Practical Programming in Tcl & Tk, Third Edition

Canvas Objects

The next several sections describe the built-in object types for the canvas: arc, bitmap, image, line, oval, polygon, rectangle, text, and window. Each object has its own set of attributes, and some attributes are found on most or all object types. Every object has a -tags attribute used to label the object with a list of symbolic names. Most objects, even text, specify their color with the -fill attribute. Only the bitmap uses -foreground and -background. If the object has a border, the color of the border is specified with -outline, and the thickness of the outline is specified with -width.

Arc Items

An arc is a section of an oval. The dimensions of the oval are determined by four coordinates that are its bounding box. The arc ...