// Creates an unfinished Connection that should be updated during DragDelta events and either removed or connected
public ConnectionLine(Operator parentOp, IConnectionLineSource source, OperatorPart output)
{
ParentOp = parentOp;
Source = source;
Output = output;
CreateLineGeometry();
IsSelected = false;
ID = Guid.Empty;
IsHitTestVisible = false;
_thumb.IsHitTestVisible = false;
MouseLeftButtonDown += ConnectionLine_MouseLeftButtonDownHandler;
}
public void DoDragDropNewConnection(IConnectionLineSource sourceWidget, OperatorPart output)
{
_dragStartPositionOnCanvas = Win32RawInput.MousePointInUiElement(_cgv.XOperatorCanvas);
_snappedToValidInput = false;
var dragData = new DataObject(CONNECTION_LINE_OUTPUT_IDENTIFIER, output);
// We have to restart the temp connection, because DoDragDrop triggers DragCompleted
Start(_dragStartPositionOnCanvas, sourceWidget, output.Func.EvaluationIndex);
DragDrop.AddGiveFeedbackHandler(_cgv, GiveFeedbackHandler);
DragDrop.DoDragDrop(_cgv, dragData, DragDropEffects.All);
// Importat! This line is not reached until drop is completed.
DragDrop.RemoveGiveFeedbackHandler(_cgv, GiveFeedbackHandler);
Stop(new Vector(), null);
}
/// <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 ConnectionLine(Guid id, Operator parentOp, IConnectionLineSource source, IConnectionLineTarget target, OperatorPart output, OperatorPart input)
{
//IsHitTestVisible = false;
ID = id;
ParentOp = parentOp;
Source = source;
Target = target;
Output = output;
Input = input;
CreateLineGeometry();
IsSelected = false;
if (!Output.Parent.Visible || !Input.Parent.Visible)
{
Opacity = 0;
IsHitTestVisible = false;
}
ToolTip = Output.ToString() + " -> " + Input.ToString() + "\n" + "(Drag with CTRL to disconnect)";
MouseLeftButtonDown += ConnectionLine_MouseLeftButtonDownHandler;
Loaded += ConnectionLine_Loaded;
Unloaded += OnUnloaded;
}
