styleUtil.tclScrollutil is a library package for Tcl/Tk versions 8.0 or higher, written in pure Tcl/Tk code. It contains:
scrollutil::addMouseWheelSupport,
    which creates mouse wheel event bindings for a given binding tag. 
    This command requires Tcl/Tk 8.4 or later;The scrollutil::scrollarea mega-widget greatly simplifies the
  creation of arbitrary scrolled widgets.  It consists of a scrollable
  widget and two scrollbars connected with that widget.  The display mode
  of each scrollbar can be static, dynamic, or
  none.  This scrolled window implementation also supports
  the widgets that are scrollable in one direction only (e.g., entry and
  ttk::entry) and respects the header component and title columns of tablelist widgets (this is freely
  configurable).
The scrollutil::scrollarea widget is similar to BWidget ScrolledWindow and its snit-based equivalent widget::scrolledwindow, contributed by Jeffrey Hobbs and contained in tklib. The snit-based scrodget package by Aldo Buratti and its TclOO-based equivalent scrolledwidget contributed by Johann Oberdorfer are further scrolled window implementations. However, full tablelist support is only provided by the scrollarea widget, which is free from external dependencies like BWidget, snit, or (for Tcl 8.5) TclOO. It is also free from the shimmering problem in connection with text widgets, which the above-mentioned scrolled window implementations either share with the autoscroll package (contained in tklib) or circumvent in a suboptimal way.
The scrollutil::scrollsync mega-widget is designed for scrolling
  several widgets simultaneously.  Whenever the horizontal/vertical
  position of the view in the window of one of its widgets changes, the view in
  the windows of all the other widgets is automatically adjusted accordingly,
  thus making sure that the view's position in these windows is kept in
  sync.  This mega-widget is horizontally and vertically scrollable, hence
  it can be embedded into a scrollutil::scrollarea widget via the latter's
  setwidget subcommand.
The scrollutil::scrollableframe mega-widget is a scrollable widget container. It contains a content frame, whose dimensions are typically larger than those of the widget itself. Arbitrary regions of this frame can be brought into view by scrolling, and the widget also provides a command for making individual widgets contained in the content frame visible in the scrollableframe window.
The scrollutil::scrollableframe widget is similar to BWidget
  ScrollableFrame and iwidgets::scrolledframe.  However, unlike these
  widgets, which use a canvas for scrolling the content frame, it adjusts the
  view with the aid of the place geometry manager, just
  like the scrolledframe::scrolledframe command of the
  Scrolledframe package by Maurice Bredelet (ulis) and its optimized and
  enhanced version contributed by Keith Nash.  For details on these
  commands see the wiki page
https://wiki.tcl-lang.org/page/A+scrolled+frame
Scrollutil's canvas-free approach is more lightweight and integrates better in applications that use tile widgets.
From the point of view of the commands related to mouse wheel event
  handling provided by the Scrollutil package, the scrollability of a
  widget or widget container window means that the associated Tcl command
  supports the  xview scroll number units 
  and  yview scroll number units 
  subcommands.  The reason for requiring at least Tk version 8.6b2 on
  Windows for the commands related to scrollable widget containers is that in
  earlier Tk versions on this platform the mouse wheel events were sent to the
  widget having the focus rather than to the one under the pointer.
To make use of the user-friendly mouse wheel event handling via the Scrollutil package, follow the steps below:
"all" or for the toplevel widgets (including ".")
    having scrollable widget containers, by invoking the scrollutil::createWheelEventBindings
    command.  In addition, register your scrollable widget containers for
    scrolling via these bindings with the aid of the scrollutil::enableScrollingByWheel
    command.  The above-mentioned bindings handle the mouse wheel events
    by scrolling the (innermost) registered scrollable widget container that is
    an ascendant of the widget under the pointer and is contained in the
    latter's toplevel.scrollutil::adaptWheelEventHandling
    command for those widgets contained in registered scrollable widget
    containers that have mouse wheel event (class) bindings.  This step
    eliminates the annoying and often dangerous double-handling effect, by
    modifying the mouse wheel event handling as follows:  If the focus is
    on the widget under the pointer then the mouse wheel events will be handled
    by the (class bindings of the) widget only, otherwise by the bindings
    created with the scrollutil::createWheelEventBindings
    command.  Without this step the mouse wheel events would scroll both
    the listbox, text, ttk::treeview, or tablelist widget under the pointer
    and the widget container to whose descendants the latter belongs, or
    they would select the next/previous value in the ttk::combobox or
    ttk::spinbox under the pointer in addition to scrolling the widget
    container."Date",
    "Time", "DateTime", "IPAddr", or
    "IPv6Addr" and the focus is on any of its siblings, then the
    mouse wheel events sent to this entry should be handled by the entry widget
    itself rather than scrolling the widget container that is an ascendant of
    the mentry.  The scrollutil::setFocusCheckWindow
    command covers exactly cases like this.The mouse wheel event handling with the aid of the Scrollutil package was
  also tested to work with the scrolledframe::scrolledframe
  command of the Scrolledframe package by Maurice Bredelet (ulis) and its
  optimized and enhanced version contributed by Keith Nash, as well as with the
  sframe command implemented by Paul Walton.  For details on
  these commands (which provide further implementations of scrollable widget
  containers) see the above-mentioned wiki page.
