when set the type of an item(let say QCPItemLine) to ptAxisRectRatio, how should set x and y to give appropriate result.
I've read something about ptAxisRectRatio in documents but I did n't understand correctly, for example it says :
Static positioning given by a fraction of the axis rect size (see setAxisRect). "
I don't understand how to setAxisRect and how to set x & y correctly there is no example about it.
please, please , please help me .....