Hello anyone,

I have Qt-4.2.3 on WindowsXP
I have made a cube that is rotating on y-axis with a logo on the sides.
I put the cube into QMessageBox but i see only a part of the height of the glWidget.
I have also done this on Linux there i see the compleet cube.
Is this a misbehavior on WindowsXP or i missing something.

my glWidget.cpp
Qt Code: 
  1. #include <QtGui>
  2. #include <QtOpenGL>
  3. #include <QGLWidget>
  4.  
  5. #include <math.h>
  6.  
  7. #include "glwidget.h"
  8.  
  9.  
  10. GLWidget::GLWidget(QWidget *parent)
  11.     : QGLWidget(parent)
  12. {
  13. 	clearColor = Qt::red;
  14.     yRot = 0;
  15.     QTimer *timer = new QTimer(this);
  16.     connect(timer, SIGNAL(timeout()), this, SLOT(animate()));
  17.     timer->start(5);
  18. }
  19.  
  20. GLWidget::~GLWidget()
  21. {
  22.         makeCurrent();
  23.         glDeleteLists(object, 1);
  24. }
  25.  
  26. QSize GLWidget::minimumSizeHint() const
  27. {
  28.     return QSize(50, 50);
  29. }
  30.  
  31. QSize GLWidget::sizeHint() const
  32. {
  33.     return QSize(200, 200);
  34. }
  35.  
  36.  
  37.  
  38. void GLWidget::setClearColor(const QColor &color)
  39. {
  40.     clearColor = color;
  41.     updateGL();
  42. }
  43.  
  44. void GLWidget::initializeGL()
  45. {
  46.  
  47.     object = makeObject();
  48.     glEnable(GL_DEPTH_TEST);
  49.     glEnable(GL_CULL_FACE);
  50.     glEnable(GL_TEXTURE_2D);
  51. }
  52.  
  53. void GLWidget::paintGL()
  54. {
  55.     qglClearColor(clearColor);
  56.     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
  57.     glLoadIdentity();
  58.     glTranslated(0.0, 0.0, -12.0);
  59.     glRotated(yRot, 0.0, 1.0, 0.0);
  60.     glCallList(object);
  61. }
  62.  
  63. void GLWidget::resizeGL(int width, int height)
  64. {
  65.     glViewport(0, 0, width, height);
  66.  
  67. 	glMatrixMode(GL_PROJECTION);
  68.     glLoadIdentity();
  69. 	glOrtho(-0.5, +0.5, +0.5, -0.5, 4.0, 15.0);
  70.     glMatrixMode(GL_MODELVIEW);
  71.     glLoadIdentity();
  72. }
  73.  
  74.  
  75.  
  76. GLuint GLWidget::makeObject()
  77. {
  78.     static const int coords[4][4][3] = {
  79.         { { +1, -1, -1 }, { -1, -1, -1 }, { -1, +1, -1 }, { +1, +1, -1 } },
  80.         { { +1, -1, +1 }, { +1, -1, -1 }, { +1, +1, -1 }, { +1, +1, +1 } },
  81.         { { -1, -1, -1 }, { -1, -1, +1 }, { -1, +1, +1 }, { -1, +1, -1 } },
  82.         { { -1, -1, +1 }, { +1, -1, +1 }, { +1, +1, +1 }, { -1, +1, +1 } }
  83.     };
  84.  
  85.  
  86.     GLuint textures[4];
  87.     for (int j=0; j < 4; ++j)
  88.         textures[j] = bindTexture(QPixmap(QString(":/images/triple%1.png").arg(j + 1)),
  89.                                   GL_TEXTURE_2D);
  90.  
  91.     GLuint list = glGenLists(1);
  92.     glNewList(list, GL_COMPILE);
  93.     for (int i = 0; i < 4; ++i) {
  94.         glBindTexture(GL_TEXTURE_2D, textures[i]);
  95.         glBegin(GL_QUADS);
  96.         for (int j = 0; j < 4; ++j) {
  97.             glTexCoord2d(j == 0 || j == 3, j == 0 || j == 1);
  98.             glVertex3d(0.2 * coords[i][j][0], 0.2 * coords[i][j][1],
  99.                        0.2 * coords[i][j][2]);
  100.         }
  101.         glEnd();
  102.     }
  103.  
  104.     glEndList();
  105.     return list;
  106. }
  107.  
  108. void GLWidget::animate()
  109. {
  110.  
  111.    yRot += 1.0f;
  112.    updateGL();
  113. }
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Part of my MainWindow.cpp
Qt Code: 
  1. void MainWindow::info()
  2. {
  3. 		QMessageBox *mb = new QMessageBox(this);
  4. 		mb->setWindowTitle("Triple/S");
  5. 		mb->setPalette(QPalette(qRgb(255, 255, 255)));
  6. 		mb->setAutoFillBackground(true);
  7. 		mb->setWindowIcon(QIcon(":/images/triple20.png"));
  8. 		glWidget = new GLWidget(mb);
  9. 		mb->setText( " some text....");
  10. 		mb->exec();
  11. }
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I also try glWidget->show(); the same result.
thanks in advance.