Disallow linking under certain circumstances

@meilens wrote:

Hello,

I have following Problem to solve. I have a node which has two ports, one of the left and one on the right side. Now, when my model is in read-only mode, only links from These two specific ports are allowed.

In the linking tool, there is a method FindLinkablePort() which I can use. But it doesn't exist for the Re-linking tool. And I don't see how I can find out about the starting port there.

I Tried to Workaround by putting my code in the DoActivate method which can provide me with the necessary Information. There, when I want to disallow the links, I call base.DoCancel() and base.DoStop. But I experience a problematic behaviour there, namely that the Cursor (Hand Cursor) which becomes active when the user starts to drag the link, stays active after the cancel and stop method.

So am I doing sth. wrong with the cancellation of the started linking tool Action? Or even better, is there some way to Access the port Information I Need in the CanStart method?

Any help is appreciated.

Marc

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