show method
override
Shows a modal InfoDialog with centered htmlInfoText
.
While InfoDialog needs a close callback, this async method
returns the user input (button code DiaAttr.DIA_ACT_ABORT when
the red cross is pressed).
Implementation
static Future<UserInput> show(String htmlInfoText) async {
Completer<UserInput> cpl = Completer();
void closeCallback(UserInput results) {
cpl.complete(results);
}
InfoDialog(htmlInfoText, closeCallback);
return cpl.future;
}