private void BeComRules_NodeDragFeedback(object sender, TreeDragFeedbackEventArgs e)
{
if (e.ParentNode != null)
{
e.AllowDrop = false;
}
}
private void _decisionTree_NodeDragFeedback(object sender, TreeDragFeedbackEventArgs e)
{
// Get mouse position relative to tree control
Point mousePos = _decisionTree.PointToClient(Control.MousePosition);
// Get node mouse is over
Node mouseOverNode = _decisionTree.GetNodeAt(mousePos.Y);
if (mouseOverNode == null && _decisionTree.Nodes.Count > 0)
{
e.AllowDrop = false;
}
else if (mouseOverNode != null)
{
if (e.ParentNode?.Tag is NaryItemContext naryItemContext)
{
if (naryItemContext.BooleanType == typeof(NotRuleNode) &&
e.ParentNode.HasChildNodes)
{
e.AllowDrop = false;
}
}
else
{
e.AllowDrop = false;
}
}
}
private void _diagrams_NodeDragFeedback(object sender, TreeDragFeedbackEventArgs e)
{
// Get mouse position relative to tree control
Point mousePos = _diagrams.PointToClient(Control.MousePosition);
// Get node mouse is over
Node mouseOverNode = _diagrams.GetNodeAt(mousePos.Y);
e.AllowDrop = (e.ParentNode == null) && (mouseOverNode == null);
}
