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# Tk::JBrowseEntry is an enhanced version of the Tk::BrowseEntry widget.
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=head1 NAME
Tk::JBrowseEntry - Full-featured "Combo-box" (Text-entry combined with drop-down listbox) 
derived from Tk::BrowseEntry with many additional features and options.
=head1 SYNOPSIS
        use Tk;
        use Tk::JBrowseEntry;
        my $mw = MainWindow->new;
        my $var;
        my $widget = $mw->JBrowseEntry(
                -label => 'Normal:',
                -variable => \$var,
                -state => 'normal',
                -choices => [qw(pigs cows foxes goats)],
                -width  => 12
        )->pack(
                -side   => 'top',
                -pady => '10',
                -anchor => 'w');
        MainLoop;
=head1 DESCRIPTION
Tk::JBrowseEntry is a derived widget from Tk::BrowseEntry, but adds numerous 
features and options.  Among them are hash lists (one set of values is displayed 
for the user, but another is used as data), ability to disable either the text 
entry widget or the listbox, ability to allow user to delete items from the list, 
additional keyboard bindings, and much more.
JBrowseEntry widgets allow one to specify a full combo-box, a "readonly" 
box (text field allows user to type the 1st letter of an item to search for, 
but user may only ultimately select one of the items in the list); a "textonly" 
version (drop-down list and list pattern-matching disabled); a "text" version 
(drop-down list disabled), but the up, down, and right arrows will still do 
text-completion by matching against the choices in the list; or a completely 
disabled widget.
This widget is similar to other combo-boxes, ie.        JComboBox, but has better 
keyboard bindings and allows for quick lookup/search within the listbox. 
pressing <RETURN> in entry field displays the drop-down box with the 
first entry most closly matching whatever's in the entry field highlighted. 
Pressing <RETURN> or <SPACE> in the listbox 
selects the highlighted entry and copies it to the text field and removes the 
listbox.  <ESC> removes the listbox from view.  
<UP> and <DOWN> arrows work the listbox as well as pressing a key, which will 
move the highlight to the next item starting with that letter/number, etc. 
<UP> and <DOWN> arrows pressed within the entry field circle through the 
various list options as well (unless "-state" is set to 'textonly').  
Set "-state" to "text" to disable the drop-down list, but allow <UP> and 
<DOWN> to cycle among the choices.  Setting "-state" to 'textonly' completely 
hides the choices list from the user - he must type in his choice just like 
a normal entry widget.
One may also specify whether or not the button which activates the 
drop-down list via the mouse can take focus or not (-btntakesfocus) or 
whether the widget itself can take focus or is skipped in the focusing 
order.  The developer can also specify alternate bitmap images for the 
button (-arrowimage and / or -farrowimage).  The developer can also specify the 
maximum length of the drop-down list such that if more than that number of 
items is added, a vertical scrollbar is automatically added (-height).  
A fixed width in characters (-width) can be specified, or the widget can be 
allowed to resize itself to the width of the longest string in the list.  The 
listbox and text entry field are automatically kept to the same width.
One can optionally specify a label (-label), similar to the "LabEntry" widget.  
By default, the label appears packed to the left of the widget.  The 
positioning can be specified via the "-labelPack" option.  For example, to 
position the label above the widget, use "-labelPack => [-side => 'top']".
=head1 EXAMPLES
 It is easiest to illustrate this widget's capabilities via examples:
  
 use Tk;
 use Tk::JBrowseEntry;
  
 $MainWin = MainWindow->new;
  
 #SET UP SOME DEFAULT VALUES.
  
 $dbname1 = 'cows';
 $dbname2 = 'foxes';
 $dbname3 = 'goats';
 $dbname5 = 'default';
  
 #HERE'S A NORMAL COMBO-BOX.
  
 $jb1 = $MainWin->JBrowseEntry(
        -label => 'Normal:',
        -variable => \$dbname1,
        -state => 'normal',
        -choices => [qw(pigs cows foxes goats)],
        -width  => 12);
 $jb1->pack(
        -side   => 'top', -pady => '10', -anchor => 'w');
  
 #THIS ONE HAS THE DROP-DOWN LIST DISABLED.
  
 $jb2 = $MainWin->JBrowseEntry(
        -label => 'TextOnly:',
        -variable => \$dbname2,
        -state => 'text',
        -choices => [qw(pigs cows foxes goats)],
        -width  => 12);
 $jb2->pack(
        -side   => 'top', -pady => '10', -anchor => 'w');
  
 #THIS ONE'S "READONLY" (USER MUST PICK FROM THE LIST, TEXT BOX ALLOWS QUICK 
 #SEARCH.
  
 $jb3 = $MainWin->JBrowseEntry(
        -label => 'ReadOnly:',
        -variable => \$dbname3,
        -choices => [qw(pigs cows foxes goats)],
        -state => 'readonly',
        -width  => 12);
 $jb3->pack(
        -side   => 'top', -pady => '10', -anchor => 'w');
  
 #THIS ONE'S COMPLETELY DISABLED!
  
 $jb4 = $MainWin->JBrowseEntry(
        -label => 'Disabled:',
        -variable => \$dbname3,
        -state => 'disabled',
        -choices => [qw(pigs cows foxes goats)],
        -width  => 12);
 $jb4->pack(
        -side   => 'top', -pady => '10', -anchor => 'w');
  
 #HERE'S ONE WITH A SCROLLBAR (NOTE THE "-height" ATTRIBUTE).
  
 $jb5 = $MainWin->JBrowseEntry(
        -label => 'Scrolled List:',
        -width => 12,
        -default => $dbname5,
        -height => 4,
        -variable => \$dbname5,
        -browsecmd => sub {print "-browsecmd!\n";},
        -listcmd => sub {print "-listcmd!\n";},
        -state => 'normal',
        -choices => [qw(pigs cows foxes goats horses sheep dogs cats ardvarks default)]);
 $jb5->pack(
        -side   => 'top', -pady => '10', -anchor => 'w');
  
 #HERE'S ONE THAT THE BUTTON TAKES KEYBOARD FOCUS.
  
