public void AddConnection(Field a, Field b, Connection.Creator createdBy)
{
//Find out which is the input field and which is the output field
Field input, output;
if (InputFields.Contains(a) && OutputFields.Contains(b))
{
input = a;
output = b;
}
else if (InputFields.Contains(b) && OutputFields.Contains(a))
{
input = b;
output = a;
}
else
{
//Only connect inputs with outputs
return;
}
// Remove any existing connections to a newly connected output.
// There should never be more than one input connected to any given output
var conflictingConnections = Connections.Where(conn => conn.Output == output).ToList();
foreach (var conn in conflictingConnections)
{
RemoveConnection(conn);
}
SelectionStatus selectionStatus;
if (Selection.Contains(input) || Selection.Contains(output))
{
selectionStatus = SelectionStatus.ConnectionSelected;
}
else
{
selectionStatus = SelectionStatus.NotSelected;
}
Connections.Add(new Connection(input, output, createdBy, selectionStatus));
input.IsConnected = true;
output.IsConnected = true;
}
public bool IsConnectable(Field a, Field b)
{
return(a != null && b != null &&
((InputFields.Contains(a) && OutputFields.Contains(b)) ||
(InputFields.Contains(b) && OutputFields.Contains(a))));
}