public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
{
eElementStateType state = (eElementStateType)value;
Style answer = null;
switch (state)
{
case eElementStateType.Exist:
answer = Application.Current.FindResource("CellStackPanelDefaultStyle") as Style;
break;
case eElementStateType.Empty:
answer = Application.Current.FindResource("CellStackPanelEmptytStyle") as Style;
break;
case eElementStateType.Add:
answer = Application.Current.FindResource("CellStackPanelAddStyle") as Style;
break;
case eElementStateType.Delete:
answer = Application.Current.FindResource("CellStackPanelDeleteStyle") as Style;
break;
case eElementStateType.CreateLink:
answer = Application.Current.FindResource("CellStackPanelLinkStyle") as Style;
break;
default:
break;
}
return(answer);
}
/// <summary>
/// Получить имена элементов в зависимости от объекта, типа эемента и состояния элемента
/// </summary>
/// <param name="splitterObjectType">Тип объекта</param>
/// <param name="elementStates">Состояние элемента (можно несколько)</param>
/// <param name="packageElementType">Тип элемента (можно несколько)</param>
/// <returns></returns>
private IEnumerable <string> GetNames(eSplitterObjectType splitterObjectType, eElementStateType elementStates, ePackageElementType packageElementType = ePackageElementType.Procedure | ePackageElementType.Function)
{
var x = Expr.Expression.Parameter(typeof(SplitterElement), "x");
var HasFlagMethod = typeof(Enum).GetMethod("HasFlag", new[] { typeof(Enum) });
var xPackageElementType = Expr.Expression.Convert(Expr.Expression.PropertyOrField(x, "PackageElementType"), typeof(Enum));
var xPackageElementTypeHasFlagExpression = Expr.Expression.Call(Expr.Expression.Constant(packageElementType, typeof(Enum)), HasFlagMethod, xPackageElementType);
var xObjectType = Expr.Expression.Convert(Expr.Expression.PropertyOrField(x, splitterObjectType.ToString()), typeof(Enum));
var xObjectTypeHasFlagExpression = Expr.Expression.Call(Expr.Expression.Constant(elementStates, typeof(Enum)), HasFlagMethod, xObjectType);
var FinalExpression = Expr.Expression.AndAlso(xPackageElementTypeHasFlagExpression, xObjectTypeHasFlagExpression);
var Filter = (Func <SplitterElement, bool>)Expr.Expression.Lambda(FinalExpression, x).Compile();
Seri.Log.Verbose($"GetName Filter: {FinalExpression}");
/* Пример результата отбора
* _splitter.Elements.Where(x => packageElementType.HasFlag(x.PackageElementType) && elementStates.HasFlag(x.NewSpec));
* где вместо x.NewSpec подставится поле в зависимости от splitterObjectType
*/
return(_splitter.Elements.Where(Filter).Select(x => x.PackageElementName));
}