 $jb6 = $MainWin->JBrowseEntry(
        -label => 'Button Focus:',
        -btntakesfocus => 1,
        -arrowimage => $MainWin->Getimage('balArrow'),   #SPECIFY A DIFFERENT BUTTON IMAGE.
        -farrowimage => $MainWin->Getimage('cbxarrow'),  #OPTIONAL 2ND IMAGE FOR BUTTON WHEN FOCUSED. 
        -width => 12,
        -height => 4,
        -variable => \$dbname6,
        -browsecmd => sub {print "-browsecmd!\n";},
        -listcmd => sub {print "-listcmd!\n";},
        -state => 'normal',
        -choices => [qw(pigs cows foxes goats horses sheep dogs cats ardvarks default)]);
 $jb6->pack(
        -side   => 'top', -pady => '10', -anchor => 'w');
  
 #HERE'S ONE THAT DOWS NOT TAKE KEYBOARD FOCUS.
  
 $jb7 = $MainWin->JBrowseEntry(
        -label => 'Skip Focus:',
        -takefocus => 0,
        -width => 12,
        -height => 4,
        -variable => \$dbname7,
        -browsecmd => sub {print "-browsecmd!\n";},
        -listcmd => sub {print "-listcmd!\n";},
        -state => 'normal',
        -choices => [qw(pigs cows foxes goats horses sheep dogs cats ardvarks default)]);
 $jb7->pack(
        -side   => 'top', -pady => '10', -anchor => 'w');
  
 $jb7->choices([qw(First Second Fifth Sixth)]);   #REPLACE LIST CHOICES!
 $jb7->insert(2, 'Third', 'Fourth');              #ADD MORE AFTER 1ST 2.
 $jb7->insert('end', [qw(Seventh Oops Eighth)]);  #ADD STILL MORE AT END.
 $jb7->delete(7);                                 #REMOVE ONE.
  
 $b = $MainWin->Button(-text => 'Quit', -command => sub {exit(); });
 $b->pack(-side => 'top');
 $jb1->focus;   #PICK ONE TO START WITH KEYBOARD FOCUS.
  
