Value Indicators

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This topic defines value indicators and explains how they should be used in analog gauges (circular and linear).

A Value Indicator is a pointer that allows you to track the changes of a data value or a data range in analog gauges.

NOTE

The value indicators can be accessed at design time using the gauge Designer.

Depending on the gauge scale, the following indicators are available.

Arc Scale's Indicators

A list of circular gauge indicators is shown below. It includes:

Element Description Class
Needle A needle indicates a value on a scale. It is oriented radially, starting at the scale's center and pointing to the scale's current value. ArcScaleNeedleComponent
Range Bar A range bar within circular gauges is a filled sector that always starts at some fixed value along a scale and extends to another value (the scale's current value or another fixed value). ArcScaleRangeBarComponent
Marker A marker is a small thumb indicating the current value along a scale. ArcScaleMarkerComponent

The following image demonstrates value indicators in the arc scale and their properties that correspond to an indicator's current values.

ArcValueIndicators

For more information on these visual elements, see the Circular Gauge Elements topic.

Linear Scale's Indicators

A Linear scale provides the following indicator types.

Element Description Class
Level Bar A level bar is a visual element that associates its values with a particular scale. The level bar automatically fills a bar along that scale, starting at the scale's minimum value and extending to the scale's current value. LinearScaleLevelComponent
Range Bar A range bar is a filled rectangle that represents a data range along a scale. The range bar starts at a certain fixed value along a scale and extends to the scale's current value. LinearScaleRangeBarComponent
Marker A marker is a small thumb indicating the current value along a scale. LinearScaleMarkerComponent

The image below shows value indicators with specified properties that correspond to their current values in the linear scale.

LinearValueIndicators

To learn more, see Linear Gauge Elements.

See Also