Hi, thanks for looking into this.
If I make them show, as
@show ctgc.iup_canvas
ctgc.iup_canvas = t
@show t
@show ctgc.iup_canvas
it 'shows'
ctgc.iup_canvas => Ptr{cdCanvas} @0x0000000000000000
t => Ptr{cdCanvas} @0x0000000022c6d6c0
ctgc.iup_canvas => Ptr{cdCanvas} @0x0000000022c6d6c0
which shows that type has not changed after the attribution and that it
has the correct return type of cdCreateCanvas().
That is why I initialized the ctgc type with
convert(Ptr{cdCanvas},0)
(see first member in my first post)
quarta-feira, 14 de Janeiro de 2015 às 13:39:21 UTC, Milan Bouchet-Valat
escreveu:
>
> Le mercredi 14 janvier 2015 à 05:32 -0800, J Luis a écrit :
> > Hi,
> > I have had quite some head-aches with types (converted from C structs)
> > but this one wins.
> >
> > I have this type (from IUP)
> >
> >
> > type tCTC
> > iup_canvas::Ptr{cdCanvas}
> > w::Cint
> > h::Cint
> > ...
> >
> > which I initialize as
> >
> > ctgc = tCTC(
> > convert(Ptr{cdCanvas},0),
> > int32(0), int32(0),
> > ...
> >
> > and now the mystery.
> >
> > t = cdCreateCanvas(cdContextIup(), IupGetHandle("cnvMain"))
> > ctgc.iup_canvas = t
> > cdActivate(t);
> > cdActivate(ctgc.iup_canvas);
> >
> >
> > the last line in the chunk above errors with
> >
> >
> > ERROR: `cdActivate` has no method matching cdActivate(::Ptr{cdCanvas})
> > in CDTestInit at C:\programs\Gits\IUP.jl\examples\cdtest_.jl:125
> > in cdtest at C:\programs\Gits\IUP.jl\examples\cdtest_.jl:92
> >
> >
> > So `t` and `ctgc.iup_canvas` are actually two different entities
> > (although their pointers are ofc the same as I can see if I @show
> > them)?
> Well, you need to show us more details, e.g. tell us what
> cdCreateCanvas() does, and what type it returns. The pointers might hold
> the same address, but they still may be of different types. @show should
> make this visible, but without the output we cannot check.
>
>
> Regards
>
>
