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+'\"
+'\" Copyright (c) 1990-1994 The Regents of the University of California.
+'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
+'\"
+'\" See the file "license.terms" for information on usage and redistribution
+'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+'\" 
+.\" The -*- nroff -*- definitions below are for supplemental macros used
+.\" in Tcl/Tk manual entries.
+.\"
+.\" .AP type name in/out ?indent?
+.\"	Start paragraph describing an argument to a library procedure.
+.\"	type is type of argument (int, etc.), in/out is either "in", "out",
+.\"	or "in/out" to describe whether procedure reads or modifies arg,
+.\"	and indent is equivalent to second arg of .IP (shouldn't ever be
+.\"	needed;  use .AS below instead)
+.\"
+.\" .AS ?type? ?name?
+.\"	Give maximum sizes of arguments for setting tab stops.  Type and
+.\"	name are examples of largest possible arguments that will be passed
+.\"	to .AP later.  If args are omitted, default tab stops are used.
+.\"
+.\" .BS
+.\"	Start box enclosure.  From here until next .BE, everything will be
+.\"	enclosed in one large box.
+.\"
+.\" .BE
+.\"	End of box enclosure.
+.\"
+.\" .CS
+.\"	Begin code excerpt.
+.\"
+.\" .CE
+.\"	End code excerpt.
+.\"
+.\" .VS ?version? ?br?
+.\"	Begin vertical sidebar, for use in marking newly-changed parts
+.\"	of man pages.  The first argument is ignored and used for recording
+.\"	the version when the .VS was added, so that the sidebars can be
+.\"	found and removed when they reach a certain age.  If another argument
+.\"	is present, then a line break is forced before starting the sidebar.
+.\"
+.\" .VE
+.\"	End of vertical sidebar.
+.\"
+.\" .DS
+.\"	Begin an indented unfilled display.
+.\"
+.\" .DE
+.\"	End of indented unfilled display.
+.\"
+.\" .SO ?manpage?
+.\"	Start of list of standard options for a Tk widget. The manpage
+.\"	argument defines where to look up the standard options; if
+.\"	omitted, defaults to "options". The options follow on successive
+.\"	lines, in three columns separated by tabs.
+.\"
+.\" .SE
+.\"	End of list of standard options for a Tk widget.
+.\"
+.\" .OP cmdName dbName dbClass
+.\"	Start of description of a specific option.  cmdName gives the
+.\"	option's name as specified in the class command, dbName gives
+.\"	the option's name in the option database, and dbClass gives
+.\"	the option's class in the option database.
+.\"
+.\" .UL arg1 arg2
+.\"	Print arg1 underlined, then print arg2 normally.
+.\"
+.\" .QW arg1 ?arg2?
+.\"	Print arg1 in quotes, then arg2 normally (for trailing punctuation).
+.\"
+.\" .PQ arg1 ?arg2?
+.\"	Print an open parenthesis, arg1 in quotes, then arg2 normally
+.\"	(for trailing punctuation) and then a closing parenthesis.
+.\"
+.\"	# Set up traps and other miscellaneous stuff for Tcl/Tk man pages.
+.if t .wh -1.3i ^B
+.nr ^l \n(.l
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+.\"	# Start an argument description
+.de AP
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+.\}
+.ta \\n()Au \\n()Bu
+.ie !"\\$3"" \{\
+\&\\$1 \\fI\\$2\\fP (\\$3)
+.\".b
+.\}
+.el \{\
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+.ie !"\\$2"" \{\
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+..
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+..
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+..
+.\"	# BE - end boxed text (draw box now)
+.de BE
+.nf
+.ti 0
+.mk ^t
+.ie n \l'\\n(^lu\(ul'
+.el \{\
+.\"	Draw four-sided box normally, but don't draw top of
+.\"	box if the box started on an earlier page.
+.ie !\\n(^b-1 \{\
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+.\}
+.el \}\
+\h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
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+..
+.\"	# Special macro to handle page bottom:  finish off current
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+.\"	Draw three-sided box if this is the box's first page,
+.\"	draw two sides but no top otherwise.
