ArcScaleNeedle Class

An arc scale needle.

Namespace: DevExpress.Xpf.Gauges

Assembly: DevExpress.Xpf.Gauges.v20.1.dll

Declaration

public class ArcScaleNeedle :
    ArcScaleIndicator
Public Class ArcScaleNeedle
    Inherits ArcScaleIndicator

Related API Members

The following members accept/return ArcScaleNeedle objects:

Remarks

A needle is used to point to the current value of a circular scale. An instance of an arc scale needle is represented by the ArcScaleNeedle object. It can be accessed as an item of the ArcScaleNeedleCollection object returned by the ArcScale.Needles property.

A typical arc scale needle is shown in the image below:

Circular Gauge_Needle

For more information on needles, refer to the Needle document.

Examples

This example illustrates how to create a CircularGaugeControl instance with a single ArcScale object.

<Window x:Class="DXGauges_Circular.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:dxga="http://schemas.devexpress.com/winfx/2008/xaml/gauges"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <dxga:CircularGaugeControl Name="circularGaugeControl1" >
            <dxga:CircularGaugeControl.Model>
                <dxga:CircularRedClockModel />
            </dxga:CircularGaugeControl.Model>
            <dxga:CircularGaugeControl.Scales>
                <dxga:ArcScale StartValue="0" EndValue="12" 
                               StartAngle="-90" EndAngle="270"
                               MajorIntervalCount="12" MinorIntervalCount="5">
                    <dxga:ArcScale.LabelOptions>
                        <dxga:ArcScaleLabelOptions ShowFirst="False" Orientation="LeftToRight" />
                    </dxga:ArcScale.LabelOptions>
                    <dxga:ArcScale.Needles>
                        <dxga:ArcScaleNeedle Value="3" />
                        <dxga:ArcScaleNeedle Value="12" />
                    </dxga:ArcScale.Needles>
                    <dxga:ArcScale.Markers>
                        <dxga:ArcScaleMarker Value="7" />
                    </dxga:ArcScale.Markers>
                    <dxga:ArcScale.RangeBars>
                        <dxga:ArcScaleRangeBar AnchorValue="7" Value="3" />
                    </dxga:ArcScale.RangeBars>
                    <dxga:ArcScale.Layers>
                        <dxga:ArcScaleLayer />
                    </dxga:ArcScale.Layers>
                    <dxga:ArcScale.Ranges>
                        <dxga:ArcScaleRange StartValue="0" EndValue="4" />
                        <dxga:ArcScaleRange StartValue="4" EndValue="8" />
                        <dxga:ArcScaleRange StartValue="8" EndValue="12" />
                    </dxga:ArcScale.Ranges>
                </dxga:ArcScale>
            </dxga:CircularGaugeControl.Scales>
        </dxga:CircularGaugeControl>
    </Grid>
</Window>
See Also