Pointers in UWP Linear Gauge (SfLinearGauge)

The LinearGauge provides support to mark values using the BarPointer and SymbolPointer.

Bar pointer

BarPointer is used to mark scale values. It starts at the beginning of gauge and ends at the pointer value. You can add bar pointer using the PointerType property.

<gauge:SfLinearGauge >

            <gauge:SfLinearGauge.MainScale>

            <gauge:LinearScale     MajorTickStroke="Gray" LabelSize="15" 
                                   MinorTickStroke="Gray" LabelStroke="#424242"
                                   ScaleBarLength="300">

                <gauge:LinearScale.Pointers>

                    <gauge:LinearPointer PointerType="BarPointer" Value="75" 
                                         BarPointerStroke="#36D1DC" />
                </gauge:LinearScale.Pointers>
                
            </gauge:LinearScale>

            </gauge:SfLinearGauge.MainScale>

        </gauge:SfLinearGauge>
SfLinearGauge sfLinearGauge = new SfLinearGauge();

            LinearScale linearScale = new LinearScale();

            linearScale.MajorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.MinorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.LabelStroke = new SolidColorBrush(Color.FromArgb(0xff, 0x42, 0x42, 0x42));

            linearScale.ScaleBarLength = 300;

            linearScale.LabelSize = 15;

            LinearPointer linearPointer1 = new LinearPointer();

            linearPointer1.PointerType = LinearPointerType.BarPointer;

            linearPointer1.Value = 75;

            linearPointer1.BarPointerStroke = new SolidColorBrush(Color.FromArgb(0xff,0x36,0xD1,0xDC));

            linearScale.Pointers.Add(linearPointer1);

            sfLinearGauge.MainScale = linearScale;

Pointers_img1

Bar pointer customization

The UI of Bar pointer is customized using the BarPointerStroke and BarPointerStrokeThickness properties.

<gauge:SfLinearGauge >

            <gauge:SfLinearGauge.MainScale>

            <gauge:LinearScale     MajorTickStroke="Gray" LabelSize="15" 
                                   MinorTickStroke="Gray" LabelStroke="#424242"
                                   ScaleBarLength="300">

                <gauge:LinearScale.Pointers>

                    <gauge:LinearPointer PointerType="BarPointer" Value="75" 
                                         BarPointerStroke="Orange" BarPointerStrokeThickness="20"/>
                </gauge:LinearScale.Pointers>
                
            </gauge:LinearScale>

            </gauge:SfLinearGauge.MainScale>

        </gauge:SfLinearGauge>
SfLinearGauge sfLinearGauge = new SfLinearGauge();

            LinearScale linearScale = new LinearScale();

            linearScale.MajorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.MinorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.LabelStroke = new SolidColorBrush(Color.FromArgb(0xff, 0x42, 0x42, 0x42));

            linearScale.ScaleBarLength = 300;

            linearScale.LabelSize = 15;

            LinearPointer linearPointer1 = new LinearPointer();

            linearPointer1.PointerType = LinearPointerType.BarPointer;

            linearPointer1.Value = 75;

            linearPointer1.BarPointerStroke = new SolidColorBrush(Colors.Orange);

            linearPointer1.BarPointerStrokeThickness = 20;

            linearScale.Pointers.Add(linearPointer1);

            sfLinearGauge.MainScale = linearScale;

Pointers_img2

Setting corner radius type for bar pointer

Corners of the BarPointer can be customized by setting the value to the
CornerRadius property.

<gauge:SfLinearGauge >

            <gauge:SfLinearGauge.MainScale>

            <gauge:LinearScale     MajorTickStroke="Gray" LabelSize="15"
                                   MinorTickStroke="Gray" LabelStroke="#424242" 
                                   ScaleBarLength="300">

                <gauge:LinearScale.Pointers>

                    <gauge:LinearPointer PointerType="BarPointer" Value="75" BarPointerStroke="#36D1DC"
                                 CornerRadius="10,0,0,10"       BarPointerStrokeThickness="20">
                       
                    </gauge:LinearPointer>

                </gauge:LinearScale.Pointers>
                
            </gauge:LinearScale>

            </gauge:SfLinearGauge.MainScale>

        </gauge:SfLinearGauge>
SfLinearGauge sfLinearGauge = new SfLinearGauge();

            LinearScale linearScale = new LinearScale();

            linearScale.MajorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.MinorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.LabelStroke = new SolidColorBrush(Color.FromArgb(0xff, 0x42, 0x42, 0x42));

            linearScale.ScaleBarLength = 300;

            linearScale.LabelSize = 15;

            LinearPointer linearPointer1 = new LinearPointer();

            linearPointer1.PointerType = LinearPointerType.BarPointer;

            linearPointer1.Value = 75;
     
            linearPointer1.BarPointerStrokeThickness = 20;

            linearPointer1.BarPointerStroke =  new SolidColorBrush(Color.FromArgb(0xff, 0x36, 0xD1, 0xDC));

            linearPointer1.CornerRadius = new Windows.UI.Xaml.CornerRadius(10,0,0,10);

            linearScale.Pointers.Add(linearPointer1);

            sfLinearGauge.MainScale = linearScale;

Pointers_img3

Setting gradient color for bar pointer

You can give smooth color transition to bar pointer to specifying the different colors based on bar pointer’s value by using GradientStops property.

