Creating a read-only map application

The following application is provided in the directory <installdir> /jviews-maps/samples/loadmap/index.html as part of the JViews Maps demonstration software. This is a simple case where the application loads a previously saved, read-only map in .ivl format, and displays it in the Map Builder main window. A map of this type can be built using the Map Builder or the JViews Maps API:

1. Import the required packages and classes:

    

   import ilog.views.IlvManagerView;

   import ilog.views.maps.IlvCoordinateSystemProperty;

   import ilog.views.maps.beans.IlvJMouseCoordinateViewer;

   import ilog.views.maps.beans.IlvMapLegend;

   import ilog.views.maps.srs.coordsys.IlvGeographicCoordinateSystem;

   import ilog.views.swing.IlvJManagerViewControlBar;

   import ilog.views.swing.IlvJScrollManagerView;

   import java.awt.BorderLayout;

   import java.awt.Dimension;

   import java.io.File;

   import javax.swing.JFrame;

2. Create the basic building blocks of the Map Builder: create a frame containing the map beans, set it to exit when the Close button is pressed, set up the beans, and arrange the main window layout:

    

   public class LoadMapDemo extends JFrame {

      IlvManagerView view=new IlvManagerView();

      IlvJScrollManagerView viewScroll=new IlvJScrollManagerView(view);

      IlvJManagerViewControlBar viewToolbar = new IlvJManagerViewControlBar();

      IlvJMouseCoordinateViewer locator=new IlvJMouseCoordinateViewer();

      IlvMapLegend legend=new IlvMapLegend();

   public LoadMapDemo() {

      super();

      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

      viewToolbar.setView(view);

      locator.setView(view);

      legend.setView(view);

      view.setSize(new Dimension(900, 450));

      view.setKeepingAspectRatio(true);

      viewScroll.setPreferredSize(view.getSize());

      view.getManager().setNamedProperty(new

         IlvCoordinateSystemProperty(IlvGeographicCoordinateSystem.WGS84));

      getContentPane().add(viewToolbar,BorderLayout.NORTH);

      getContentPane().add(viewScroll,BorderLayout.CENTER);

      getContentPane().add(locator,BorderLayout.SOUTH);

      getContentPane().add(legend,BorderLayout.LINE_START);

      loadFile("data/county.ivl"); //$NON-NLS-1$

   }

3. Load the file into the manager of the view:

    

   public void loadFile(String filename){

      try {

         IlvMapInputStream mapInput = new IlvMapInputStream(filename);

         mapInput.read(view.getManager());

         view.fitTransformerToContent();

         pack();

      } catch(Exception ex){

         ex.printStackTrace();

      }

   }

4. Write the main method:

    

   static public void main(String args[]) {

     javax.swing.SwingUtilities.invokeLater(

       new Runnable() {

         public void run() {

           final JFrame frame = new LoadMapDemo();

           frame.pack();

           frame.setVisible(true);

       }

     );

   }