private void DomNodeOnChildRemoving(object sender, ChildEventArgs e)
{
if (Validating)
{
// removing a module from a sub-circuit?
Element element = e.Child.As <Element>();
SubCircuit subCircuit = e.Parent.As <SubCircuit>();
if (element != null &&
subCircuit != null)
{
ICircuitElementType type = element.Type;
// todo: this test isn't quite right, because not all circuit elements
// necessarily have both inputs and outputs. For example, if the Speaker
// element from the Circuit Editor sample app is the only element in a Master,
// and then it is deleted, that will trigger this exception.
if (type.Inputs.Count + type.Outputs.Count == 1)
{
// Ensures that sub-circuit inputs/outputs aren't added or removed, as this would
// invalidate wiring on instances of them.
throw new InvalidTransactionException(
"Can't remove connectors from sub-circuits".Localize());
}
}
}
}
private void DomNodeChildInserting(object sender, ChildEventArgs e)
{
if (Validating)
{
// inserting an instance of a sub-circuit into itself?
SubCircuitInstance subCircuitInstance = e.Child.As <SubCircuitInstance>();
SubCircuit subCircuit = e.Parent.As <SubCircuit>();
if (subCircuitInstance != null &&
subCircuit != null &&
subCircuitInstance.SubCircuit == subCircuit)
{
throw new InvalidTransactionException(
"Can't use a sub-circuit inside itself".Localize());
}
}
}
private object[] ExpandMaster(CircuitEditingContext context, SubCircuitInstance subCircuitInstance)
{
// remove the sub-circuit instance
var circuit = context.CircuitContainer;
circuit.Elements.Remove(subCircuitInstance);
SubCircuit subCircuit = subCircuitInstance.SubCircuit as SubCircuit;
// clone sub-circuit contents
List <object> subCircuitContents = new List <object>();
subCircuitContents.AddRange(Adapters.AsIEnumerable <object>(subCircuit.Elements));
subCircuitContents.AddRange(Adapters.AsIEnumerable <object>(subCircuit.Wires));
DomNode[] clones = DomNode.Copy(Adapters.AsIEnumerable <DomNode>(subCircuitContents));
object[] data = new object[clones.Length];
clones.CopyTo(data, 0);
return(data);
}
