TfpgCanvasBase.DrawArc

Draws an outline arc shape

Declaration

Source position: fpg_base.pas line 387

Description

Draws an outline arc shape. It uses the TfpgCanvas.Color value to draw the arc.

x

The left x co-ordinate of the arc drawing position

y

The top y co-ordinate of the arc drawing position

w

The width of the whole arc

h

The height of the whole arc

a1

This is the starting point of the arc. A value of 0 is the 3 o'clock position. A value of 270 is the 6 o'clock position. Positive values move counter-clockwise, and negative values move clockwise.

a2

This parameter is the length of the arc in degrees. A positive value goes counter-clockwise, and a negative values goes clockwise.

See also

Example

{ This will draw a red arc, starting at the 6 o'clock position, and
  drawing 90 degrees of the arc, ending at the 3 o'clock position. }
procedure TMainForm.FormPaint;  // the forms OnPaint event handler
begin
  Canvas.Color := clRed;
  Canvas.DrawArc(5, 5, 100, 100, 270, 90);
end;