1Tk::ProgressBar(3)           perl/Tk Documentation          Tk::ProgressBar(3)
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NAME

6       Tk::ProgressBar - A graphical progress bar
7

SYNOPSIS

9           use Tk::ProgressBar;
10
11           $progress = $parent->ProgressBar(
12               -width => 20,
13               -length => 200,
14               -anchor => 's',
15               -from => 0,
16               -to => 100,
17               -blocks => 10,
18               -colors => [0, 'green', 50, 'yellow' , 80, 'red'],
19               -variable => \$percent_done
20           );
21
22           $progress->value($position);
23

DESCRIPTION

25       Tk::ProgressBar provides a widget which will show a graphical
26       representation of a value, given maximum and minimum reference values.
27

STANDARD OPTIONS

29       The following standard widget options are supported:
30
31       -borderwidth
32       -highlightthickness
33           Defaults to 0.
34
35       -padx
36           Defaults to 0.
37
38       -pady
39           Defaults to 0.
40
41       -relief
42           Defaults to "sunken"
43
44       -troughcolor
45           The color to be used for the background (trough) of the progress
46           bar.  Default is to use grey55.
47

WIDGET-SPECIFIC OPTIONS

49       -anchor
50           This can be used to position the start point of the bar. Default is
51           'w' (horizontal bar starting from the left). A vertical bar can be
52           configured by using either 's' or 'n'.
53
54       -blocks
55           This controls the number of blocks to be used to construct the
56           progress bar. The default is to break the bar into 10 blocks.
57
58       -colors
59           Controls the colors to be used for different positions of the
60           progress bar.  The colors should be supplied as a reference to an
61           array containing pairs of positions and colors.
62
63             -colors => [ 0, 'green', 50, 'red' ]
64
65           means that for the range 0 to 50 the progress bar should be green
66           and for higher values it should be red.
67
68       -from
69           This sets the lower limit of the progress bar.  If the bar is set
70           to a value below the lower limt no bar will be displayed. Defaults
71           to 0.  See the "-to" description for more information.
72
73       -gap
74           This is the spacing (in pixels) between each block. Defaults to 1.
75           Use 0 to get a continuous bar.
76
77       -length
78           Specifies the desired long dimension of the ProgressBar in screen
79           units (i.e. any of the forms acceptable to Tk_GetPixels). For
80           vertical ProgressBars this is the ProgressBars height; for
81           horizontal scales it is the ProgressBars width.  The default length
82           is calculated from the values of "-padx", "-borderwidth",
83           "-highlightthickness" and the difference between "-from" and "-to".
84
85       -resolution
86           A real value specifying the resolution for the scale. If this value
87           is greater than zero then the scale's value will always be rounded
88           to an even multiple of this value, as will tick marks and the
89           endpoints of the scale. If the value is less than zero then no
90           rounding occurs. Defaults to 1 (i.e., the value will be integral).
91
92       -to This sets the upper limit of the progress bar. If a value is
93           specified (for example, using the "value" method) that lies above
94           this value the full progress bar will be displayed. Defaults to
95           100.
96
97       -variable
98           Specifies the reference to a scalar variable to link to the
99           ProgressBar.  Whenever the value of the variable changes, the
100           ProgressBar will update to reflect this value. (See also the value
101           method below.)
102
103       -value
104           This can be used to set the current position of the progress bar
105           when used in conjunction with the standard "configure". It is
106           usually recommended to use the value method instead.
107
108       -width
109           Specifies the desired narrow dimension of the ProgressBar in screen
110           units (i.e.  any of the forms acceptable to Tk_GetPixels). For
111           vertical ProgressBars this is the ProgressBars width; for
112           horizontal bars this is the ProgressBars height.  The default width
113           is derived from the values of "-borderwidth" and "-pady" and
114           "-highlightthickness".
115

WIDGET METHODS

117       $ProgressBar->value(?value?)
118           If value is omitted, returns the current value of the ProgressBar.
119           If value is given, the value of the ProgressBar is set. If $value
120           is given but undefined the value of the option -from is used.
121

AUTHOR

123       Graham Barr <gbarr@pobox.com>
124

126       Copyright (c) 1997-1998 Graham Barr. All rights reserved.  This program
127       is free software; you can redistribute it and/or modify it under the
128       same terms as Perl itself.
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132Tk804.034                         2020-01-30                Tk::ProgressBar(3)
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