[Fwd:] Re: Adding a new diagram type (ORM plug-in)?
- From: Eric Schabell <erics cs kun nl>
- To: discussions about usage and development of dia <dia-list gnome org>
- Subject: [Fwd:] Re: Adding a new diagram type (ORM plug-in)?
- Date: Fri, 10 Sep 2004 14:41:07 +0000
Haven't heard of ORM before, and I've certainly not heard of anyone
working on it. The best sources are the sources (*grin*) and the Dia
TWiki (http://faemalia.org/wiki/view/Technical/DiaEditor). You should be
aware of the difference between shapes and objects, shapes are very easy
to create, but very limited in functionality. You can mix the two in a
sheet.
Making new objects involves a fair amount of boilerplate (ought to make
something that can generate it:), but there's very little that takes
actual though, mostly the drawing part where you have to calculate margins
and other stuff as needed.
Looking at some samples (http://www.orm.net/pdf/ORMwhitePaper.pdf), I
don't see any major problems in implementing this. You'll want to look at
the movable text label (see the FS lines). The fact boxes will need a bit
of work -- if you want arbitrarily many fact connections, it'll be a
little tricky (need PROP_LIST), but if you just want two or three facts,
it can be hardcoded with the little arrows, connection points etc.
One warning: Do not look to the UML Class object for inspiration, it is
horrible.
Hello,
Thanks for the tips, I have already started playing around and thought a
good place to start would be to copy sybase as an orm sheet with three
figures (just renamed existing sybase figure files).
I have added orm code in :
objects/orm
objects/Makefile.am
po/POTFILES.*
shapes/orm
shapes/Makefile.am
sheets/orm.sheet.in
sheets/Makefile.am
I run ./autogen.sh, ./configure and make.
I seem to see the actual plugins being built in objects (no sybase or
orm), all builds ok, no errors and only see sybase as a tab with the
icons. I was hoping to see orm tab... I must be missing something, but
not sure what. Ideas?
Thanks,
erics
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