/// <summary>
/// Get all visible layers in the control;
/// </summary>
/// <param name="cadControl"></param>
/// <returns></returns>
public static IEnumerable <CADLayer> GetVisibleLayers(this ICADControl cadControl)
{
if (cadControl == null)
{
throw new ArgumentNullException(nameof(cadControl));
}
return(cadControl.Layers?.Where(p => p.IsVisible) ?? Enumerable.Empty <CADLayer>());
}
/// <summary>
/// Get all drawobjects of the a specified cad control;
/// </summary>
/// <param name="cadControl"></param>
/// <returns></returns>
public static IEnumerable <DrawObject> GetAllDrawObjects(this ICADControl cadControl)
{
if (cadControl == null)
{
throw new ArgumentNullException(nameof(cadControl));
}
return(cadControl.Layers?.SelectMany(p => p.DrawObjects) ?? Enumerable.Empty <DrawObject>());
}
/// <summary>
/// Get all visible drawobjects of the specified type in the control;
/// </summary>
/// <param name="cadContext"></param>
/// <returns></returns>
public static IEnumerable <TDrawObject> GetAllVisibleDrawObjects <TDrawObject>(this ICADControl cadContext) where TDrawObject : DrawObject
{
return(GetAllDrawObjects(cadContext).Select(p => p as TDrawObject).Where(p => p != null));
}
