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+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
+
+/*!
+    \page qaxserver-demo-hierarchy.html
+    \title Qt Widget Hierarchy
+
+    \input examples/hierarchy-demo.qdocinc
+*/
+
+/*!
+    \example activeqt/hierarchy
+    \title Hierarchy Example (ActiveQt)
+    \ingroup activeqt-examples
+
+    \brief The Hierarchy example is shows how to write an in-process ActiveX
+    control. The control is a QWidget subclass with child widgets
+    that are accessible as sub-types.
+
+    \snippet activeqt/hierarchy/objects.h 0
+    The \c QParentWidget class provides slots to create a widget
+    with a name, and to return a pointer to a named widget. The class
+    declaration uses \c Q_CLASSINFO() to provide the COM identifiers for
+    this class.
+
+    \snippet activeqt/hierarchy/objects.cpp 0
+    The constructor of \c QParentWidget creates a vertical box layout.
+    New child widgets are automatically added to the layout.
+
+    \snippet activeqt/hierarchy/objects.cpp 1
+    The \c createSubWidget slot creates a new \c QSubWidget with
+    the name provided in the parameter, and sets the label to that
+    name. The widget is also shown explicitly.
+
+    \snippet activeqt/hierarchy/objects.cpp 2
+    The \c subWidget slot uses the \c QObject::findChild() function and
+    returns the first child of type \c QSubWidget that has the requested
+    name.
+
+     \snippet activeqt/hierarchy/objects.h 1
+    The \c QSubWidget class has a single string-property \c label,
+    and implements the paintEvent to draw the label. The class uses
+    again \c Q_CLASSINFO to provide the COM identifiers, and also sets
+    the \e ToSuperClass attribute to \e QSubWidget, to ensure that only
+    no slots of any superclasses (i.e. QWidget) are exposed.
+
+    \snippet activeqt/hierarchy/objects.cpp 3
+    \snippet activeqt/hierarchy/objects.cpp 4
+    The implementation of the \c QSubWidget class is self-explanatory.
+
+    \snippet activeqt/hierarchy/main.cpp 0
+    The classes are then exported using a QAxFactory. \c QParentWidget is
+    exported as a full class (which can be created ), while \c QSubWidget is
+    only exported as a type, which can only be created indirectly through
+    APIs of \c QParentWidget.
+
+    To build the example you must first build the QAxServer library.
+    Then run qmake and your make tool in \c activeqt/hierarchy.
+
+    The \l{qaxserver-demo-hierarchy.html}{demonstration} requires
+    your WebBrowser to support ActiveX controls, and scripting to be
+    enabled.
+
+    \snippet activeqt/hierarchy/doc/snippets/hierarchy-demo-snippet.qdoc script
+*/