QGraphicsView + rotate around axis ?

[medved6]

Hi All

I'm trying to rotate my scene with several Items. I'm looking at the scene and I want rotate the scene around some point( point equal to centerTo idealy ).

void MyGraphicsView::updateTransform()
{
	QTransform tr;
	tr.rotate(m_yRotate/1.0, Qt::YAxis);
	tr.rotate(m_xRotate/1.0, Qt::XAxis);
	tr.translate(some_point.x(), some_point.y());
	setTransform(tr);
	/**/
}

void MyGraphicsView::updateTransform()
{
	QTransform tr;
	tr.rotate(m_yRotate/1.0, Qt::YAxis);
	tr.rotate(m_xRotate/1.0, Qt::XAxis);
	tr.translate(some_point.x(), some_point.y());
	setTransform(tr);
	/**/
}

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In other words how can I change the position of YAxis or/and XAxis during such transform?
So far rotation is done around some Axis I can not controll.

I've tryed to play with:

translate
setTransformationAnchor(QGraphicsView::NoAnchor);
setResizeAnchor(QGraphicsView::NoAnchor);
setAlignment();


Any ideas ?

Thank you!

[tbscope]

You translate the coordinate system before you rotate around the new coordinate system

[medved6]

I belive I do that.
In the code above I do tr.translate(some_point.x(), some_point.y());

Some point - is point I want rotation around. But it seems like it does not work.

[tbscope]

No, you rotate first and then do a translation.
Try putting the translate before the two rotates and see what happens.

Or to be more clear: the transformations are performed in the order you write them.

[medved6]

Thank you! I've tryed that.
Does not make any difference
The scene is still rotates around some "other" axis.
What elese could I do ?