code: private void qrUserSizeActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_qrUserSizeActionPerformed
          // TODO add your handling code here:
          qrUserSizeCombo.setEnabled(true);
          qrUserEccCombo.setEnabled(false);
          encodeData();
      }
docs: GEN-LAST:event_qrUserSizeComboActionPerformed