void BeginConnection(Guid nodeId, int portIndex, PortType portType)
{
bool isInPort = portType == PortType.Input;
var node = CurrentWorkspace.GetModelInternal(nodeId) as NodeModel;
if (node == null)
{
return;
}
PortModel portModel = isInPort ? node.InPorts[portIndex] : node.OutPorts[portIndex];
// Test if port already has a connection, if so grab it and begin connecting
// to somewhere else (we don't allow the grabbing of the start connector).
if (portModel.Connectors.Count > 0 && portModel.Connectors[0].Start != portModel)
{
activeStartPort = portModel.Connectors[0].Start;
// Disconnect the connector model from its start and end ports
// and remove it from the connectors collection. This will also
// remove the view model.
ConnectorModel connector = portModel.Connectors[0];
if (CurrentWorkspace.Connectors.Contains(connector))
{
var models = new List <ModelBase> {
connector
};
CurrentWorkspace.RecordAndDeleteModels(models);
connector.Delete();
}
}
else
{
activeStartPort = portModel;
}
}
