onMoveCursorForwardByCharacter property Null safety

MoveCursorHandler? onMoveCursorForwardByCharacter

The handler for SemanticsAction.moveCursorForwardByCharacter.

This handler is invoked when the user wants to move the cursor in a text field forward by one character.

TalkBack users can trigger this by pressing the volume up key while the input focus is in a text field.

Implementation

MoveCursorHandler? get onMoveCursorForwardByCharacter => _onMoveCursorForwardByCharacter;
void onMoveCursorForwardByCharacter=(MoveCursorHandler? handler)

Implementation

set onMoveCursorForwardByCharacter(MoveCursorHandler? handler) {
  if (_onMoveCursorForwardByCharacter == handler)
    return;
  final bool hadValue = _onMoveCursorForwardByCharacter != null;
  _onMoveCursorForwardByCharacter = handler;
  if ((handler != null) != hadValue)
    markNeedsSemanticsUpdate();
}