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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\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://qt.nokia.com/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)
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 the default factory as provided by the
QAXFACTORY_DEFAULT macro to expose the \c GLBox widget as an ActiveX
control.
\snippet examples/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 examples/activeqt/opengl/main.cpp 1
\snippet examples/activeqt/opengl/main.cpp 2
\snippet examples/activeqt/opengl/main.cpp 3
The \c GLBox class inherits from both the \l QGLWidget class to be able
to render OpenGL, and from \l QAxBindable.
\snippet examples/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 examples/activeqt/opengl/glbox.h 1
The rest of the class declaration and the implementation of the OpenGL
rendering is identical to the original "box" example.
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 examples/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 examples/activeqt/opengl/glbox.cpp 1
The class declares a default constructor, and implements the queryInterface
function to support the IObjectSafety interface.
\snippet examples/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 examples/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 examples/activeqt/opengl/glbox.cpp 4
The implementation of the \c createAggregate() function just returns a new
\c ObjectSafetyImpl object.
\snippet examples/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).
\snippet doc/src/examples/activeqt/opengl-demo.qdocinc 0
*/
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