Scrollutil is available for free download from the Web page
https://www.nemethi.de
The distribution file is scrollutil1.5.tar.gz for UNIX and
  scrollutil1_5.zip for Windows.  These files contain the
  same information, except for the additional carriage return character
  preceding the linefeed at the end of each line in the text files for
  Windows.
Scrollutil is also included in tklib, which has the address
https://core.tcl.tk/tklib
Install the package as a subdirectory of one of the directories given by
  the auto_path variable.  For example, you can install it as
  a directory at the same level as the Tcl and Tk script libraries.  The
  locations of these library directories are given by the
  tcl_library and tk_library variables,
  respectively.
To install Scrollutil on UNIX, cd to the desired
  directory and unpack the distribution file
  scrollutil1.5.tar.gz:
gunzip -c scrollutil1.5.tar.gz | tar -xf -
On most UNIX systems this can be replaced with
tar -zxf scrollutil1.5.tar.gz
Both commands will create a directory named scrollutil1.5,
  with the subdirectories demos, doc, and
  scripts.
On Windows, use WinZip or some other program capable of unpacking
  the distribution file scrollutil1_5.zip into the directory
  scrollutil1.5, with the subdirectories demos,
  doc, and scripts.
Notice that in tklib the Scrollutil demos directory is
  replaced with the subdirectory scrollutil of the
  examples directory.  Please take this into account when
  reading the examples below.
The Scrollutil distribution provides two packages, called
  Scrollutil and Scrollutil_tile.  The main difference
  between the two is that Scrollutil_tile enables the tile-based,
  theme-specific appearance of scrollarea, scrollsync, and scrollableframe
  widgets; this package requires Tcl/Tk 8.4 or higher and tile 0.6 or
  higher.  It is not possible to use both packages in one and the same
  application, because both are implemented in the same scrollutil
  namespace and provide identical commands.
To be able to access the commands and variables defined in the package Scrollutil, your scripts must contain one of the lines
package require scrollutil ?version? package require Scrollutil ?version?
You can use either one of the two statements above because the file
  scrollutil.tcl contains both lines
package provide scrollutil ... package provide Scrollutil ...
Likewise, to be able to access the commands and variables defined in the package Scrollutil_tile, your scripts must contain one of the lines
package require scrollutil_tile ?version? package require Scrollutil_tile ?version?
Again, you can use either one of the two statements above because the file
  scrollutil_tile.tcl contains both lines
package provide scrollutil_tile ... package provide Scrollutil_tile ...
You are free to remove one of these two lines from
  scrollutil.tcl and scrollutil_tile.tcl,
  respectively, if you want to prevent the corresponding packages from making
  themselves known under two different names each.  Of course, by doing so
  you restrict the argument of  package require  to a
  single name.
Since the packages Scrollutil and Scrollutil_tile are implemented in the
  scrollutil namespace, you must either invoke the
namespace import scrollutil::pattern ?scrollutil::pattern ...?
command to import the procedures you need, or use qualified names
  like scrollutil::scrollarea.  In the examples below we have chosen the latter approach.
To access Scrollutil variables, you must use qualified
  names.  There are only three Scrollutil variables that are designed to
  be accessed outside the namespace scrollutil:
scrollutil::version holds the current version
    number of the Scrollutil package.scrollutil::library holds the location of the
    Scrollutil installation directory.scrollutil::usingTile has the value
    0 in the package Scrollutil and the value 1 in
    Scrollutil_tile.The Scrollutil_tile package checks whether the required Tk and tile versions are present, by executing the commands
    
package require Tk 8.4
if {$::tk_version < 8.5 || [regexp {^8\.5a[1-5]$} $::tk_patchLevel]} {
    package require tile 0.6
}
  
  The second command above reflects the fact that, beginning with Tk 8.5a6, tile is integrated into the Tk core and therefore it should only be loaded explicitly when using an earlier Tk version.
styleUtil.tclAll the examples in the demos directory use tile (ttk)
  widgets and contain the line
source styleUtil.tcl
The script styleUtil.tcl patches a few ttk widget styles and
  defines the style Small.Toolbutton.  In addition, on X11 it
  sets the theme to a slightly patched variant of the clam
  theme (having smaller ttk::button widgets as well as ttk::treeview and
  tablelist headers).