 MainLoop;
=head1 SEE ALSO
L<Tk::JComboBox> L<Tk::BrowseEntry> L<Tk::Listbox> L<Tk::Entry>
=head1 WIDGET-SPECIFIC OPTIONS
=over 4
=item B<-state> => I<normal | readonly | text | textonly | disabled>
Default: B<normal>
JBrowseEntry supports 5 different states:
=over 4
I<normal>:  Default operation -- Both text entry field and drop-down list button function normally. 
I<readonly>:  Drop-down list functions normally. When text entry field has focus, user may type in a letter, and the drop-down list immediately drops down and the first/ next matching item becomes highlighted. The user must ultimately select from the list of valid entries and may not enter anything else.
I<text>:  Text entry functions normally, but drop-down list button is disabled. User must type in an entry or use the up and down arrows to choose from among the list items.
I<textonly>:  Similar to "text": Text entry functions normally, but drop-down list button is disabled. User must type in an entry. The list choices are completely hidden from the user.
I<disabled>:  Widget is completely disabled and greyed out. It will not activate or take focus.
=back
=item B<-altbinding>
Allows one to specify alternate binding schema for certain keys.  Each binding pair may be separated by 
a comma, semicolon, colon, space, or virtical bar.  Case is insensitive.  Currently valid values are:
"Return=Go" - causes [Return] key to roll up the drop-down list and invoke the I<-browsecmd> callback, if any.
"Return=NonEmptyGo" - same as "Return=Go" if the text field is non-empty, otherwises pops up the drop-down list.
"Return=SingleGo" - same as "Return=Go" if there are no choices in the drop-down list (instead of popping up the drop-down list). 
"Return=Next" - causes pressing the [Return] key to advance the focus to the next widget in the main window.
"Right=NoSearch" - Do not complete the text in the text field with the next matching value found in the 
choices list when the [Right-arrow] key is pressed in the entry field, rather leave it unchanged.
"Down=Popup" - causes the [Down-arrow] key pressed in the entry field to pop up the selection listbox.  
Useful particularly if the [arrow-button] isn't displayed, ie. (I<-nobutton> => 1) and/or the [Return] 
key is bound with an I<-altbinding>, etc. to do something other than pop up the drop-down list.
"Nolistbox=actions" - causes certain I<actions> to NOT invoke the I<-browsecmd> callback when activated 
within the listbox widget, ie. "Nolistbox=listbox.space" means don't invoke I<-browsecmd> callback if 
<spacebar> pressed in the listbox.  Valid values are ([listbox.]{space|return|button1|*button1|mod[.{shift|Control|alt|*}-]button1}:  "space,button1,return,mod.Shift-button1,mod.Control-button1,mod.Alt-button1,mod,*button1", etc.  Multiple values can be separated by commas.  "mod" means any modifier (Shift|Control|Alt), "*button1" means button1 regardless of modifier.
"Tab=PopList" - Normally, if the [Tab] key is pressed while the drop-down list is displayed, the focus simply returns to the text entry field and the listbox remains displayed.  Modern combo-boxes generally don't do this and many users don't expect it.  Specifying "Tab=PopList" makes Tk::JBrowseEntry behave like most modern combo-boxes by simply undisplaying the drop-down list and restoring focus to the text entry field.  Either way, the listbox is undisplayed anyway when the JBrowseEntry widget itself goes out of focus, or either the [Enter] or [Esc] key is pressed.
"Down=None", "Up=None", "Right=None", "Esc=None", "Return=None", "Space=None" - causes pressing that 
respective key to NOT perform it's default binding action.  User can still add their own bindings 
within their calling program though.
=item B<-arrowimage>
Allows one to specify an image for the the button which activates the drop-down list when the button has the keyboard focus. The default is: $MainWin->Getimage('cbxarrow') on Linux and a custom bitmap on M$-Windows.  Also see the "-farrowimage" option below, as well as the "-arrowimage" option under Standard BrowseEntry options for more details.  On Linux, this is used regardless of the focus status of the button, which is indicated by the border, unless a "-farrowimage" image is specified.  On M$-Windows, a separate custom bitmap is provided for the focused version, since Windows does not change the border color when the button takes focus.
=item B<-browse>
Adds several additional triggering events which invoke the B<-browsecmd> callback:  entry.tab, frame.tab, and key.<character-typed>, if set to 1.  Default is 0.  This likely is rarely needed in practice, but allows the calling program to know whenever a key is typed into the entry field or if the field is tabbed away from.  The one case the author uses this option on is the "drive-letter" field in the M$-Windows version of his Tk::JFileDialog widget.
=item B<-browsecmd>
Specifies a callback function to call when a selection is made in the popped up listbox. It is passed the widget and the text of the entry selected. This function is called after the entry variable has been assigned the value, (so the programmer can validate and override the user's entry if desired).
The function is passed the widget reference itself (self), the content of the entry field (not necessarily equal to the B<-variable> reference value), and the triggering "event" as described below.  
Specific cases (events) where it is invoked:  entry.[-mod.{Shift|Control|Alt}]return[.{go|browse}], listbox.return, listbox.space, or listbox.[-mod.{Shift|Control|Alt}]button1.  If B<-browse> is set to 1, then additional triggering events are:  entry.tab, frame.tab, and key.<character-typed>.
=item B<-btntakesfocus>
The drop-down list button is normally activated with the mouse and is skipped in the focusing circuit. If this option is set, then the button will take keyboard focus. Pressing <Return>, <Spacebar>, or <Downarrow> will cause the list to be dropped down, repeating causes the list to be removed again. Normally, the text entry widget receives the keyboard focus. This option can be used in combination with "-takefocus" so that either the text entry widget, the button, or both or neither receive keyboard focus. If both options are set, the entry field first receives focus, then pressing <Tab> causes the button to be focused. 
=item B<-deleteitemsok>
If set, allows user to delete individual items in the drop-down list by pressing the <Delete> key to delete the current (active) item.  No effect if the state is "text" or "textonly".
=item B<-deletecmd>
(ADDED v4.9): Specifies a callback function to call when the user deletes an entry (if B<-deleteitemsok> is set to true) in the popped up listbox. It is passed the widget and either the index of the entry being deleted OR -1. This function is called BOTH before AND after the entry is deleted.  The entry parameter is -1 on the second call, and the first call if $_[1] (the index to be deleted) >= 0, the function should return false/undef to permit the delete or true to SUPPRESS the delete (in which case, the callback will NOT be called a second time)!  No effect if the state is "text" or "textonly".
=item B<-farrowimage>
Allows one to specify a second, alternate bitmap for the image on the button which activates the drop-down list when the button has the keyboard focus. The default is to use the "-arrowimage" image, EXCEPT in M$-Windows, in which case, the default remains the default "focused" bitmap, since Windows does not use a focus border, but rather, the image itself must change to indicate focus status.  See the "-arrowimage" option under Standard BrowseEntry options for more details. 
The default image for Linux is:  $MainWin->Getimage('cbxarrow') and a custom bitmap for M$-Windows.
=item B<-labelPack>
Specify alternate packing options for the label. The default is: "[-side => 'left', -anchor => 'e']". The argument is an arrayref. Note: if no label is specified, none is packed or displayed. 
=item B<-labelrelief>
Default B<"flat">
Allow relief of the label portion of the widget to be specified.
