Re: EXC_BAD_ACCESS [was: persistent listeners]

[logari81]

On Sun, 2011-03-13 at 11:20 -0400, Ben Abbott wrote:
> On Mar 12, 2011, at 5:06 PM, logari81 wrote:
> 
> > Yes your last change would cancel my intention in my previous change.
> > The idea is that the lines:
> > 
> > ||    if (uimenu->items_to_show ())
> > ||      show_menubar ();
> > ||    else
> > ||      hide_menubar ();
> > 
> > should be before the first allocation of the canvas:
> > 
> > ||      // This allows us to have a valid OpenGL context right away.
> > ||      canvas->mode (FL_DEPTH | FL_DOUBLE );
> > ||      if (fp.is_visible ())
> > ||        {
> > ||          show ();
> > ||          if (fp.get_currentaxes ().ok())
> > ||            show_canvas ();
> > ||          else
> > ||            hide_canvas ();
> > ||        }
> > 
> > otherwise, at least with my fltk version, the first time anything is
> > plotted is vertically shifted by the menu bar height which was very
> > annoying.
> > 
> > So we have to find some other solution. Maybe Shai could give us a hint.
> > 
> > Kostas
> 
> I'm not certain, but it sounds like a problem I have seen on MacOS.
> 
> In my case, I was unable to see the menu bar and the status bar at the same 
> time. In each of these cases, the plot was shifted vertically.
> 
> I was able to fix this by uninstalling fltk-aqua-1.1.10. The package for 
> fltk-aqua-shlibs-1.1.10 remains installed.
> 
> Ben

hmm, should I revert the first half of my problematic changeset in hg
until we find a better solution?

Unfortunately I do not have a deep understanding of how fltk+OpenGL
works so that I can propose a reliable way for fixing these canvas
initialization issues.

Kostas