GraphicsView paintEvent question

[anafor2004]

Dear All , I have created a CustomLabel class which is based QLabel, then I added this label to QGraphicsView via QGraphicsProxyWidget.

CustomLabel *imageItem = new CustomLabel();
	 imageItem->setSelectionStatus(true);
	 imageItem->setImagePath("/home/can/workspace/DenemeGraphic/media/home.png");
 
QGraphicsProxyWidget *pCImageProxyWidgetInstance = new    QGraphicsProxyWidget(0, Qt::Window);
	 pCImageProxyWidgetInstance->setWidget(imageItem);
	 pCImageProxyWidgetInstance->setCacheMode ( QGraphicsItem::NoCache );
	 pCImageProxyWidgetInstance->setPos(100,100);
	 scene->addItem(pCImageProxyWidgetInstance);

CustomLabel *imageItem = new CustomLabel();
	 imageItem->setSelectionStatus(true);
	 imageItem->setImagePath("/home/can/workspace/DenemeGraphic/media/home.png");
	 
QGraphicsProxyWidget *pCImageProxyWidgetInstance = new    QGraphicsProxyWidget(0, Qt::Window);
	 pCImageProxyWidgetInstance->setWidget(imageItem);
	 pCImageProxyWidgetInstance->setCacheMode ( QGraphicsItem::NoCache );
	 pCImageProxyWidgetInstance->setPos(100,100);
	 scene->addItem(pCImageProxyWidgetInstance);

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In CustomLabel I writed a paintEvent(QPaintEvent *pe) function, the problem is , always it is refreshing , There is a printf() in painEvent and it is continiously printing string.

[yogeshgokul]

Setting

pCImageProxyWidgetInstance->setCacheMode ( QGraphicsItem::NoCache );

Could cause a continues refreshing. Try other cache modes.
And please show us the paintEvent.

[anafor2004]

QPixmap CustomLabel::PreparePixmap()
{
	QPixmap pixmap;
	pixmap.load(m_ImagePath);
	pixmap = pixmap.scaled(WIDTH,HEIGHT,Qt::IgnoreAspectRatio,Qt::FastTransformation);
	printf("a\n");
	return pixmap;
}
void CustomLabel::paintEvent(QPaintEvent *pe)
{
	 QPainter painter(this);
 
	 QPixmap pixmap = PreparePixmap();
	 setPixmap(pixmap);
 
	 if(m_Selected)
	 {
 
		 QPen pen(Qt::red);
		pen.setWidth(5);
		 painter.setPen(pen);
		painter.drawPixmap(3,3,pixmap);
		 painter.drawRect(0,0,width()-1,height()-1);
	 }
}

QPixmap CustomLabel::PreparePixmap()
{
	QPixmap pixmap;
	pixmap.load(m_ImagePath);
	pixmap = pixmap.scaled(WIDTH,HEIGHT,Qt::IgnoreAspectRatio,Qt::FastTransformation);
	printf("a\n");
	return pixmap;
}
void CustomLabel::paintEvent(QPaintEvent *pe)
{
	 QPainter painter(this);

	 QPixmap pixmap = PreparePixmap();
	 setPixmap(pixmap);

	 if(m_Selected)
	 {

		 QPen pen(Qt::red);
		pen.setWidth(5);
		 painter.setPen(pen);
		painter.drawPixmap(3,3,pixmap);
		 painter.drawRect(0,0,width()-1,height()-1);
	 }
}

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it is continously printing "a".

[yogeshgokul]

What printf doing here ?
Can you please comment the printf statement for a while. use qDebug instead.

[anafor2004]

I changed it , but it is same, still printing

[yogeshgokul]

it is continously printing "a".

Where is it printing ?
On my machine its running well, a red colored boundary with a pixmap is displaying with no refreshing problem.