Advanced Perl Programming

Scale

Table A-13. Scale Methods and Properties

Properties	Description
command	Specifies a reference to a Perl subroutine, which is called when the scale’s value is changed.
variable	Reference to a variable to be updated whenever the slider moves. Conversely, if you want the slider to move, you can change the variable.
width, length	Specifies the width and the length of the scale in pixels. Note that it doesn’t support a property called height.
orient	Horizontal or vertical.
from, to	Real numbers.
resolution	If greater than 0, the value displayed and returned is always in even multiples of this value. Defaults to 1.
tickinterval	Spacing between numerical tick marks. If 0, no tick marks are displayed.
label, font	A label to be displayed on the top or the left of the slider (depending on orientation).
Methods
set(value)	Same as updating the variable to the given value.