Perl/Tk Pocket Reference

10 Perl/Tk Pocket Reference

Canvas Commands

$canvas->addtag(tag, searchSpec ?, arg, arg ... ?);

Adds tag to the list of tags associated with each item that

satisfies searchSpec. See Canvas Search Specifications

below.

$canvas->bbox(tagOrId ?, tagOrId ... ?);

Returns a list (x1, y1, x2, y2) giving an approximate

bounding box for all the items named by the tagOrId

arguments.

$canvas->bind(tagOrId ?, sequence => callback ?);

Associates callback to be invoked on events specified

with sequence with the items given by tagOrId. Use the

CanvasBind method to create a binding for the canvas as

a whole.

$canvas->canvasx(screenx ?, gridspacing ?);

Returns the canvas x-coordinate that is displayed at screen

x-coordinate screenx, possibly rounding to nearest multi-

ple of gridspacing units.

$canvas->canvasy(screeny ?, gridspacing ?);

Returns the canvas x-coordinate that is displayed at screen

y-coordinate screeny, possibly rounding to nearest multi-

ple of gridspacing units.

$canvas->coords(tagOrId ?, x0, y0 ... ?);

Queries or modifies the coordinates that define an item.

$canvas->createType(x, y ?, x, y ... ??, -option=>value ... ?);

Creates a new item of type Type at specified coordinates

and with list options. Currently Type may be: Arc, Bitmap,

Image, Line, Oval, Polygon, Rectangle, Text, or Window.

$canvas->dchars(tagOrId, first ?, last ?);

For items given by tagOrId, deletes the characters in the

range given by first and ...