private Future <bool> _warnUserAboutInvalidData()
{
FormState form = _formKey.currentState;
if (form == null || !_formWasEdited || form.validate())
{
return(Future.value(true).to <bool>());
}
return(material_.showDialog <bool>(
context: context,
builder: (BuildContext context) =>
{
return new AlertDialog(
title: new Text("This form has errors"),
content: new Text("Really leave this form?"),
actions: new List <Widget>
{
new FlatButton(
child: new Text("YES"),
onPressed: () => { Navigator.of(context).pop(true); }
),
new FlatButton(
child: new Text("NO"),
onPressed: () => { Navigator.of(context).pop(false); }
)
}
);
}
) ?? Future.value(false).to <bool>());
}
private void _handleSubmitted()
{
FormState form = _formKey.currentState;
if (!form.validate())
{
_autovalidate = true; // Start validating on every change"
showInSnackBar("Please fix the errors in red before submitting.");
}
else
{
form.save();
showInSnackBar($"{person.name}'s phone number is ${person.phoneNumber}");
}
}
void _handleOk()
{
if (_entryMode == DatePickerEntryMode.input)
{
FormState form = _formKey.currentState;
if (!form.validate())
{
setState(() => _autoValidate = true);
return;
}
form.save();
}
Navigator.pop(context, _selectedDate);
}
