public void setSelectedDisplayOption(MatrixType[] options, boolean control) {
   if (control) {
     MatrixType originalMatrixType = (MatrixType) displayOptionComboBox.getSelectedItem();
     displayOptionComboBox.setModel(new DefaultComboBoxModel<MatrixType>(options));
     int indx = 0;
     for (int i = 0; i < displayOptionComboBox.getItemCount(); i++) {
       if (originalMatrixType.equals(displayOptionComboBox.getItemAt(i))) {
         indx = i;
         break;
       }
     }
     displayOptionComboBox.setSelectedIndex(indx);
   } else {
     displayOptionComboBox.setModel(new DefaultComboBoxModel<MatrixType>(options));
     displayOptionComboBox.setSelectedIndex(0);
   }
 }