focus method

@override void focus([ String name = '' ])

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 array = fb.array(['john', 'susan']);

// UI text field get focus and the device keyboard pop up
array.focus('0');

Focus a nested child control by path.

final array = fb.array({
  [fb.group({'name': ''})]
});

// UI text field get focus and the device keyboard pop up
array.focus('0.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.first.focus();
  }
}