showDatasetAlertDialog function

Implementation

void showDatasetAlertDialog(
  BuildContext context,
  WidgetRef ref,
  bool loadNewDataset, {
  String title = 'Load a Dataset',
}) {
  // Show Alert Window and then reset the app after confirmation.
  showDialog(
    context: context,
    builder: (BuildContext context) {
      return AlertDialog(
        title: Row(
          children: [
            const Icon(Icons.warning, color: Colors.red),
            const SizedBox(width: 20),
            Text(title),
          ],
        ),
        content: MarkdownBody(
          data: wordWrap('''

            **Loading** a new dataset or **Reseting** the app will clear out all
            of the current data and the captured R script. You will lose any
            work already completed. You may like to consider saving your R
            script from the Script tab before continuing so you can replicate
            your activity in Rattle later on in R itself.  Are you sure you
            would like to **continue**?

            '''),
          selectable: true,
          softLineBreak: true,
        ),
        actions: <Widget>[
          TextButton(
            style: TextButton.styleFrom(
              textStyle: Theme.of(context).textTheme.labelLarge,
            ),
            child: const Text('No'),
            onPressed: () {
              Navigator.of(context).pop();
            },
          ),
          TextButton(
            style: TextButton.styleFrom(
              textStyle: Theme.of(context).textTheme.labelLarge,
            ),
            child: const Text('Yes'),
            onPressed: () async {
              // 20240817 gjw Note the reset before showOptionPopup because the
              // other way around casues a bug? First set load to true and then
              // reset it to false but the dataset actually is loaded as a
              // consequence the previous result won't be reset because load
              // indicates no dataset has been loaded and the app is fresh.
              await reset(context, ref);
              if (context.mounted) Navigator.of(context).pop();

              if (loadNewDataset) {
                if (context.mounted) {
                  showDialog(
                    context: context,
                    builder: (BuildContext context) {
                      return const DatasetPopup();
                    },
                  );
                }
              }
            },
          ),
        ],
      );
    },
  );
}