How to fixed the size of the QGraphicsScene.?

[syclopse]

Hi,

I am having QGraphicsScene in the QGraphicsView,

now what happens is when I set any QPixmap to QGraphicsScene then it will change QGraphicsScene to QPixmap size,

that is not my requirement,
I want to fixed the size of the QGraphicsScene and then image should be adjusted according to QGraphicsScene's size no matter how big an image was.

Please kindly provide me the solution,

[high_flyer]

see QGraphicsScene::setSceneRect()

[syclopse]

I have tried it but that will bound the QGraphicsScene's size to minimum means QGraphicsScene will not shrink less then provided,
but QGraphicsScene can take any size maximum than that,
that is not needed in my case,

hope u understand ....

[high_flyer]

hope u understand ....

am... actually I don't... sorry...

[meazza]

You could reimplement

QGraphicsScene::drawBackground(QPainter *painter, const QRectF &rect)

QGraphicsScene::drawBackground(QPainter *painter, const QRectF &rect)

To copy to clipboard, switch view to plain text mode 

and use the QPainter to draw the QPixmap. Because it looks me to you want the pixmap as background or?

You could even do something like

painter->drawPixmap(0,0, m_backgroundImage.scaled(rect.width(), rect.height(),Qt::IgnoreAspectRatio, Qt::SmoothTransformation));

painter->drawPixmap(0,0, m_backgroundImage.scaled(rect.width(), rect.height(),Qt::IgnoreAspectRatio, Qt::SmoothTransformation));

To copy to clipboard, switch view to plain text mode 

[syclopse]

when I am using

painter->drawPixmap(0,0, m_backgroundImage.scaled(rect.width(), rect.height(),Qt::IgnoreAspectRatio, Qt::SmoothTransformation));

I am getting the error that painter is not active.
please guide me

[meazza]

Try calling QPainter::begin() and QPainter::end(). http://doc.qt.nokia.com/latest/qpainter.html#begin

[syclopse]

I am using QPainter::begin() and QPainter::end().
dude .... !!!!

[SixDegrees]

Then your code is wrong.

[syclopse]

Actually I am using QPainter outside of paintevent().