subclass of Widget
A CanvasObject is not a widget type. It is a class whose objects can
be associated with a canvas widget. When a CanvasObject instance is
associated with a canvas, it will draw on this canvas.
Several CanvasObject objects can be associated
with the same canvas.
CanvasObject specific options
BarcHart objects support the following options in its configure method
- name of canvas to draw the barchart
- area in which to diplay the chart (a list of four numbers)
- display a rectangle with this width showing the area
- color of area rectangle
CanvasObject specific methods
pathname configure ?option? ?value? ?option value ...?
pathname cget option