source: josm/src/org/openstreetmap/josm/actions/OpenGpxAction.java@ 2

package org.openstreetmap.josm.actions;

import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;

import javax.swing.AbstractAction;
import javax.swing.ImageIcon;
import javax.swing.JFileChooser;
import javax.swing.JOptionPane;
import javax.swing.filechooser.FileFilter;

import org.jdom.JDOMException;
import org.openstreetmap.josm.data.osm.DataSet;
import org.openstreetmap.josm.gui.Main;
import org.openstreetmap.josm.gui.MapFrame;
import org.openstreetmap.josm.io.GpxReader;

/**
 * Open a file chooser dialog and select an file to import. Than call the gpx-import
 * driver. Finally open an internal frame into the main window with the gpx data shown.
 * 
 * @author imi
 */
public class OpenGpxAction extends AbstractAction {

        /**
         * Create an open action. The name is "&Open GPX".
         */
        public OpenGpxAction() {
                super("Open GPX", new ImageIcon("images/opengpx.png"));
                putValue(MNEMONIC_KEY, KeyEvent.VK_O);
        }

        public void actionPerformed(ActionEvent e) {
                JFileChooser fc = new JFileChooser("data");
                fc.setFileFilter(new FileFilter(){
                        @Override
                        public boolean accept(File f) {
                                String name = f.getName().toLowerCase();
                                return name.endsWith(".gpx") || name.endsWith(".xml");
                        }
                        @Override
                        public String getDescription() {
                                return "GPX or XML Files";
                        }});
                fc.showOpenDialog(Main.main);
                File gpxFile = fc.getSelectedFile();
                if (gpxFile == null)
                        return;
                
                try {
                        DataSet dataSet = new GpxReader().parse(new FileReader(gpxFile));
                        MapFrame map = new MapFrame(dataSet);
                        Main.main.setMapFrame(gpxFile.getName(), map);
                        map.setVisible(true);
                } catch (JDOMException x) {
                        x.printStackTrace();
                        JOptionPane.showMessageDialog(Main.main, "Illegal GPX document:\n"+x.getMessage());
                } catch (IOException x) {
                        x.printStackTrace();
                        JOptionPane.showMessageDialog(Main.main, "Could not read '"+gpxFile.getName()+"':\n"+x.getMessage());
                }
        }
}