Creating a read-only map application

Developing with design tools > Using the Map Builder > Writing an application > 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);

}

);

}