source: osm/applications/editors/josm/plugins/routing/src/com/innovant/josm/plugin/routing/actions/MoveRouteNodeAction.java@ 14287

/*
 * Copyright (C) 2008 Innovant
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.
 *
 * For more information, please contact:
 *
 *  Innovant
 *   juangui@gmail.com
 *   vidalfree@gmail.com
 *
 *  http://public.grupoinnovant.com/blog
 *
 */

package com.innovant.josm.plugin.routing.actions;

import static org.openstreetmap.josm.tools.I18n.tr;

import java.awt.Point;
import java.awt.event.MouseEvent;
import java.util.List;

import org.apache.log4j.Logger;
import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.actions.mapmode.MapMode;
import org.openstreetmap.josm.data.osm.Node;
import org.openstreetmap.josm.data.osm.WaySegment;
import org.openstreetmap.josm.gui.MapFrame;
import org.openstreetmap.josm.tools.ImageProvider;

import com.innovant.josm.plugin.routing.RoutingLayer;
import com.innovant.josm.plugin.routing.RoutingModel;
import com.innovant.josm.plugin.routing.RoutingPlugin;
import com.innovant.josm.plugin.routing.gui.RoutingDialog;

/**
 * Accounts for the selection or unselection of the routing tool in the tool bar,
 * and the mouse events when this tool is selected
 * @author Juangui
 * @author Jose Vidal
 *
 */
public class MoveRouteNodeAction extends MapMode {
        /**
         * Serial.
         */
        private static final long serialVersionUID = 1L;

        /**
         * Square of the distance radius where route nodes can be selected for dragging
         */
        private static final int DRAG_SQR_RADIUS = 100;

        /**
         * Logger.
         */
        static Logger logger = Logger.getLogger(RoutingLayer.class);

        /**
     * Routing Model.
     */
        private RoutingModel routingModel;

        /**
         * Routing Layer.
         */
    private RoutingLayer routingLayer;

        /**
         * Routing Dialog.
         */
    private RoutingDialog routingDialog;

    /**
     * Index of dragged node
     */
    private int index;

    /**
     * Constructor
     * @param mapFrame
     */
        public MoveRouteNodeAction(MapFrame mapFrame) {
                // TODO Use constructor with shortcut
                super(tr("Routing"), "move",
                                tr("Click and drag to move route nodes."),
                                mapFrame, ImageProvider.getCursor("normal", "move"));
        this.routingLayer = RoutingPlugin.getInstance().getRoutingLayer();
        this.routingModel = routingLayer.getRoutingModel();
        this.routingDialog = RoutingPlugin.getInstance().getRoutingDialog();
        }

    @Override public void enterMode() {
        super.enterMode();
        Main.map.mapView.addMouseListener(this);
    }

    @Override public void exitMode() {
        super.exitMode();
        Main.map.mapView.removeMouseListener(this);
    }

    @Override public void mousePressed(MouseEvent e) {
        // If left button is pressed
        if (e.getButton() == MouseEvent.BUTTON1) {
                // Search for the nearest node in the list
                List<Node> nl = routingModel.getSelectedNodes();
                index = -1;
                double dmax = DRAG_SQR_RADIUS; // maximum distance, in pixels
                for (int i=0;i<nl.size();i++) {
                        Node node = nl.get(i);
                        double d = Main.map.mapView.getPoint(node.eastNorth).distanceSq(e.getPoint());
                        if (d < dmax) {
                                dmax = d;
                                index = i;
                        }
                }
                if (index>=0)
                logger.debug("Moved from node " + nl.get(index));
        }
    }

    @Override public void mouseReleased(MouseEvent e) {
        // If left button is released and a route node is being dragged
        if ((e.getButton() == MouseEvent.BUTTON1) && (index>=0)) {
                searchAndReplaceNode(e.getPoint());
        }
    }

    @Override public void mouseDragged(MouseEvent e) {
    }

    private void searchAndReplaceNode(Point point) {
        // Search for nearest highway node
        Node node = null;
        List<WaySegment> wsl = Main.map.mapView.getNearestWaySegments(point);
        for (WaySegment ws:wsl) {
                if (ws.way.get("highway")!=null) {
                        // If waysegment belongs to a highway compare the distance from
                        // both waysegment nodes to the point clicked and keep the nearest one
                        Node node0 = ws.way.nodes.get(ws.lowerIndex);
                        Node node1 = ws.way.nodes.get(ws.lowerIndex + 1);
                        double d0 = Main.map.mapView.getPoint(node0.eastNorth).distanceSq(point);
                        double d1 = Main.map.mapView.getPoint(node1.eastNorth).distanceSq(point);
                        if (d0<d1)
                                node = node0;
                        else
                                node = node1;
                        break;
                }
        }
        if (node == null) {
                logger.debug("Didn't found a close node to move to.");
            return;
        }
        logger.debug("Moved to node " + node);
        routingModel.removeNode(index);
                routingDialog.removeNode(index);
        routingModel.insertNode(index, node);
                routingDialog.insertNode(index,node.id+" ["+node.coor.toDisplayString()+"]");
        Main.map.repaint();
    }
}