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+.el \h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c
+.\}
+.if \\n(^v \{\
+.nr ^x \\n(^tu+1v-\\n(^Yu
+\kx\h'-\\nxu'\h'|\\n(^lu+3n'\ky\L'-\\n(^xu'\v'\\n(^xu'\h'|0u'\c
+.\}
+.bp
+'fi
+.ev
+.if \\n(^b \{\
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+.\}
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+.\"	# DS - begin display
+.de DS
+.RS
+.nf
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+..
+.\"	# DE - end display
+.de DE
+.fi
+.RE
+.sp
+..
+.\"	# SO - start of list of standard options
+.de SO
+'ie '\\$1'' .ds So \\fBoptions\\fR
+'el .ds So \\fB\\$1\\fR
+.SH "STANDARD OPTIONS"
+.LP
+.nf
+.ta 5.5c 11c
+.ft B
+..
+.\"	# SE - end of list of standard options
+.de SE
+.fi
+.ft R
+.LP
+See the \\*(So manual entry for details on the standard options.
+..
+.\"	# OP - start of full description for a single option
+.de OP
+.LP
+.nf
+.ta 4c
+Command-Line Name:	\\fB\\$1\\fR
+Database Name:	\\fB\\$2\\fR
+Database Class:	\\fB\\$3\\fR
+.fi
+.IP
+..
+.\"	# CS - begin code excerpt
+.de CS
+.RS
+.nf
+.ta .25i .5i .75i 1i
+..
+.\"	# CE - end code excerpt
+.de CE
+.fi
+.RE
+..
+.\"	# UL - underline word
+.de UL
+\\$1\l'|0\(ul'\\$2
+..
+.\"	# QW - apply quotation marks to word
+.de QW
+.ie '\\*(lq'"' ``\\$1''\\$2
+.\"" fix emacs highlighting
+.el \\*(lq\\$1\\*(rq\\$2
+..
+.\"	# PQ - apply parens and quotation marks to word
+.de PQ
+.ie '\\*(lq'"' (``\\$1''\\$2)\\$3
+.\"" fix emacs highlighting
+.el (\\*(lq\\$1\\*(rq\\$2)\\$3
+..
+.\"	# QR - quoted range
+.de QR
+.ie '\\*(lq'"' ``\\$1''\\-``\\$2''\\$3
+.\"" fix emacs highlighting
+.el \\*(lq\\$1\\*(rq\\-\\*(lq\\$2\\*(rq\\$3
+..
+.\"	# MT - "empty" string
+.de MT
+.QW ""
+..
+.TH scale n 4.1 Tk "Tk Built-In Commands"
+.BS
+'\" Note:  do not modify the .SH NAME line immediately below!
+.SH NAME
+scale \- Create and manipulate scale widgets
+.SH SYNOPSIS
+\fBscale\fR \fIpathName \fR?\fIoptions\fR?
+.SO
+\-activebackground	\-foreground	\-relief
+\-background	\-highlightbackground	\-repeatdelay
+\-borderwidth	\-highlightcolor	\-repeatinterval
+\-cursor	\-highlightthickness	\-takefocus
+\-font	\-orient	\-troughcolor
+.SE
+.SH "WIDGET-SPECIFIC OPTIONS"
+.OP \-bigincrement bigIncrement BigIncrement
+Some interactions with the scale cause its value to change by
+.QW large
+increments;  this option specifies the size of the
+large increments.  If specified as 0, the large increments default
+to 1/10 the range of the scale.
+.OP \-command command Command
+Specifies the prefix of a Tcl command to invoke whenever the scale's
+value is changed via a widget command.
+The actual command consists
+of this option followed by a space and a real number indicating the
+new value of the scale.
+.OP \-digits digits Digits
+An integer specifying how many significant digits should be retained
+when converting the value of the scale to a string.
+If the number is less than or equal to zero, then the scale picks
+the smallest value that guarantees that every possible slider
+position prints as a different string.
+.OP \-from from From
+A real value corresponding to the left or top end of the scale.
+.OP \-label label Label
+A string to display as a label for the scale.  For
+vertical scales the label is displayed just to the right of the
+top end of the scale.  For horizontal scales the label is displayed
+just above the left end of the scale.  If the option is specified
+as an empty string, no label is displayed.
