Class BOBGaugeChart

Namespace

BlazOrbit.Charts.Components

Assembly

BlazOrbit.Charts.dll

Gauge chart - single-value KPI display rendered as an arc fill against a track. Supports semi (180°), three-quarter (270°) and full (360°) shapes plus optional zone Segments (e.g. green-amber-red thresholds). The current Value drives the fill arc and the centered numeric readout.

public sealed class BOBGaugeChart : BOBChartBase<int, double>, IDataVisualizationFamilyComponent

Inheritance

object

ComponentBase

BOBComponentBase

BOBChartBase<int, double>

BOBGaugeChart

Implements

IDataVisualizationFamilyComponent

Inherited Members

BOBChartBase<int, double>.ToggleSeriesAsync(string)

BOBChartBase<int, double>.OnResize(double, double)

BOBChartBase<int, double>.DisposeAsync()

BOBChartBase<int, double>.ExportAsPngAsync()

BOBChartBase<int, double>.Width

BOBChartBase<int, double>.Height

BOBChartBase<int, double>.AspectRatio

BOBChartBase<int, double>.ShowExportButton

BOBChartBase<int, double>.ExportFileName

BOBChartBase<int, double>.ShowLegend

BOBChartBase<int, double>.LegendPosition

BOBChartBase<int, double>.OnLegendToggle

BOBChartBase<int, double>.OnChartReady

BOBChartBase<int, double>.Theme

BOBChartBase<int, double>.TooltipTemplate

BOBChartBase<int, double>.TooltipFormat

BOBChartBase<int, double>.Animated

BOBChartBase<int, double>.AnimationDuration

BOBComponentBase.DisposeAsync()

BOBComponentBase.AdditionalAttributes

BOBComponentBase.ComputedAttributes

Constructors

BOBGaugeChart()

public BOBGaugeChart()

Properties

Caption

Optional caption rendered below the value (e.g. metric name).

[Parameter]
public string? Caption { get; set; }

Property Value

string

Max

Upper bound of the gauge domain. Default 100.

[Parameter]
public double Max { get; set; }

Property Value

double

Min

Lower bound of the gauge domain. Default 0.

[Parameter]
public double Min { get; set; }

Property Value

double

Segments

Optional zone segments (color bands across the domain).

[Parameter]
public IEnumerable<BOBChartGaugeSegment>? Segments { get; set; }

Property Value

IEnumerable<BOBChartGaugeSegment>

Shape

Arc layout shape. Default Semi.

[Parameter]
public BOBGaugeShape Shape { get; set; }

Property Value

BOBGaugeShape

Thickness

Track + value-arc thickness (px). Default 16.

[Parameter]
public double Thickness { get; set; }

Property Value

double

TrackColor

Color of the track behind the value arc. Default surface-variant.

[Parameter]
public string TrackColor { get; set; }

Property Value

string

Unit

Optional unit suffix appended after the value (e.g. "%", "ms").

[Parameter]
public string? Unit { get; set; }

Property Value

string

Value

Current value to display.

[Parameter]
public double Value { get; set; }

Property Value

double

ValueColor

Color of the value arc (when no Segments). Default palette[0].

[Parameter]
public string? ValueColor { get; set; }

Property Value

string

ValueFormat

Format string for the centered value readout. Default "0.#".

[Parameter]
public string? ValueFormat { get; set; }

Property Value

string

Methods

BuildAriaLabel()

Default ARIA label for the chart's <svg> root. Subclasses override to inject series / value summaries (improves screen-reader experience).

protected override string BuildAriaLabel()

Returns

string

RenderSvg(RenderTreeBuilder)

Concrete charts override this to emit SVG content. The supplied builder is positioned inside the <svg> root, so implementations only need to add geometry primitives (lines, paths, rects, text). Sequence numbers must remain unique within the override.

protected override void RenderSvg(RenderTreeBuilder builder)

Parameters

builder RenderTreeBuilder

Render tree builder positioned inside the SVG root.