private void beanToForm(boolean isEditMode) {
    if (bean.getId() == null) {
      fieldId.setText("NOVO");
    } else {
      fieldId.setText(bean.getId() + "");
    }
    fieldNome.setText(bean.getNome());
    fieldValor.setValue(bean.getValor());
    textObservacao.setText(bean.getObservacao());

    fieldNome.setEditable(isEditMode);
    fieldValor.setEditable(isEditMode);
    textObservacao.setEditable(isEditMode);

    buttonNovo.setEnabled(!isEditMode);
    buttonSalvar.setEnabled(isEditMode);
    buttonEditar.setEnabled(!isEditMode);
    buttonExcluir.setEnabled(!isEditMode);
  }