Polar Bar Chart
Display bar data in a polar coordinate system, where each bar extends radially. Great for cyclical data like days of the week or hours of the day.
Installation
dotnet add package Lumeo.Charts
One-time app setup (AddLumeo(), CSS & JS) is covered in the
installation guide.
Usage
@using Lumeo <PolarBarChart />
Shape-aware skeleton with reserved space for legend and axes — no layout shift when real data arrives.
API Reference
PolarBarChart
| Property | Type | Default | Description |
|---|---|---|---|
| Categories | List<string> | [] | Angular axis category labels. |
| Values | List<double> | [] | Values for each category. |
| ShowLegend | bool | false | Shows or hides the chart legend. |
| IsLoading | bool | false | When true, renders a shape-matched loading skeleton in place of the chart. Bind to your async fetch state. |
| ShowLoadingSkeleton | bool | true | Set to false to opt out of the skeleton (chart area stays empty while IsLoading is true). |
| SkeletonKind | ChartSkeletonKind | (chart default) | Override the skeleton silhouette (Bars, Line, Area, Pie, Scatter, Grid, Generic). |
| SkeletonStyle | ChartSkeletonStyle | Phantom | Phantom renders the real chart with placeholder data and morphs to real data via ECharts animation. Silhouette falls back to the legacy SVG skeleton overlay. |
| ShowLoadingLabel | bool | true | Shows a small "Loading…" pill in the top-right corner whenever IsLoading is true. Layered on top of any SkeletonStyle. Set to false for bare visuals. (rc.18) |
| LoadingText | string? | "Loading…" | Label rendered next to the spinner inside the loading pill. Set to empty to show the spinner alone. (rc.18) |
| ShowTooltip | bool | true | Shows the hover tooltip with category values. |
| Colors | List<string>? | null | Custom per-bar colors overriding the theme palette. |
| Width | string | "100%" | CSS width of the polar bar chart container. |
| Height | string | "350px" | CSS height of the polar bar chart container. |
| Theme | string? | null | ECharts theme name applied to this chart instance. |
| PhantomCycleMs | int | 1400 | Phantom-mode refresh interval in milliseconds while loading. |
| ShowDataLabels | bool | false | Displays value labels on each radial bar. |
| LabelPosition | string | "inside" | Position of data labels relative to each bar. |
| LabelFormat | string? | null | ECharts label format template for data labels. |
| DataZoom | bool | false | Enables a zoom slider for the polar bar chart. |
| Toolbox | bool | false | Shows the ECharts toolbox with save-as-image controls. |
| ColorPalette | List<string>? | null | Color palette applied to bars across the chart. |
| AnimationDuration | int? | null | Entry animation duration in milliseconds for the bars. |
| AnimationEasing | string? | null | ECharts easing function name used during bar animations. |