void Connectors_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
switch (e.Action)
{
case NotifyCollectionChangedAction.Add:
foreach (var item in e.NewItems)
{
var viewModel = new dynConnectorViewModel(item as dynConnectorModel);
_connectors.Add(viewModel);
}
break;
case NotifyCollectionChangedAction.Reset:
_connectors.Clear();
break;
case NotifyCollectionChangedAction.Remove:
foreach (var item in e.OldItems)
{
_connectors.Remove(_connectors.First(x => x.ConnectorModel == item));
}
break;
}
}
private void Connect(object parameter)
{
// if this is a
if (!dynSettings.Controller.DynamoViewModel.CurrentSpaceViewModel.IsConnecting)
{
//test if port already has a connection if so grab it
//and begin connecting to somewhere else
//don't allow the grabbing of the start connector
if (_port.Connectors.Count > 0 && _port.Connectors[0].Start != _port)
{
//define the new active connector
var c = new dynConnectorViewModel(_port.Connectors[0].Start);
dynSettings.Controller.DynamoViewModel.CurrentSpaceViewModel.ActiveConnector = c;
dynSettings.Controller.DynamoViewModel.CurrentSpaceViewModel.IsConnecting = true;
//disconnect the connector model from its start and end ports
//and remove it from the connectors collection. this will also
//remove the view model
var successfulRemoval = dynSettings.Controller.DynamoViewModel.CurrentSpace.Connectors.Remove(_port.Connectors[0]);
_port.Connectors[0].NotifyConnectedPortsOfDeletion();
}
else
{
try
{
//Create a connector view model to begin drawing
if (_port.PortType != PortType.INPUT)
{
var c = new dynConnectorViewModel(_port);
dynSettings.Controller.DynamoViewModel.CurrentSpaceViewModel.ActiveConnector = c;
dynSettings.Controller.DynamoViewModel.CurrentSpaceViewModel.IsConnecting = true;
}
}
catch (Exception ex)
{
Debug.WriteLine(ex.Message);
}
}
}
else // attempt to complete the connection
{
if (_port.PortType != PortType.INPUT)
{
return;
}
//remove connector if one already exists
if (_port.Connectors.Count > 0)
{
var connToRemove = _port.Connectors[0];
dynSettings.Controller.DynamoViewModel.CurrentSpaceViewModel.Model.Connectors.Remove(
connToRemove);
_port.Disconnect(connToRemove);
var startPort = connToRemove.Start;
startPort.Disconnect(connToRemove);
}
// create the new connector model
var start = dynSettings.Controller.DynamoViewModel.CurrentSpaceViewModel.ActiveConnector.ActiveStartPort;
var end = _port;
var newConnectorModel = dynConnectorModel.Make(start.Owner, end.Owner, start.Index, end.Index, 0);
// the connector is invalid
if (newConnectorModel == null)
{
return;
}
// Add to the current workspace
dynSettings.Controller.DynamoViewModel.CurrentSpaceViewModel.Model.Connectors.Add(newConnectorModel);
// Cleanup
dynSettings.Controller.DynamoViewModel.CurrentSpaceViewModel.IsConnecting = false;
dynSettings.Controller.DynamoViewModel.CurrentSpaceViewModel.ActiveConnector = null;
}
}