<gauge:SfLinearGauge >

            <gauge:SfLinearGauge.MainScale>

            <gauge:LinearScale     MajorTickStroke="Gray" LabelSize="15" CornerRadius="10"
                                   MinorTickStroke="Gray" LabelStroke="#424242" ScaleBarStroke="#F7EDED"
                                   ScaleBarLength="300">

                <gauge:LinearScale.Pointers>

                    <gauge:LinearPointer   PointerType="BarPointer" Value="75" 
                                           CornerRadius="10"  BarPointerStrokeThickness="20">

                        <gauge:LinearPointer.GradientStops>

                            <gauge:GaugeGradientStop Value="10" Color="#f8babf"/>
                            <gauge:GaugeGradientStop Value="40" Color="#ee89a7"/>
                            <gauge:GaugeGradientStop Value="50" Color="#e4548c"/>
                            <gauge:GaugeGradientStop Value="60" Color="#db2575"/>

                        </gauge:LinearPointer.GradientStops>

                    </gauge:LinearPointer>

                </gauge:LinearScale.Pointers>
                
            </gauge:LinearScale>

            </gauge:SfLinearGauge.MainScale>

        </gauge:SfLinearGauge>
SfLinearGauge sfLinearGauge = new SfLinearGauge();

            LinearScale linearScale = new LinearScale();

            linearScale.MajorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.MinorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.LabelStroke = new SolidColorBrush(Color.FromArgb(0xff, 0x42, 0x42, 0x42));

            linearScale.ScaleBarStroke = new SolidColorBrush(Color.FromArgb(0xff, 0xF7, 0xED, 0xED));

            linearScale.ScaleBarLength = 300;

            linearScale.LabelSize = 15;

            linearScale.CornerRadius = new Windows.UI.Xaml.CornerRadius(10);

            LinearPointer linearPointer1 = new LinearPointer();

            linearPointer1.PointerType = LinearPointerType.BarPointer;

            linearPointer1.Value = 75;

            GaugeGradientStop gaugeGradientStop = new GaugeGradientStop();

            gaugeGradientStop.Value = 10;

            gaugeGradientStop.Color = Color.FromArgb(0xff, 0xF8, 0xBA, 0xBF);

            linearPointer1.GradientStops.Add(gaugeGradientStop);

            GaugeGradientStop gaugeGradientStop1 = new GaugeGradientStop();

            gaugeGradientStop1.Value = 40;

            gaugeGradientStop1.Color = Color.FromArgb(0xff, 0xEE, 0x89, 0xA7);

            linearPointer1.GradientStops.Add(gaugeGradientStop1);

            GaugeGradientStop gaugeGradientStop2 = new GaugeGradientStop();

            gaugeGradientStop2.Value = 50;

            gaugeGradientStop2.Color = Color.FromArgb(0xff, 0xE4, 0x54, 0x8C);

            linearPointer1.GradientStops.Add(gaugeGradientStop2);

            GaugeGradientStop gaugeGradientStop3 = new GaugeGradientStop();

            gaugeGradientStop3.Value = 60;

            gaugeGradientStop3.Color = Color.FromArgb(0xff, 0xDB, 0x25, 0x75);

            linearPointer1.GradientStops.Add(gaugeGradientStop3);
        
            linearPointer1.BarPointerStrokeThickness = 20;

            linearPointer1.CornerRadius = new Windows.UI.Xaml.CornerRadius(10);

            linearScale.Pointers.Add(linearPointer1);

            sfLinearGauge.MainScale = linearScale;

Pointers_img4

Symbol pointer

In SymbolPointer, the value is pointed by a symbol on the scale.

