Re: Canvas basics

[Roger Leigh <rleigh whinlatter ukfsn org>]

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Roger Leigh <rleigh whinlatter ukfsn org> writes:

> I've started to cook up an example to demonstrate what I'm doing.
> It's here: http://www.whinlatter.ukfsn.org/gtk/cse-0.1.1.tar.gz
> Unfortunately, it crashes when constructing my canvas.  Is it not
> possible to use it until it's realised, or am I so tired I'm doing
> something really stupid?!  (I'm deriving a CseCanvas from GnomeCanvas,
> but the segfault is in my object_init function where I call
> gnome_canvas_set_scroll_region().)

This appears to be the case.  It works fine if I move the call to
after I pack it into a ScrolledWindow and show it.  Is there any way
to find out which methods can be called at which point?  What's the
best way to defer this?  I can see "map", "map-event" and "realize"
signals; which is most appropriate?


Thanks,
Roger

- -- 
Roger Leigh
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