@SuppressWarnings({"UnusedDeclaration"})
 protected void selectButtonActionPerformed(ActionEvent event) {
   if (this.selector.getSector() != null) {
     this.selector.disable();
   } else {
     this.selector.enable();
   }
   updateSector();
 }
 /** Clear the current selection sector and remove it from the globe. */
 public void clearSector() {
   if (this.selector.getSector() != null) {
     this.selector.disable();
   }
   updateSector();
 }