All right, I missed that! Thank you! Luca 2018-08-14 18:56 GMT+02:00 Emmanuele Bassi <eba...@gmail.com>:
> Hi; > > On Tue, 14 Aug 2018 at 17:30, Luca Bacci via gtk-app-devel-list < > gtk-app-devel-list@gnome.org> wrote: > >> Hi, does anyone know what meaning has the return value from expose event >> handler (for gtk2) and draw signal (for gtk3) of GtkDrawingArea? >> >> When one should return TRUE, and when FALSE? >> >> I can't find any information in the reference manual >> > > The "expose-event" signal in GTK+ 2.x comes from GtkWidget: > > https://developer.gnome.org/gtk2/stable/GtkWidget.html# > GtkWidget-expose-event > > The "draw" signal in GTK+ 3.x comes from GtkWidget: > > https://developer.gnome.org/gtk3/stable/GtkWidget.html#GtkWidget-draw > > They have similar semantics as other signals in GTK+, like the > input-related ones: returning TRUE means "I handled this signal emission, > so do not propagate it further to other signal handlers"; returning FALSE > means "I did not handle this signal emission, so propagate it further to > other signal handlers". > > What "handling" means it depends on what you want to achieve. > > When using GTK+ 3.x, you're strongly encouraged to use the symbolic > constants "GDK_EVENT_PROPAGATE" and "GDK_EVENT_STOP", instead, as they make > the code easier to read. > > Ciao, > Emmanuele. > > -- > https://www.bassi.io > [@] ebassi [@gmail.com] > _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org https://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
