I have QGraphicsScene instance set to QGraphicsView on the GUI with scrollbars enabled and full view port update. But when I scroll my graphics view I get the items added to qgraphics scene disappeared on some point, though they are added in code correctly and are expected to be displayed upon scroll ( custom class inherited from QGraphicsItem ):
class CSquare : public QObject, public QGraphicsItem
paint method is implemented as follows:
void CSquare::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
{
static int sz;
painter->setFont(fnt_);
painter->fillRect(this->r,this->br);
painter->drawRect(this->r);
//painter->drawText(this->p,this->txt);
if (txt == "")
return;
if (fnt_.pixelSize()>0)
sz = fnt_.pixelSize();
else
if (fnt_.pointSize()>0)
sz = fnt_.pointSize();
else
if (fnt_.pointSizeF()>0)
sz = fnt_.pointSizeF();
switch (this->al_flag)
{
case 1:
painter->drawText(this->p.x(),this->p.y(),sz*txt.size(),2*sz,Qt::AlignRight,this->txt);
break;
case 2:
//painter->drawText(this->r,Qt::AlignLeft,this->txt);
painter->drawText(this->p.x(),this->p.y(),sz*txt.size(),2*sz,Qt::AlignLeft,this->txt);
break;
case 3:
//painter->drawText(this->r,Qt::AlignCenter,this->txt);
painter->drawText(this->p.x(),this->p.y(),sz*txt.size(),2*sz,Qt::AlignCenter,this->txt);
break;
case 4:
//painter->drawText(this->r,Qt::AlignJustify,this->txt);
painter->drawText(this->p.x(),this->p.y(),sz*txt.size(),2*sz,Qt::AlignJustify,this->txt);
break;
}
}
One can see how they disappear on application run on this video screen cast:
https://www.box.com/s/h4h94×1avgay1crzvyzx
Can somebody hint what is the problem, how to resolve so the graphics items will not disappear on the view?
Thanks in advance.
