After the coordinate transformation(setRotation()) is how can I get it?

Daryong

Hello.

I added the QGraphicsScene to QGraphicsLineItem.
and rotate LineItem.

How can I rotated a LineItem coordinates ?

< source >
QGraphicsLineItem* pTestLineItem = _scene.addLine( 300, 300, 500, 300, QPen( Qt::red ) );

pTestLineItem->setTransformOriginPoint( pTestLineItem->boundingRect().center() );
pTestLineItem->setRotation( 30. );

QPointF p1 = pTestLineItem->line().p1();
QPointF p2 = pTestLineItem->line().p2();

p1, p2 is no changed.
p1( 300, 300 ) and p2(500, 300 )

thanks.

Devopia53

pTestLineItem->line().p1() is origin coordinate before rotated it. Also always returned origin.

If you want to know the rotated coordinates, you must use mapping methods.

Something like this:

QPointF p1 = pTestLineItem->mapToScene(pTestLineItem->line().p1());

Daryong

@Devopia53 Ok, Thank you very much. ^^