'\"
'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
'\" Copyright (c) 2004 Joe English
'\"
'\" 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
.ad b
.\"	# Start an argument description
.de AP
.ie !"\\$4"" .TP \\$4
.el \{\
.   ie !"\\$2"" .TP \\n()Cu
.   el          .TP 15
.\}
.ta \\n()Au \\n()Bu
.ie !"\\$3"" \{\
\&\\$1 \\fI\\$2\\fP (\\$3)
.\".b
.\}
.el \{\
.br
.ie !"\\$2"" \{\
\&\\$1	\\fI\\$2\\fP
.\}
.el \{\
\&\\fI\\$1\\fP
.\}
.\}
..
.\"	# define tabbing values for .AP
.de AS
.nr )A 10n
.if !"\\$1"" .nr )A \\w'\\$1'u+3n
.nr )B \\n()Au+15n
.\"
.if !"\\$2"" .nr )B \\w'\\$2'u+\\n()Au+3n
.nr )C \\n()Bu+\\w'(in/out)'u+2n
..
.AS Tcl_Interp Tcl_CreateInterp in/out
.\"	# BS - start boxed text
.\"	# ^y = starting y location
.\"	# ^b = 1
.de BS
.br
.mk ^y
.nr ^b 1u
.if n .nf
.if n .ti 0
.if n \l'\\n(.lu\(ul'
.if n .fi
..
.\"	# 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 \{\
\h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
.\}
.el \}\
\h'-1.5n'\L'|\\n(^yu-1v'\h'\\n(^lu+3n'\L'\\n(^tu+1v-\\n(^yu'\l'|0u-1.5n\(ul'
.\}
.\}
.fi
.br
.nr ^b 0
..
.\"	# VS - start vertical sidebar
.\"	# ^Y = starting y location
.\"	# ^v = 1 (for troff;  for nroff this doesn't matter)
.de VS
.if !"\\$2"" .br
.mk ^Y
.ie n 'mc \s12\(br\s0
.el .nr ^v 1u
..
.\"	# VE - end of vertical sidebar
.de VE
.ie n 'mc
.el \{\
.ev 2
.nf
.ti 0
.mk ^t
\h'|\\n(^lu+3n'\L'|\\n(^Yu-1v\(bv'\v'\\n(^tu+1v-\\n(^Yu'\h'-|\\n(^lu+3n'
.sp -1
.fi
.ev
.\}
.nr ^v 0
..
.\"	# Special macro to handle page bottom:  finish off current
.\"	# box/sidebar if in box/sidebar mode, then invoked standard
.\"	# page bottom macro.
.de ^B
.ev 2
'ti 0
'nf
.mk ^t
.if \\n(^b \{\
.\"	Draw three-sided box if this is the box's first page,
.\"	draw two sides but no top otherwise.
.ie !\\n(^b-1 \h'-1.5n'\L'|\\n(^yu-1v'\l'\\n(^lu+3n\(ul'\L'\\n(^tu+1v-\\n(^yu'\h'|0u'\c
.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 \{\
.mk ^y
.nr ^b 2
.\}
.if \\n(^v \{\
.mk ^Y
.\}
..
.\"	# DS - begin display
.de DS
.RS
.nf
.sp
..
.\"	# 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 ttk::scrollbar n 8.5 Tk "Tk Themed Widget"
.BS
.SH NAME
ttk::scrollbar \- Control the viewport of a scrollable widget 
.SH SYNOPSIS
\fBttk::scrollbar\fR \fIpathName \fR?\fIoptions...\fR?
.BE
.SH DESCRIPTION
.PP
\fBttk::scrollbar\fR widgets are typically linked to an associated window
that displays a document of some sort, such as a file being edited or a
drawing.
A scrollbar displays a \fIthumb\fR in the middle portion of the scrollbar,
whose position and size provides information about the portion of the
document visible in the associated window.
The thumb may be dragged by the user to control the visible region.
Depending on the theme, two or more arrow buttons may also be present;
these are used to scroll the visible region in discrete units.
.SO ttk_widget
\-class	\-cursor	\-style
\-takefocus
.SE
.SH "WIDGET-SPECIFIC OPTIONS"
.OP \-command command Command
A Tcl script prefix to evaluate 
to change the view in the widget associated with the scrollbar.
Additional arguments are appended to the value of this option,
as described in \fBSCROLLING COMMANDS\fR below,
whenever the user requests a view change by manipulating the scrollbar.
.RS
.PP
This option typically consists of a two-element list,
containing the name of a scrollable widget followed by
either \fBxview\fR (for horizontal scrollbars)
or \fByview\fR (for vertical scrollbars).
.RE
.OP \-orient orient Orient
One of \fBhorizontal\fR or \fBvertical\fR.
Specifies the orientation of the scrollbar.
.SH "WIDGET COMMAND"
.PP
.TP
\fIpathName \fBcget\fR \fIoption\fR
Returns the current value of the specified \fIoption\fR; see \fIttk::widget(n)\fR.
.TP
\fIpathName \fBconfigure\fR ?\fIoption\fR? ?\fIvalue option value ...\fR?
