You can call g_idle_add() and various related functions from a non-GTK thread. This is easier and more reliable than using a timer. When your other thread has finished some work, add an idle callback in the main context. the idle callback should call gtk_queue_redraw() for the appropriate window/widgets.
On Sat, Feb 18, 2017 at 12:47 AM, Eric Cashon via gtk-list < gtk-list@gnome.org> wrote: > Thomas, > > You could implement a worker thread that you can monitor it's progress. > Once it is done, you can update your display. There are some things to keep > in mind when doing this though. You don't want to call GTK functions from > your worker thread. If you are drawing your results to a cairo surface, you > can draw with your worker thread and when it is all done, update the > surface in your drawing area widget. If you need to keep other data you can > use glib. Having a worker thread will keep your application responsive. > > Some of these concepts are useful for drawing a Mandelbrot fractal so I > put a little demo together if you are interested. It uses a timer to check > when the drawing is done. When it is, it updates the drawing area. It is in > GTK3 but the concepts should be the same for GTK2. Would have to make a few > code changes though for GTK2. > > https://github.com/cecashon/OrderedSetVelociRaptor/blob/ > master/Misc/cairo_drawings/mandelbrot1.c > > Anyways, hope it is of some help. > > Eric > > > > _______________________________________________ > gtk-list mailing list > gtk-list@gnome.org > https://mail.gnome.org/mailman/listinfo/gtk-list > >
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