/// <summary>
/// Start drag a new connection. Called from InputWidget and OperatorWidget when staring to drag from output thumb
/// </summary>
public void Start(Point p, IConnectionLineSource src, int outputIdx)
{
_sourceOutputIndex = -1;
if (outputIdx < 0 || outputIdx >= src.Outputs.Count)
{
return;
}
_sourceOutputIndex = outputIdx;
_sourceWidget = src;
_startPosition = p;
// NOTE: In the long term, this should be capable of handling simultaneously creating multiple connection
_lastPosition = _startPosition;
var cl = new ConnectionLine(_sourceWidget.CV.CompositionGraphView.CompositionOperator, _sourceWidget, _sourceWidget.Outputs[outputIdx]);
_sourceWidget.CV.CompositionGraphView.UnfinishedConnections.Add(cl);
_sourceWidget.CV.CompositionGraphView.XOperatorCanvas.Children.Add(cl);
cl.UpdateDuringConstruction(_lastPosition);
}
public void RewireExistingConnection(ConnectionLine cl, Point startPoint, int outputIdx)
{
_sourceOutputIndex = -1;
if (outputIdx < 0 || outputIdx >= cl.Source.Outputs.Count)
{
return;
}
_sourceWidget = cl.Source;
_sourceOutputIndex = outputIdx;
_startPosition = startPoint;
_lastPosition = _startPosition;
// Delete old connection from model...
cl.Remove();
cl.Target.UpdateConnections();
// ...and restart as unfinished connection line
_sourceWidget.CV.CompositionGraphView.UnfinishedConnections.Add(cl);
_sourceWidget.CV.CompositionGraphView.XOperatorCanvas.Children.Add(cl);
cl.UpdateDuringConstruction(_lastPosition);
cl.IsSelected = true;
}
