Drawing a fixed-sized shape at mouse press position on QGraphicsView

[lain]

Hi, thank you very much for reply.

You are taking your item coordinates, map them to scene coords, and than map that to view coords, and you give these coords to the item to draw!
The position you get from the event is in item coordinates, and you are in an item, so just use the position you get from the event.

But if I just use the position given from the event, the item is not drawn at the mouse press position because I set QGraphicsItem::ItemIgnoresTransformations flag of the item to prevent it from resizing with window...
Is there any better way to keep the item size to fixed number of pixels?

[high_flyer]

the item is not drawn at the mouse press position because I set QGraphicsItem::ItemIgnoresTransformations flag

I don't see why this should matter?
The flag means that the item doesn't scale.
But its position stays the same in the parent coordinates, and the item coordinates remain the item coordinates.

[lain]

Thank you again for your reply.

I don't see why this should matter?
The flag means that the item doesn't scale.
But its position stays the same in the parent coordinates, and the item coordinates remain the item coordinates.

The item is drawn at the mouse press position if I don't set the QGraphicsItem::ItemIgnoresTransformations, but NOT if the flag is set...
I would appreciate it if you could confirm this using my code above with any image named test.tif.

[lain]

I've found a kind of solution.
If I make the item a direct child of the scene, it is drawn at the mouse press position.
Do I need to define the transformation matrix by myself to make the item a child of another item?
Seems tricky...