The patch for the style TCombobox makes sure that the
  (readonly) ttk::combobox widgets of the themes alt,
  clam, and default will show whether they have the
  focus.  This basic requirement, which makes the keyboard navigation more
  user-friendly, is already fulfilled by the themes vista,
  xpnative, and aqua.
The ttk::button widgets of the style Small.Toolbutton created
  by the procedure createToolbutton, implemented in this helper
  script, will appear raised when they have the focus.  Again, this makes
  the keyboard navigation more user-friendly.
This example shows how you can greatly simplify the creation of a scrolled tablelist by using a scrollarea widget.
The file ScrolledTablelist1.tcl in the demos
  directory creates a horizontally and vertically scrolled tablelist widget
  having two header rows and one title column, and manages the two scrollbars
  in such a way that the vertical scrollbar appears below the tablelist's
  header and the horizontal one starts to the right of the widget's title
  column area:
The script achieves these requirements using traditional scrollbar management, which is shown below in red color:
package require Tk 8.5 package require tablelist_tile 6.3 source styleUtil.tcl wm title . "Scrolled Tablelist" # # Create the tablelist and the scrollbars as children # of a frame having -borderwidth 1 and -relief sunken # set f [ttk::frame .f] set frm [ttk::frame $f.frm -borderwidth 1 -relief sunken] set tbl $frm.tbl set vsb $frm.vsb set hsb $frm.hsb tablelist::tablelist $tbl ... -borderwidth 0 \ -xscrollcommand [list $hsb set] -yscrollcommand [list $vsb set] . . . ttk::scrollbar $vsb -orient vertical -command [list $tbl yview] ttk::scrollbar $hsb -orient horizontal -command [list $tbl xview] . . . # # Manage the widgets within the frame # grid $tbl -row 0 -rowspan 2 -column 0 -columnspan 2 -sticky news if {[tk windowingsystem] eq "win32"} { grid $vsb -row 0 -rowspan 2 -column 2 -sticky ns } else { grid [$tbl cornerpath] -row 0 -column 2 -sticky ew grid $vsb -row 1 -column 2 -sticky ns } grid [$tbl cornerpath -sw] -row 2 -column 0 -sticky ns grid $hsb -row 2 -column 1 -sticky ew grid rowconfigure $frm 1 -weight 1 grid columnconfigure $frm 1 -weight 1 # # Manage the frame # pack $frm -expand yes -fill both -padx 10 -pady 10 pack $f -expand yes -fill both
The file ScrolledTablelist2.tcl in the demos
  directory replaces the rather technical code above with just a few lines
  (shown below in red color), by embedding the
  tablelist into a scrollarea widget.  It requires Tablelist version 6.5,
  which is needed so the -respectheader and -respecttitlecolumns
  scrollarea options can work as expected (for earlier Tablelist versions these
  options are silently ignored).  As a further benefit, the scrollbars
  created with this method will have the default display mode
  dynamic.
package require Tk 8.5 package require tablelist_tile 6.5 package require scrollutil_tile source styleUtil.tcl wm title . "Scrolled Tablelist" # # Create the tablelist within a scrollarea # set f [ttk::frame .f] set sa [scrollutil::scrollarea $f.sa] set tbl $sa.tbl tablelist::tablelist $tbl ... . . . $sa setwidget $tbl . . . # # Manage the scrollarea # pack $sa -expand yes -fill both -padx 10 -pady 10 pack $f -expand yes -fill both
The file ScrolledText.tcl in the demos directory
  shows how the scrollarea widget circumvents the
  potential shimmering effect in connection with text widgets.