=item B<-listcmd>
Specifies a callback function to call when the button next to the entry is pressed to popup the choices in the listbox. This is called before popping up the listbox, so can be used to populate the entries in the listbox. 
=item B<-listfont>
Specify an alternate font for the text in the listbox. Use "-font" to change the text of the text entry field. For best results, "-font" and "-listfont" should specify fonts of similar size. 
=item B<-listrelief>
Specifies relief for the drop-down list (default is "sunken"). 
=item B<-listwidth>
Specifies the width of the popup listbox. 
=item B<-nobutton>
Default B<0> (display the button)  NOTE:  Regardless of setting, the button is not displayed if the state 
is "text" or "textonly".
Prevents drop-down list button from being displayed if set to 1 (true).
=item B<-noselecttext>
Normally, when the widget has the focus and is set by listbox selection, the text will then be "selected" (highlighted and in the cut-buffer). Some consider this annoying.  Setting this option will cause the text to not be selected.  The user can still select the text themself, ie. for pasting somewhere else.
=item B<-tabcomplete>
If set to "1", pressing the "<Tab>" key will cause the string in the entry field to be "auto-completed" to the next matching item in the list. If there is no match, the typed text is not changed. If it already matches a list item, then the listbox is removed from view and keyboard focus transfers to the next widget. If set to "2" and there is no match in the list, then entry is set to the default value or empty string.  If set to "0", focus is simply advanced to the next widget in the main window.
=back
=head1 INHERITED OPTIONS
=over 4
=item B<-choices>
Specifies the list of initial choices to pop up.  This is a reference to an array or hash of strings specifying the choices.  If a I<hashref> is specified, the keys represent the actual data values 
and the values represent the corresponding values the user sees displayed in the 
listbox.  NOTE:  If a I<hashref> is specified, the B<-variable> should be initialized 
to one of the hash VALUES rather than it's corresponding key.
=item B<-colorstate>
Depreciated -- Appears to force the background of the entry widget on the Unix version to "grey95" if state is normal and a "-background" color is not specified. 
=item B<-height>
Specify the maximum number of items to be displayed in the listbox before a vertical scrollbar is automatically added. Default is infinity (listbox will not be given a scrollbar regardless of the number of items added). 
=item B<-maxwidth>
Specifies the maximum width the entry and listbox widgets can expand to in characters. The default is zero, meaning expand to the width to accomodate the widest string in the list. 
=item B<-variable>
Specifies a scalar reference to the variable in which the entered value is to be stored/retrieved (tied). 
=item B<-width>
The number of characters (average if proportional font used) wide to make the entry field. The drop-down list will be set the same width as the entry widget plus the width of the button. If not specified, the default is to calculate the width to the width of the longest item in the choices list and if items are later added or removed the width will be recalculated. 
=back
=head1 WIDGET METHODS
=over 4
=item $widget->B<activate>(index)
activate() invokes the activate() option on the listbox to make the item with the 
index specified by the first argument "active".  Unless a second argument is 
passed containing a false value, the value of the "-textvariable" variable is also 
set to this now active value.
=item $widget->B<choices>([listref])
Sets the drop-down list listbox to the list of values referenced by I<listref>, if
specified.  Returns the current list of choices in the listbox if no arguments 
provided.  If a I<hashref> is specified, the keys represent the actual data values 
and the values represent the corresponding values the user sees displayed in the 
listbox.  NOTE:  If a I<hashref> is specified, the B<-variable> should be initialized 
to one of the hash VALUES rather than it's corresponding key.
=item $widget->B<curselection>()
Returns the currently-selected element in the listbox, if any, otherwise, B<undef>.
=item $widget->B<delete>(first [, last])
Deletes one or more elements of the listbox.  First and last are indices specifying 
the first and last elements in the range to delete.  If last isn't specified it 
defaults to first, i.e. a single element is deleted.
=item $widget->B<delete_byvalue>(hashkey)
Deletes one or more elements of the listbox.  "hashkey" specifies the element to 
be deleted by the value visible to the user.
=item $widget->B<reference>(hashkey)
Returns the value (displayed in the listbox) that corresponds to the choice key 
specified by "hashkey".  If the key is not one of the valid choices or the choices 
are a list instead of a hash, then the hashkey itself is returned.  If the choices are 
a list rather than a hash, then the value is returned as is.  Returns B<undef> on error. 
=item $widget->B<dereference>(hashvalue)
Returns the actual option key value that corresponds to the choice value displayed 
in the listbox.  (undef if there is none).  (Opposite of reference() and 
referenceOnly().  Use this function on the -variable reference variable to get 
the actual data (hash key), since the reference variable will contain the VALUE 
displayed to the user!  If the choices are a list rather than a hash, then the 
value is returned as is.  Returns B<undef> on error. 
=item $widget->B<dereferenceOnly>(hashkey)
Returns 1 if the key specified by "hashkey" is one of the valid choices and the list 
of choices is a hash, otherwise B<undef> is returned.
=item $widget->B<get_hashref_byname>()
Returns a reference to the current hash of choices (keyed by the option visable to
the user) if the choice list is a hash (reversed from the hash passed to choices()), 
otherwise, B<undef> is returned.
=item $widget->B<get_hashref_byvalue>()
Returns a reference to the current hash of choices (keyed by actual option value) 
if the choice list is a hash (same as the hash passed to choices()), 
otherwise, B<undef> is returned.
=item $widget->B<get>([first [, last])
get() with no arguments returns the current value of the "-textvariable" variable.  
If any arguments are passed, they are passed directly to the listbox->get() 
function, ie. "0", "end" to return all values of the listbox.  For choice hashes, 
the value returned is what is displayed to the user.  The arguments are indices.
=item $widget->B<get_icursor>(index)
Return the location of I<index> in the I<text-entry> field.  Values known to be 
valid are:  "insert" and "end", which return the character position of the insertion 
cursor and the location of the "end" of the current input string (ie. it's length).  
The cursor is set by the $widget->B<icursor> function.
=item $widget->B<get_index>(value)
Returns the index number in the list (zero-based) that can be used by get() of 
the value specified by "value", or undef if "value" is not in the list of choices.  
If the choice list is a hash, then "value" should be the value displayed (stored 
in the -variable reference variable), not the hash key.  This function is the 
reverse of the B<get>() function.
=item $widget->B<hasreference>(hashkey)
Returns the value (displayed in the listbox) that corresponds to the choice key 
specified by "hashkey".  If the key is not one of the valid choices or the choices 
are a list instead of a hash, then B<undef> is returned.
=item $widget->B<icursor>(index)
Sets the location of the text-entry field's text cursor to I<index>.  Valid values 
are numeric (zero for beginning) and "end" for placing the cursor at the end of the 
text.  The index can be retrieved by using the $widget->B<get_icursor>(index) function.
=item $widget->B<index>(index)
Invokes and returns the result of the listbox->index() function.
=item $widget->B<insert>(index, [item | list | listref | hashref])
