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<pre><span class="comment"> /****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/</span>
<span class="comment"> /****************************************************************************
**
** This is a simple QGLWidget displaying an openGL wireframe box
**
** The OpenGL code is mostly borrowed from Brian Pauls "spin" example
** in the Mesa distribution
**
****************************************************************************/</span>
#include "glbox.h"
#include <QAxAggregated>
#include <QUuid>
#include <objsafe.h>
#if defined(Q_CC_MSVC)
#pragma warning(disable:4305) <span class="comment">// init: truncation from const double to float</span>
#endif
<span class="comment"> /*!
Create a GLBox widget
*/</span>
GLBox::GLBox( QWidget* parent, const char* name )
: QGLWidget( parent )
{
xRot = yRot = zRot = 0.0; <span class="comment">// default object rotation</span>
scale = 1.25; <span class="comment">// default object scale</span>
object = 0;
}
<span class="comment"> /*!
Release allocated resources
*/</span>
GLBox::~GLBox()
{
makeCurrent();
glDeleteLists( object, 1 );
}
<span class="comment"> /*!
Paint the box. The actual openGL commands for drawing the box are
performed here.
*/</span>
void GLBox::paintGL()
{
glClear( GL_COLOR_BUFFER_BIT );
glLoadIdentity();
glTranslatef( 0.0, 0.0, -10.0 );
glScalef( scale, scale, scale );
glRotatef( xRot, 1.0, 0.0, 0.0 );
glRotatef( yRot, 0.0, 1.0, 0.0 );
glRotatef( zRot, 0.0, 0.0, 1.0 );
glCallList( object );
}
<span class="comment"> /*!
Set up the OpenGL rendering state, and define display list
*/</span>
void GLBox::initializeGL()
{
qglClearColor(Qt::black); <span class="comment">// Let OpenGL clear to black</span>
object = makeObject(); <span class="comment">// Generate an OpenGL display list</span>
glShadeModel( GL_FLAT );
}
<span class="comment"> /*!
Set up the OpenGL view port, matrix mode, etc.
*/</span>
void GLBox::resizeGL( int w, int h )
{
glViewport( 0, 0, (GLint)w, (GLint)h );
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 15.0 );
glMatrixMode( GL_MODELVIEW );
}
<span class="comment"> /*!
Generate an OpenGL display list for the object to be shown, i.e. the box
*/</span>
GLuint GLBox::makeObject()
{
GLuint list;
list = glGenLists( 1 );
glNewList( list, GL_COMPILE );
qglColor(Qt::white); <span class="comment">// Shorthand for glColor3f or glIndex</span>
glLineWidth( 2.0 );
glBegin( GL_LINE_LOOP );
glVertex3f( 1.0, 0.5, -0.4 );
glVertex3f( 1.0, -0.5, -0.4 );
glVertex3f( -1.0, -0.5, -0.4 );
glVertex3f( -1.0, 0.5, -0.4 );
glEnd();
glBegin( GL_LINE_LOOP );
glVertex3f( 1.0, 0.5, 0.4 );
glVertex3f( 1.0, -0.5, 0.4 );
glVertex3f( -1.0, -0.5, 0.4 );
glVertex3f( -1.0, 0.5, 0.4 );
glEnd();
glBegin( GL_LINES );
glVertex3f( 1.0, 0.5, -0.4 ); glVertex3f( 1.0, 0.5, 0.4 );
glVertex3f( 1.0, -0.5, -0.4 ); glVertex3f( 1.0, -0.5, 0.4 );
glVertex3f( -1.0, -0.5, -0.4 ); glVertex3f( -1.0, -0.5, 0.4 );
glVertex3f( -1.0, 0.5, -0.4 ); glVertex3f( -1.0, 0.5, 0.4 );
glEnd();
glEndList();
return list;
}
<span class="comment"> /*!
Set the rotation angle of the object to \e degrees around the X axis.
*/</span>
void GLBox::setXRotation( int degrees )
{
xRot = (GLfloat)(degrees % 360);
updateGL();
}
<span class="comment"> /*!
Set the rotation angle of the object to \e degrees around the Y axis.
*/</span>
void GLBox::setYRotation( int degrees )
{
yRot = (GLfloat)(degrees % 360);
updateGL();
}
<span class="comment"> /*!
Set the rotation angle of the object to \e degrees around the Z axis.
*/</span>
void GLBox::setZRotation( int degrees )
{
zRot = (GLfloat)(degrees % 360);
updateGL();
}
class ObjectSafetyImpl : public QAxAggregated,
public IObjectSafety
{
public:
ObjectSafetyImpl() {}
long queryInterface( const QUuid &iid, void **iface )
{
*iface = 0;
if ( iid == IID_IObjectSafety )
*iface = (IObjectSafety*)this;
else
return E_NOINTERFACE;
AddRef();
return S_OK;
}
QAXAGG_IUNKNOWN;
HRESULT WINAPI GetInterfaceSafetyOptions( REFIID riid, DWORD *pdwSupportedOptions, DWORD *pdwEnabledOptions )
{
*pdwSupportedOptions = INTERFACESAFE_FOR_UNTRUSTED_DATA | INTERFACESAFE_FOR_UNTRUSTED_CALLER;
*pdwEnabledOptions = INTERFACESAFE_FOR_UNTRUSTED_DATA | INTERFACESAFE_FOR_UNTRUSTED_CALLER;
return S_OK;
}
HRESULT WINAPI SetInterfaceSafetyOptions( REFIID riid, DWORD pdwSupportedOptions, DWORD pdwEnabledOptions )
{
return S_OK;
}
};
QAxAggregated *GLBox::createAggregate()
{
return new ObjectSafetyImpl();
}</pre>
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