private OptionHandler CreateOptionHandler()
{
var handler = new OptionHandler(PreferredPlacement);
IOptionItem item;
handler.AddString(LabelText, "Label").PropertyChanged += OptionHandlerPropertyChanged;
handler.AddDouble(PlacementDistance, 5.0).PropertyChanged += OptionHandlerPropertyChanged;
item = handler.AddList(PlacementAlongEdge, PlacementsAlongEdge, PlacementsAlongEdge[0]);
item.PropertyChanged += OptionHandlerPropertyChanged;
item = handler.AddList(PlacementSideOfEdge, PlacementsSideOfEdge, PlacementsSideOfEdge[0]);
item.PropertyChanged += OptionHandlerPropertyChanged;
item = handler.AddList(PlacementSideReference, SideReferences, SideReferences[0]);
item.PropertyChanged += OptionHandlerPropertyChanged;
handler.AddDouble(Angle, 0.0).PropertyChanged += OptionHandlerPropertyChanged;
item = handler.AddList(AngleReference, AngleReferences, AngleReferences[0]);
item.PropertyChanged += OptionHandlerPropertyChanged;
item = handler.AddList(AngleRotation, AngleRotations, AngleRotations[0]);
item.PropertyChanged += OptionHandlerPropertyChanged;
handler.AddBool(AngleAdd180Degree, false).PropertyChanged += OptionHandlerPropertyChanged;
var rm = new ResourceManager("Demo.yFiles.Layout.PreferredLabelPlacement.PreferredLabelPlacement",
Assembly.GetExecutingAssembly());
var rmf = new ResourceManagerI18NFactory();
rmf.AddResourceManager(handler.Name, rm);
handler.I18nFactory = rmf;
return(handler);
}