How to interact with gauge | Infragistics Forums

please run this form for a demonstration.

using Infragistics.UltraGauge.Resources;

using Infragistics.Win.UltraWinGauge;

using System;

using System.Windows.Forms;

using System.Drawing;

public class Form1 : Form

{

private UltraGauge ultraGauge1;

public Form1()

{

this.ultraGauge1 = new UltraGauge();

this.ultraGauge1.Dock = DockStyle.Fill;

this.Controls.Add(this.ultraGauge1);

LinearGauge lin = new LinearGauge();

LinearGaugeScale linearScale = new LinearGaugeScale();

linearScale.StartExtent = 10.0;

linearScale.EndExtent = 90.0;

linearScale.Labels.BrushElement = new SolidFillBrushElement(Color.Black);

linearScale.MajorTickmarks.StrokeElement.Color = Color.Black;

NumericAxis axis = new NumericAxis();

axis.StartValue = 0.0;

axis.EndValue = 10.0;

axis.TickmarkInterval = 1.0;

LinearGaugeNeedle needle = new LinearGaugeNeedle();needle.BrushElement = new SolidFillBrushElement(Color.Black);

needle.Value = 3.14;

this.ultraGauge1.Gauges.Add(lin);

lin.Scales.Add(linearScale);

linearScale.Axis = axis;

linearScale.Markers.Add(needle);

this.ultraGauge1.PrimitiveMouseDown += new GaugePrimitiveMouseEventHandler(this.ultraGauge1_PrimitiveMouseDown);

this.ultraGauge1.MouseMove += new MouseEventHandler(this.ultraGauge1_MouseMove);

this.ultraGauge1.MouseLeave += new EventHandler(this.ultraGauge1_MouseLeave);

this.ultraGauge1.MouseUp += new MouseEventHandler(this.ultraGauge1_MouseUp);

}

private LinearGaugeNeedle DraggingNeedle { get; set; }

private void ultraGauge1_PrimitiveMouseDown(object sender, GaugePrimitiveMouseEventArgs e)

{

LinearGaugeNeedle needle = e.Primitive.Element as LinearGaugeNeedle;if (needle != null)

{

this.DraggingNeedle = needle;

}

private void ultraGauge1_MouseMove(object sender, MouseEventArgs e)

{

if (this.DraggingNeedle != null)

{

Rectangle scaleBounds = this.DraggingNeedle.Scale.GetScaleBounds(this.ultraGauge1.Bounds);

this.DraggingNeedle.Value =

this.DraggingNeedle.Scale.Axis.MapInverse(e.X, scaleBounds.Left, scaleBounds.Right);

}

protected override void OnMouseUp(MouseEventArgs e)

{

base.OnMouseUp(e);

this.DraggingNeedle = null;

}

protected override void OnMouseLeave(EventArgs e)

{

base.OnMouseLeave(e);

this.DraggingNeedle = null;

}

private void ultraGauge1_MouseLeave(object sender, EventArgs e)

{

this.DraggingNeedle = null;

}

private void ultraGauge1_MouseUp(object sender, MouseEventArgs e)

{

this.DraggingNeedle = null;

}