/// <summary>
/// Returns candidates for all ports at orange nodes in the graph, except
/// for the current source node to avoid the creation of self-loops.
/// </summary>
public IEnumerable <IPortCandidate> GetTargetPortCandidates(IInputModeContext context)
{
List <IPortCandidate> result = new List <IPortCandidate>();
// add the current one as the default
result.Add(new DefaultPortCandidate(edge.TargetPort));
var graph = context.GetGraph();
if (graph == null)
{
return(result);
}
foreach (INode node in graph.Nodes)
{
if (node != edge.SourcePort.Owner && Colors.Orange.Equals(node.Tag))
{
// If available, use the candidates from the provider. Otherwise, add a default candidate.
IPortCandidateProvider provider = node.Lookup <IPortCandidateProvider>();
if (provider != null)
{
result.AddRange(provider.GetTargetPortCandidates(context));
}
else
{
result.Add(new DefaultPortCandidate(node, FreeNodePortLocationModel.NodeCenterAnchored));
}
}
}
return(result);
}
internal CustomPortCandidateProvider(INode node)
{
this.node = node;
geometryPortCandidateProvider =
PortCandidateProviders.Combine(
PortCandidateProviders.FromNodeCenter(node),
PortCandidateProviders.FromShapeGeometry(node));
}
