longPress method Null safety
Dispatch a pointer down / pointer up sequence (with a delay of kLongPressTimeout + kPressTimeout between the two events) at the center of the given widget, assuming it is exposed.
The warnIfMissed
argument, if true (the default), causes a warning to be
displayed on the console if the specified Finder indicates a widget and
location that, were a pointer event to be sent to that location, would not
actually send any events to the widget (e.g. because the widget is
obscured, or the location is off-screen, or the widget is transparent to
pointer events).
Set the argument to false to silence that warning if you intend to not actually hit the specified element.
For example, consider a widget that, when long-pressed, shows an overlay
that obscures the original widget. A test for that widget might first
long-press that widget with warnIfMissed
at its default value true, then
later verify that long-pressing the same location (using the same finder)
has no effect (since the widget is now obscured), setting warnIfMissed
to false on that second call.
Implementation
Future<void> longPress(Finder finder, {int? pointer, int buttons = kPrimaryButton, bool warnIfMissed = true}) {
return longPressAt(getCenter(finder, warnIfMissed: warnIfMissed, callee: 'longPress'), pointer: pointer, buttons: buttons);
}