[PD-dev] [PD] Trying to track a ghost pdtk_canvas_getscroll call

Ivica Ico Bukvic ico at vt.edu
Thu Nov 18 17:46:17 CET 2010

Never mind... My brain finally decided to get out of bed and join me in
my office... Apologies for spam...

On Thu, 2010-11-18 at 11:22 -0500, Ivica Ico Bukvic wrote:
> Hi all,
> I have a real pickle in trying to debug Pd. Namely, when I grep-ed every
> single instance of pdtk_canvas_getscroll and commented it out, it still
> gets invoked somehow and I am at a loss how. I know it occurs as many
> times as there are objects selected that have been moved (so it is
> definitely per-object) 
> The only thing I managed to isolate so far is the following code:
> g_editor.c
> void gobj_displace(t_gobj *x, t_glist *glist, int dx, int dy)
> {
>     if (x->g_pd->c_wb && x->g_pd->c_wb->w_displacefn)
>         (*x->g_pd->c_wb->w_displacefn)(x, glist, dx, dy);
> }
> I am however unable to decipher what function is exactly being called by
> (*x->g_pd->c_wb->w_displacefn). I only found in g_canvas.h definition of
> w_displacefn as part of _widgetbehavior struct but nowhere (except in
> iemgui objects) is it linked to anything I can actually understand.
> Where does this struct get initialized?
> Any help on this one would be most appreciated as that will put a stop
> on me pulling my hairs out :-)
> Best wishes,
> Ico
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