Here is the relevant code, in which the lines related to the scrollarea widget are shown in red color:
package require scrollutil_tile source styleUtil.tcl wm title . "Scrolled Text" # # Create a text widget within a scrollarea # set f [ttk::frame .f] set sa [scrollutil::scrollarea $f.sa -lockinterval 10] set txt [text $sa.txt -font TkFixedFont -width 49 -height 12 \ -spacing1 2 -spacing3 2 -wrap none] $sa setwidget $txt # # Populate the text widget and set the background color of line #25 to red # for {set i 1} {$i <= 30} {incr i} { set j [expr {2*$i}] $txt insert end [string repeat x $j]\n } $txt delete 30.end $txt tag configure bgRed -background red $txt tag add bgRed 25.0 25.end . . . # # Manage the scrollarea # pack $sa -expand yes -fill both -padx 10 -pady 10 pack $f -expand yes -fill both # # Adjust the vertical view in the text window # so that line #25 becomes the bottom line # tkwait visibility $txt after 100 [list $txt yview 14.0]
The script creates a text widget $txt embedded into a
  scrollarea, populates it with 30 lines, and adjusts the vertical view in the
  text window so that line #25 becomes the bottom line.  This line has 50
  characters, hence it doesn't fit completely into the window, whose width is
  49 characters.  Consequently, the command  $txt
  xview  will return the list  {0.0 0.98}, 
  hence the scrollarea's horizontal scrollbar will be mapped and will obscure
  most part of the bottom line.  Since this line has red
  background, it is easy to see how much of it sticks out above the upper edge
  of the scrollbar.
Let's analyze what happens if the text widget's height is decreased by
  dragging the main window's upper or lower edge, just until the red pixels get
  obscured by the horizontal scrollbar.  After performing this action,
  line #25 is completely out of view and the new bottom line is line #24, which
  has 48 characters, hence the command  $txt xview  will
  return  {0.0 1.0}.  Normally, this would cause the
  horizontal scrollbar to be unmapped.  However, that would make line #25
  to the bottom line, thus causing the horizontal scrollbar to be mapped
  again.  This time the scrollbar would completely obscure this line,
  which would result in line #24 to become the bottom line, which would cause
  the scrollbar to be unmapped again, and so on.  In other words, the
  horizontal scrollbar would get mapped and unmapped in an endless loop, giving
  rise to an annoying flickering effect.  The built-in locking mechanism
  of the scrollarea widget guards against such potential endless loops. 
  To make sure that the locking will work as expected, we have set the
  -lockinterval
  scrollarea option to 10 (recall that the default value is
  1).
The file SyncListboxes.tcl in the demos
  directory creates two listboxes within a scrollsync widget, which in turn is embedded into a
  scrollarea.
Here is the relevant code, in which the lines related to the scrollarea and scrollsync widgets are shown in red color:
package require scrollutil_tile source styleUtil.tcl wm title . "European Countries" . . . set f [ttk::frame .f] . . . # # Create a scrollsync widget within a scrollarea # set sa [scrollutil::scrollarea $f.sa] set ss [scrollutil::scrollsync $sa.ss] $sa setwidget $ss # # Populate the scrollsync widget with two listboxes # . . . set lb1 [listbox $ss.lb1 -activestyle none -highlightthickness 0 -width 16] set lb2 [listbox $ss.lb2 -activestyle none -highlightthickness 0 -width 16] $ss setwidgets [list $lb1 $lb2] . . . grid $lb1 $lb2 -sticky news -padx {0 2} grid rowconfigure $ss 0 -weight 1 grid columnconfigure $ss 0 -weight 1 grid columnconfigure $ss 1 -weight 1 . . . pack $sa -side top -expand yes -fill both -padx 10 -pady {2 10} pack $f -expand yes -fill both . . .
The file SyncTablelists.tcl in the demos
  directory creates three tablelists within a scrollsync widget, which in turn is embedded into a
  scrollarea.
The relevant code is similar to the one shown in the previous example:
package require tablelist_tile package require scrollutil_tile source styleUtil.tcl wm title . "Synchronized Tablelists" . . . set f [ttk::frame .f] . . . # # Create a scrollsync widget within a scrollarea # set sa [scrollutil::scrollarea $f.sa] set ss [scrollutil::scrollsync $sa.ss] $sa setwidget $ss # # Populate the scrollsync widget with three tablelists # option add *Tablelist.stripeBackground #f0f0f0 for {set n 1; set colWidth 40} {$n <= 3} {incr n; incr colWidth 20} { set tbl [tablelist::tablelist $ss.tbl$n \ -columns [list 0 "Column 0" left $colWidth "Column 1" left]] set tbl$n $tbl for {set i 0} {$i < 40} {incr i} { $tbl insert end [list "cell $i,0" "cell $i,1"] } } $ss setwidgets [list $tbl1 $tbl2 $tbl3] grid $tbl1 $tbl2 $tbl3 -sticky news -padx {0 2} grid rowconfigure $ss 0 -weight 1 grid columnconfigure $ss 0 -weight 1 grid columnconfigure $ss 1 -weight 1 grid columnconfigure $ss 2 -weight 1 . . . pack $sa -side top -expand yes -fill both -padx 10 -pady {2 10} pack $f -expand yes -fill both . . .
