Grid View: Port to Python

src/Grid View/main.py

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+import gi
+
+gi.require_version("Gtk", "4.0")
+gi.require_version("Adw", "1")
+from gi.repository import Gtk
+import workbench
+
+grid_view = workbench.builder.get_object("grid_view")
+add = workbench.builder.get_object("add")
+remove = workbench.builder.get_object("remove")
+
+item = 1
+
+string_model = Gtk.StringList.new(
+    ["Default Item 1", "Default Item 2", "Default Item 3"]
+)
+
+model = Gtk.SingleSelection(model=string_model)
+
+factory_for_grid_view = Gtk.SignalListItemFactory()
+
+
+def on_factory_for_grid_view_setup(_factory, list_item):
+    list_box = Gtk.Box(width_request=160, height_request=160, css_classes=["card"])
+    label = Gtk.Label(halign=Gtk.Align.CENTER, hexpand=True, valign=Gtk.Align.CENTER)
+    list_box.append(label)
+    list_item.set_child(list_box)
+
+
+def on_factory_for_grid_view_bind(_factory, list_item):
+    list_box = list_item.get_child()
+    model_item = list_item.get_item()
+    label_widget = list_box.get_last_child()
+
+    label_widget.set_label(model_item.get_string())
+
+
+factory_for_grid_view.connect("setup", on_factory_for_grid_view_setup)
+factory_for_grid_view.connect("bind", on_factory_for_grid_view_bind)
+
+grid_view.set_model(model)
+grid_view.set_factory(factory_for_grid_view)
+
+
+def on_item_changed(_list, position, removed, added):
+    print(
+        f"position: {position}, Item removed? {removed != 0}, Item added? {added != 0}"
+    )
+
+
+def on_selection_changed(*_):
+    selected_item = model.get_selected()
+    print(f"Model item selected from view: {string_model.get_string(selected_item)}")
+
+
+string_model.connect("items-changed", on_item_changed)
+model.connect("selection-changed", on_selection_changed)
+
+
+def on_add_clicked(*_):
+    global item
+    new_item = f"New item {item}"
+    string_model.append(new_item)
+    item += 1
+
+
+def on_remove_clicked(*_):
+    selected_item = model.get_selected()
+    string_model.remove(selected_item)
+
+
+add.connect("clicked", on_add_clicked)
+remove.connect("clicked", on_remove_clicked)