Inserts one or more elements in the list just before the element given by index.  
If I<index> is specified as "end" then the new elements are added to the end of the list.
List can be a reference to a list (I<listref>).  If a hash reference is specified, 
then the values are displayed to the user in the drop-down list, but the values 
returned by the "-textvariable" variable or the get() function are the corresponding 
hash key(s).
=item $widget->B<selectionRange>(index1, index2)
Select (highlight) the text in the text-entry field between I<index1> and I<index2>.
Valid values are numeric (zero for beginning), "insert" and "end".
=item $widget->B<size>()
Invokes and returns the result of the listbox size() function (the number of items in 
the list).
=item $widget->B<state>([normal | readonly | text | textonly | disabled])
Get or set the state of the widget.
=item $widget->B<Popdown>([nofocusrestore])
Roll up (undisplay) the drop-down list.  If I<nofocusrestore> is specified and is true, no 
attempt will be made to refocus the previous widget focused when the drop-down list was 
popped up.  This is useful when the developer intends to immediately focus somewhere 
else.
=item $widget->B<PressButton>()
Activates drop-down list as if user pressed the button (unless state is "text" or "textonly" 
or "disabled".  Returns 1 if drop-down list activated, zero otherwise.  If the drop-down 
list is already visible, then removes it (pops it back down) and returns zero.
Available in versions 5.0 and later.
=back
=head1 AUTHOR
Jim Turner, C<< <https://metacpan.org/author/TURNERJW> >>.
=head1 COPYRIGHT
Copyright (c) 2001-2018 Jim Turner C<< <mailto:turnerjw784@yahoo.com> >>.
All rights reserved.  
This program is free software; you can redistribute 
it and/or modify it under the same terms as Perl itself.
This is a derived work from Tk::Listbox and Tk::HList.
This code may be distributed under the same conditions as Perl itself.
This is a derived work from Tk::BrowseEntry.  Tk::BrowseEntry is 
copyrighted by Rajappa Iyer
=cut
package Tk::JBrowseEntry;
use vars qw($VERSION);
$VERSION = '5.00';
use strict;
use Carp;
use Tk;
use Tk::Frame;
use Tk::LabEntry;
use base qw(Tk::Frame);
Construct Tk::Widget 'JBrowseEntry';
my ($BITMAP, $FOCUSEDBITMAP);
my $bummer = ($^O =~ /MSWin/) ? 1 : 0;
sub ClassInit
{
        my ($class,$mw) = @_;
        unless(defined($BITMAP))  #THIS TEST ACTUALLY SAVES TIME B/C IT ONLY DOES THIS ONCE IF MULTIPLE JBrowseEntry WIDGETS ARE DEFINED!
        {
                #DEFINE OUR VERY OWN DEFAULT BITMAP IMAGES FOR THE LITTLE BUTTON WIDGET (WINDOWS NEEDS DIFFERENT BUTTONS/SIZED!:
                $BITMAP = __PACKAGE__ . "::downarrwow";
                if ($Tk::platform =~ /Win32/)  #FIXME:NOT USING "bummer" HERE SINCE NOT SURE A/B cygwin PLATFORM SINCE THIS IS TK-DEPENDENT!
                {
                        my $bits = pack("b10"x10,
                                        "..........",
                                        "..........",
                                        "..........",
                                        ".#########",
                                        "..#######.",
                                        "...#####..",
                                        "....###...",
                                        ".....#....",
                                        "..........",
                                        ".........."
                                        );
                        $mw->DefineBitmap($BITMAP => 10,10, $bits);
                }
                else
                {
                        my $bits = pack("b11"x14,
                                        "...........",
                                        "....###....",
                                        "....###....",
                                        "....###....",
                                        "....###....",
                                        "....###....",
                                        ".#########.",
                                        "..#######..",
                                        "...#####...",
                                        "....###....",
                                        ".....#.....",
                                        "...........",
                                        ".#########.",
                                        ".#########."
                        );
                        $mw->DefineBitmap($BITMAP => 11,14, $bits);
                }
                $FOCUSEDBITMAP = __PACKAGE__ . "::fdownarrow";
                if ($Tk::platform =~ /Win32/)
                {
                        my $bits = pack("b10"x10,
                                        ".#.#.#.#.#",
                                        ".#.......#",
                                        "..........",
                                        ".#########",
                                        "..#######.",
                                        ".#.#####.#",
                                        "....###...",
                                        ".#...#...#",
                                        "..........",
                                        ".##.#.#.##"
                        );
                        $mw->DefineBitmap($FOCUSEDBITMAP => 10,10, $bits);
                }
                else
                {
                        my $bits = pack("b11"x14,
                                        "...........",
                                        "....###....",
                                        "....###....",
                                        "....###....",
                                        "....###....",
                                        "....###....",
                                        ".#########.",
                                        "..#######..",
                                        "...#####...",
                                        "....###....",
                                        ".....#.....",
                                        "...........",
                                        ".#########.",
                                        ".#########."
                        );
                        $mw->DefineBitmap($FOCUSEDBITMAP => 11,14, $bits);
                }
        }
}
sub Populate
{
        my ($w, $args) = @_;
        $w->{'btntakesfocus'} = 0;
        $w->{'btntakesfocus'} = delete ($args->{'-btntakesfocus'})  if (defined($args->{'-btntakesfocus'}));
        $w->{'arrowimage'} = $args->{'-arrowimage'}  if (defined($args->{'-arrowimage'}));
        $w->{'farrowimage'} = delete ($args->{'-farrowimage'})  if (defined($args->{'-farrowimage'}));
        $w->{'farrowimage'} ||= $w->{'arrowimage'}  if ($w->{'arrowimage'} && !$bummer);  #IN WINDOWS, LEAVE FOCUSED DEFAULT ALONE, OTHERWISE, IF SAME, THERE'S NO FOCUS INDICATOR!
        $w->{'mylistcmd'} = $args->{'-listcmd'}  if (defined($args->{'-listcmd'}));
        $w->{'takefocus'} = 1;
        $w->{'takefocus'} = delete ($args->{'-takefocus'})  if (defined($args->{'-takefocus'}));
        $w->{'-listwidth'} = $args->{'-width'}  if (defined($args->{'-width'}));
        $w->{'-maxwidth'} = delete($args->{'-maxwidth'})  if (defined($args->{'-maxwidth'}));
        $w->{'-foreground'} = $args->{'-foreground'}  if (defined($args->{'-foreground'}));
        $w->{'-background'} = $w->parent->cget('-background') || 'gray';
        $w->{'-background'} = $args->{'-background'}  if (defined($args->{'-background'}));
        $w->{'-textbackground'} = delete($args->{'-textbackground'})  if (defined($args->{'-textbackground'}));
        $w->{'-textforeground'} = delete($args->{'-textforeground'})  if (defined($args->{'-textforeground'}));
#unless ($bummer)  #FOR SOME REASON, THIS IS NEEDED IN LINUX?
#{
        $w->{'-disabledbackground'} = delete($args->{'-disabledbackground'})  if (defined($args->{'-disabledbackground'}));
        $w->{'-disabledforeground'} = delete($args->{'-disabledforeground'})  if (defined($args->{'-disabledforeground'}));
#}
