Graphics Objects

The module provides the following classes of drawable objects: Point, Line, Circle, Oval, Rectangle, Polygon, and Text. All objects are initially created unfilled with a black outline. All graphics objects support the following generic set of methods:

setFill(color)

Sets the interior of the object to the given color.

setOutline(color)

Sets the outline of the object to the given color.

setWidth(pixels)

Sets the width of the outline of the object to this many pixels. (Does not work for Point.)

draw(aGraphWin)

Draws the object into the given GraphWin. An object may only be drawn in one window at a time.

undraw()

Undraws the object from a graphics window. Returns silently if object is not drawn.

move(dx,dy)

Moves the object dx units in the $x$ direction and dy units in the $y$ direction. If the object is currently drawn, its image is adjusted to the new position.

clone()

Returns a duplicate of the object. Clones are always created in an undrawn state. Other than that, they are identical to the cloned object.