selectPosition method
Move selection to the location of the last tap down.
This method is mainly used to translate user inputs in global positions into a TextSelection. When used in conjunction with a EditableText, the selection change is fed back into TextEditingController.selection.
If you have a TextEditingController, it's generally easier to
programmatically manipulate its value
or selection
directly.
Implementation
@override
void selectPosition({required SelectionChangedCause cause}) {
selectPositionAt(from: _lastTapDownPosition!, cause: cause);
}