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Article #215

Connectors and ibuild?

#215
From: Brad Karp
Date: Mon, 10 Aug 1992 22:28
46 lines
2540 bytes
Our configuration:

SUN4, IV 3.0.1, built with g++ using the patches available in contrib/
on interviews.stanford.edu.

(Apologies in advance for asking what may be a trivial question.)

We are using ibuild and Unidraw to implement a user interface to a
network simulator we are building here. Because we are simulating a
network, the idea of using Connectors for the objects on the Canvas is
quite attractive; we'd like to perform dataflow through the connected
components of the network we're simulating.

ibuild's repertoire of Tools for VPanelControl's includes ConnectTool,
whose man page indeed states that this Tool's job is to connect
instances of Connector by manipulation.

However, I can find _no_ mention of a Tool which supports
instantiating a Connector on the Canvas by direct manipulation. Since
Connector is a subclass of GraphicComp, it would seem that all one
would have to do is change the type of the instantiated object to
Connector from GraphicComp, but still use the same member functions of
GraphicComp to initialize the new object. Unfortunately, I see no easy
way to tell ibuild that I want a GraphicCompTool to instantiate "not
just any GraphicComp, but a Connector."

It would seem pointless for ibuild to support connecting Components
which it can't even generate.

Does ibuild have a Tool which generates Connectors? If so, how would I go
about using it, and if not, what would be the easiest way for me to
circumvent its lack of support for this capability?

Also, a more general question:

Are there good, comprehensive references/user guides to InterViews and
Unidraw _other_ than those supplied with the package? (Either
publically available or commercially published ones would be fine.)
While the user guides and tutorials included are somewhat informative,
we find it a bit of a leap from the man pages and guides to writing
"real" InterViews code.

Replies by email to karp@das.harvard.edu preferred; if there's
interest, I'll summarize.

Any advice will be greatly appreciated!
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Message-ID: <1992Aug10.222824.2740@das.harvard.edu>
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Path: arc1-ca.pugleaf.net!sparky!uunet!ogicse!das-news.harvard.edu!usenet
From: karp@virtual9.harvard.edu (Brad Karp)
Newsgroups: comp.windows.interviews
Subject: Connectors and ibuild?
Summary: Shall the twain ever meet?
Keywords: Connector ibuild
Message-ID: <1992Aug10.222824.2740@das.harvard.edu>
Date: 10 Aug 92 22:28:24 GMT
Article-I.D.: das.1992Aug10.222824.2740
Sender: usenet@das.harvard.edu (Network News)
Organization: Aiken Computation Lab, Harvard University
Lines: 46