GL commands using beginnativepating not working

[moh.gup@gmail.com]

Hi,
I am try to run GL commands inn QGraphicsitem in paint event using beginnavitepaining.But its not working.
when I try GLwidet its work which shows gl support in my system.I need to paint in my graphicsitem.

Please help

[Dong Back Kim]

Hi,
I am try to run GL commands inn QGraphicsitem in paint event using beginnavitepaining.But its not working.
when I try GLwidet its work which shows gl support in my system.I need to paint in my graphicsitem.

Please help

Did you create rendering context by your self within the beginNativePainting()? I guess it's not working because QGraphicsItem does not prepare OpenGL rendering context while QGLWidget does for you.

If you can describe bit more about what is not working (i.e. no refresh) it might be easier to find out the reason.

Regards,
Dong Back Kim

[moh.gup@gmail.com]

Hi,
I am trying to paint in item using garphicssitem

void	item::paint ( QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * widget) 
 {
 
      painter->fillRect(0, 0, 128, 128, Qt::green);
      painter->beginNativePainting();
 
      // Set background clearing color to blue
      glClearColor(0.0f, 0.0f, 1.0f, 1.0f);
      // Clear the window with current clearing color
      glClear(GL_COLOR_BUFFER_BIT);
      // Set drawing color to red, and draw rectangle at
      // current position.
      glColor3f(1.0f, 0.0f, 0.0f);
      glRectf(128, 128, 200, 200);
      //glFlush();
 
      painter->endNativePainting();
 
 }

void	item::paint ( QPainter * painter, const QStyleOptionGraphicsItem * option, QWidget * widget) 
 {
     
      painter->fillRect(0, 0, 128, 128, Qt::green);
      painter->beginNativePainting();

      // Set background clearing color to blue
      glClearColor(0.0f, 0.0f, 1.0f, 1.0f);
      // Clear the window with current clearing color
      glClear(GL_COLOR_BUFFER_BIT);
      // Set drawing color to red, and draw rectangle at
      // current position.
      glColor3f(1.0f, 0.0f, 0.0f);
      glRectf(128, 128, 200, 200);
      //glFlush();

      painter->endNativePainting();

 }

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[moh.gup@gmail.com]

Can any body have idea abt my problem.Its urgent for me