public NodeAutoCheckBox(VplElement hostNodeGroup)
{
HostElement = hostNodeGroup;
//HostElement.HostCanvas.Children.Add(this);
HostElement.HitTestGrid.Children.Add(this);
Grid.SetColumn(this, 2);
Margin = new Thickness(5);
IsChecked = true;
BorderBrush = Application.Current.Resources["BrushBlue"] as Brush;
Foreground = Application.Current.Resources["BrushBlue"] as Brush;
HostNodeGroup_PropertyChanged(null, null);
HostElement.PropertyChanged += HostNodeGroup_PropertyChanged;
}