// **********************************************************************// // <copyright>// //  BBN Technologies//  10 Moulton Street//  Cambridge, MA 02138//  (617) 873-8000// //  Copyright (C) BBNT Solutions LLC. All rights reserved.// // </copyright>// **********************************************************************// // $Source: /cvs/distapps/openmap/src/openmap/com/bbn/openmap/examples/simple/RouteLayer.java,v $// $RCSfile: RouteLayer.java,v $// $Revision: 1.2.2.1 $// $Date: 2004/10/14 18:26:48 $// $Author: dietrick $// // **********************************************************************package com.bbn.openmap.examples.simple;import java.awt.Color;import com.bbn.openmap.Layer;import com.bbn.openmap.omGraphics.OMGraphic;import com.bbn.openmap.omGraphics.OMGraphicList;import com.bbn.openmap.omGraphics.OMLine;import com.bbn.openmap.event.ProjectionEvent;/** * A Layer to display hypothetical transportation routes. * <p> * This example shows: * <ul> * <li>OMGraphicList use * <li>OMLine use * </ul> */public class RouteLayer extends Layer {    /**     * A list of graphics to be painted on the map.     */    private OMGraphicList omgraphics;    /**     * Construct a default route layer. Initializes omgraphics to a     * new OMGraphicList, and invokes createGraphics to create the     * canned list of routes.     */    public RouteLayer() {        omgraphics = new OMGraphicList();        createGraphics(omgraphics);    }    /**     * Creates an OMLine from the given parameters.     *      * @param lat1 The line's starting latitude     * @param lon1 The line's starting longitude     * @param lat2 The line's ending latitude     * @param lon2 The line's ending longitude     * @param color The line's color     *      * @return An OMLine with the given properties     */    public OMLine createLine(float lat1, float lon1, float lat2, float lon2,                             Color color) {        OMLine line = new OMLine(lat1, lon1, lat2, lon2, OMGraphic.LINETYPE_GREATCIRCLE);        line.setLinePaint(color);        return line;    }    /**     * Clears and then fills the given OMGraphicList. Creates three     * lines for display on the map.     *      * @param graphics The OMGraphicList to clear and populate     * @return the graphics list, after being cleared and filled     */    public OMGraphicList createGraphics(OMGraphicList graphics) {        graphics.clear();        graphics.addOMGraphic(createLine(42.0f,                -71.0f,                35.5f,                -120.5f,                Color.red));        graphics.addOMGraphic(createLine(28.0f,                -81.0f,                47.0f,                -122.0f,                Color.green));        graphics.addOMGraphic(createLine(22.6f,                -101.0f,                44.0f,                -70.0f,                Color.blue));        return graphics;    }    //----------------------------------------------------------------------    // Layer overrides    //----------------------------------------------------------------------    /**     * Renders the graphics list. It is important to make this routine     * as fast as possible since it is called frequently by Swing, and     * the User Interface blocks while painting is done.     */    public void paint(java.awt.Graphics g) {        omgraphics.render(g);    }    //----------------------------------------------------------------------    // ProjectionListener interface implementation    //----------------------------------------------------------------------    /**     * Handler for <code>ProjectionEvent</code>s. This function is     * invoked when the <code>MapBean</code> projection changes. The     * graphics are reprojected and then the Layer is repainted.     * <p>     *      * @param e the projection event     */    public void projectionChanged(ProjectionEvent e) {        omgraphics.project(e.getProjection(), true);        repaint();    }}