vcl-403784-expressgaugecontrol-concepts-scale-types-arc-three-fourth-circular-scales.md
In the Gauge Control, the Three-Fourth Circular scales are implemented as the TdxGaugeCircularThreeFourthScale and TdxGaugeDBCircularThreeFourthScale objects, corresponding to unbound and data-aware scale versions, respectively.
Since Three-Fourth Circular scales occupy up to three-fourths of the full-circular scale layout, 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 = 225
AngleEnd = -45
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2.
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AngleStart = 210
AngleEnd = -30
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AfricaSunset, Classic, CleanWhite, DarkNight, DeepFire, IceColdZone, Mechanical, Retro, SportCar, White
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3.
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AngleStart = 220
AngleEnd = -40
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Disco, Future, Smart, YellowSubmarine
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4.
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AngleStart = 215
AngleEnd = -35
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In three-fourth circular scales, the range of displayed values can occupy any portion of the arc lying between the minimum and maximum angle values that depend on the current visual style:
As in the case of full-circular scales, you can swap the starting and ending angle values, inverting the scale’s range of displayed values:
Like the minimum and maximum angles of the range of displayed values, a particular shape of a three-fourth circular scale’s background layer depends on the currently selected style.