Sounds like you are saying that calls to canvas_fixlinesfor()
shouldn't have calls to glist_getcanvas() in them. It seems not very
straightforward, for example, the iemguis included in Pd-vanilla have
this:
canvas_fixlinesfor(glist_getcanvas(x->x_gui.x_glist), (t_text*)x);
.hc
On Jul 14, 2010, at 3:15 PM, Miller Puckette wrote:
I think glist_getcanvas() is only appropriate when getting or changing
properties that are inherited from the containing canvas (whether
visible
or not, for example) -- and many canvas_whatever(canvas, object) or
glist_whatever(canvas, object) calls assume tha the oject is indeed
in that
glist itself (glist is synonym for canvas) and will crash if not.
cheers
Miller
On Wed, Jul 14, 2010 at 01:17:41PM -0400, Hans-Christoph Steiner
wrote:
I've noticed that in GUI objects, its quite common to call the
canvas_* functions using glist_getcanvas(). I also just found out
that this causes a crash in [envgen] when this is done for
canvas_deletelinesfor(). See bug:
http://sourceforge.net/tracker/index.php?func=detail&aid=2842897&group_id=55736&atid=478070
So it seems to me that glist_getcanvas() should not be called on the
glist before sending it to one of these canvas functions. I was
wondering if this is kind of a blanket rule, and we should be
removing
the glist_getcanvas() calls in GUI objects. For example:
unauthorized/cooled~/cooled~.c:
canvas_deletelinesfor( glist_getcanvas(glist), (t_text *)z);
unauthorized/cooled~/cooled~.c:
canvas_fixlinesfor( glist_getcanvas( x->x_glist ), (t_text*)x );
In ggee/gui/w_envgen.h, I fixed the crasher by replacing:
canvas_deletelinesfor(glist_getcanvas(glist), x);
with this:
canvas_deletelinesfor(glist, x);
.hc
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