Hi, Childtype is the best way, but there are some issues. As you can see some containers have more children than specified, because they are internal controls. Unfortunately there is no way how to know if a class has internal controls without actually create the container. We still need to add that support.
Meanwhile you can check if it is one of these containers: detachbox, expander, flatscrollbox, sbox, spin, split. They are the only containers that have internal controls. Split can have two children, and all the others can have only one. Actually, I just check, you can safely assume that any class that has childtype > IUP_CHILDMANY, can contain only 1 possible regular child. The other children are internal. With the exception of IupSplit that can have 2 regular children. Best, Scuri Em seg, 29 de out de 2018 às 14:18, Matthew Kennedy <burnsid...@gmail.com> escreveu: > Hello, > > While creating a programmatic language binding for IUP using the > Internal SDK, I ran into a case where some containers include a canvas > as part of the Iclass childcount. I was hoping to use childtype as a > way to determine whether the language binding should accept a single > child, list of children or some fixed number of children as argument > lists, but I'll be off-by-one in some cases where IUP provides a > canvas. > > e.g. in C: > > Ihandle* IupSbox(Ihandle* child); > > i.e. 1 child > > But childtype = IUP_CHILDMANY+2; /* canvas+child */ > > i.e. 2 children > > I can special-case these, but I was looking for a more robust way for > the programmatic language binding. Is there some other way to deduce > the maximum number of "user-provided" children? I had started looking > into Iclass's format field (used by LED, it seems)... Is that my best > bet? > > Thanks, > > Matt > > > _______________________________________________ > Iup-users mailing list > Iup-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/iup-users >
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