        $w->{'-foreground'} = $w->parent->cget('-foreground');
        #$w->{'-borderwidth'} = 2;
#       $w->{'-borderwidth'} = delete($args->{'-borderwidth'})  if (defined($args->{'-borderwidth'}));  #CHGD. TO NEXT 20070904 FROM WOLFRAM HUMANN.
        $w->{'-borderwidth'} = defined($args->{'-borderwidth'}) ? delete($args->{'-borderwidth'}) : 2; 
        $w->{'-relief'} = 'sunken';
        $w->{'-relief'} = delete($args->{'-relief'})  if (defined($args->{'-relief'}));
        $w->{'-listrelief'} = 'sunken';
        $w->{'-listrelief'} = delete($args->{'-listrelief'})  if (defined($args->{'-listrelief'}));
        $w->{'-listfont'} = delete($args->{'-listfont'})  if (defined($args->{'-listfont'}));
        $w->{'-noselecttext'} = delete($args->{'-noselecttext'})  if (defined($args->{'-noselecttext'}));
        $w->{'-browse'} = 0;
        $w->{'-browse'} = delete($args->{'-browse'})  if (defined($args->{'-browse'}));
        $w->{'-tabcomplete'} = 0;
        $w->{'-tabcomplete'} = delete($args->{'-tabcomplete'})  if (defined($args->{'-tabcomplete'}));
        $w->{'-altbinding'} = 0;  #NEXT 2 ADDED 20050112 TO SUPPORT ALTERNATE KEY-ACTION MODELS.
        $w->{'-altbinding'} = delete($args->{'-altbinding'})  if (defined($args->{'-altbinding'}));
        #NEXT LINE ADDED 20060429 TO SUPPORT OPTION FOR USER DELETION OF LISTBOX ITEMS.
        $w->{'-deleteitemsok'} = delete($args->{'-deleteitemsok'})  if (defined($args->{'-deleteitemsok'}));
        $w->{'-framehighlightthickness'} = defined($args->{'-framehighlightthickness'})
                ? delete($args->{'-framehighlightthickness'}) : 1;
        #NEXT 2 OPTIONS ADDED 20070904 BY JWT:
        $w->{'-buttonborderwidth'} = defined($args->{'-buttonborderwidth'})
                ? delete($args->{'-buttonborderwidth'}) : 1;
        $w->{'-entryborderwidth'} = defined($args->{'-entryborderwidth'})
                ? delete($args->{'-entryborderwidth'}) : 0;
        $w->{'-nobutton'} = defined($args->{'-nobutton'})
                ? delete($args->{-nobutton}) : 0;
        $w->{'-labelrelief'} = defined($args->{'-labelrelief'})
                ? delete($args->{'-labelrelief'}) : 'flat';
        my $lpack = delete $args->{-labelPack};   #MOVED ABOVE SUPER:POPULATE 20050120.
        $w->SUPER::Populate($args);
        # ENTRY WIDGET AND ARROW BUTTON
        $lpack = [-side => 'left', -anchor => 'e']  unless (defined $lpack);
        my $labelvalue = $args->{'-label'};
        my $ll = $w->Label(-relief => $w->{'-labelrelief'}, -text => delete $args->{'-label'});
#       my $tf = $w->Frame(-borderwidth => ($w->{-borderwidth} || 2), -highlightthickness => 1, 
#                       -relief => ($w->{-relief} || 'sunken'));     #CHGD. TO NEXT 2 20070904 FROM WOLFRAM HUMANN.
        my $tf = $w->Frame(-borderwidth => $w->{-borderwidth}, -highlightthickness => $w->{'-framehighlightthickness'}, 
                        -relief => $w->{'-relief'});
#       my $e = $tf->LabEntry(-borderwidth => 0, -relief => 'flat');
        my $e = $tf->LabEntry(-borderwidth => $w->{'-entryborderwidth'}, -relief => 'flat');
        # FOR SOME REASON, E HAS TO BE A LABENTRY, JUST PLAIN ENTRY WOULDN'T TAKE KEYBOARD EVENTS????
 $w->ConfigSpecs(DEFAULT => [$e]);
#       my $b = $tf->Button(-borderwidth => 1, -takefocus => $w->{'btntakesfocus'},   #CHGD. TO NEXT 20070904 - JWT:
        my $b = $tf->Button(-borderwidth => $w->{'-buttonborderwidth'}, -takefocus => $w->{'btntakesfocus'}, 
                        -bitmap => $BITMAP);
        if ($labelvalue)
        {
                $ll->pack(@$lpack);
        }
        else
        {
                $ll->packForget();   # REMOVE LABEL, IF NO VALUE SPECIFIED.
        }
        $w->Advertise('entry' => $e);   #TEXT PART.
        $w->Advertise('arrow' => $b);   #ARROW BUTTON PART.
        $w->Advertise('frame' => $tf);  #SURROUNDING FRAME PART.
        my ($ee) = $w->Subwidget('entry');
        $w->Advertise('textpart' => $ee);   #TEXT COMPONENT OF LABENTRY WIDGET.
        $tf->pack(-side => 'right', -padx => 0, -pady => 0, -fill => 'x', -expand => 1);
        $b->pack(-side => 'right', -padx => 0, -pady => 0, -fill => 'y')  unless ($w->{'-nobutton'});
        $e->pack(-side => 'right', -fill => 'x', -padx => 0, -pady => 0, -expand => 1); #, -padx => 1);
        # POPUP SHELL FOR LISTBOX WITH VALUES.
        my $c = $w->Toplevel(-bd => 2, -relief => 'raised');
        $c->overrideredirect(1);
        $c->withdraw;
        my $sl = $c->Scrolled( qw/Listbox -selectmode browse -scrollbars oe/ );
        # PROPOGATE FORE & BACKGROUND COLORS TO ALL WIDGETS, IF SPECIFIED.
        if (defined($w->{'-foreground'}))
        {
                $e->configure(-foreground => $w->{'-foreground'}, -highlightcolor => $w->{'-foreground'});
                $tf->configure(-foreground => $w->{-foreground}, -highlightcolor => $w->{'-foreground'});
                $sl->configure(-foreground => $w->{-foreground}, -highlightcolor => $w->{'-foreground'});
                $b->configure(-foreground => $w->{-foreground}, -highlightcolor => $w->{'-foreground'});
        }
        $sl->configure(-relief => ($w->{'-listrelief'}||'sunken'))  if (defined($w->{'-listrelief'}));
        if (defined($w->{'-background'}) || defined($w->{'-textbackground'}))
        {
                $e->configure(-background => ($w->{'-textbackground'}||$w->{'-background'}), -highlightbackground => $w->{'-background'});
                $tf->configure(-background => $w->{'-background'}, -highlightbackground => $w->{'-background'});
                $sl->configure(-background => $w->{'-background'}, -highlightbackground => $w->{'-background'});
                $b->configure(-background => $w->{'-background'}, -highlightbackground => $w->{'-background'});
        }
        elsif ($bummer)   # SET BACKGROUND TO WINDOWS DEFAULTS (IF NOT SPECIFIED)
        {
                $sl->configure( -background => 'SystemWindow' );
        }
        if ($bummer)
        {
                $sl->configure( -borderwidth => 1);
                $c->configure( -borderwidth => ($w->{'-borderwidth'}||0), -relief => 'ridge' );
        }
        if (defined($w->{'-disabledforeground'}))   #THIS ERRS ON LINUX SOMETIMES?!
        {
                eval { $e->Subwidget('entry')->configure(-disabledforeground => $w->{'-disabledforeground'}); };
        }
        if (defined($w->{'-disabledbackground'}))
        {
                eval { $e->configure(-disabledbackground => $w->{'-disabledbackground'}); };
        }
        $sl->configure(-font => $w->{'-listfont'})  if ($w->{'-listfont'});
        $w->Advertise('choices' => $c);   #LISTBOX POPUP MAIN WINDOW PART.
        $w->Advertise('slistbox' => $sl); #ACTUAL LISTBOX ITSELF.
        $sl->pack(-expand => 1, -fill => 'both');
        # OTHER INITIALIZATIONS.
        $w->SetBindings;
        $w->{"popped"} = 0;
        $w->Delegates('insert' => $sl, 'delete' => $sl, get => $sl, DEFAULT => $e);
        $w->ConfigSpecs(
                        -listwidth   => [qw/PASSIVE  listWidth   ListWidth/,   undef],
                        -maxwidth   => [qw/PASSIVE  maxWidth   MaxWidth/,   undef],
                        -height      => [qw/PASSIVE  height      Height/,      undef],
                        -listcmd     => [qw/CALLBACK listCmd     ListCmd/,     undef],
                        -browsecmd   => [qw/CALLBACK browseCmd   BrowseCmd/,   undef],
                        -deletecmd   => [qw/CALLBACK deleteCmd   DeleteCmd/,   undef],
                        -choices     => [qw/METHOD   choices     Choices/,     undef],
                        -state       => [qw/METHOD   state       State         normal/],
                        -arrowimage  => [ {-image => $b}, qw/arrowImage ArrowImage/, undef],
                        -variable    => '-textvariable',
                        -colorstate  => [qw/PASSIVE  colorState  ColorState/,  undef],
                        -default     => ['PASSIVE', undef, undef, ''],
                DEFAULT      => [$e] );
no strict 'refs';
        my $var_ref = $w->cget( '-textvariable' );