<gauge:SfLinearGauge >

            <gauge:SfLinearGauge.MainScale>

            <gauge:LinearScale     MajorTickStroke="Gray" LabelSize="15"
                                   MinorTickStroke="Gray" LabelStroke="#424242" 
                                   ScaleBarLength="300">

                <gauge:LinearScale.Pointers>

                    <gauge:LinearPointer PointerType="SymbolPointer" Value="60"  />

                </gauge:LinearScale.Pointers>

            </gauge:LinearScale>

            </gauge:SfLinearGauge.MainScale>

        </gauge:SfLinearGauge>
SfLinearGauge sfLinearGauge = new SfLinearGauge();

            LinearScale linearScale = new LinearScale();

            linearScale.MajorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.MinorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.LabelStroke = new SolidColorBrush(Color.FromArgb(0xff, 0x42, 0x42, 0x42));

            linearScale.ScaleBarLength = 300;

            linearScale.LabelSize = 15;

            LinearPointer linearPointer = new LinearPointer();

            linearPointer.PointerType = LinearPointerType.SymbolPointer;

            linearPointer.Value = 60;

            linearScale.Pointers.Add(linearPointer);

            sfLinearGauge.MainScale = linearScale;

Pointers_img5

Symbol pointer customization

You can modify the size of symbol pointer by changing the SymbolPointerHeight and SymbolPointerWidth properties. The stroke of symbol pointer is changed using the SymbolPointerStroke property.

<gauge:SfLinearGauge >

            <gauge:SfLinearGauge.MainScale>

            <gauge:LinearScale     MajorTickStroke="Gray" LabelSize="15"
                                   MinorTickStroke="Gray" LabelStroke="#424242" 
                                   ScaleBarLength="300">

                <gauge:LinearScale.Pointers>

                    <gauge:LinearPointer       PointerType="SymbolPointer" Value="60"
                                               SymbolPointerHeight="15" SymbolPointerWidth="20"
                                               SymbolPointerStroke="DeepSkyBlue"/>

                </gauge:LinearScale.Pointers>

            </gauge:LinearScale>

            </gauge:SfLinearGauge.MainScale>

        </gauge:SfLinearGauge>
SfLinearGauge sfLinearGauge = new SfLinearGauge();

            LinearScale linearScale = new LinearScale();

            linearScale.MajorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.MinorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.LabelStroke = new SolidColorBrush(Color.FromArgb(0xff, 0x42, 0x42, 0x42));

            linearScale.ScaleBarLength = 300;

            linearScale.LabelSize = 15;

            LinearPointer linearPointer = new LinearPointer();

            linearPointer.PointerType = LinearPointerType.SymbolPointer;

            linearPointer.Value = 60;

            linearPointer.SymbolPointerHeight = 15;

            linearPointer.SymbolPointerWidth = 20;

            linearPointer.SymbolPointerStroke = new SolidColorBrush(Colors.DeepSkyBlue);

            linearScale.Pointers.Add(linearPointer);

            sfLinearGauge.MainScale = linearScale;

Pointers_img6

Positioning symbol pointer

The SymbolPointer in the scale can be placed above, below, or in between the scale by choosing the following options available in the SymbolPointerPosition property:

  1. Above
  2. Below (Default)
  3. Cross
  4. Away
<gauge:SfLinearGauge >

            <gauge:SfLinearGauge.MainScale>

            <gauge:LinearScale     MajorTickStroke="Gray" LabelSize="15"
                                   MinorTickStroke="Gray" LabelStroke="#424242" 
                                   ScaleBarLength="300" >

                <gauge:LinearScale.Pointers>

                    <gauge:LinearPointer      PointerType="SymbolPointer" Value="60"
                                              SymbolPointerPosition="Cross"
                                              SymbolPointerHeight="30" SymbolPointerWidth="30"
                                              SymbolPointerStroke="#5B86E5"/>

                </gauge:LinearScale.Pointers>

            </gauge:LinearScale>

            </gauge:SfLinearGauge.MainScale>

        </gauge:SfLinearGauge>
SfLinearGauge sfLinearGauge = new SfLinearGauge();

            LinearScale linearScale = new LinearScale();

            linearScale.MajorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.MinorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.LabelStroke = new SolidColorBrush(Color.FromArgb(0xff, 0x42, 0x42, 0x42));

            linearScale.ScaleBarLength = 300;

            linearScale.LabelSize = 15;

            LinearPointer linearPointer = new LinearPointer();

            linearPointer.PointerType = LinearPointerType.SymbolPointer;

            linearPointer.Value = 60;

            linearPointer.SymbolPointerPosition = LinearSymbolPointersPosition.Cross;

            linearPointer.SymbolPointerHeight = 30;

            linearPointer.SymbolPointerWidth = 30;

            linearPointer.SymbolPointerStroke = new SolidColorBrush(Color.FromArgb(0xff, 0x5B, 0x86, 0xE5));

            linearScale.Pointers.Add(linearPointer);

            sfLinearGauge.MainScale = linearScale;

Pointers_img7

Change symbol pointer shapes

The SymbolPointerStyle property is used to select symbol pointer style.

