Port 'Launcher' demo to Python (#93)

demos/Launcher/main.py

@@ -0,0 +1,67 @@
+import gi
+
+gi.require_version("Gtk", "4.0")
+from gi.repository import GLib, Gio, Gtk
+import workbench
+
+launch_file = workbench.builder.get_object("launch_file")
+file_name = workbench.builder.get_object("file_name")
+file_location = workbench.builder.get_object("file_location")
+change_file = workbench.builder.get_object("change_file")
+uri_launch = workbench.builder.get_object("uri_launch")
+uri_details = workbench.builder.get_object("uri_details")
+
+# File Launcher
+
+file = Gio.File.new_for_uri(workbench.resolve("workbench.txt"))
+file_launcher = Gtk.FileLauncher(
+    always_ask=True,
+    file=file,
+)
+
+
+def on_file_changed(_launcher, _file):
+    details = file_launcher.get_file().query_info(
+        "standard::display-name",
+        Gio.FileQueryInfoFlags.NONE,
+        None,
+    )
+    file_name.set_label(details.get_display_name())
+
+
+def on_uri_changed(_entry):
+    text = uri_details.get_text()
+
+    try:
+        uri_launch.set_sensitive(GLib.Uri.is_valid(text, GLib.UriFlags.NONE))
+    except:
+        uri_launch.set_sensitive(False)
+
+
+def on_file_opened(dialog, result):
+    file = dialog.open_finish(result)
+    file_launcher.set_file(file)
+
+
+launch_file.connect("clicked", lambda _: file_launcher.launch(workbench.window, None))
+
+file_launcher.connect("notify::file", on_file_changed)
+
+file_location.connect(
+    "clicked", lambda _: file_launcher.open_containing_folder(workbench.window, None)
+)
+
+change_file.connect(
+    "clicked", lambda _: Gtk.FileDialog().open(workbench.window, None, on_file_opened)
+)
+
+# URI Launcher
+
+uri_launch.connect(
+    "clicked",
+    lambda _: Gtk.UriLauncher(uri=uri_details.get_text()).launch(
+        workbench.window, None
+    ),
+)
+
+uri_details.connect("changed", on_uri_changed)