+.OP \-length length Length
+Specifies the desired long dimension of the scale in screen units
+(i.e. any of the forms acceptable to \fBTk_GetPixels\fR).
+For vertical scales this is the scale's height;  for horizontal scales
+it is the scale's width.
+.OP \-resolution resolution 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).
+.OP \-showvalue showValue ShowValue
+Specifies a boolean value indicating whether or not the current
+value of the scale is to be displayed.
+.OP \-sliderlength sliderLength SliderLength
+Specifies the size of the slider, measured in screen units along the slider's
+long dimension.  The value may be specified in any of the forms acceptable
+to \fBTk_GetPixels\fR.
+.OP \-sliderrelief sliderRelief SliderRelief
+Specifies the relief to use when drawing the slider, such as \fBraised\fR
+or \fBsunken\fR.
+.OP \-state state State
+Specifies one of three states for the scale:  \fBnormal\fR,
+\fBactive\fR, or \fBdisabled\fR.
+If the scale is disabled then the value may not be changed and the scale
+will not activate.
+If the scale is active, the slider is displayed using the color
+specified by the \fBactiveBackground\fR option.
+.OP \-tickinterval tickInterval TickInterval
+Must be a real value.
+Determines the spacing between numerical
+tick marks displayed below or to the left of the slider.
+If 0, no tick marks will be displayed.
+.OP \-to to To
+Specifies a real value corresponding
+to the right or bottom end of the scale.
+This value may be either less than or greater than the \fBfrom\fR option.
+.OP \-variable variable Variable
+Specifies the name of a global variable to link to the scale.  Whenever the
+value of the variable changes, the scale will update to reflect this
+value.
+Whenever the scale is manipulated interactively, the variable
+will be modified to reflect the scale's new value.
+.OP \-width width Width
+Specifies the desired narrow dimension of the trough in screen units
+(i.e. any of the forms acceptable to \fBTk_GetPixels\fR).
+For vertical scales this is the trough's width;  for horizontal scales
+this is the trough's height.
+.BE
+
+.SH DESCRIPTION
+.PP
+The \fBscale\fR command creates a new window (given by the
+\fIpathName\fR argument) and makes it into a scale widget.
+Additional
+options, described above, may be specified on the command line
+or in the option database
+to configure aspects of the scale such as its colors, orientation,
+and relief.  The \fBscale\fR command returns its
+\fIpathName\fR argument.  At the time this command is invoked,
+there must not exist a window named \fIpathName\fR, but
+\fIpathName\fR's parent must exist.
+.PP
+A scale is a widget that displays a rectangular \fItrough\fR and a
+small \fIslider\fR.  The trough corresponds to a range
+of real values (determined by the \fBfrom\fR, \fBto\fR, and
+\fBresolution\fR options),
+and the position of the slider selects a particular real value.
+The slider's position (and hence the scale's value) may be adjusted
+with the mouse or keyboard as described in the \fBBINDINGS\fR
+section below.  Whenever the scale's value is changed, a Tcl
+command is invoked (using the \fBcommand\fR option) to notify
+other interested widgets of the change.
+In addition, the value
+of the scale can be linked to a Tcl variable (using the \fBvariable\fR
+option), so that changes in either are reflected in the other.
+.PP
+Three annotations may be displayed in a scale widget:  a label
+appearing at the top right of the widget (top left for horizontal
+scales), a number displayed just to the left of the slider
+(just above the slider for horizontal scales), and a collection
+of numerical tick marks just to the left of the current value
+(just below the trough for horizontal scales).  Each of these three
+annotations may be enabled or disabled using the
+configuration options.
+.SH "WIDGET COMMAND"
+.PP
+The \fBscale\fR command creates a new Tcl command whose
+name is \fIpathName\fR.  This
+command may be used to invoke various
+operations on the widget.  It has the following general form:
+.CS
+\fIpathName option \fR?\fIarg arg ...\fR?
+.CE
+\fIOption\fR and the \fIarg\fRs
+determine the exact behavior of the command.  The following
+commands are possible for scale widgets:
+.TP
+\fIpathName \fBcget\fR \fIoption\fR
+Returns the current value of the configuration option given
+by \fIoption\fR.
