fix nested functiongui show

magicgui/widgets/_function_gui.py

@@ -80,7 +80,9 @@ class FunctionGui(Container, Generic[_R]):
     app : magicgui.Application or str, optional
         A backend to use, by default ``None`` (use the default backend.)
     visible : bool, optional
-        Whether to immediately show the widget, by default False
+        Whether to immediately show the widget.  If ``False``, widget is explicitly
+        hidden.  If ``None``, widget is not shown, but will be shown if a parent
+        container is shown, by default None.
     auto_call : bool, optional
         If True, changing any parameter in either the GUI or the widget attributes
         will call the original function with the current settings. by default False
@@ -113,7 +115,7 @@ def __init__(
         labels: bool = True,
         tooltips: bool = True,
         app: AppRef = None,
-        visible: bool = False,
+        visible: bool = None,
         auto_call: bool = False,
         result_widget: bool = False,
         param_options: dict[str, dict] | None = None,

tests/test_widgets.py

@@ -487,6 +487,20 @@ def test_range_widget_min():
     assert (v.start, v.stop, v.step) == (0, 1000, 5)
 
 
+def test_containers_show_nested_containers():
+    """make sure showing a container shows a nested FunctionGui."""
+
+    @magicgui
+    def func(x: int, y: str):
+        pass
+
+    assert not func.visible
+    c2 = widgets.Container(widgets=[func])
+    assert not c2.visible
+    c2.show()
+    assert c2.visible and func.visible
+
+
 def test_file_dialog_events():
     """Test that file dialog events emit the value of the line_edit."""
     from pathlib import Path