webgis.java

MapXtreme for java,MapInfo公司的地图引擎。

package mycwebgis;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.beans.*;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.text.NumberFormat;
import javax.swing.*;
import com.mapinfo.beans.layercontrol.LayerControl;
import com.mapinfo.beans.vmapj.VisualMapJ;
import com.mapinfo.beans.tools.MapToolBar;
import com.mapinfo.beans.tools.RadiusSelectionMapTool;
import com.mapinfo.beans.tools.ViewEntireLayer;
import com.mapinfo.beans.vmapj.RendererParams;
import com.mapinfo.beans.vmapj.ZoomPanel;
import com.mapinfo.beans.theme.AddTheme;
import com.mapinfo.beans.legend.*;
import com.mapinfo.unit.LinearUnit;
import com.mapinfo.util.DoublePoint;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2007</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */


public class MYCWebGis extends JApplet implements ActionListener,
        PropertyChangeListener {
    boolean isStandalone = false;
    BorderLayout borderLayout1 = new BorderLayout();

    // Declare visual beans used in the GUI
    VisualMapJ m_visualMapJ = new VisualMapJ();
    MapToolBar m_mapToolBar = new MapToolBar();
    ZoomPanel m_zoomPanel = new ZoomPanel();
    ViewEntireLayer m_viewEntire = new ViewEntireLayer();

    // Declare objects used to create thematic shading and legend
    AddTheme m_addTheme = new AddTheme();
    LegendContainer m_legendContainer = new LegendContainer();

    // Define a label that will display the current radius when
    // the user selects and drags with the Radius Select tool
    JLabel m_lblRadius;

    // A button the user can click to display the Add Theme wizard.
    JButton m_btnAddTheme;

    // A panel used to show/hide thematic user-interface elements
    JPanel m_panelTheme;

    // A button the user can click to show/hide the Thematic panel.
    JButton m_btnShowHide;

    // A boolean to remember whether the Thematic panel is currently visible.
    boolean m_bThemesVisible;

    // A number formatter object, used with the RadiusSelect tool
    NumberFormat m_nf = null;

    // TODO: You may want to assign the following URL string, to make it match
    // the URL you are using as your MapXtremeServlet service, such as:
    //   m_mapxtremeURL = "http://localhost:8080/mapxtreme480/mapxtreme";
    // Or, instead of specifying the URL explicitly here, you can specify it
    // in the HTML page that loads the applet (using the 'mapxtremeurl' param).
    // If you do not assign it here or in the html page, this applet will
    // attempt to build a MapXtreme URL dynamically, using the host and port
    // of the applet; however, that method may not be reliable, depending on
    // how your server contexts are configured.
    static String m_mapxtremeURL = "http://192.168.0.36:8080/mapxtreme480/mapxtreme";

    // TODO: Specify a map file name such as "uk.mdf" (if the mdf file is in
    // in same directory that the applet was loaded from),
    // or an URL to a map file, such as "http://host.com/maps/uk.mdf".
    // Or, instead of specifying this URL explicitly here, you can specify it
    // in the HTML page that loads the applet (using the 'filetoload' param).
    static String m_fileToLoad = "asia.mdf";

    static final boolean m_Debug = false; // to print debugging messages, set to true

    // define a boolean flag, to prevent displaying two Add Theme wizards at once
    boolean m_bDialogActive = false;

    String m_addThemeLabel = "Add theme..."; // a static label displayed in the applet
    String m_radiusLabel = "Radius:"; // a static label displayed in the applet


    //Get a parameter value
    public String getParameter(String key, String def) {
        return isStandalone ? System.getProperty(key, def) :
                (getParameter(key) != null ? getParameter(key) : def);
    }

    //Construct the applet
    public MYCWebGis() {
    }

    public void start() {
        // Use this method if you want to do any work
        // that should be executed after the init method.

        // Load a remote map definition file, if one was specified.
        // m_fileToLoad might contain a map definition file name such as
        // "http://www.mycompany.com/maps/world.mdf"
        // or just a filename, such as "world.mdf", in which case we will
        // assume the file is in the same directory as the html page which
        // loaded this applet.
        if (m_fileToLoad.length() > 1) {
            // See if it is a complete URL or just "filename.mdf"
            if (!m_fileToLoad.startsWith("http")) {
                // Just a filename was provided; prepend this page's host etc.
                String sDocBase = getDocumentBase().toString();
                int iLastSlash = sDocBase.lastIndexOf("/");
                m_fileToLoad = sDocBase.substring(0, iLastSlash + 1) +
                               m_fileToLoad;
            }
            InputStream isRemoteFile = null;
            try {
                URL u = new URL(m_fileToLoad);
                URLConnection conn = u.openConnection();
                isRemoteFile = conn.getInputStream();

                // Load the map
                m_visualMapJ.getMapJ().loadMapDefinition(isRemoteFile);

                /////////////////////////////////////////////20070116
                RendererParams rParams = new RendererParams();
                rParams.setURL(m_mapxtremeURL);
                rParams.setMime("image/gif");
                m_visualMapJ.setRendererParams(rParams);
                ////////////////////////////////////////////

                m_visualMapJ.setShowToolTips(true);
                m_visualMapJ.setCenter(new DoublePoint(114.07,22.51));
            } catch (Exception e) {
                //e.printStackTrace();
            } finally {
                try {
                    if (isRemoteFile != null) {
                        isRemoteFile.close();
                    }
                } catch (Exception ee) {
                }
            }

            m_visualMapJ.repaint();
        }
    } // start method

    //Initialize the applet
    public void init() {
        // If the HTML page specified parameters, use them to
        // override our default values.

        // See if a MapDef file was specified in the HTML file.
        String strParm = getParameter("filetoload");
        if (strParm != null && strParm.length() > 1) {
            m_fileToLoad = strParm;
        }

        // See if the HTML page specified text strings to use as button labels,
        // etc.  (This parameter allows you to reword the text by editing the
        // HTML page without having to modify or recompile any Java classes.)
        strParm = getParameter("addthemelabel");
        if (strParm != null && strParm.length() > 1) {
            m_addThemeLabel = strParm;
        }
        strParm = getParameter("radiuslabel");
        if (strParm != null && strParm.length() > 1) {
            m_radiusLabel = strParm;
        }

        // See if the HTML page specified the URL to the MapXtremeServlet
        /*
        strParm = getParameter("mapxtremeurl");
        if (strParm != null && strParm.length() > 1) {
            // The HTML page specified an URL, so we will use it.
            m_mapxtremeURL = strParm;
        } else {
            // The HTML file did not specify a MapXtreme URL.
            // If the m_mapxtremeURL variable was not explicitly assigned,
            // we will make an educated guess at what the URL might be:
            if (m_mapxtremeURL == null) {
                String sDocBase = getDocumentBase().toString();
                // Given the applet's document base, extract just the first
                // part of the string -- the "://host:port" portion
                // of the string -- so that we can build a MapXtreme URL
                // that references the same server.
                int lastSlashPosition = sDocBase.indexOf("/", 8);
                if (lastSlashPosition != -1) {
                    m_mapxtremeURL = sDocBase.substring(0, lastSlashPosition)
                                     + "/mapxtreme480/mapxtreme";
                }
            }
        }
        */

        // Print out some information to aid troubleshooting
        if (m_Debug) {
            System.out.println(" ");
            System.out.println("m_fileToLoad  =" + m_fileToLoad);
            System.out.println("m_mapxtremeURL  =" + m_mapxtremeURL);