/// <inheritdoc />
public override void OnDragPerform(DragPerformEvent e)
{
var dropElements = DragSource.GetSelection();
var contentViewContainer = (e.target as GraphView)?.ContentViewContainer ?? e.target as VisualElement;
var variablesToCreate = dropElements
.OfType <IVariableDeclarationModel>()
.Select((e1, i) => (
e1,
GUID.Generate().ToSerializableGUID(),
contentViewContainer.WorldToLocal(e.mousePosition) + i * DragDropSpacer * Vector2.down))
.ToList();
var droppedNodes = dropElements.OfType <INodeModel>();
if (droppedNodes.Any(e2 => !(e2 is IVariableNodeModel)) && variablesToCreate.Any())
{
// no way to handle this ATM
throw new ArgumentException("Unhandled case, dropping blackboard/variables fields and nodes at the same time");
}
if (variablesToCreate.Any())
{
Stencil.OnDragAndDropVariableDeclarations(Dispatcher, variablesToCreate);
}
}
