groupId property

Object? get groupId

An optional group ID that groups ShadMouseAreaRenderBoxs together so that they operate as one region. If any member of a group is hit by a particular hover, then all members will have their onEnter or onExit called.

If the group id is null, then only this region is hit tested.

Implementation

Object? get groupId => _groupId;

set groupId (Object? value)

Implementation

set groupId(Object? value) {
  if (_groupId != value) {
    // If the group changes, we need to unregister and re-register under the
    // new group. The re-registration happens automatically in layout().
    if (_isRegistered) {
      _registry!.unregisterMouseArea(this);
      _isRegistered = false;
    }
    _groupId = value;
    markNeedsLayout();
  }
}