Control of knob / dial using only single axis mouse movement

[Dataflow_G]

Knobs and dials require the user to move the mouse in a circular arc when adjusting the value, which isn't very ergonomic or precise. If the user isn't careful, passing the mouse over the center of the knob while adjusting it can cause the value to change rapidly and unexpectedly.

The idea is to add an option for the knob or dial control to be adjusted by only moving the mouse along a single axis (vertically or horizontally).

[Dataflow_G]

A slide control or XControl could be used in most cases, but there are some situations where neither option is suitable.