DrawEllipse(IDrawingPen,Single,Single,Single,Single) Method (DrawingEngine)

In This Topic

Draws an ellipse.

Syntax

Visual Basic
C#
Managed Extensions for C++
C++/CLI

'Declaration

Public Overloads Sub DrawEllipse( _
   ByVal penThe pen that determines the color, width, and style of the rectangle.
 As IDrawingPen, _
   ByVal xThe x-coordinate of the upper-left corner of the bounding rectangle that defines the ellipse.
 As Single, _
   ByVal yThe y-coordinate of the upper-left corner of the bounding rectangle that defines the ellipse.
 As Single, _
   ByVal widthThe width of the bounding rectangle that defines the ellipse.
 As Single, _
   ByVal heightThe height of the bounding rectangle that defines the ellipse.
 As Single _
)

public void DrawEllipse(
   IDrawingPen pen, 
   float x, 
   float y, 
   float width, 
   float height
)

public: void DrawEllipse(
   IDrawingPen* pen, 
   float x, 
   float y, 
   float width, 
   float height
)

public:
void DrawEllipse(
   IDrawingPen^ pen, 
   float x, 
   float y, 
   float width, 
   float height
)

Parameters

pen: The pen that determines the color, width, and style of the rectangle.
x: The x-coordinate of the upper-left corner of the bounding rectangle that defines the ellipse.
y: The y-coordinate of the upper-left corner of the bounding rectangle that defines the ellipse.
width: The width of the bounding rectangle that defines the ellipse.
height: The height of the bounding rectangle that defines the ellipse.

Example

Here is an example that shows how to draw ellipse 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: .NET9; .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

Overload List

Send Feedback