RubberBand Problem

[zgulser]

Hi

I implement QRubberband respectively in the mousePress, mouseMove and mouseRelease methods of QGraphicsScene. But when I do the following I get a runtime error.

void myScene::mouseMoveEvent(QGraphicsMouseMoveEvent* event)
{
myRubberband.setGeometry(QRect(p2, event->screePos()));
QGraphicsScene::mouseMoveEvent(event);

}

The runtime error is : "Do not delete object 'unnamed' during its event handler"

What's wrong with it?

[zgulser]

I solved the problem, but new one arises

void AhwcsEcdisScene::mousePressEvent(QGraphicsSceneMou seEvent * mouseEvent)
{
p2 = mouseEvent->screenPos();


if(!mRubberband)
{
mRubberband = new QRubberBand(QRubberBand::Rectangle);
pressedFlag = TRUE;
}


mRubberband->setGeometry(QRect(p2,QSize()));
mRubberband->show();
isReleased = FALSE;
cout<<"Mouse PRESSED!!"<<endl;
QGraphicsScene::mousePressEvent(mouseEvent);
}

void AhwcsEcdisScene::mouseMoveEvent(QGraphicsSceneMous eEvent * mouseEvent)
{
if(pressedFlag && !isReleased)
mRubberband->setGeometry(QRect(p2,mouseEvent->screenPos()));

cout<<"Mouse MOVED!!"<<endl;
QGraphicsScene::mouseMoveEvent(mouseEvent);
}

void AhwcsEcdisScene::mouseReleaseEvent(QGraphicsSceneM ouseEvent * mouseEvent)
{
if(!mRubberband)
{
cout<<"Mouse RELEASED!!"<<endl;
mRubberband->hide;
isReleased = TRUE;
}
pressedFlag = FALSE;
QGraphicsScene::mouseReleaseEvent(mouseEvent);
}

Mouse is not released! Any ideas?

[zgulser]

I done with the problem.

By the way is there any way to find items(if any) inside the rectangle returned by QRubberBand.rect()?

[aamer4yu]

Have a look at QGraphicsScene::selectedItems

[zgulser]

Does this method percepts rubberband or something different?

[zgulser]

Hi,

Can we use QRubberband to select QGraphicsItem from the screen? If yes, then how?


Regards.

[talk2amulya]

u can find the rect of ur graphic items and check if the qrubberband's rect contains the rect of graphic items..that should work

[zgulser]

Hi

ı already tried it, but there is type mismatching between QRect and QRectF.

[talk2amulya]

well, u can convert a QRect to QRectF or vice versa:

QRect QRectF::toRect () const
Returns a QRect based on the values of this rectangle. Note that the coordinates in the returned rectangle are rounded to the nearest integer.

QRectF QVariant::toRectF () const
Returns the variant as a QRectF if the variant has type() Rect or RectF; otherwise returns an invalid QRectF.

[zgulser]

Ok, I'am trying now. I will report back to you as soos as possible.

Thanks.

[zgulser]

Sorry for the late answer.

If I do QRubberband::setGeometry(QRect ...), then I couldn't handle the correct rubberband rectangle in order to include QGraphicsItem.

I used rubberband->rect().