init

Initializes GTK.

This function must be called before using any other GTK functions in your GUI applications.

It will initialize everything needed to operate the toolkit. In particular, it will open the default display (see [func@Gdk.Display.get_default ]).

If you are using [class@Gtk.Application], you usually don't have to call this function; the [vfunc@Gio.Application.startup] handler does it for you. Though, if you are using `GApplication` methods that will be invoked before `startup`, such as `local_command_line`, you may need to initialize GTK explicitly.

This function will terminate your program if it was unable to initialize the windowing system for some reason. If you want your program to fall back to a textual interface, call [func@Gtk.init_check] instead.

GTK calls `signal (SIGPIPE, SIG_IGN)` during initialization, to ignore SIGPIPE signals, since these are almost never wanted in graphical applications. If you do need to handle SIGPIPE for some reason, reset the handler after init, but notice that other libraries (e.g. libdbus or gvfs) might do similar things.