focus method
Sets focus to a child control.
The argument name
is a dot-delimited string that define the path to the
control.
Example:
Focus a child control by name.
final form = fb.group({'name': ''});
// UI text field get focus and the device keyboard pop up
form.focus('name');
Focus a nested child control by path.
final form = fb.group({
'person': fb.group({
'name': '',
})
});
// UI text field get focus and the device keyboard pop up
form.focus('person.name');
Implementation
@override
void focus([String name = '']) {
if (name.isNotEmpty) {
final control =
findControlInCollection(name.split(_controlNameDelimiter));
if (control != null) {
control.focus();
}
} else if (_controls.isNotEmpty) {
_controls.values.first.focus();
}
}