When presenting (in a simulator) a user interface, that normally uses turning knobs, how should the mouse wheel map to the turning of the drawn knob?
I am looking at a simulator which draws a bunch of knobs. The knobs turn clockwise to increase the associated value and counter-clockwise to decrease it. However in some models, one value may be represented by a vertical wheel that looks similar to the mouse scroll wheel and this is always turned down to increase the value. The value may be represented by knob in other models with standard turning clockwise to increase.
The knobs can be turned by moving a mouse pointer over them and either clicking or turning the scroll wheel. Left click always increases the value and middle click always decreases it and this is consistent across the models. However in some models scrolling up turns the knobs clockwise and in others it turns them counter-clockwise and this is confusing.
So I'd like to file bugs and/or suggest patches, but I don't know in which way it should be made consistent.