public static IEnumerable <BaseShapeViewModel> GetAllShapes(this ProjectContainerViewModel project)
{
return(project?.Documents
.SelectMany(d => d.Pages)
.SelectMany(c => c.Layers)
.SelectMany(l => l.Shapes));
}
public static IEnumerable <T> GetAllShapes <T>(this ProjectContainerViewModel project)
{
var shapes = project?.Documents
.SelectMany(d => d.Pages)
.SelectMany(c => c.Layers)
.SelectMany(l => l.Shapes);
return(shapes.GetAllShapes()?.Where(s => s is T).Cast <T>());
}