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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-opengl.html
\title OpenGL in an HTML page
\raw HTML
<SCRIPT LANGUAGE="JavaScript">
function setRot( form )
{
GLBox.setXRotation( form.XEdit.value );
GLBox.setYRotation( form.YEdit.value );
GLBox.setZRotation( form.ZEdit.value );
}
</SCRIPT>
<p />
An OpenGL scene:<br />
<object ID="GLBox" CLASSID="CLSID:5fd9c22e-ed45-43fa-ba13-1530bb6b03e0"
CODEBASE="http://www.qt-project.org/demos/openglax.cab">
[Object not available! Did you forget to build and register the server?]
</object><br />
<form>
Rotate the scene:<br />
X:<input type="edit" ID="XEdit" value="0" /><br />
Y:<input type="edit" name="YEdit" value="0" /><br />
Z:<input type="edit" name="ZEdit" value="0" /><br />
<input type="button" value="Set" onClick="setRot(this.form)" />
</form>
\endraw
*/
/*!
\example activeqt/opengl
\title OpenGL Example (ActiveQt)
\brief The OpenGL example demonstrates the use of the default factory
and QAxFactory::isServer(), and the implementation of an
additional COM interface using QAxBindable and QAxAggregated.
The server executable can run both as an ActiveX server and as a
stand-alone application.
The ActiveX control in this example uses the QGlWidget class in
Qt to render an OpenGL scene in an ActiveX. The control exposes a few
methods to change the scene.
The application uses QAxFactory through the \c QAXFACTORY_BEGIN(),
\c QAXCLASS() and \c QAXFACTORY_END() macros to expose the
\c GLBox widget as an ActiveX control.
\snippet activeqt/opengl/main.cpp 0
The implementation of \c main initializes the QApplication object,
and uses \c QAxFactory::isServer() to determine whether or not it is
appropriate to create and show the application interface.
\snippet activeqt/opengl/main.cpp 1
\snippet activeqt/opengl/main.cpp 2
\snippet activeqt/opengl/main.cpp 3
The \c GLBox class inherits from both the \l QOpenGLWidget class to be able
to render OpenGL, and from \l QAxBindable.
\snippet activeqt/opengl/glbox.h 0
The class reimplements the \l QAxBindable::createAggregate() function from QAxBindable
to return the pointer to a \l QAxAggregated object.
\snippet activeqt/opengl/glbox.h 1
The implementation file of the \c GLBox class includes the \c objsafe.h
system header, in which the \c IObjectSafety COM interface is defined.
\snippet activeqt/opengl/glbox.cpp 0
A class \c ObjectSafetyImpl is declared using multiple inheritance
to subclass the QAxAggregated class, and to implement the IObjectSafety
interface.
\snippet activeqt/opengl/glbox.cpp 1
The class declares a default constructor, and implements the queryInterface
function to support the IObjectSafety interface.
\snippet activeqt/opengl/glbox.cpp 2
Since every COM interface inherits \c IUnknown the \c QAXAGG_IUNKNOWN macro
is used to provide the default implementation of the \c IUnknown interface.
The macro is defined to delegate all calls to \c QueryInterface, \c AddRef
and \c Release to the interface returned by the controllingUnknown() function.
\snippet activeqt/opengl/glbox.cpp 3
The implementation of the \c IObjectSafety interface provides the caller
with information about supported and enabled safety options, and returns
\c S_OK for all calls to indicate that the ActiveX control is safe.
\snippet activeqt/opengl/glbox.cpp 4
The implementation of the \c createAggregate() function just returns a new
\c ObjectSafetyImpl object.
\snippet activeqt/opengl/glbox.cpp 5
To build the example you must first build the QAxServer library.
Then run \c qmake and your make tool in \c
examples/activeqt/wrapper.
The \l{qaxserver-demo-opengl.html}{demonstration} requires your
WebBrowser to support ActiveX controls, and scripting to be
enabled.
In contrast to the other QAxServer examples Internet Explorer will not
open a dialog box to ask the user whether or not the scripting of the GLBox
control should be allowed (the exact browser behaviour depends on the security
settings in the Internet Options dialog).
\input doc/src/examples/opengl-demo.qdocinc
*/
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