Perl/Tk Pocket Reference

4. The Canvas Widget 9

4. The Canvas Widget

Canvas Options

-closeenough => float

How close the mouse cursor must be to an item before it

is considered to be “inside” the item.

-confine => boolean

Whether it is allowable to set the canvas’s view outside

the scroll region.

-scrollregion => [corners ]

Array reference of four coordinates describing the left,

top, right, and bottom of a rectangular scrolling region.

-xscrollincrement => distance

Specifies the increment for horizontal scrolling in screen

units.

-yscrollincrement => distance

Specifies the increment for vertical scrolling in screen units.

Coordinate examples: 5 (pixel), 2.2i (inch), 4.1c (cm), 3m

(mm), 21p (pts)

Larger y-coordinates refer to points lower on the screen;

larger x-coordinates refer to points farther to the right.

Character positions: charIndex,

end, insert, sel.first,

sel.last, @x,y

-background -insertontime

-borderwidth -insertwidth

-cursor -relief

-height -selectbackground

-highlightbackground -selectborderwidth

-highlightcolor -selectforeground

-highlightthickness -takefocus

-insertbackground -width

-insertborderwidth -xscrollcommand

-insertofftime -yscrollcommand