About G-Golf ¶

G-Golf
GNOME: (Guile Object Library for).

Description ¶

G-Golf is a Guile¹ Object Library for GNOME.

G-Golf is a tool to develop fast and feature-rich graphical applications, with a clean and recognizable look and feel. Here is an overview of the GNOME platform libraries, accessible using G-Golf.

In particular, libadwaita provides a number of widgets that change their layout based on the available space. This can be used to make applications adapt their UI between desktop and mobile devices. The GNOME Web (best known through its code name, Epiphany, is a good example of such an adaptive UI.

G-Golf uses Glib, GObject and GObject Introspection. As it imports a Typelib (a GObject introspectable library), G-Golf defines GObject classes as GOOPS² classes. GObject methods are defined and added to their corresponding generic function. Simple functions are defined as scheme procedures.

Here is an example, an excerpt taken from the peg-solitaire game, that shows the implementation, for the peg-solitaire game, of the GtkApplication activate signal callback in G-Golf:

(define (activate app)
  (let ((window (make <gtk-application-window>
                  #:title "Peg Solitaire"
                  #:default-width 420
                  #:default-height 420
                  #:application app))
        (header-bar (make <gtk-header-bar>))
        (restart (make <gtk-button>
                   #:icon-name "view-refresh-symbolic")))

    (connect restart
             'clicked
             (lambda (bt)
               (restart-game window)))

    (set-titlebar window header-bar)
    (pack-start header-bar restart)
    (create-board window)
    (show window)))

G-Golf comes with some examples, listed on the learn page of the G-Golf web site. Each example comes with a screenshot and has a link that points to its source code, in the G-Golf sources repository.

Savannah ¶

GNU G-Golf also has a project page on Savannah.