onMoveCursorBackwardByCharacter property

MoveCursorHandler onMoveCursorBackwardByCharacter

The handler for SemanticsAction.onMoveCursorBackwardByCharacter.

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

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

Implementation 

MoveCursorHandler get onMoveCursorBackwardByCharacter => _onMoveCursorBackwardByCharacter;
void onMoveCursorBackwardByCharacter= (MoveCursorHandler handler)

Implementation 

set onMoveCursorBackwardByCharacter(MoveCursorHandler handler) {
  if (_onMoveCursorBackwardByCharacter == handler)
    return;
  final bool hadValue = _onMoveCursorBackwardByCharacter != null;
  _onMoveCursorBackwardByCharacter = handler;
  if ((handler != null) != hadValue)
    markNeedsSemanticsUpdate();
}