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Add Spider Chart Component to Radzen Blazor #2278

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ehabhussein Sep 5, 2025
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ehabhussein Sep 5, 2025
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Merge branch 'radzenhq:master' into master
ehabhussein Sep 27, 2025
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Merge branch 'radzenhq:master' into master
ehabhussein Oct 1, 2025
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ehabhussein Oct 1, 2025
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Clean up .gitignore by removing duplicates
ehabhussein Oct 2, 2025
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cleanup .gitignore
ehabhussein Oct 2, 2025
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5 changes: 0 additions & 5 deletions .gitignore
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Original file line number Diff line number Diff line change
Expand Up @@ -342,8 +342,3 @@ Radzen.DocFX/api/*.yml
!Radzen.DocFX/api/index.md
Radzen.DocFX/api/.manifest
Radzen.Blazor.min.js
/.claude
/SANKEY_PATTERN_COMPARISON.md
*.md
/.gitignore
/.gitignore
134 changes: 134 additions & 0 deletions Radzen.Blazor/RadzenSpiderChart.razor
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@@ -0,0 +1,134 @@
@typeparam TItem
@inherits RadzenComponent
@using Radzen.Blazor.Rendering

<CascadingValue Value="@this" IsFixed="true">
<div @ref="@Element" class="@GetComponentCssClass() rz-scheme-@(ColorScheme.ToString().ToLower()) @GetCssClass()" style="@Style" @attributes="Attributes">
@ChildContent
@if (Width != null && Height != null && Series?.Any() == true)
{
<div class="rz-spider-chart-wrapper @GetLegendPositionClass()" style="display: flex !important; flex-direction: row !important;" @onmouseleave="OnChartMouseLeave">
<svg viewBox="0 0 @Width @Height">
<g class="rz-spider-chart-grid">
@* Diagonal lines first (bottom layer) *@
@foreach (var category in GetAllCategories())
{
var index = GetCategoryIndex(category);
var (x1, y1) = GetPoint(index, MinValue);
var (x2, y2) = GetPoint(index, MaxValue);
<line x1="@x1" y1="@y1" x2="@x2" y2="@y2"
stroke="var(--rz-text-secondary-color, #999)"
stroke-width="1"
opacity="0.5"
class="rz-spider-chart-grid-line" />
}

@* Grid shapes second (top layer) *@
@for (int i = 1; i <= 5; i++)
{
@if (GridShape == SpiderChartGridShape.Circular)
{
var centerX = Width.Value / 2;
var centerY = Height.Value / 2;
var radius = Math.Min(centerX, centerY) * 0.8 * (i / 5.0);
<circle cx="@centerX" cy="@centerY" r="@radius"
fill="none"
stroke="var(--rz-border-color, #e0e0e0)"
stroke-width="1"
opacity="0.7"
class="rz-spider-chart-grid-circle" />
}
else
{
<path d="@GetGridPath(i / 5.0)"
fill="none"
stroke="var(--rz-border-color, #e0e0e0)"
stroke-width="1"
opacity="0.7"
class="rz-spider-chart-grid-polygon" />
}
}
</g>

<g class="rz-spider-chart-areas">
@foreach (var series in VisibleSeries)
{
var path = GetSeriesPath(series);
var isHovered = HoveredSeries == series;
var shouldShow = !IsLegendHover || HoveredSeries == null || HoveredSeries == series;
var localSeries = series;

<path d="@path"
class="rz-spider-chart-area rz-series-@(series.Index) @(isHovered && IsLegendHover ? "rz-state-hover" : "") @(!shouldShow ? "rz-state-hidden" : "")"
data-stroke-width="@series.StrokeWidth"
fill-opacity="0.3"
@onclick="@(args => OnSeriesClick(localSeries, args))"
@onmouseenter="@(args => { OnAreaMouseEnter((MouseEventArgs)args, localSeries); })"
@onmouseleave="OnAreaMouseLeave" />
}
</g>

@if (ShowMarkers)
{
@* First layer: Render all visible markers *@
<g class="rz-spider-chart-markers">
@foreach (var series in VisibleSeries)
{
@if (series.MarkersVisible)
{
var isHovered = series == HoveredSeries;
var shouldShow = !IsLegendHover || HoveredSeries == null || HoveredSeries == series;
@foreach (var category in GetAllCategories())
{
var value = GetSeriesValue(series, category);
var index = GetCategoryIndex(category);
var (x, y) = GetPoint(index, value);

<circle cx="@x" cy="@y" r="@series.MarkerSize"
class="rz-spider-chart-marker rz-series-@(series.Index) @(isHovered && IsLegendHover ? "rz-state-hover" : "") @(!shouldShow ? "rz-state-hidden" : "")"
pointer-events="none" />
}
}
}
</g>

@* Second layer: Interactive hit areas rendered AFTER visual markers so they're on top *@
<g class="rz-spider-chart-hit-areas">
@foreach (var series in VisibleSeries)
{
@if (series.MarkersVisible)
{
@foreach (var category in GetAllCategories())
{
var value = GetSeriesValue(series, category);
var index = GetCategoryIndex(category);
var (x, y) = GetPoint(index, value);
var localSeries = series;
var localCategory = category;
var localValue = value;

<circle cx="@x" cy="@y" r="10"
fill="transparent"
stroke="transparent"
class="rz-spider-chart-hit-area"
@onmouseenter="@(args => OnMarkerMouseEnter((MouseEventArgs)args, localSeries, localCategory, localValue))"
@onmouseleave="OnMarkerMouseLeave" />
}
}
}
</g>
}

<g class="rz-spider-chart-labels">
@RenderLabels()
</g>
</svg>

@{
var key = string.Join(",", Series.Select(s => s.IsVisible ? "1" : "0"));
}
<Radzen.Blazor.Rendering.SpiderLegend TItem="TItem" @key="key" />
</div>
}
</div>
</CascadingValue>
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