<gauge:SfLinearGauge >

            <gauge:SfLinearGauge.MainScale>

            <gauge:LinearScale     MajorTickStroke="Gray" LabelSize="15"
                                   MinorTickStroke="Gray" LabelStroke="#424242" 
                                   ScaleBarLength="300"  >

                <gauge:LinearScale.Pointers>
                    <gauge:LinearPointer PointerType="SymbolPointer" Value="60"
                                           SymbolPointerStyle="Custom">

                        <gauge:LinearPointer.SymbolPointerTemplate>

                            <DataTemplate>
                                <Rectangle Width="10" Height="10" Stroke="Red" StrokeThickness="10">
                                </Rectangle>
                            </DataTemplate>

                        </gauge:LinearPointer.SymbolPointerTemplate>

                    </gauge:LinearPointer>

                </gauge:LinearScale.Pointers>

            </gauge:LinearScale>

            </gauge:SfLinearGauge.MainScale>

        </gauge:SfLinearGauge>
SfLinearGauge sfLinearGauge = new SfLinearGauge();

            LinearScale linearScale = new LinearScale();

            linearScale.MajorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.MinorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.LabelStroke = new SolidColorBrush(Color.FromArgb(0xff, 0x42, 0x42, 0x42));

            linearScale.ScaleBarLength = 300;

            linearScale.LabelSize = 15;

            LinearPointer linearPointer = new LinearPointer();

            linearPointer.PointerType = LinearPointerType.SymbolPointer;

            linearPointer.Value = 60;

            var content = "<DataTemplate xmlns=\"http://schemas.microsoft.com/winfx/2006/xaml/presentation\">";

            content += "<Grid>";

            content += "<Rectangle Height=\"10\" Width=\"10\" Stroke=\"Red\" StrokeThickness=\"10\">";
                     
            content +=  "</Rectangle>" + "</Grid>";

            content += "</DataTemplate>";

            linearPointer.SymbolPointerStyle = LinearSymbolPointerStyle.Custom;

            linearPointer.SymbolPointerTemplate = (DataTemplate)XamlReader.Load(content);

            linearScale.Pointers.Add(linearPointer);

            sfLinearGauge.MainScale = linearScale;

Pointers_img8

Adding multiple pointers

In addition to the default pointer, you can add “n” number of pointers to a linear scale using the Pointers property.

<gauge:SfLinearGauge >

            <gauge:SfLinearGauge.MainScale>

            <gauge:LinearScale     MajorTickStroke="Gray" LabelSize="15"
                                   MinorTickStroke="Gray" LabelStroke="#424242" 
                                   ScaleBarLength="300"  >

                <gauge:LinearScale.Pointers>

                    <gauge:LinearPointer PointerType="SymbolPointer" Value="60"
                                             SymbolPointerHeight="15" SymbolPointerWidth="15"
                                              SymbolPointerPosition="Above" SymbolPointerStroke="#5B86E5"/>

                    <gauge:LinearPointer PointerType="BarPointer" Value="75" BarPointerStroke="#36D1DC"
                                             BarPointerStrokeThickness="10"/>

                </gauge:LinearScale.Pointers>

            </gauge:LinearScale>

            </gauge:SfLinearGauge.MainScale>

        </gauge:SfLinearGauge>
SfLinearGauge sfLinearGauge = new SfLinearGauge();

            LinearScale linearScale = new LinearScale();

            linearScale.MajorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.MinorTickStroke = new SolidColorBrush(Colors.Gray);

            linearScale.LabelStroke = new SolidColorBrush(Color.FromArgb(0xff, 0x42, 0x42, 0x42));

            linearScale.ScaleBarLength = 300;

            linearScale.LabelSize = 15;

            LinearPointer linearPointer1 = new LinearPointer();

            linearPointer1.PointerType = LinearPointerType.BarPointer;

            linearPointer1.Value = 75;

            linearPointer1.BarPointerStroke = new SolidColorBrush(Color.FromArgb(0xff, 0x36, 0xD1, 0xDC));

            linearPointer1.BarPointerStrokeThickness = 10;

            linearScale.Pointers.Add(linearPointer1);

            LinearPointer linearPointer = new LinearPointer();

            linearPointer.PointerType = LinearPointerType.SymbolPointer;

            linearPointer.Value = 60;

            linearPointer.SymbolPointerHeight = 15;

            linearPointer.SymbolPointerWidth = 15;

            linearPointer.SymbolPointerPosition = LinearSymbolPointersPosition.Above;

            linearPointer.SymbolPointerStroke = new SolidColorBrush(Color.FromArgb(0xff, 0x5B, 0x86, 0xE5));

            linearScale.Pointers.Add(linearPointer);

            sfLinearGauge.MainScale = linearScale;

Pointers_img9