vcl-175014-expressgaugecontrol-concepts-scale-types-arc-wide-circular-scales.md
The Gauge Control allows you to create wide circular scales in addition to the arc and rectangular scales. Like the arc scales, the wide circular scales use a needle to display a value on an arc-shaped graduated scale and are designed to imitate such analog measuring instruments as voltmeters, galvanometers, and multimeters:
There are two types of wide circular scales available in the Gauge Control:
Unbound wide circular scales implemented by the TdxGaugeCircularWideScale class;
Data-aware wide circular scales implemented by the TdxGaugeDBCircularWideScale class.
The possible arc angles depend on the currently selected style of the scale:
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Maximum and Minimum Scale Angle Values Specified via the OptionsView Parameters
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Scale Visual Styles
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Scale Example
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1.
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AngleStart = 130
AngleEnd = 50
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AfricaSunset, CleanWhite, White
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2.
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AngleStart = 112
AngleEnd = 68
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3.
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AngleStart = 110
AngleEnd = 70
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4.
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AngleStart = 120
AngleEnd = 60
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5.
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AngleStart = 105
AngleEnd = 75
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6.
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AngleStart = 104
AngleEnd = 76
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7.
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AngleStart = 107
AngleEnd = 73
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See Also