Modify or query widget options; see \fIttk::widget(n)\fR.
.TP
\fIpathName \fBget\fR
Returns the scrollbar settings in the form of a list whose
elements are the arguments to the most recent \fBset\fR widget command.
.TP
\fIpathName \fBidentify\fR \fIx y\fR
Returns the name of the element at position \fIx\fR, \fIy\fR.
See \fIttk::widget(n)\fR.
.TP
\fIpathName \fBinstate \fIstatespec\fR ?\fIscript\fR?
Test the widget state; see \fIttk::widget(n)\fR.
.TP
\fIpathName \fBset\fR \fIfirst last\fR
This command is normally invoked by the scrollbar's associated widget 
from an \fB\-xscrollcommand\fR or \fB\-yscrollcommand\fR callback.
Specifies the visible range to be displayed.
\fIfirst\fR and \fIlast\fR are real fractions between 0 and 1.
.TP
\fIpathName \fBstate\fR ?\fIstateSpec\fR?
Modify or query the widget state; see \fIttk::widget(n)\fR.
.SH "INTERNAL COMMANDS"
.PP
The following widget commands are used internally
by the TScrollbar widget class bindings.
.TP
\fIpathName \fBdelta \fIdeltaX deltaY\fR
Returns a real number indicating the fractional change in
the scrollbar setting that corresponds to a given change
in thumb position.  For example, if the scrollbar is horizontal,
the result indicates how much the scrollbar setting must change
to move the thumb \fIdeltaX\fR pixels to the right (\fIdeltaY\fR is
ignored in this case).
If the scrollbar is vertical, the result indicates how much the
scrollbar setting must change to move the thumb \fIdeltaY\fR pixels
down.  The arguments and the result may be zero or negative.
.TP
\fIpathName \fBfraction \fIx y\fR
Returns a real number between 0 and 1 indicating where the point
given by \fIx\fR and \fIy\fR lies in the trough area of the scrollbar,
where 0.0 corresponds to the top or left of the trough
and 1.0 corresponds to the bottom or right.
\fIX\fR and \fIy\fR are pixel coordinates relative to the scrollbar
widget.
If \fIx\fR and \fIy\fR refer to a point outside the trough, the closest
point in the trough is used.
.SH "SCROLLING COMMANDS"
.PP
When the user interacts with the scrollbar, for example by dragging
the thumb, the scrollbar notifies the associated widget that it
must change its view.
The scrollbar makes the notification by evaluating a Tcl command
generated from the scrollbar's \fB\-command\fR option.
The command may take any of the following forms.
In each case, \fIprefix\fR is the contents of the
\fB\-command\fR option, which usually has a form like \fB.t yview\fR
.TP
\fIprefix \fBmoveto \fIfraction\fR
\fIFraction\fR is a real number between 0 and 1.
The widget should adjust its view so that the point given
by \fIfraction\fR appears at the beginning of the widget.
If \fIfraction\fR is 0 it refers to the beginning of the
document.  1.0 refers to the end of the document, 0.333
refers to a point one-third of the way through the document,
and so on.
.TP
\fIprefix \fBscroll \fInumber \fBunits\fR
The widget should adjust its view by \fInumber\fR units.
The units are defined in whatever way makes sense for the widget,
such as characters or lines in a text widget.
\fINumber\fR is either 1, which means one unit should scroll off
the top or left of the window, or \-1, which means that one unit
should scroll off the bottom or right of the window.
.TP
\fIprefix \fBscroll \fInumber \fBpages\fR
The widget should adjust its view by \fInumber\fR pages.
It is up to the widget to define the meaning of a page;  typically
it is slightly less than what fits in the window, so that there
is a slight overlap between the old and new views.
\fINumber\fR is either 1, which means the next page should
become visible, or \-1, which means that the previous page should
become visible.
.SH "WIDGET STATES"
.PP
The scrollbar automatically sets the \fBdisabled\fR state bit.
when the entire range is visible (range is 0.0 to 1.0),
and clears it otherwise.
It also sets the \fBactive\fR and \fBpressed\fR state flags
of individual elements, based on the position and state of the mouse pointer.
.SH EXAMPLE
.PP
.CS
set f [frame .f]
ttk::scrollbar $f.hsb \-orient horizontal \-command [list $f.t xview]
ttk::scrollbar $f.vsb \-orient vertical \-command [list $f.t yview]
text $f.t \-xscrollcommand [list $f.hsb set] \-yscrollcommand [list $f.vsb set] 
grid $f.t \-row 0 \-column 0 \-sticky nsew
grid $f.vsb \-row 0 \-column 1 \-sticky nsew
grid $f.hsb \-row 1 \-column 0 \-sticky nsew
grid columnconfigure $f 0 \-weight 1
grid rowconfigure $f 0 \-weight 1
.CE
.SH "SEE ALSO"
ttk::widget(n), scrollbar(n)
.SH KEYWORDS
scrollbar, widget
'\" Local Variables:
'\" mode: nroff
'\" End:
