6.3. The canvas arc object

An arc object on a canvas, in its most general form, is a wedge-shaped slice taken out of an ellipse. This includes whole ellipses and circles as special cases. See Section 6.7, “The canvas oval object” for more on the geometry of the ellipse drawn.

To create an arc object on a canvas C, use:

    id = C.create_arc ( x0, y0, x1, y1, option, ... )

The constructor returns the object ID of the new arc object on canvas C.

Point (x0, y0) is the top left corner and (x1, y1) the lower right corner of a rectangle into which the ellipse is fit. If this rectangle is square, you get a circle.

The various options include:

`extent`	Width of the slice in degrees. The slice starts at the angle given by the `start` option and extends counterclockwise for `extent` degrees.
`fill`	By default, the interior of an arc is transparent, and `fill=""` will select this behavior. You can also set this option to any color and the interior of the arc will be filled with that color.
`outline`	The color of the border around the outside of the slice. Default is black.
`outlinestipple`	If the `outline` option is used, this option specifies a bitmap used to stipple the border. Default is black, and that default can be specified by setting `outlinestipple=""`.
`start`	Starting angle for the slice, in degrees, measured from +x direction. If omitted, you get the entire ellipse.
`stipple`	A bitmap indicating how the interior fill of the arc will be stippled. Default is `stipple=""` (solid). You'll probably want something like `stipple="gray25"`. Has no effect unless `fill` has been set to some color.
`style`	The default is to draw the whole arc; use `style=PIESLICE` for this style. To draw only the circular arc at the edge of the slice, use `style=ARC`. To draw the circular arc and the chord (a straight line connecting the endpoints of the arc), use `style=CHORD`.
`width`	Width of the border around the outside of the arc. Default is 1 pixel.

Tkinter reference: a GUI for Python

6.3. The canvas arc object