Re: GNU G-Golf 0.8.0-rc-3 available for testing

David Pirotte <[email protected]> Mon, 6 May 2024 22:39:03 -0300

Newsgroups	gmane.lisp.guile.user
Message-ID	<20240506223903.4651070a@tintin>

Hi Florian,

> ...
> pygobject GTK3 examples are working.  I will experiment and try to
> write Vala/C code that breaks now.

I thought they had Gtk-4 examples as well. But anyway, I cooked a
pygobject version of this drawing-widget example, attached.

Could you:

	install pygobject
	[ run its test-suite ?		- it used to fail, in Guix

Drop this example somewhere:

	chmod a+x drawing-widget.py
	./drawing-widget.py

Thanks,
David

drawing-widget.py (text/x-python, 1.6 KB)

#!/usr/bin/env python3
# -*- mode: python; coding: utf-8 -*-
 
import gi
gi.require_version("Gtk", "4.0")
 
from gi.repository import Gtk, Gdk, Graphene
 
class DrawingWidget(Gtk.Widget):
    def do_snapshot(self, snapshot):
        width = self.get_width() / 2
        height = self.get_height() / 2
        color = Gdk.RGBA()
        
        color.parse("rgba(237, 20, 20, 1.0)")
        snapshot.append_color(
          color,
          # Gdk.RGBA(red=0.18, green=0.8, blue=0.44, alpha=1.0),
          Graphene.Rect.alloc().init(0, 0, width, height)
        )
        
        color.parse("rgba(46, 204, 112, 1.0)")
        snapshot.append_color(
          color,
          # Gdk.RGBA(red=0.18, green=0.8, blue=0.44, alpha=1.0),
          Graphene.Rect.alloc().init(width, 0, width, height)
        )
        
        color.parse("rgba(252, 189, 74, 1.0)")
        snapshot.append_color(
          color,
          # Gdk.RGBA(red=0.18, green=0.8, blue=0.44, alpha=1.0),
          Graphene.Rect.alloc().init(0, height, width, height)
        )
        
        color.parse("rgba(41, 127, 186, 1.0)")
        snapshot.append_color(
          color,
          # Gdk.RGBA(red=0.18, green=0.8, blue=0.44, alpha=1.0),
          Graphene.Rect.alloc().init(width, height, width, height)
        )

def on_activate(app):
    window = Gtk.ApplicationWindow(
        title="Drawing Widget",
        default_width=320,
        default_height=320,
        application=app,
        child=DrawingWidget(hexpand=True, vexpand=True)
    )
    window.present()
 
app = Gtk.Application(application_id='com.example.App')
app.connect('activate', on_activate)
app.run(None)

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