Library: Port 'Tab View' to Python (#737)

Author: UrtsiSantsi

src/Library/demos/Tab View/main.py

@@ -0,0 +1,38 @@
+import gi
+
+gi.require_version("Gtk", "4.0")
+gi.require_version("Adw", "1")
+from gi.repository import Gtk, Adw
+import workbench
+
+tab_view: Adw.TabBar = workbench.builder.get_object("tab_view")
+button_new_tab: Gtk.Button = workbench.builder.get_object("button_new_tab")
+overview: Adw.TabOverview = workbench.builder.get_object("overview")
+button_overview: Gtk.Button = workbench.builder.get_object("button_overview")
+tab_count = 1
+
+overview.connect("create-tab", lambda _: add_page())
+
+button_overview.connect("clicked", lambda _: overview.set_open(True))
+
+button_new_tab.connect("clicked", lambda _: add_page())
+
+
+def add_page():
+    global tab_count
+    title = f"Tab {tab_count}"
+    page = create_page(title)
+    tab_page = tab_view.append(page)
+    tab_page.set_title(title)
+    tab_page.set_live_thumbnail(True)
+
+    tab_count += 1
+    return tab_page
+
+
+def create_page(title):
+    page = Adw.StatusPage(
+        title=title,
+        vexpand=True,
+    )
+    return page