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+'\"
+'\" SOURCE: tk/doc/scrollbar.n, r1.4
+'\"
+'\" Copyright (c) 1990-1994 The Regents of the University of California.
+'\" 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.
+'\" 
+'\" $Id: ttk_scrollbar.n,v 1.1 2006/10/31 01:42:25 hobbs Exp $
+'\" 
+.so man.macros
+.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?
+.SO
+\-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\fP below,
+whenever the user requests a view change by manipulating the scrollbar.
+.br
+This option typically consists of a two-element list,
+containing the name of a scrollable widget followed by
+either \fBxview\fP (for horizontal scrollbars)
+or \fByview\fP (for vertical scrollbars).
+.OP \-orient orient Orient
+One of \fBhorizontal\fP or \fBvertical\fP.
+Specifies the orientation of the scrollbar.
+.BE
+
+.SH DESCRIPTION
+Scrollbar 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.
+.SH "WIDGET COMMAND"
+.TP
+\fIpathName \fBcget\fR \fIoption\fR
+Returns the current value of the specified \fIoption\fP; see \fIwidget(n)\fP.
+.TP
+\fIpathName \fBconfigure\fR ?\fIoption\fR? ?\fIvalue option value ...\fR?
+Modify or query widget options; see \fIwidget(n)\fP.
+.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 \fBinstate \fIstatespec\fR ?\fIscript\fR?
+Test the widget state; see \fIwidget(n)\fP.
+.TP
+\fIpathName \fBset\fR \fIfirst last\fR
+This command is normally invoked by the scrollbar's associated widget 
+from an \fB-xscrollcommand\fP or \fB-yscrollcommand\fP 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 \fIwidget(n)\fP.
+.SH "INTERNAL COMMANDS"
+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.
+.TP
+\fIpathName \fBidentify\fR \fIx y\fR
+Returns the name of the element under the point given 
+by \fIx\fR and \fIy\fR, or an empty string if the point does
+not lie in any element of the scrollbar.
+\fIX\fR and \fIy\fR are pixel coordinates relative to the scrollbar widget.
+.SH "SCROLLING COMMANDS"
+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"
+The scrollbar automatically sets the \fBdisabled\fP state bit.
+when the entire range is visible (range is 0.0 to 1.0),
+and clears it otherwise.
+It also sets the \fBactive\fP and \fBpressed\fP state flags
+of individual elements, based on the position and state of the mouse pointer.
+.SH EXAMPLE
+.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 KEYWORDS
+scrollbar, widget