Prevent deletion of a node without preventing it from being moved

[Zapwasd]

I would like to have the possibility to delete links but disable the possibility to delete nodes. Nodes should mantain the possibility to be moved. Is it possible?

Thanks in advance.

[Zapwasd]

I have found the solution to my problem.

diagram.SelectionChanged += Diagram_SelectionChanged;

private void Diagram_SelectionChanged(SelectableModel element) { int selectedLinksCount = diagram.Links.Count(x => x.Selected); int selectedNodesCount = diagram.Nodes.Count(x => x.Selected); int selectedGroupsCount = diagram.Groups.Count(x => x.Selected);

if (selectedLinksCount == 1 && selectedNodesCount + selectedGroupsCount == 0)
{
    diagram.Options.DeleteKey = "Delete";
}
else
{
    diagram.Options.DeleteKey = "";
}

}

[zHaytam]

Hello,

Did you try using Options.Constraints? There is ShouldDeleteNode option, which returns true by default, you can change it to _ => false;

[Zapwasd]

Hello,

Did you try using Options.Constraints? There is ShouldDeleteNode option, which returns true by default, you can change it to _ => false;

Thank you zHaytam for your suggestion. It works fine.