Why the result of display is not anti-aliased?

grCanvas derived from QGLWidget.

Code:

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void grCanvas::paintEvent(QPaintEvent* event)
{
	QPainter ipainter(this);
	ipainter.begin(this);
	ipainter.setWindow(QRect(this->translate.X-iMargin,this->translate.Y-iMargin,zoom.X+2*iMargin,zoom.Y+2*iMargin));
 
	//ipainter.setRenderHint(QPainter::SmoothPixmapTransform, true);
	ipainter.setRenderHint(QPainter::Antialiasing);
	CanvasDrawer->RefreshCanvas(this);
 
	CanvasDrawer->RunOpenGL(&ipainter,ShowLens);
	if(ShowLens==TRUE)
	ipainter.drawImage(m_pos - QPointF(m_radius, m_radius), m_lens_image);
}

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the code to draw texts, edges, nodes are inside the function RunOpenGL(&ipainter,ShowLens)

the display is like this:http://www.qtcentre.org/attachment.p...8&d=1313790664

Why the QPainter::Antialiasing fail to act?

Looking for your advice.

Thanks a lot.

You need to enable supersampling for your GL context for antialiasing to work with OpenGL.

Quote:

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Originally Posted by wysota

You need to enable supersampling for your GL context for antialiasing to work with OpenGL.

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I am sorry, actually there is no opengl code in the function "RunOpenGL"

thank you all the same.

It doesn't matter, your widget is a QGLWidget.