public void AddToGraph(VisualPortGraphNode source, VisualPortGraphNode destination, Port sourcePort, Port destinationPort)
{
if (source == null)
{
return;
}
source.GetPort(sourcePort.Name, condition: p => !p.IsInputPort);
if (destination != null && destinationPort == null)
{
// Select matching port on destination
destinationPort = destination.GetPort(sourcePort.Type, byMatchingType: true, condition: p => p.IsInputPort) ??
destination.Ports.FirstOrDefault(p => p.IsInputPort);
}
var sourcePositionHandler = new Action <string, Port, IPortConnection>((nodeId, port, connection) =>
{
var node = Graph.GetNode(nodeId);
if (node != null)
{
var portRender = node.PortRenders[port.Name];
var position = portRender.TranslatePoint(new Point(0, 0), node.Render);
position.X += node.PositionX + portRender.ActualWidth;
position.Y +=
node.PositionY
+ portRender.ActualHeight / 2
+ connection.SourcePort.ConnectionIds.IndexOf(connection.Id) * 5
- connection.SourcePort.ConnectionIds.Count * 5;
connection.SourcePosition = position;
}
});
var destinationPositionHandler = new Action <string, Port, IPortConnection>((nodeId, port, connection) =>
{
var node = Graph.GetNode(nodeId);
if (node != null)
{
FrameworkElement portRender;
if (node.PortRenders.ContainsKey(port.Name))
{
portRender = node.PortRenders[port.Name];
}
else
{
portRender = node.PortRenders.Values.First();
}
var position = portRender.TranslatePoint(new Point(0, 0), node.Render);
position.X += node.PositionX;
position.Y += node.PositionY + portRender.ActualHeight / 2;
connection.DestinationPosition = position;
}
});
var newConnection = new PortGraphConnection()
{
Graph = Graph,
StateTransition = StateTransition,
UndoHistory = UndoHistory,
SourceId = source.Id,
DestinationId = destination?.Id ?? "",
SourcePort = sourcePort,
DestinationPort = destinationPort ?? null
};
newConnection.InitialiseRender();
newConnection.SourcePositionHandler = sourcePositionHandler;
newConnection.DestinationPositionHandler = destinationPositionHandler;
newConnection.Validate();
// The following should change to accomodate manually-set positions
if (sourcePort != null && !sourcePort.ConnectionIds.Contains(newConnection.Id))
{
sourcePort.ConnectionIds.Add(newConnection.Id);
}
if (destinationPort != null && destinationPort.ConnectionIds.Contains(newConnection.Id))
{
destinationPort.ConnectionIds.Add(newConnection.Id);
}
if (source != null)
{
source.RefreshPortUI();
}
if (destination != null)
{
destination.RefreshPortUI();
}
// Add connection when wire is manually placed onto a new source or destination
(source as VisualPortGraphNode).PortConnectionRequested += port =>
{
var conn = Graph.GetConnection(Graph.GetSelectedConnectionId());
if (conn != null)
{
if (port.IsInputPort)
{
conn.ChangeDestination(source.Id, port);
}
else
{
conn.ChangeSource(source.Id, port);
}
}
};
if (destination != null)
{
(destination as VisualPortGraphNode).PortConnectionRequested += port =>
{
var conn = Graph.GetConnection(Graph.GetSelectedConnectionId());
if (conn != null)
{
if (port.IsInputPort)
{
conn.ChangeDestination(destination.Id, port);
}
else
{
conn.ChangeSource(destination.Id, port);
}
}
StateTransition.Update(Enums.DiagramMode.Idle);
};
}
Graph.AddConnection(newConnection);
newConnection.Render.Loaded += (sender, args) => renderLoaded?.Execute();
foreach (var transitionEventHandler in transitionEventHandlers)
{
transitionEventHandler.Sender = newConnection;
}
if (destination != null)
{
Graph.SelectNode(destination.Id);
}
if (connectionIdOutput != null)
{
connectionIdOutput.Data = newConnection.Id;
}
}