Re: GTK window winthout main iterator

[James Cameron <quozl laptop org>]

Add your logic to a function given to glib_idle_add(), and to trigger
new drawings call queue_draw and then return from your function.  GTK+
will call your draw signal handler.  As soon as GTK+ is idle again,
your function will be called again.

It isn't the usual way of doing things, but it will work.

On Tue, Sep 04, 2018 at 07:09:13PM -0300, Juan Ignacio Donoso via gtk-app-devel-list wrote:
> I'm trying to create a GUI using gtk.... I already have a loop that runs my
> logic. I was using cairo to draw to a png and flush to /dev/fb0 but now I
> want to instantiate a Gtk::Window to draw on it.
>
> I don't want to run Gtk::Main because just want to trigger new drawings
> when my logic trigger it..
> The app is real only there aren't going to be any interactions from the app
> ui, only from the internal logic I want to draw.
>
> Any idea where to look to implement that approach. I was thinking on using
> Gtk::main_iteration_do with Gtk::Queue_draw. But I'm not getting it work.
>
> Do I need to ask for a cairo context on every on_draw signal call?
> Do I need to "draw" on the "draw" signal?
>
> thanks
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-- 
James Cameron
http://quozl.netrek.org/