private/charts/New-ChartPieSlice.ps1
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function New-ChartPieSlice { <# .SYNOPSIS Creates a pie slice path geometry with stroke outline. #> param($CenterX, $CenterY, $Radius, $StartAngle, $SweepAngle, $PaletteEntry) # Sweep angle over 360 degrees (one data point) is a full circle, which is drawn as an EllipseGeometry rather than a path if ($SweepAngle -ge 360) { $geometry = [System.Windows.Media.EllipseGeometry]::new([System.Windows.Point]::new($CenterX, $CenterY), $Radius, $Radius) } else { $startRad = $StartAngle * [math]::PI / 180 $endRad = ($StartAngle + $SweepAngle) * [math]::PI / 180 $startX = $CenterX + ($Radius * [math]::Cos($startRad)) $startY = $CenterY + ($Radius * [math]::Sin($startRad)) $endX = $CenterX + ($Radius * [math]::Cos($endRad)) $endY = $CenterY + ($Radius * [math]::Sin($endRad)) $isLargeArc = $SweepAngle -gt 180 $pathFigure = [System.Windows.Media.PathFigure]::new() $pathFigure.StartPoint = [System.Windows.Point]::new($CenterX, $CenterY) $pathFigure.IsClosed = $true # Line from center to arc start $lineToStart = [System.Windows.Media.LineSegment]::new([System.Windows.Point]::new($startX, $startY), $true) [void]$pathFigure.Segments.Add($lineToStart) # Arc segment $arcSegment = [System.Windows.Media.ArcSegment]::new() $arcSegment.Point = [System.Windows.Point]::new($endX, $endY) $arcSegment.Size = [System.Windows.Size]::new($Radius, $Radius) $arcSegment.IsLargeArc = $isLargeArc $arcSegment.SweepDirection = [System.Windows.Media.SweepDirection]::Clockwise [void]$pathFigure.Segments.Add($arcSegment) $geometry = [System.Windows.Media.PathGeometry]::new() [void]$geometry.Figures.Add($pathFigure) } # Slice with subtle stroke for separation between segments $path = [System.Windows.Shapes.Path]@{ Data = $geometry StrokeThickness = 1.5 } $path.SetResourceReference([System.Windows.Shapes.Shape]::StrokeProperty, 'ControlBackgroundBrush') # Apply fill with resource binding Set-ChartShapeFill -Shape $path -PaletteEntry $PaletteEntry return $path } |