showProgressDialog method Null safety

void showProgressDialog(
  1. {Color barrierColor = const Color(0x55222222),
  2. String? textToBeDisplayed,
  3. Duration dismissAfter = const Duration(minutes: 180),
  4. Function? onDismiss,
  5. Stream<double>? streamValue,
  6. Stream<String>? streamText,
  7. Color? progressColor}
)

Implementation

void showProgressDialog({
  Color barrierColor = const Color(0x55222222),
  String? textToBeDisplayed,
  Duration dismissAfter = const Duration(minutes: 180),
  Function? onDismiss,
  Stream<double>? streamValue,
  Stream<String>? streamText,
  Color? progressColor,
}) {
  dismissProgressDialog().then((_) {
    isDismissed = false;
    showModernFormGeneralDialog(
      barrierColor: barrierColor,
      pageBuilder: (context, animation1, animation2) {
        return _ModernFormProgressDialog(
          child: Container(
              padding: const EdgeInsets.all(20),
              child:
                  Column(mainAxisSize: MainAxisSize.min, children: <Widget>[
                streamValue != null
                    ? StreamBuilder<double>(
                        stream: streamValue,
                        initialData: 0,
                        builder: (context, snapshot) {
                          return ModernFormProgressIndicator(
                            value: snapshot.data ?? 0,
                            color: progressColor,
                          );
                        })
                    : ModernFormProgressIndicator(color: progressColor),
                streamText != null
                    ? Padding(
                        padding: EdgeInsets.only(top: 20),
                        child: StreamBuilder<String>(
                            stream: streamText,
                            initialData: "",
                            builder: (context, snapshot) {
                              return Material(
                                color: Colors.transparent,
                                child: Text(
                                  snapshot.data ?? "",
                                  style: TextStyle(
                                    color: Colors.white,
                                    fontSize: ScreenUtil().setSp(14),
                                  ),
                                  textAlign: TextAlign.center,
                                ),
                              );
                            }))
                    : textToBeDisplayed == null
                        ? Padding(
                            padding: EdgeInsets.all(0),
                          )
                        : Padding(
                            padding: EdgeInsets.only(top: 20),
                            child: Material(
                              color: Colors.transparent,
                              child: Text(
                                textToBeDisplayed,
                                style: TextStyle(
                                  color: Colors.white,
                                  fontSize: ScreenUtil().setSp(14),
                                ),
                                textAlign: TextAlign.center,
                              ),
                            ))
              ])),
        );
      },
      barrierDismissible: false,
      transitionDuration: const Duration(milliseconds: 100),
    ).then((dismissed) {
      isDismissed = dismissed as bool?;
    });
    _timer = Timer(dismissAfter, () {
      dismissProgressDialog();
      if (onDismiss != null) onDismiss();
    });
  });
}