        #SET UP DUMMY SO IT DISPLAYSS IF NO VARIABLE SPECIFIED.
        unless (defined($var_ref) && ref($var_ref))
        {
                $var_ref = '';
                $w->configure(-textvariable => \$var_ref);
        }
        eval { $w->{'default'} = $_[1]->{'-default'} || ${$_[1]->{'-variable'}}; }; 
}
sub focus
{
        my ($w) = shift;
        my ($state) = $w->cget( "-state" );
        if ($state eq 'disabled')   #MOVE FOCUS ON TO NEXT WIDGET (DON'T TAKE FOCUS).
        {
                eval {$w->focusNext->focus; };
        }
        else
        {
                my $fw = ($state eq 'readonly') ? 'frame' : 'entry';
                $w->Subwidget($fw)->focus;
                #BUTTON GETS FOCUS IF BUTTON TAKES FOCUS, BUT WIDGET ITSELF DOESN'T.
                $w->Subwidget('arrow')->focus  if (!$w->{'takefocus'} && $w->{'btntakesfocus'});
                $w->Subwidget('entry')->icursor('end');
                $w->Subwidget('entry')->selectionRange(0,'end')
                                unless ($w->{'-noselecttext'} || !$w->Subwidget('entry')->index('end'));
        }
}
sub SetBindings
{
        my $w = shift;
        my $e = $w->Subwidget('entry');
        my $f = $w->Subwidget('frame');
        my $b = $w->Subwidget('arrow');
        my $sl = $w->Subwidget('slistbox');
        my $l = $sl->Subwidget('listbox');
        local *returnFn = sub   #HANDLES RETURN-KEY PRESSED IN ENTRY AREA.
        {
                my $self = shift;
                my $keyModifier = shift || '';
                $keyModifier .= '-'  if ($keyModifier =~ /\S/o);
                my ($state) = $w->cget( "-state" );
                my $altbinding = $w->{'-altbinding'};
                return if ($state eq 'disabled' || $altbinding =~ /Return\=None\b/io);
                if ($altbinding =~ /Return\=SingleGo/io
                                && $w->Subwidget('slistbox')->index('end') < 1)
                {
                        #MAKE <RETURN> "GO" IF THE LISTBOX IS EMPTY:
                        $w->Callback(-browsecmd => $w, $w->Subwidget('entry')->get, "entry.${keyModifier}return.go");
                        Tk->break;
                        return  if ($state =~ /text/o);
                }
                elsif ($altbinding =~ /Return\=Go/io)
                {
                        $w->Popdown  if  ($w->{"popped"});   #ROLL UP (HIDE) LISTBOX.
                        $w->Callback(-browsecmd => $w, $w->Subwidget('entry')->get, "entry.${keyModifier}return.go");
                        Tk->break;
                }
                elsif ($altbinding =~ /Return\=NonEmptyGo/io)
                {
no strict 'refs';
                        my $var_ref = $w->cget( '-textvariable' );
                        if (defined($var_ref) && defined($$var_ref) && $$var_ref ne '')
                        {
                                $w->Popdown  if  ($w->{"popped"});   #UNDISPLAYS LISTBOX.
                                $w->Callback(-browsecmd => $w, $w->Subwidget('entry')->get, "entry.${keyModifier}return.go");
                                Tk->break;
                        }
                }
                elsif ($altbinding =~ /Return\=Next/io)
                {
                        $w->Popdown  if  ($w->{"popped"});   #UNDISPLAYS LISTBOX.
                        $w->Callback(-browsecmd => $w, $w->Subwidget('entry')->get, "entry.${keyModifier}return.browse")
                                        if ($w->{'-browse'} == 1);
                        eval { shift->focusNext->focus; };
                        Tk->break;
                }
                $w->LbFindSelection();
                if ($w->{'popped'})  #LISTBOX IS SHOWING:
                {
                        $e->selectionRange(0,'end')  unless ($w->{'-noselecttext'} || !$e->index('end'));
                        $e->icursor('end');
#                       $w->LbCopySelection(0,'entry.enter');
                        $w->LbCopySelection(0,'entry.${keyModifier}return');
                        Tk->break;
                }
                else
                {
                        $w->Callback(-browsecmd => $w, $w->Subwidget('entry')->get, "entry.${keyModifier}return.browse")
                        if ($w->{'-browse'} == 1);
                        return  if ($state =~ /text/o);
                        $w->BtnDown;
                }
        };
        local *rightFn = sub   #RIGHT-ARROW PRESSED IN ENTRY: COMPLETE TEXT TO NEXT MATCHING SELECTION.
        {
                Tk->break  if ($e->index('insert') < $e->index('end')
                                || $w->{'-altbinding'} =~ /Right\=NoSearch/io);
                my ($state) = $w->cget( "-state" );
                return  if ($state eq 'textonly' || $state eq 'disabled' || $w->{'-altbinding'} =~ /Right\=None/io);
no strict 'refs';
                my $var_ref = $w->cget( '-textvariable' );
                return  unless ($$var_ref =~ /\S/o);  #TEXT FIELD EMPTY, PUNT!
                my (@listsels) = $l->get('0','end');
                return  if ($#listsels < 0);  #NO LIST TO SEARCH, SO PUNT!
                my $srchPattern = $$var_ref;
                my $found = $w->LbFindSelection();   #SEARCH FOR CURRENT TEXT: RETURNS 1 IF FULL MATCH (IN LIST), -1 IF CONTAINS, 0 IF NO MATCH.
                return  unless ($found);  #NO MATCH, PUNT!
                my $index;
                $index = $w->LbIndex  if ($found < 0 && $w->LbFindSelection($srchPattern)); #IF MATCH ONLY CONTAINS TEXT, SEARCH AGAIN STARTING AT *NEXT* ENTRY.
                if (defined $index) {
                        $$var_ref = $listsels[$index];
                        $e->icursor('end');
                        $e->selectionRange(0,'end')  unless ($w->{'-noselecttext'} || !$e->index('end'));
                }
        };
        local *downFn = sub   #HANDLES DOWN-ARROW PRESSED IN ENTRY AREA.
        {
                my $altbinding = $w->{'-altbinding'};
                my ($state) = $w->cget( '-state' );
                return  if ($state eq 'textonly' || $state eq 'disabled' || $altbinding =~ /Down\=None/io);
                $w->LbFindSelection(); 
                if ($altbinding =~ /Down\=Popup/io)  #MAKE DOWN-ARROW POP UP DD-LIST.
                {
                        if ($w->{'popped'})  #LISTBOX IS SHOWING:
                        {
                                $e->selectionRange(0,'end')  unless ($w->{'-noselecttext'} || !$e->index('end'));
                                $e->icursor('end');
                                $w->LbCopySelection(1,'entry.down');
                                Tk->break;
                        }
                        else
                        {
                                return if ($state =~ /text/o || $state eq 'disabled');
                                $w->BtnDown;
                        }
                        return;
                }
                if ($w->{'popped'})  #LISTBOX IS SHOWING:
                {
                        return if ($state eq 'text');
                        $w->LbFindSelection(); 
                        $w->Subwidget("slistbox")->focus;
                }
                else
                {
                        $w->LbFindSelection();
                        my $l = $w->Subwidget('slistbox')->Subwidget('listbox');
                        my (@listsels) = $l->get('0','end');
                        my $index = $w->LbIndex(1);
                        if ($w->LbFindSelection() == 1)
                        {
                                $index += 1;
                                $index = 0  if ($index > $#listsels);
                        }
no strict 'refs';
                        my $var_ref = $w->cget( '-textvariable' );
                        $$var_ref = $listsels[$index];
                        $l->activate($index);      #ADDED 20070904 PER PATCH FROM WOLFRAM HUMANN.
                        $e->icursor('end');
                        $e->selectionRange(0,'end')  unless ($w->{'-noselecttext'} || !$e->index('end'));
                }
        };
         
