コード例 #1
0
  /**
   * recursive method to find nearest item in this layer (or any layer it contains).
   *
   * @param pl the one we want to be near to
   * @param nearest the place to put the results
   */
  private void findNearest(final Plottable pl, final dataStruct nearest) {
    if (pl.getVisible()) {
      // is this a layer?
      if (pl instanceof Layer) {
        // do the check for this item
        // NOTE: we only check the distance of elements, not whole tracks
        // nearest.compare(pl);

        // we need to call ourselves for each layer inside it
        final Layer l = (Layer) pl;

        final java.util.Enumeration<Editable> enumer = l.elements();
        while (enumer.hasMoreElements()) {
          Editable next = enumer.nextElement();
          if (next instanceof Plottable) {
            final Plottable this_plottable = (Plottable) next;
            findNearest(this_plottable, nearest);
          }
        }
      } else {
        // so, we've got to a node - compare it to our current data
        nearest.compare(pl);
      }
    }
  }
コード例 #2
0
    /**
     * compare method, is this new plottable nearest than the current one.
     *
     * @param newPl the item we're looking at
     */
    private final void compare(final Plottable newPl) {
      // is it even visible?
      if (!newPl.getVisible()) return;

      // calculate the range
      final double range = newPl.rangeFrom(location);

      // did it produce a valid range?
      if (range == Plottable.INVALID_RANGE) {
        return;
      }

      // so, we have a valid range. is it our first?
      if (distance == Plottable.INVALID_RANGE) {
        object = newPl;
        distance = range;
      } else {
        if (range < distance) {
          distance = range;
          object = newPl;
        }
      }
    }
コード例 #3
0
 public int compareTo(final Plottable arg0) {
   final Plottable other = (Plottable) arg0;
   return this.getName().compareTo(other.getName());
 }