# Non REPL Usage

If you're using Gtk from command-line scripts, one problem you may encounter is that Julia quits before you have a chance to see or interact with your windows. In such cases, the following design pattern can be helpful:

win = Window("gtkwait")

# Put your GUI code here

if !isinteractive()
c = Condition()
signal_connect(win, :destroy) do widget
notify(c)
end
@async Gtk.gtk_main()
wait(c)
end

By waiting on a Condition, Julia will keep running. This pattern allows for multiple events to trigger the condition, such as a button press, or one of many windows to be closed. Program flow will resume at wait line, after which it would terminate in this example.

In the common case we simply wish to wait for a single window to be closed, this can be shortened by using waitforsignal:

win = Window("gtkwait")

# Put your GUI code here

if !isinteractive()
@async Gtk.gtk_main()
Gtk.waitforsignal(win,:destroy)
end