list-image-async.py

import os.path
import sys
from gi.repository import Gtk, GdkPixbuf

import signal
signal.signal(signal.SIGINT, signal.SIG_DFL)

path = sys.argv[1]


def cell_data_func(column, cell, model, iter, data):
    path, pb = model.get(iter, 0, 1)

    if pb is None:
        print("Loading %s" % path)
        pb = GdkPixbuf.Pixbuf.new_from_file_at_size(path, 60, 60)
        model.set(iter, 1, pb)

    cell.set_property('pixbuf', pb)


store = Gtk.ListStore(str, GdkPixbuf.Pixbuf)

renderer_txt = Gtk.CellRendererText()
renderer_pb = Gtk.CellRendererPixbuf()

view = Gtk.TreeView()
view.set_model(store)
column_pb  = Gtk.TreeViewColumn("Image")
column_pb.pack_start(renderer_pb, True)
column_pb.set_cell_data_func(renderer_pb, cell_data_func)
view.append_column(column_pb)

column_txt = Gtk.TreeViewColumn("Path",  renderer_txt, text=0)
view.append_column(column_txt)

viewport = Gtk.ScrolledWindow()
viewport.add(view)

window = Gtk.Window()
window.add(viewport)
window.show_all()

for f in os.listdir(path):
    f = os.path.join(path, f)
    store.append((f, None))

Gtk.main()