Tk::ProgressBar(3pm) perl/Tk Documentation Tk::ProgressBar(3pm)
NAME
Tk::ProgressBar - A graphical progress bar
SYNOPSIS
use Tk::ProgressBar;
$progress = $parent->ProgressBar(
-width => 20,
-length => 200,
-anchor => 's',
-from => 0,
-to => 100,
-blocks => 10,
-colors => [0, 'green', 50, 'yellow' , 80, 'red'],
-variable => \$percent_done
);
$progress->value($position);
DESCRIPTION
Tk::ProgressBar provides a widget which will show a graphical
representation of a value, given maximum and minimum reference values.
STANDARD OPTIONS
The following standard widget options are supported:
-borderwidth
-highlightthickness
Defaults to 0.
-padx
Defaults to 0.
-pady
Defaults to 0.
-relief
Defaults to "sunken"
-troughcolor
The color to be used for the background (trough) of the progress
bar. Default is to use grey55.
WIDGET-SPECIFIC OPTIONS
-anchor
This can be used to position the start point of the bar. Default is
'w' (horizontal bar starting from the left). A vertical bar can be
configured by using either 's' or 'n'.
-blocks
This controls the number of blocks to be used to construct the
progress bar. The default is to break the bar into 10 blocks.
-colors
Controls the colors to be used for different positions of the
progress bar. The colors should be supplied as a reference to an
array containing pairs of positions and colors.
-colors => [ 0, 'green', 50, 'red' ]
means that for the range 0 to 50 the progress bar should be green
and for higher values it should be red.
-from
This sets the lower limit of the progress bar. If the bar is set to
a value below the lower limt no bar will be displayed. Defaults to
0. See the "-to" description for more information.
-gap
This is the spacing (in pixels) between each block. Defaults to 1.
Use 0 to get a continuous bar.
-length
Specifies the desired long dimension of the ProgressBar in screen
units (i.e. any of the forms acceptable to Tk_GetPixels). For
vertical ProgressBars this is the ProgressBars height; for
horizontal scales it is the ProgressBars width. The default length
is calculated from the values of "-padx", "-borderwidth",
"-highlightthickness" and the difference between "-from" and "-to".
-resolution
A real value specifying the resolution for the scale. If this value
is greater than zero then the scale's value will always be rounded
to an even multiple of this value, as will tick marks and the
endpoints of the scale. If the value is less than zero then no
rounding occurs. Defaults to 1 (i.e., the value will be integral).
-to This sets the upper limit of the progress bar. If a value is
specified (for example, using the "value" method) that lies above
this value the full progress bar will be displayed. Defaults to 100.
-variable
Specifies the reference to a scalar variable to link to the
ProgressBar. Whenever the value of the variable changes, the
ProgressBar will update to reflect this value. (See also the value
method below.)
-value
This can be used to set the current position of the progress bar
when used in conjunction with the standard "configure". It is
usually recommended to use the value method instead.
-width
Specifies the desired narrow dimension of the ProgressBar in screen
units (i.e. any of the forms acceptable to Tk_GetPixels). For
vertical ProgressBars this is the ProgressBars width; for horizontal
bars this is the ProgressBars height. The default width is derived
from the values of "-borderwidth" and "-pady" and
"-highlightthickness".
WIDGET METHODS
$ProgressBar->value(?value?)
If value is omitted, returns the current value of the ProgressBar.
If value is given, the value of the ProgressBar is set. If $value is
given but undefined the value of the option -from is used.
AUTHOR
Graham Barr <gbarr@pobox.com>
COPYRIGHT
Copyright (c) 1997-1998 Graham Barr. All rights reserved. This program
is free software; you can redistribute it and/or modify it under the
same terms as Perl itself.
Tk804.036 2025-04-13 Tk::ProgressBar(3pm)
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