QGraphicsView and QGraphicsScene

[alisami]

Hi,

I have a problem about setting the rectangle size of the QGraphicsScene to QGraphicsView's visible part.

When I set the scene's rectangle using view's width and height, the scroll bars appear.

How can I determine the maximum visible size of the QGraphicsView so that I can set the scene's rectangle to maximum ?

The example code is below to demonstrate the problem:

#include <QApplication>
#include <QtGui>
#include <QDebug>
 
int main ( int argc, char *argv[] )
{
        QApplication app ( argc, argv );
 
        QGraphicsView view;
        view.setGeometry ( 10, 10, 400, 300 );
        view.setScene ( new QGraphicsScene() );
 
        qint32 gvWidth = view.width();
        qint32 gvHeight = view.height();
        view.setSceneRect ( -gvWidth / 2, -gvHeight / 2, gvWidth, gvHeight );
 
        QGraphicsLineItem* line = new QGraphicsLineItem ( - gvWidth / 2, - gvHeight / 2, gvWidth / 2, gvHeight / 2 );
        view.scene()->addItem ( line );
 
        view.show();
        return app.exec();
}

#include <QApplication>
#include <QtGui>
#include <QDebug>

int main ( int argc, char *argv[] )
{
        QApplication app ( argc, argv );

        QGraphicsView view;
        view.setGeometry ( 10, 10, 400, 300 );
        view.setScene ( new QGraphicsScene() );

        qint32 gvWidth = view.width();
        qint32 gvHeight = view.height();
        view.setSceneRect ( -gvWidth / 2, -gvHeight / 2, gvWidth, gvHeight );

        QGraphicsLineItem* line = new QGraphicsLineItem ( - gvWidth / 2, - gvHeight / 2, gvWidth / 2, gvHeight / 2 );
        view.scene()->addItem ( line );

        view.show();
        return app.exec();
}

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Sami