[SOLVED] Resizing QGraphicRectItems with the QGraphicsView

Vaido

Hi!

I have a big amount of QGraphicRectItems inside a QGraphicView. Now I want to change the size of this view. For example: If I let the view grow all the rectangles should grow accordingly in size and position.

I tried

@scene->setSceneRect(0,0,view->width(), view->height())@

but this didnt work, the size of the items stays the same.

amban

If i understand you, you want to zoom in / zoom out your view.
Check following functions in "this":http://doc.qt.digia.com/qt/graphicsview-elasticnodes.html example

@

void GraphWidget::wheelEvent(QWheelEvent *event)
{
scaleView(pow((double)2, -event->delta() / 240.0));
}

void GraphWidget::scaleView(qreal scaleFactor)
{
qreal factor = transform().scale(scaleFactor, scaleFactor).mapRect(QRectF(0, 0, 1, 1)).width();
if (factor < 0.07 || factor > 100)
return;

 scale(scaleFactor, scaleFactor);

}
@

Vaido

Thank you!

Yes i want to zoom in/out.

I dound a solution by myself. Its the fitInView() function of the QGraphicsView.