Fixed Position of QGraphicsItem

[moh.gup@gmail.com]

Hi,

How can i set fixed position of a graphicsitem which should not be change on changing scene rect or on any applying any transformation(rotate,shear etc) on view.
I already applied flag ItemsIgonreTransformation. and change postion when scenerect change signal emmited.But i am not able to get any signal of transformation.
I want some items(seem to) same position .example Zoomingbar in any map shouldn't change postion ,when map get rotated or transformed.

Please Suggest.

Thanks

[wysota]

An option is to not make those static pieces items. Another option is to use QGraphicsItem::itemChange() to be notified of item position changing and move the item back where it should be.

[moh.gup@gmail.com]

Hi,
Thanks for Reply,I tried QGraphicsItem::itemChange() but on applying transformation on view,QGraphicsitem didnt get any notification.
Please let me know If there is any flag which make me avilable tranformation change in view.

Thanks

[wysota]

Did you read the docs carefully?

[moh.gup@gmail.com]

sir,
I tried to read docs carefully and also implement it.
Please let me know,If I miss something.

Thanks

[wysota]

So which GraphicsItemChange would you expect to receive in your situation?

[moh.gup@gmail.com]

sir,
I am rotating view using QGraphicsView::rotate().I want a single QGraphicsItem seems to be static,I already setFlag(QGraphicsItem::ItemIgnoresTransformations) .
Please suggest.

[wysota]

Answer my question please. Which GraphicsItemChange would you expect to receive. Because without knowing that how can you enable the right one? If there is any "right one". Honestly I would rather use my other solution -- make your "other stuff" something else than items.

[moh.gup@gmail.com]

Sir,
I except to receive QGraphicsItem::ItemTransformHasChanged but on changing Tranformation of view I am not getting it.Is it possible?

[wysota]

I except to receive QGraphicsItem::ItemTransformHasChanged but on changing Tranformation of view I am not getting it.Is it possible?
To quote the docs:


The item's transformation matrix has changed either because setTransform is called, or one of the transformation properties is changed.
Item's, not view's. This is not what you're looking for. Either find something else or use a different approach.

[moh.gup@gmail.com]

Thanks I thinks i need to use different apporach