModes should register/deregister all necessary listener on the map's view
 * control. 
 */
abstract public class MapMode extends JosmAction implements MouseListener, MouseMotionListener {

//      private final Cursor cursor;
//      private Cursor oldCursor;

        /**
         * Constructor for mapmodes without an menu
         */
        public MapMode(String name, String iconName, String tooltip, String keyname, int keystroke, MapFrame mapFrame, Cursor cursor) {
                super(name, "mapmode/"+iconName, tooltip, keyname, KeyStroke.getKeyStroke(keystroke, 0));
//              this.cursor = cursor;
                putValue("active", false);
        }

        /**
         * Constructor for mapmodes with an menu (no shortcut will be registered)
         */
        public MapMode(String name, String iconName, String tooltip, MapFrame mapFrame, Cursor cursor) {
                putValue(NAME, name);
                putValue(SMALL_ICON, ImageProvider.get("mapmode", iconName));
                putValue(SHORT_DESCRIPTION, tooltip);
//              this.cursor = cursor;
        }

        public void enterMode() {
                putValue("active", true);
//              oldCursor = Main.map.mapView.getCursor();
//              Main.map.mapView.setCursor(cursor);
                
        }
        public void exitMode() {
                putValue("active", false);
//              Main.map.mapView.setCursor(oldCursor);
        }

        /**
         * Call selectMapMode(this) on the parent mapFrame.
         */
        public void actionPerformed(ActionEvent e) {
                Main.map.selectMapMode(this);
        }

        public void mouseReleased(MouseEvent e) {}
        public void mouseExited(MouseEvent e) {}
        public void mousePressed(MouseEvent e) {}
        public void mouseClicked(MouseEvent e) {}
        public void mouseEntered(MouseEvent e) {}
        public void mouseMoved(MouseEvent e) {}
        public void mouseDragged(MouseEvent e) {}
}