Port 'Database' demo to Python (#218)

Author: rolandlo

src/Database/main.py

@@ -0,0 +1,143 @@
+import gi
+
+gi.require_version("Gtk", "4.0")
+gi.require_version("Gom", "1.0")
+from gi.repository import GObject, Gom, Gtk, GLib, Gio
+
+import workbench
+
+text_entry = workbench.builder.get_object("text_entry")
+insert_button = workbench.builder.get_object("insert_button")
+search_entry = workbench.builder.get_object("search_entry")
+column_view = workbench.builder.get_object("column_view")
+column_text = workbench.builder.get_object("column_text")
+column_id = workbench.builder.get_object("column_id")
+
+
+class ItemClass(Gom.Resource):
+    id = GObject.Property(
+        type=int,
+        nick="ID",
+        blurb="An ID",
+        flags=GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT,
+        minimum=0,
+        maximum=GLib.MAXINT32,
+        default=0,
+    )
+    text = GObject.Property(
+        type=str,
+        nick="Text",
+        blurb="Some Text",
+        flags=GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT,
+        default="",
+    )
+
+
+data_model = Gio.ListStore(item_type=ItemClass)
+adapter = None
+repository = None
+
+
+def migrate_cb(repository, result):
+    _res = repository.automatic_migrate_finish(result)
+
+
+def open_cb(adapter, result):
+    global repository
+    _res = adapter.open_finish(result)
+    repository = Gom.Repository(adapter=adapter)
+
+    # Set up table and primary key
+    ItemClass.set_table("items")
+    ItemClass.set_primary_key("id")
+
+    # Perform automatic migration
+    repository.automatic_migrate_async(1, [ItemClass], migrate_cb)
+
+
+def init_database():
+    global adapter
+    adapter = Gom.Adapter()
+    adapter.open_async(workbench.resolve("db.sqlite"), open_cb)
+
+
+def save_cb(item, result):
+    success = item.save_finish(result)
+    if not success:
+        print("Failed to insert")
+        return
+
+    load()
+
+
+def on_insert():
+    text = text_entry.get_text()
+    item = ItemClass(repository=repository, text=text)
+    item.save_async(save_cb)
+
+
+def fetch_cb(resource_group, result):
+    _res = resource_group.fetch_finish(result)
+    for i in range(resource_group.get_count()):
+        item = resource_group.get_index(i)
+        if item:
+            data_model.append(item)
+
+
+def find_cb(repository, result):
+    resource_group = repository.find_finish(result)
+    resource_group.fetch_async(0, resource_group.get_count(), fetch_cb)
+
+
+def load():
+    text = search_entry.get_text() or ""
+
+    data_model.remove_all()
+    # Create a filter for Text matching
+    filter = Gom.Filter.new_glob(ItemClass, "text", f"*{text}*")
+    repository.find_async(ItemClass, filter, find_cb)
+
+
+column_text.get_factory().connect(
+    "setup",
+    lambda _self, list_item: list_item.set_child(
+        Gtk.Label(margin_start=12, margin_end=12)
+    ),
+)
+
+
+def column_text_bind_cb(_self, list_item):
+    label_widget = list_item.get_child()
+    model_item = list_item.get_item()
+    label_widget.set_label(model_item.text)
+
+
+column_text.get_factory().connect("bind", column_text_bind_cb)
+
+column_id.get_factory().connect(
+    "setup",
+    lambda _self, list_item: list_item.set_child(
+        Gtk.Label(margin_start=12, margin_end=12)
+    ),
+)
+
+
+def column_id_bind_cb(_self, list_item):
+    label_widget = list_item.get_child()
+    model_item = list_item.get_item()
+    label_widget.set_label(str(model_item.id))
+
+
+column_id.get_factory().connect("bind", column_id_bind_cb)
+
+
+column_view.set_model(Gtk.SingleSelection(model=data_model))
+
+try:
+    init_database()
+    search_entry.connect("search-changed", lambda *_: load())
+
+    insert_button.connect("clicked", lambda *_: on_insert())
+    # load()
+except Exception as err:
+    print(err)