gdk_window_set_background_rgba will queue a redraw on its own. Either set the background once when you create the GdkWindow, or paint the background manually with cairo.
On Mon, Nov 4, 2013 at 10:15 AM, onetmt <one...@gmail.com> wrote: > Il 04/11/2013 15:24, Jasper St. Pierre ha scritto: > > Hm. This shouldn't be happening. What version of GTK+3 are you using, > > and can you produce a small reproducible example[0] ? > > > > [0] http://sscce.org/ > > > Please, find the attached example. I can get what I think is the right > behaviour by commenting the call to the drawing function in > on_daCairo_draw() callback, but when I have any cairo_ action, the > result is an infinite firing. > > Release I'm currently using is 3.8.4 (Debian testing current version). > > > > > On Mon, Nov 4, 2013 at 9:18 AM, onetmt <one...@gmail.com > > <mailto:one...@gmail.com>> wrote: > > > > Il 04/11/2013 15:06, Jasper St. Pierre ha scritto: > > > Connect to the "draw" signal on the widget to do your drawing, and > > call > > > gtk_widget_queue_redraw(); on the widget if you want to request a > > redraw. > > > > > This is what I'm currently doing (I've connected to "draw" signal of > a > > GtkDrawingArea), but the problem is that I have the "draw" event > fired > > continuosly. > > > > > > > > > > On Mon, Nov 4, 2013 at 9:02 AM, onetmt <one...@gmail.com > > <mailto:one...@gmail.com> > > > <mailto:one...@gmail.com <mailto:one...@gmail.com>>> wrote: > > > > > > I'm currently in the process of porting to gtk+-3 an old finite > > > difference calculation application; this application had a > > custom graph > > > drawing routine based on gdk_ subsystem that cannot be > > compiled anymore > > > against new gtk3 api :( . I succesfully converted every gdk_ > > invocation > > > in their cairo_ counterparts, but now I have to substitute the > > no longer > > > available "expose-event" with the new "draw" event. The > > problem is that > > > it runs continuosly in an infinite loop. > > > > > > What is the expected mechanism of this new event? How can I > > refresh the > > > graph in a clean way as in old expose-event? > > > > > > TIA > > > > > > -- > > > Hofstadter's Law: > > > "It always takes longer than you expect, even when you take > > into account > > > Hofstadter's Law." > > > _______________________________________________ > > > gtk-list mailing list > > > gtk-list@gnome.org <mailto:gtk-list@gnome.org> > > <mailto:gtk-list@gnome.org <mailto:gtk-list@gnome.org>> > > > https://mail.gnome.org/mailman/listinfo/gtk-list > > > > > > > > > > > > > > > -- > > > Jasper > > > > > > -- > > Hofstadter's Law: > > "It always takes longer than you expect, even when you take into > account > > Hofstadter's Law." > > _______________________________________________ > > gtk-list mailing list > > gtk-list@gnome.org <mailto:gtk-list@gnome.org> > > https://mail.gnome.org/mailman/listinfo/gtk-list > > > > > > > > > > -- > > Jasper > > > -- > Hofstadter's Law: > "It always takes longer than you expect, even when you take into account > Hofstadter's Law." > > _______________________________________________ > gtk-list mailing list > gtk-list@gnome.org > https://mail.gnome.org/mailman/listinfo/gtk-list > > -- Jasper
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