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guile-gi: Using Gtk.show_uri and application:get-active-window

From: Luis Felipe
Subject: guile-gi: Using Gtk.show_uri and application:get-active-window
Date: Fri, 11 Mar 2022 23:59:55 +0000

Hi, I want to display the help of an application on Yelp when users click on 
"MenuButton → Help" or when they press F1. I already have the relevant actions 
connected to a procedure that looks like this:

(define (on-help action app)
  #| Show application manual in Yelp. |#
  (let [(window (get-active-window app))]

    (show-uri window "help:geteka" CURRENT_TIME)))

This fails, however, because there is "No applicable method for generic 
get-active-window", even though I have required GTK 4 and loaded GtkApplication 
by name.¹ Like so:

(require "Gtk" "4.0")
(load-by-name "Gtk" "Application")

This is the backtrace:

In ice-9/boot-9.scm:
  1752:10 10 (with-exception-handler _ _ #:unwind? _ # _)
In unknown file:
           9 (apply-smob/0 #<thunk 7f881c152080>)
In ice-9/boot-9.scm:
    724:2  8 (call-with-prompt _ _ #<procedure default-prompt-handle…>)
In ice-9/eval.scm:
    619:8  7 (_ #(#(#<directory (guile-user) 7f881c158c80>)))
In ice-9/boot-9.scm:
   2835:4  6 (save-module-excursion _)
  4380:12  5 (_)
In geteka.scm:
     21:8  4 (_)
In unknown file:
           3 (application:run #<<GtkApplication> 7f881910d780> ("ge…"))
In geteka/views.scm:
    79:16  2 (on-help _ _)
In oop/goops.scm:
  1567:11  1 (cache-miss #f)
   1585:2  0 (_ _ _)

oop/goops.scm:1585:2: No applicable method for #<<generic> get-active-window 
(1)> in call (get-active-window #f)

Also, I don't know whether I'm using the CURRENT_TIME constant correctly. It is 
part of GDK 4 (GDK_CURRENT_TIME),² which I also required in my module.

For what it's worth, here's the complete code:


Luis Felipe López Acevedo

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