Gtk Picture not updating

[FrancescoCaracciolo]

I’m writing a Python Application in GTK4 + Adwaita with Flatpak and Gnome runtime version 47.
The relevant code is here

NyarchLinux/NyarchAssistant/blob/d7219ede220c22993fae640245c56f9426491636/src/avatar.py#L370

The code is supposed to change ~3 images at ~10FPS to create an animation.
The problem is that the image does not update. When I open the inspector, I can clearly see the attribute changing, also, when I open it the image actually change for some seconds.
If I switch to GtkImage, everything works, however the image is not upscaled to adapt to its container.

How can I fix this? I remember it working on Gnome Platform 46

[rafaelmardojai (Rafael Mardojai CM)]

Not a direct answer to your question, but you probably want to implement a custom Gdk.Paintable and do the animation there.

For reference here you can find a simple Gdk.Paintable in Python for a GIF image:

Python: How do you implement a Paintable for GIF animations?

Here’s you paintable updated to work: from gi.repository import GLib, Gdk, GdkPixbuf, GObject class GifPaintable(GObject.Object, Gdk.Paintable): def __init__(self, path): super().__init__() self.animation = GdkPixbuf.PixbufAnimation.new_from_file(path) self.iterator = self.animation.get_iter() self.delay = self.iterator.get_delay_time() self.timeout = GLib.timeout_add(self.delay, self.on_delay) self.invalidate_contents() def on_delay(se…

But in your case I think you can avoid GdkPixbuf and create a Gdk.Texture for each frame.

[jspast (João Pastorello)]

So it seems this has already been fixed but the Flatpak Runtime has not been updated with it. I am not sure where to report this