+\fIOption\fR may have any of the values accepted by the \fBscale\fR
+command.
+.TP
+\fIpathName \fBconfigure\fR ?\fIoption\fR? ?\fIvalue option value ...\fR?
+Query or modify the configuration options of the widget.
+If no \fIoption\fR is specified, returns a list describing all of
+the available options for \fIpathName\fR (see \fBTk_ConfigureInfo\fR for
+information on the format of this list).  If \fIoption\fR is specified
+with no \fIvalue\fR, then the command returns a list describing the
+one named option (this list will be identical to the corresponding
+sublist of the value returned if no \fIoption\fR is specified).  If
+one or more \fIoption\-value\fR pairs are specified, then the command
+modifies the given widget option(s) to have the given value(s);  in
+this case the command returns an empty string.
+\fIOption\fR may have any of the values accepted by the \fBscale\fR
+command.
+.TP
+\fIpathName \fBcoords \fR?\fIvalue\fR?
+Returns a list whose elements are the x and y coordinates of
+the point along the centerline of the trough that corresponds
+to \fIvalue\fR.
+If \fIvalue\fR is omitted then the scale's current value is used.
+.TP
+\fIpathName \fBget\fR ?\fIx y\fR?
+If \fIx\fR and \fIy\fR are omitted, returns the current value
+of the scale.  If \fIx\fR and \fIy\fR are specified, they give
+pixel coordinates within the widget;  the command returns
+the scale value corresponding to the given pixel.
+Only one of \fIx\fR or \fIy\fR is used:  for horizontal scales
+\fIy\fR is ignored, and for vertical scales \fIx\fR is ignored.
+.TP
+\fIpathName \fBidentify\fR \fIx y\fR
+Returns a string indicating what part of the scale lies under
+the coordinates given by \fIx\fR and \fIy\fR.
+A return value of \fBslider\fR means that the point is over
+the slider;  \fBtrough1\fR means that the point is over the
+portion of the slider above  or to the left of the slider;
+and \fBtrough2\fR means that the point is over the portion
+of the slider below or to the right of the slider.
+If the point is not over one of these elements, an empty string
+is returned.
+.TP
+\fIpathName \fBset\fR \fIvalue\fR
+This command is invoked to change the current value of the scale,
+and hence the position at which the slider is displayed.  \fIValue\fR
+gives the new value for the scale.
+The command has no effect if the scale is disabled.
+.SH BINDINGS
+.PP
+Tk automatically creates class bindings for scales that give them
+the following default behavior.
+Where the behavior is different for vertical and horizontal scales,
+the horizontal behavior is described in parentheses.
+.IP [1]
+If button 1 is pressed in the trough, the scale's value will
+be incremented or decremented by the value of the \fBresolution\fR
+option so that the slider moves in the direction of the cursor. 
+If the button is held down, the action auto-repeats.
+.IP [2]
+If button 1 is pressed over the slider, the slider can be dragged
+with the mouse.
+.IP [3]
+If button 1 is pressed in the trough with the Control key down,
+the slider moves all the way to the end of its range, in the
+direction towards the mouse cursor.
+.IP [4]
+If button 2 is pressed, the scale's value is set to the mouse
+position.  If the mouse is dragged with button 2 down, the scale's
+value changes with the drag.
+.IP [5]
+The Up and Left keys move the slider up (left) by the value
+of the \fBresolution\fR option.
+.IP [6]
+The Down and Right keys move the slider down (right) by the value
+of the \fBresolution\fR option.
+.IP [7]
+Control-Up and Control-Left move the slider up (left) by the
+value of the \fBbigIncrement\fR option.
+.IP [8]
+Control-Down and Control-Right move the slider down (right) by the
+value of the \fBbigIncrement\fR option.
+.IP [9]
+Home moves the slider to the top (left) end of its range.
+.IP [10]
+End moves the slider to the bottom (right) end of its range.
+.PP
+If the scale is disabled using the \fBstate\fR option then
+none of the above bindings have any effect.
+.PP
+The behavior of scales can be changed by defining new bindings for
+individual widgets or by redefining the class bindings.
+
+.SH KEYWORDS
+scale, slider, trough, widget