Notice that column #1 of the three tablelist widgets is 40, 60, and 80 characters wide, respectively. For this reason, when scrolling horizontally to the right, the left table's view will reach its horizontal end position first, then that of the midde table, and as last one the view of the right table.
The file SuScrollableFrmDemo1.tcl in the demos
  directory creates a scrollutil::scrollableframe widget embedded into a
  scrollarea, creates mouse wheel event bindings
  for the binding tag "all" with the aid of the scrollutil::createWheelEventBindings
  command, and invokes the scrollutil::enableScrollingByWheel
  command for this scrollableframe, thus registering the latter for scrolling
  by these bindings.  After that it populates the content frame of the
  scrollableframe with ttk::label widgets displaying the names of the European
  countries, ttk::combobox widgets for selecting the corresponding capital
  cities, and ttk::button widgets of the style Small.Toolbutton
  (created by using the procedure createToolbutton, implemented in
  the file styleUtil.tcl) for the less
  patient users, displaying the text "Resolve".
Here is the relevant code:
package require scrollutil_tile source styleUtil.tcl wm title . "European Capitals Quiz" # # Create a scrollableframe within a scrollarea # set f [ttk::frame .f] set sa [scrollutil::scrollarea $f.sa] set sf [scrollutil::scrollableframe $sa.sf] $sa setwidget $sf # # Create mouse wheel event bindings for the binding tag "all" and # register the scrollableframe for scrolling by these bindings # scrollutil::createWheelEventBindings all scrollutil::enableScrollingByWheel $sf # # Get the content frame and populate it # set cf [$sf contentframe] set countryList { Albania Andorra Austria Belarus Belgium "Bosnia and Herzegovina" Bulgaria . . . } set capitalList { Tirana "Andorra la Vella" Vienna Minsk Brussels Sarajevo Sofia . . . } . . . set capitalList [lsort $capitalList] . . . set row 0 foreach country $countryList { . . . set w [ttk::combobox $cf.cb$row -state readonly -width 14 \ -values $capitalList] . . . # # Make the keyboard navigation more user-friendly # bind $w <<TraverseIn>> [list $sf see %W] # # Adapt the handling of the mouse wheel events for the ttk::combobox widget # scrollutil::adaptWheelEventHandling $w . . . incr row } . . .
We make the keyboard navigation more user-friendly with the aid of the
  see subcommand of the
  scrollableframe widget when handling the
  <<TraverseIn>> virtual event for the ttk::combobox
  and (not shown above) ttk::button widgets.  In addition, we invoke the
  scrollutil::adaptWheelEventHandling
  command for every ttk::combobox widget, which is needed for a user-friendly
  event handling, being that this widget has built-in bindings for the mouse
  wheel events.  Due to this command, the mouse wheel events over one of
  the ttk::combobox widgets will only select the next/previous capital city if
  the widget has the focus, otherwise they will scroll the scrollableframe.
With this script you can also test the scanning in the scrollableframe: If you press mouse button 1 over a free space of the scrollableframe window then the cursor will take on the shape of a pointing hand, and by draggging the mouse, the content frame will drag at high speed through the window, in the direction the mouse moves.
The file BwScrollableFrmDemo1.tcl in the demos
  directory creates a BWidget ScrollableFrame embedded into a scrollarea widget, creates mouse wheel event bindings
  for the binding tag "all" with the aid of the scrollutil::createWheelEventBindings
  command, and invokes the scrollutil::enableScrollingByWheel
  command for this ScrollableFrame, thus registering the latter for scrolling
  by these bindings.  After that it populates the content frame of the
  ScrollableFrame with the same widgets as
  SuScrollableFrmDemo1.tcl in the previous example.
Here is the relevant code:
package require BWidget Widget::theme yes package require scrollutil_tile source styleUtil.tcl wm title . "European Capitals Quiz" # # Create a ScrollableFrame within a scrollarea # set f [ttk::frame .f] set sa [scrollutil::scrollarea $f.sa] set sf [ScrollableFrame $sa.sf] $sa setwidget $sf . . . # # Create mouse wheel event bindings for the binding tag "all" and # register the ScrollableFrame for scrolling by these bindings # scrollutil::createWheelEventBindings all scrollutil::enableScrollingByWheel $sf # # Get the content frame and populate it # set cf [$sf getframe] set countryList { Albania Andorra Austria Belarus Belgium "Bosnia and Herzegovina" Bulgaria . . . } set capitalList { Tirana "Andorra la Vella" Vienna Minsk Brussels Sarajevo Sofia . . . } . . . set capitalList [lsort $capitalList] . . . set row 0 foreach country $countryList { . . . set w [ttk::combobox $cf.cb$row -state readonly -width 14 \ -values $capitalList] . . . # # Make the keyboard navigation more user-friendly # bind $w <<TraverseIn>> [list $sf see %W] # # Adapt the handling of the mouse wheel events for the ttk::combobox widget # scrollutil::adaptWheelEventHandling $w . . . incr row } . . .
The file ScrolledFrmDemo1.tcl in the demos
  directory creates an iwidgets::scrolledframe widget, creates mouse wheel
  event bindings for the binding tag "all" with the aid of the
  scrollutil::createWheelEventBindings
  command, and invokes the scrollutil::enableScrollingByWheel
  command for this scrolledframe, thus registering the latter for scrolling by
  these bindings.  After that it populates the content frame of the
  scrolledframe with the same widgets as SuScrollableFrmDemo1.tcl
  and BwScrollableFrmDemo1.tcl in the two previous examples.
Here is the relevant code:
    
if {[catch {package require iwidgets} result1] != 0 &&
    [catch {package require Iwidgets} result2] != 0} {
    error "$result1; $result2"
}
source scrolledwidgetPatch.itk                  ;# adds ttk::scrollbar widgets
package require scrollutil_tile
source styleUtil.tcl
wm title . "European Capitals Quiz"
. . .
#
# Create a scrolledframe
#
set f  [ttk::frame .f]
set sf [iwidgets::scrolledframe $f.sf -borderwidth 1 -relief sunken \
        -scrollmargin 0]
. . .
#
# Create mouse wheel event bindings for the binding tag "all"
# and register the scrolledframe for scrolling by these bindings
#
scrollutil::createWheelEventBindings all
scrollutil::enableScrollingByWheel $sf
#
# Get the content frame and populate it
#
set cf [$sf childsite]
. . .
<exactly as in the two previous examples, except the stuff related to keyboard navigation>
. . .
  
  The code related to keyboard navigation is not present in this example,
  because the iwidgets::scrolledframe widget doesn't provide a see
  subcommand.
The script SuScrollableFrmDemo2.tcl in the demos
  directory creates a scrollutil::scrollableframe widget embedded into a
  scrollarea and then sources the
  script SuScrollableFrmContent.tcl, which populates the content
  frame of the scrollableframe with the following widgets:
$txt within a scrollarea;$lb within a scrollarea;$cb;$sb;$e;$me of type "Date";$tbl within a scrollarea;$tv within a
    scrollarea.With the exception of ttk::label, ttk::entry, and ttk::separator, all these widgets have bult-in mouse wheel event bindings.
Here is the relevant code:
package require Tk 8.5.9 ;# for ttk::spinbox package require mentry_tile 3.2 ;# for mouse wheel support package require tablelist_tile 6.5 ;# for -(x|y)mousewheelwindow ;# and scrollutil::scrollarea package require scrollutil_tile source styleUtil.tcl wm title . "Scrollutil Demo" # # Create a scrollableframe within a scrollarea # set tf [ttk::frame .tf] set sa [scrollutil::scrollarea $tf.sa] set sf [scrollutil::scrollableframe $sa.sf] $sa setwidget $sf # # Get the content frame and populate it # set cf [$sf contentframe] source SuScrollableFrmContent.tcl # # Make the keyboard navigation more user-friendly # foreach w [list $cb $sb $e $me] { bind $w <<TraverseIn>> [list $sf see %W] } foreach w [list $txt $lb $tbl $tv] { bind $w <<TraverseIn>> [list seeScrollarea $sf %W] } proc seeScrollarea {sf w} { $sf see [scrollutil::getscrollarea $w] }
Whenever the <<TraverseIn>> virtual event is sent
  to one of the four widgets created within scrollareas, we query the path name
  of the corresponding scrollarea via scrollutil::getscrollarea and
  bring that scrollarea (including the scrollbars and the border) into view
  rather than just the widget in question.  While in this script we
  could have used  [winfo parent]  instead, the command
  scrollutil::getscrollarea is the recommended one, being that it
  works also for widgets that are no children of the corresponding
  scrollareas.
Here is the additional stuff related to the mouse wheel events, using the Scrollutil commands described in the What Is Scrollutil? section:
# # Create mouse wheel event bindings for the binding tag "all" and # register the scrollableframe for scrolling by these bindings # scrollutil::createWheelEventBindings all scrollutil::enableScrollingByWheel $sf # # Adapt the handling of the mouse wheel events for the text, listbox, # ttk::combobox, ttk::spinbox, tablelist, and ttk::treeview widgets, as # well as for the entry components of the mentry widget of type "Date" # set entryList [$me entries] scrollutil::adaptWheelEventHandling $txt $lb $cb $sb $tbl $tv {*}$entryList # # For the entry components of the mentry widget # set the "focus check window" to the mentry # scrollutil::setFocusCheckWindow {*}$entryList $me
Notice that we have passed, among others, the tablelist widget to the
  scrollutil::adaptWheelEventHandling
  command.  This will only work for Tablelist versions 6.4 and later,
  because the command handles tablelist widgets by setting their
  -xmousewheelwindow and -ymousewheelwindow options
  to the path name of the containing toplevel window, and these options were
  introduced in Tablelist version 6.4.  (For earlier Tablelist versions
  the command silently ignores any tablelist widget passed to it as
  argument.)
As already mentioned, in the file SuScrollableFrmContent.tcl
  the scrolled text, listbox, tablelist, and ttk::treeview widgets are created
  within scrollarea widgets:
set _sa [scrollutil::scrollarea ...] set txt [text $_sa.txt -font TkFixedFont -width 73] scrollutil::addMouseWheelSupport $txt $_sa setwidget $txt grid $_sa ... . . . set _sa [scrollutil::scrollarea ...] set lb [listbox $_sa.lb -width 0] $_sa setwidget $lb grid $_sa ... . . . set _sa [scrollutil::scrollarea ...] set tbl [tablelist::tablelist $_sa.tbl ...] . . . $_sa setwidget $tbl grid $_sa ... . . . set _sa [scrollutil::scrollarea ... -borderwidth 0] set tv [ttk::treeview $_sa.tv ...] . . . $_sa setwidget $tv grid $_sa ...
In the case of the text, listbox, and tablelist widgets we use scrollarea
  widgets with their default  -borderwidth 1 -relief
  sunken  settings, which will cause the setwidget subcommand of the associated
  Tcl commands to set the -borderwidth option of the text,
  listbox, and tablelist widgets to 0.  On the other hand,
  for the ttk::treeview we use a scrollarea widget with 
  -borderwidth 0,  because the ttk::treeview has a border of
  width 1 and doesn't support the -borderwidth
  configuration option.
For our text widget we prefer a mouse wheel event handling that scrolls
  the widget by lines rather than pixels, as done by the Text
  class bindings in Tk 8.5 and later; we achieve this by passing the path name
  $txt to the scrollutil::addMouseWeelSupport command.
The file SuScrollableFrmContent.tcl contains also the
  implementation of the procedure configTablelist, associated with
  the "Configure Tablelist Widget" button as the value of its
  -command option.  This procedure opens a toplevel window
  that contains a scrollutil::scrollableframe widget created
  with the  -fitcontentwidth yes 
  setting within a scrollarea and invokes the
  scrollutil::enableScrollingByWheel
  command for this scrollableframe, thus registering the latter for scrolling
  by the already created mouse wheel event bindings for the binding tag
  "all".  After that it populates the content frame of the
  scrollableframe with ttk::label, ttk::combobox, ttk::spinbox, ttk::entry, and
  ttk::checkbutton widgets used to display and edit the configuration options
  of the tablelist widget.  The procedure handles the
  <<TraverseIn>> virtual event sent to one of these
  widgets with the aid of the scrollableframe's see subcommand.  Whenever a
  ttk::combobox or ttk::spinbox is created, the scrollutil::adaptWheelEventHandling
  command is invoked for it, being that these widgets have built-in bindings
  for the mouse wheel events.
The widgets populating the content frame are managed using
  grid.  In case of the ttk::entry widgets we invoke
  grid with  -sticky we.  Due to this and
  the  -fitcontentwidth yes  scrollableframe setting,
  the ttk::entry widgets will stretch or shrink whenever the width of the
  scrollableframe changes as a result of resizing the toplevel window.
The script BwScrollableFrmDemo2.tcl in the demos
  directory creates a BWidget ScrollableFrame embedded into a scrollarea widget and then sources the
  script BwScrollableFrmContent.tcl, which populates the content
  frame of the ScrollableFrame with the same widgets as
  SuScrollableFrmContent.tcl in the previous example.
