On Friday 20 February 2004 2:07 pm, Baveco, Hans wrote:
> Hi, I am trying to adapt Connectors (1.9) to my needs - connecting only
> morphs of a certain class. I found out how to connect correctly when
> creating a new connector (an instance of a subclass of NCConnectorMorph I
> defined). HOwever, how to proceed when disconnecting and reconnecting an
> existing morph?  I want the blue handles to appear only on morphs that are
> allowed to be connected by my connector and can't figure out how to do this
> (currently the morphs in my application don't even show these handles, so
> one question is what determines whether the handles appear? I may have
> overriden some mouse event code or...?). I guess the general question is
> "can one make connectors choosy?": with handles that show up only on the
> preferred morphs and only these preferred morph being connectable?

Which handles do you mean?

There are two things that I can think of:

* the curve vertex handles on the Connectors themselves, which can be turned 
on from the menu or a shift-click, and

* the connection highlighting that appears on potential connection 
destinations when you're dragging a Connector end. These show the potential 
attachment points on the morph.

I suspect you're talking about the second one. What you need to look at is:

Morph>>wantsAttachmentFromEnd: index ofConnector: aConnector

and

NCConnectorMorph>>wantsToAttachEnd: index toMorph: aMorph
NCConnectorMorph>>wantsToDetachEnd: index fromMorph: aMorph

-- 
Ned Konz
http://bike-nomad.com/squeak/