Qt-interest Archive, May 2007
Question about elastic nodes example.
Message 1 in thread
Hello.
Who can explain some feature in qt4.2 example (Elastic_Nodes).
In Class Node there is function Paint.
One of parameters of this function is "option"
of type QStyleOptionGraphicsItem*.
When i try to print the type of parameter *option, it is SO_Default (0).
Why?
It seems to me, that it must have type 17 (SO_Graphics_Item)?
void Node::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
QWidget *)
{
printf ("\n type= %d\n", option->type); // <------ prints zero.
painter->setPen(Qt::NoPen);
painter->setBrush(Qt::darkGray);
painter->drawEllipse(-7, -7, 20, 20);
QRadialGradient gradient(-3, -3, 10);
if (option->state & QStyle::State_Sunken) {
gradient.setCenter(3, 3);
gradient.setFocalPoint(3, 3);
gradient.setColorAt(1, QColor(Qt::yellow).light(120));
gradient.setColorAt(0, QColor(Qt::darkYellow).light(120));
} else {
gradient.setColorAt(0, Qt::yellow);
gradient.setColorAt(1, Qt::darkYellow);
}
painter->setBrush(gradient);
painter->setPen(QPen(Qt::black, 0));
painter->drawEllipse(-10, -10, 20, 20);
}
in console i see:
type= 0
type= 0
type= 0
type= 0
type= 0
can anybody help?
Thanks.
P.S. S
--
[ signature omitted ]
