/****************************************************************************

**

** 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.

**

**

**

** $QT_END_LICENSE$

**

****************************************************************************/

/****************************************************************************

**

** 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

**

****************************************************************************/

#include "glbox.h"

#include <QAxAggregated>

#include <QUuid>

//! [0]

#include <objsafe.h>

//! [0]

#if defined(Q_CC_MSVC)

#pragma warning(disable:4305) // init: truncation from const double to float

#endif

/*!

  Create a GLBox widget

*/

GLBox::GLBox( QWidget* parent, const char* name )

    : QGLWidget( parent )

{

    xRot = yRot = zRot = 0.0;		// default object rotation

    scale = 1.25;			// default object scale

    object = 0;

}

/*!

  Release allocated resources

*/

GLBox::~GLBox()

{

    makeCurrent();

    glDeleteLists( object, 1 );

}

/*!

  Paint the box. The actual openGL commands for drawing the box are

  performed here.

*/

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 );

}

/*!

  Set up the OpenGL rendering state, and define display list

*/

void GLBox::initializeGL()

{

    qglClearColor(Qt::black); 		// Let OpenGL clear to black

    object = makeObject();		// Generate an OpenGL display list

    glShadeModel( GL_FLAT );

}

/*!

  Set up the OpenGL view port, matrix mode, etc.

*/

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 );

}

/*!

  Generate an OpenGL display list for the object to be shown, i.e. the box

*/

GLuint GLBox::makeObject()

{	

    GLuint list;

    list = glGenLists( 1 );

    glNewList( list, GL_COMPILE );

    qglColor(Qt::white);		      // Shorthand for glColor3f or glIndex

    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;

}

/*!

  Set the rotation angle of the object to \e degrees around the X axis.

*/

void GLBox::setXRotation( int degrees )

{

    xRot = (GLfloat)(degrees % 360);

    updateGL();

}

/*!

  Set the rotation angle of the object to \e degrees around the Y axis.

*/

void GLBox::setYRotation( int degrees )

{

    yRot = (GLfloat)(degrees % 360);

    updateGL();

}

/*!

  Set the rotation angle of the object to \e degrees around the Z axis.

*/

void GLBox::setZRotation( int degrees )

{

    zRot = (GLfloat)(degrees % 360);

    updateGL();

}

//! [1]

class ObjectSafetyImpl : public QAxAggregated, 

			 public IObjectSafety

{

public:

//! [1] //! [2]

    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;

    }

//! [2] //! [3]

    QAXAGG_IUNKNOWN;

//! [3] //! [4]

    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;

    }

};

//! [4] //! [5]

QAxAggregated *GLBox::createAggregate()

{

    return new ObjectSafetyImpl();

}

//! [5]