protected void setAirspaces(Iterable<? extends Airspace> airspaces) {
      ArrayList<AirspaceEntry> entryList =
          new ArrayList<AirspaceEntry>(this.getModel().getEntries());
      this.removeEntries(entryList);

      for (Airspace airspace : airspaces) {
        airspace.setAttributes(getDefaultAttributes());
        AirspaceEntry entry = new AirspaceEntry(airspace, getEditorFor(airspace));
        this.addEntry(entry);
      }
    }
    protected void loadAirspacesFromPath(String path, Collection<Airspace> airspaces) {
      File file = ExampleUtil.saveResourceToTempFile(path, ".zip");
      if (file == null) return;

      try {
        ZipFile zipFile = new ZipFile(file);

        ZipEntry entry = null;
        for (Enumeration<? extends ZipEntry> e = zipFile.entries();
            e.hasMoreElements();
            entry = e.nextElement()) {
          if (entry == null) continue;

          String name = WWIO.getFilename(entry.getName());

          if (!(name.startsWith("gov.nasa.worldwind.render.airspaces") && name.endsWith(".xml")))
            continue;

          String[] tokens = name.split("-");

          try {
            Class c = Class.forName(tokens[0]);
            Airspace airspace = (Airspace) c.newInstance();
            BufferedReader input =
                new BufferedReader(new InputStreamReader(zipFile.getInputStream(entry)));
            String s = input.readLine();
            airspace.restoreState(s);
            airspaces.add(airspace);

            if (tokens.length >= 2) {
              airspace.setValue(AVKey.DISPLAY_NAME, tokens[1]);
            }
          } catch (Exception ex) {
            ex.printStackTrace();
          }
        }
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
  protected void doMoveAirspaceLaterally(
      WorldWindow wwd, Airspace airspace, Point mousePoint, Point previousMousePoint) {
    // Intersect a ray throuh each mouse point, with a geoid passing through the reference
    // elevation. Since
    // most airspace control points follow a fixed altitude, this will track close to the intended
    // mouse position.
    // If either ray fails to intersect the geoid, then ignore this event. Use the difference
    // between the two
    // intersected positions to move the control point's location.

    if (!(airspace instanceof Movable)) {
      return;
    }

    Movable movable = (Movable) airspace;
    View view = wwd.getView();
    Globe globe = wwd.getModel().getGlobe();

    Position refPos = movable.getReferencePosition();
    if (refPos == null) return;

    // Convert the reference position into a cartesian point. This assumes that the reference
    // elevation is defined
    // by the airspace's lower altitude.
    Vec4 refPoint = null;
    if (airspace.isTerrainConforming()[LOWER_ALTITUDE])
      refPoint = wwd.getSceneController().getTerrain().getSurfacePoint(refPos);
    if (refPoint == null) refPoint = globe.computePointFromPosition(refPos);

    // Convert back to a position.
    refPos = globe.computePositionFromPoint(refPoint);

    Line ray = view.computeRayFromScreenPoint(mousePoint.getX(), mousePoint.getY());
    Line previousRay =
        view.computeRayFromScreenPoint(previousMousePoint.getX(), previousMousePoint.getY());

    Vec4 vec = AirspaceEditorUtil.intersectGlobeAt(wwd, refPos.getElevation(), ray);
    Vec4 previousVec = AirspaceEditorUtil.intersectGlobeAt(wwd, refPos.getElevation(), previousRay);

    if (vec == null || previousVec == null) {
      return;
    }

    Position pos = globe.computePositionFromPoint(vec);
    Position previousPos = globe.computePositionFromPoint(previousVec);
    LatLon change = pos.subtract(previousPos);

    movable.move(new Position(change.getLatitude(), change.getLongitude(), 0.0));

    this.fireAirspaceMoved(new AirspaceEditEvent(wwd, airspace, this));
  }