Qpainter function on a QFrame problem

[impeteperry]

i am doing a total re-write of a Qt3 program in Qt4
I am using Kubuntu 7.10 distro.
I have a QFrame area "frameA" that I want to use for my drawing (QpaintEvent ).
My Code:

void BaseForm::paintEvent ( QPaintEvent  * event )
{
	QString k, h;
	double angle;
	int n, xs, xe, ys, ye, xc, yc;
	bool ok;
	QPainter p ( this );
 
	QPen pen;
	QFont f;
 
	if ( paintSupportLines.count () > 0 )
	{
		f.setFamily ( "Courier" );
		f.setPointSize ( dwgScaleFactor );
		p.setFont ( f );
		pen.setBrush ( Qt::blue );
		p.setPen ( pen );				
		p.setViewport ( viewportRect );
		p.setWindow ( windowRect );
 
		if ( clearWindow == "erase" ) { p.eraseRect ( windowRect ); clearWindow = "cancel erase"; }
		else
		{
			for ( n = 0; n < paintSupportLines.count(); ++n )
			{
				p.setClipRect ( clippingRect );
				k = paintSupportLines[n];
				tempList = k.split ( "," );
				xs = tempList[0].toInt ( &ok );
				ys = tempList[1].toInt ( &ok );
				xe = tempList[2].toInt ( &ok );
				ye = tempList[3].toInt ( &ok );
				p.drawLine ( xs, ys, xe, ye );

void BaseForm::paintEvent ( QPaintEvent  * event )
{
	QString k, h;
	double angle;
	int n, xs, xe, ys, ye, xc, yc;
	bool ok;
	QPainter p ( this );

	QPen pen;
	QFont f;

	if ( paintSupportLines.count () > 0 )
	{
		f.setFamily ( "Courier" );
		f.setPointSize ( dwgScaleFactor );
		p.setFont ( f );
		pen.setBrush ( Qt::blue );
		p.setPen ( pen );				
		p.setViewport ( viewportRect );
		p.setWindow ( windowRect );

		if ( clearWindow == "erase" ) { p.eraseRect ( windowRect ); clearWindow = "cancel erase"; }
		else
		{
			for ( n = 0; n < paintSupportLines.count(); ++n )
			{
				p.setClipRect ( clippingRect );
				k = paintSupportLines[n];
				tempList = k.split ( "," );
				xs = tempList[0].toInt ( &ok );
				ys = tempList[1].toInt ( &ok );
				xe = tempList[2].toInt ( &ok );
				ye = tempList[3].toInt ( &ok );
				p.drawLine ( xs, ys, xe, ye );

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etc. I can single step thru the program, all values seem correct.,
Since I want to have my graphics in the "frameA" area of the screen I thought maybe I should change line #7 to "QPainter p( frameA )". but this did not help.

The code samples in "The Book of Qt 4" uses separate classes for their "QPaintEvent"s
Do I have to do that?

I would appreciate some help as I am at a total loss.

thanks