Needle
A Needle element indicates a specific value in a circular scale. The needle starts at the center of the scale and ends at the scale’s current value.
You can place multiple needles on a scale. Needle objects are instances of the ArcScaleNeedle class.
The following image shows a circular gauge with two needles:
At design time, you can customize a gauge’s needles using the Preset Manager.
The table below lists the main properties that affect element behavior and appearance.
| Characteristics | Members |
|---|---|
| Data | ValueIndicatorComponent<TProvider>.Value |
| Layout | ArcScaleNeedle.StartOffset,ArcScaleNeedle.EndOffset,BaseLeafPrimitive.ZOrder |
| Appearance | ArcScaleNeedle.ShapeType |