Here is the relevant code:
package require Tk 8.5.9 ;# for ttk::spinbox package require BWidget Widget::theme yes package require mentry_tile 3.2 ;# for mouse wheel support package require tablelist_tile 6.5 ;# for -(x|y)mousewheelwindow ;# and scrollutil::scrollarea package require scrollutil_tile source styleUtil.tcl wm title . "Scrollutil Demo" # # Create a ScrollableFrame within a scrollarea # set tf [ttk::frame .tf] set sa [scrollutil::scrollarea $tf.sa] set sf [ScrollableFrame $sa.sf] $sa setwidget $sf . . . # # Get the content frame and populate it # set cf [$sf getframe] source BwScrollableFrmContent.tcl # # Make the keyboard navigation more user-friendly # foreach w [list $cb $sb $e $me] { bind $w <<TraverseIn>> [list $sf see %W] } foreach w [list $txt $lb $tbl $tv] { bind $w <<TraverseIn>> [list seeScrollarea $sf %W] } proc seeScrollarea {sf w} { $sf see [scrollutil::getscrollarea $w] }
The additional stuff related to the mouse wheel events contains exactly the same Scrollutil command invocations as the one in the previous example.
The file BwScrollableFrmContent.tcl contains also the
  implementation of the procedure configTablelist, associated with
  the "Configure Tablelist Widget" button as the value of its
  -command option.  This procedure opens a toplevel window
  that contains a BWidget ScrollableFrame created with the 
  -constrainedwidth yes  setting within a scrollarea widget and invokes the scrollutil::enableScrollingByWheel
  command for this ScrollableFrame, thus registering the latter for scrolling
  by the already created mouse wheel event bindings for the binding tag
  "all".  After that it populates the content frame of the
  ScrollableFrame with ttk::label, ttk::combobox, ttk::spinbox, ttk::entry, and
  ttk::checkbutton widgets used to display and edit the configuration options
  of the tablelist widget.  The procedure handles the
  <<TraverseIn>> virtual event sent to one of these
  widgets with the aid of the ScrollableFrame's see
  subcommand.  Whenever a ttk::combobox or ttk::spinbox is created, the
  scrollutil::adaptWheelEventHandling
  command is invoked for it, being that these widgets have built-in bindings
  for the mouse wheel events.
Again, all this is nearly identical to what we did in the previous example.
The script ScrolledFrmDemo2.tcl in the demos
  directory creates an iwidgets::scrolledframe widget and then
  sources the file ScrolledFrmContent.tcl, which
  populates the content frame of the scrolledframe with the same widgets as
  SuScrollableFrmContent.tcl and
  BwScrollableFrmContent.tcl in the two previous examples.
Here is the relevant code:
package require Tk 8.5.9 ;# for ttk::spinbox if {[catch {package require iwidgets} result1] != 0 && [catch {package require Iwidgets} result2] != 0} { error "$result1; $result2" } source scrolledwidgetPatch.itk ;# adds ttk::scrollbar widgets package require mentry_tile 3.2 ;# for mouse wheel support package require tablelist_tile 6.5 ;# for -(x|y)mousewheelwindow ;# and scrollutil::scrollarea package require scrollutil_tile source styleUtil.tcl wm title . "Scrollutil Demo" . . . # # Create a scrolledframe # set tf [ttk::frame .tf] set sf [iwidgets::scrolledframe $tf.sf -borderwidth 1 -relief sunken \ -scrollmargin 0] . . . # # Get the content frame and populate it # set cf [$sf childsite] . . . source ScrolledFrmContent.tcl
The additional stuff related to the mouse wheel events contains exactly the same Scrollutil command invocations as the one in the two previous examples.
The file ScrolledFrmContent.tcl contains also the
  implementation of the procedure configTablelist, associated with
  the "Configure Tablelist Widget" button as the value of its
  -command option.  This procedure opens a toplevel window
  that contains an iwidgets::scrolledframe widget with a manually implemented
  equivalent of the  -fitcontentwidth yes 
  scrollutil::scrollableframe and 
  -constrainedwidth yes  BWidget ScrollableFrame settings and
  invokes the scrollutil::enableScrollingByWheel
  command for this scrolledframe, thus registering the latter for scrolling by
  the already created mouse wheel event bindings for the binding tag
  "all".  After that it populates the content frame of the
  scrolledframe with ttk::label, ttk::combobox, ttk::spinbox, ttk::entry, and
  ttk::checkbutton widgets used to display and edit the configuration options
  of the tablelist widget.  Whenever a ttk::combobox or ttk::spinbox is
  created, the scrollutil::adaptWheelEventHandling
  command is invoked for it, being that these widgets have built-in bindings
  for the mouse wheel events.
Again, all this is nearly identical to what we did in the two previous examples.