🚀 go-pugleaf

I have been experimenting with porting Unidraw to InterViews Plus
and have currently run into an obstacle which to a starter in the 
knowledge of IV class hierarchies seems unsurmountable. Any help/
pointers will be appreciated.

Here is the description:
------------------------

I am able to get the motif look into the idraw application quite easily. 
I compiled all classes not supported by InterViews Plus into auxilliary
libraries - using the header files of InterViews Plus and compiled idraw
with the IV Plus and these auxilliary libraries. Basically involved 
defining some application specific variables and modifying different
Makefiles/Imakefiles - quite straightforward.

Now the bad part:
-----------------

None of the pulldown menus of idraw work. Though the different
commands on the pull down menus are accessible with the key bindings
as defined by Unidraw and the application code for idraw, attempts to
open any pulldown menu (e.g. File, Edit, etc.) leads to core dumps :-(
- sulk sulk

One solution I tried:
---------------------

As per advise from some engineers at HP I eliminated all key bindings in the
idraw code, recompiled the stuff and ran it. Same result. Core dumps on
trying to exercise a pull down menu.

The confusing part:
-------------------

Comparing idraw against the ted example (compiled using IV Plus)
the only difference I noted was: In idraw the call back function
for different commands is a member function of Command class
(e.g. NewCompCmd::Execute()). This is defined as part of the Unidraw
classes. This gets invoked from the member function
of the interactor for that command (CommandControl::Do()). However,
in ted the call back function is defined as a member function of the
EditorApp class and this is invoked from the function MenuItem::Do() 
for the corresponding item in the PulldownMenu.

Both methods seem correct. I can't understand why idraw should core
dump.

Could a kind soul (Stanford Gurus ??) enlighten this novice.

Anyone else out there who has tried something like this?

Thanks in anticipation.

--- Rajesh

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