On Thu, Oct 24, 2002 at 09:23:48AM -0500, Lars Clausen wrote:
> The right place to add a checking call would be in
> layer_find_closest_connectionpoint() in app/diagramdata.c. Problem is,
> that loop goes over all objects in a layer, so we can't afford to spend a
> lot of time there. Well, we can keep it within the if, that'll cut out
> most of it. And instead of adding code to DrawFunc, a new object func
> should be defined for it.
OK, I try to resume:
1. A restriction on possible connections seems to be a good
idea. Think of network diagrams, not to speak of
UML/Database/SDL/... code generation.
2. Of course, this must be an option to the user. Maybe a
diagram specific or a global option?
3. The method to check has to be a new object function.
Something like:
typedef gboolean (*AllowConnectFunc) (Object* obj_me,
Object* obj_other,
... /* ? */ );
4. This function will be called twice (once for the
connecting object, once for the connected one) from
layer_find_closest_connectionpoint(). I don't see
performance hits, if functions will be called after
the "if (dist<mindist)" and only if the option is set.
Can somebody help with point 3?
Cheers!
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