The knob component provides a variable output value based on the position of the knob. This control is actually built on the angular gauge component, except with one pointer. As such, most of the properties are similar to that control and not repeated here. For more detail on those properties, see section 7.18.3.2.
Properties:
Main:
Expression: the expression that determines the location of the pointer.
OutputTarget: the channel or variable name that is updated with the value of the pointer as the knob is dragged. This is typically the same as the expression, but not always.
UpdateInterval: minimum time (secs) between output updates as a pointer is hand-moved. Set to 0 to disable. This property is designed to help prevent sending updates to hardware too rapidly.
The rest of the properties in this section are identical to the Pointer properties described in 7.18.3.2 except with "Pointer" as a prefix.
Frame:
KnobBackMultiBrush, KnobBackMultiPreset, KnobBackBrush, KnobBackBrushPreset: determine the brush (color) used on the surface of the knob. Please see sections 7.4.2 and 7.4.3 for details on Multi- properties and presets.
Common Properties:
This component includes all the common properties of components plus the background properties described in section 7.4.4.
