DrawPie(IDrawingPen,RectangleF,Single,Single) Method (DrawingEngine)

In This Topic

Draws a pie shape defined by an ellipse specified by a System.Drawing.RectangleF structure and two radial lines.

Syntax

'Declaration

Public Sub DrawPie( _
   ByVal penIDrawingPen that determines the color, width, and style of the pie shape.
 As IDrawingPen, _
   ByVal rectSystem.Drawing.RectangleF structure that represents the bounding rectangle that defines the ellipse from which the pie section comes.
 As System.Drawing.RectangleF, _
   ByVal startAngleAngle in degrees measured clockwise from the x-axis to the first side of the pie section.
 As Single, _
   ByVal sweepAngleAngle in degrees measured clockwise from the startAngle parameter to the second side of the pie section.
 As Single _
)

public void DrawPie(
   IDrawingPen pen, 
   System.Drawing.RectangleF rect, 
   float startAngle, 
   float sweepAngle
)

public: void DrawPie(
   IDrawingPen* pen, 
   System.Drawing.RectangleF* rect, 
   float startAngle, 
   float sweepAngle
)

public:
void DrawPie(
   IDrawingPen^ pen, 
   System.Drawing.RectangleF^ rect, 
   float startAngle, 
   float sweepAngle
)

Parameters

pen: IDrawingPen that determines the color, width, and style of the pie shape.
rect: System.Drawing.RectangleF structure that represents the bounding rectangle that defines the ellipse from which the pie section comes.
startAngle: Angle in degrees measured clockwise from the x-axis to the first side of the pie section.
sweepAngle: Angle in degrees measured clockwise from the startAngle parameter to the second side of the pie section.

Example

Here is an example that shows how to draw pie using drawing engine.

VB.NET


''' <summary>
''' Draws primitives (rectangle, ellipse, arc, pie, curve) on specified drawing engine.
''' </summary>
''' <param name="drawingEngine">Drawing engine.</param>
''' <param name="area">Area to draw objects in.</param>
Public Shared Sub DrawPrimitivesExample(drawingEngine As DrawingEngine, area As RectangleF)
    Using brush As IDrawingBrush = drawingEngine.DrawingFactory.CreateSolidBrush(Color.LightGreen)
        Using pen As IDrawingPen = drawingEngine.DrawingFactory.CreatePen(Color.Red, 2F)
            ' draw rectangle
            Dim figureRect As New RectangleF(area.X, area.Y, area.Width * 0.47F, area.Height * 0.47F)
            drawingEngine.FillRectangle(brush, figureRect)
            drawingEngine.DrawRectangle(pen, figureRect)

            ' draw ellipse
            figureRect = New RectangleF(area.Width * 0.53F, area.Y, area.Width * 0.47F, area.Height * 0.47F)
            drawingEngine.FillEllipse(brush, figureRect)
            drawingEngine.DrawEllipse(pen, figureRect)

            ' draw arc
            figureRect = New RectangleF(area.X, area.Height * 0.53F, area.Width * 0.47F, area.Height * 0.47F)
            drawingEngine.FillArc(brush, figureRect, 90, 140)
            drawingEngine.DrawArc(pen, figureRect, 90, 140)

            ' draw pie
            drawingEngine.FillPie(brush, figureRect, -50, 50)
            drawingEngine.DrawPie(pen, figureRect, -50, 50)

            ' create graphics path
            Using path As IGraphicsPath = drawingEngine.DrawingFactory.CreateGraphicsPath()
                ' create curve points
                Dim startPoint As New PointF(area.Width * 0.53F, area.Height * 0.53F)

                Dim curvePoints As PointF() = New PointF() {startPoint, New PointF(startPoint.X * 1.3F, startPoint.Y * 1.8F), New PointF(startPoint.X * 1.7F, startPoint.Y * 1.2F), New PointF(area.Width * 0.99F, area.Height * 0.99F)}

                ' add curve to path
                path.AddCurve(curvePoints, 0.5F)
                ' draw path
                drawingEngine.FillPath(brush, path)
                drawingEngine.DrawPath(pen, path)
            End Using
        End Using
    End Using
End Sub


/// <summary>
/// Draws primitives (rectangle, ellipse, arc, pie, curve) on specified drawing engine.
/// </summary>
/// <param name="drawingEngine">Drawing engine.</param>
/// <param name="area">Area to draw objects in.</param>
public static void DrawPrimitivesExample(DrawingEngine drawingEngine, RectangleF area)
{
    using (IDrawingBrush brush = drawingEngine.DrawingFactory.CreateSolidBrush(Color.LightGreen))
    using (IDrawingPen pen = drawingEngine.DrawingFactory.CreatePen(Color.Red, 2f))
    {
        // draw rectangle
        RectangleF figureRect = new RectangleF(area.X, area.Y, area.Width * 0.47f, area.Height * 0.47f);
        drawingEngine.FillRectangle(brush, figureRect);
        drawingEngine.DrawRectangle(pen, figureRect);

        // draw ellipse
        figureRect = new RectangleF(area.Width * 0.53f, area.Y, area.Width * 0.47f, area.Height * 0.47f);
        drawingEngine.FillEllipse(brush, figureRect);
        drawingEngine.DrawEllipse(pen, figureRect);

        // draw arc
        figureRect = new RectangleF(area.X, area.Height * 0.53f, area.Width * 0.47f, area.Height * 0.47f);
        drawingEngine.FillArc(brush, figureRect, 90, 140);
        drawingEngine.DrawArc(pen, figureRect, 90, 140);

        // draw pie
        drawingEngine.FillPie(brush, figureRect, -50, 50);
        drawingEngine.DrawPie(pen, figureRect, -50, 50);

        // create graphics path
        using (IGraphicsPath path = drawingEngine.DrawingFactory.CreateGraphicsPath())
        {
            // create curve points
            PointF startPoint = new PointF(area.Width * 0.53f, area.Height * 0.53f);

            PointF[] curvePoints = new PointF[]
            {
                startPoint,
                new PointF(startPoint.X * 1.3f, startPoint.Y * 1.8f),
                new PointF(startPoint.X * 1.7f, startPoint.Y * 1.2f),
                new PointF(area.Width * 0.99f, area.Height * 0.99f)
            };

            // add curve to path
            path.AddCurve(curvePoints, 0.5f);
            // draw path
            drawingEngine.FillPath(brush, path);
            drawingEngine.DrawPath(pen, path);
        }
    }
}

Requirements

Target Platforms: .NET 10; .NET 9; .NET 8; .NET 7; .NET 6; .NET Framework 4.8, 4.7, 4.6, 4.5, 4.0, 3.5

Reference

DrawingEngine Class
DrawingEngine Members

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