DataRequestViewImpl.java 文件源码

private DataRequestParameterWidget createRequestWidget(String name, String value) {
  final DataRequestParameterWidget param;
  if (parameterKeyConstraint != null) {
    param = new ConstrainedParameterWidget(parameterKeyConstraint, name, value);
  } else {
    param = new CustomParameterWidget(name, value);
  }
  param.addChangeHandler(new ChangeHandler() {
      @Override
      public void onChange(ChangeEvent arg0) {
        Widget w = (Widget) param;
        dataRequestParameters.remove(w);
      }
    });
  return param;
}