Fix bug with inline menus

Fixes #44

blueprintcompiler/language/gtk_menu.py

@@ -19,12 +19,12 @@
 
 
 from .attributes import BaseAttribute
-from .gobject_object import ObjectContent
+from .gobject_object import Object, ObjectContent
 from .ui import UI
 from .common import *
 
 
-class Menu(AstNode):
+class Menu(Object):
     def emit_xml(self, xml: XmlEmitter):
         xml.start_tag(self.tokens["tag"], id=self.tokens["id"])
         for child in self.children:

tests/sample_errors/assign_inline_menu.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+Button {
+  label: menu {};
+}

tests/sample_errors/assign_inline_menu.err

@@ -0,0 +1 @@
+4,3,15,Cannot assign Gio.MenuModel to string

tests/samples/inline_menu.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+MenuButton {
+  menu-model: menu primary_menu {};
+}

tests/samples/inline_menu.ui

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <object class="GtkMenuButton">
+    <property name="menu-model">
+      <menu id="primary_menu"></menu>
+    </property>
+  </object>
+</interface>

tests/test_samples.py

@@ -124,6 +124,7 @@ class TestSamples(unittest.TestCase):
         self.assert_sample("file_filter")
         self.assert_sample("flags")
         self.assert_sample("id_prop")
+        self.assert_sample("inline_menu")
         self.assert_sample("layout")
         self.assert_sample("menu")
         self.assert_sample("object_prop")
@@ -146,6 +147,7 @@ class TestSamples(unittest.TestCase):
         self.assert_sample_error("a11y_prop_dne")
         self.assert_sample_error("a11y_prop_obj_dne")
         self.assert_sample_error("a11y_prop_type")
+        self.assert_sample_error("assign_inline_menu")
         self.assert_sample_error("action_widget_float_response")
         self.assert_sample_error("action_widget_have_no_id")
         self.assert_sample_error("action_widget_multiple_default")