Graphics::DrawPie Method (Pen^, RectangleF, Single, Single)


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

Namespace:   System.Drawing
Assembly:  System.Drawing (in System.Drawing.dll)

void DrawPie(
	Pen^ pen,
	RectangleF rect,
	float startAngle,
	float sweepAngle


Type: System.Drawing::Pen^

Pen that determines the color, width, and style of the pie shape.

Type: System.Drawing::RectangleF

RectangleF structure that represents the bounding rectangle that defines the ellipse from which the pie shape comes.

Type: System::Single

Angle measured in degrees clockwise from the x-axis to the first side of the pie shape.

Type: System::Single

Angle measured in degrees clockwise from the startAngle parameter to the second side of the pie shape.

Exception Condition

pen is null.

This method draws a pie shape defined by an arc of an ellipse and the two radial lines that intersect with the endpoints of the arc. The ellipse is defined by the bounding rectangle. The pie shape consists of the two radial lines defined by the startAngle and sweepAngle parameters, and the arc between the intersections of those radial lines with the ellipse.

If the sweepAngle parameter is greater than 360 degrees or less than -360 degrees, it is treated as if it were 360 degrees or -360 degrees, respectively.

The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, which is a parameter of the Paint event handler. The code performs the following actions:

  • Creates a black pen.

  • Creates a rectangle that bounds a complete ellipse.

  • Defines the angles at which to start drawing (relative to the x axis) and through which to draw (both in a clockwise direction).

  • Draws the pie segment to the screen.

   void DrawPieRectangleF( PaintEventArgs^ e )
      // Create pen.
      Pen^ blackPen = gcnew Pen( Color::Black,3.0f );

      // Create rectangle for ellipse.
      RectangleF rect = RectangleF(0.0F,0.0F,200.0F,100.0F);

      // Create start and sweep angles.
      float startAngle = 0.0F;
      float sweepAngle = 45.0F;

      // Draw pie to screen.
      e->Graphics->DrawPie( blackPen, rect, startAngle, sweepAngle );

.NET Framework
Available since 1.1
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