        local *upFn = sub   #HANDLES UP-ARROW PRESSED IN ENTRY AREA.
        {
                my ($state) = $w->cget( '-state' );
                return  if ($state eq 'textonly' || $state eq 'disabled' || $w->{'-altbinding'} =~ /Up\=None/io);
                if ($w->{'popped'})  #LISTBOX IS SHOWING:
                {
                        return if ($state eq 'text');
                        $w->LbFindSelection();
                        $w->Subwidget("slistbox")->focus;
                }
                else
                {
                        $w->LbFindSelection();
                        my $l = $w->Subwidget('slistbox')->Subwidget('listbox');
                        my (@listsels) = $l->get('0','end');
                        my $index = $w->LbIndex(1) - 1;
                        $index = $#listsels  if ($index < 0);
no strict 'refs';
                        my $var_ref = $w->cget( '-textvariable' );
                        $$var_ref = $listsels[$index];
                        $l->activate($index);      #ADDED 20070904 PER PATCH FROM WOLFRAM HUMANN.
                        $e->icursor('end');
                        $e->selectionRange(0,'end')  unless ($w->{'-noselecttext'} || !$e->index('end'));
                }
        };
        local *escapeFn = sub   #HANDLES ESCAPE-KEY PRESSED IN ENTRY AREA.
        {
                return  if ($w->{'-altbinding'} =~ /Esc\=None/io);
                if ($w->{'popped'})  #LISTBOX IS SHOWING:
                {
                        $w->Popdown;
                }
                else
                {
no strict 'refs';
                        my $var_ref = $w->cget( '-textvariable' );
                        #if ($$var_ref eq $w->{'default'} && $w->cget( '-state' ) ne 'readonly')
                        #CHGD. TO NEXT 20030531 PER PATCH BY FRANK HERRMANN.
                        $$var_ref = (defined $w->{'default'} and $$var_ref eq $w->{'default'} 
                                        and $w->cget( '-state' ) ne 'readonly') ? '' : $w->{'default'};
                        $e->icursor('end');
                }
                $e->selectionRange(0,'end')  unless ($w->{'-noselecttext'} || !$e->index('end'));   #ADDED 20020716
                Tk->break;
        };
        local *spacebarFn = sub   #HANDLES SPACEBAR PRESSED IN ENTRY AREA.
        {
                return  if ($w->{'-altbinding'} =~ /Space\=None/io);
                my ($state) = $w->cget( '-state' );
                if ($state eq 'readonly')
                {
                        my $res = $w->LbFindSelection();
                        if ($w->{'popped'})  #LISTBOX IS SHOWING:
                        {
                                $e->selectionRange(0,'end')  unless ($w->{'-noselecttext'} || !$e->index('end'));
                                $e->icursor('end');
                                $w->LbCopySelection(0,'entry.space');
                                Tk->break;
                        }
                        else
                        {
                                $w->BtnDown;
                                unless ($res)   #ADDED 20090320 TO CAUSE DROP-DOWN LIST TO POP DOWN W/ACTIVE CURSOR IN RIGHT PLACE (INSTEAD OF BOTTOM) IF ENTRY FIELD EMPTY.
                                {
                                        $l->selectionClear('0','end');
                                        $l->activate(0);
                                        $l->selectionSet(0);
                                        $l->update();
                                        $l->see(0);
                                }
                        }
                }
        };
        # SET BIND TAGS
        $w->bindtags([$w, 'Tk::JBrowseEntry', $w->toplevel, 'all']);
        $e->bindtags([$e, $e->toplevel, 'all']);
        # IF USER-SPECIFIED IMAGE(S), CHANGE BUTTON IMAGE WHEN GETTING/LOSING FOCUS.
        $b->bind('<FocusIn>', sub
        {
                my $img = $w->{'farrowimage'}; # || $b->cget('-image');
                if ($img)
                {
                        $b->configure(-image => $img);                                    
                }
                else
                {
                        $b->configure(-image => undef);
                        $b->configure(-bitmap => $FOCUSEDBITMAP);
                }
                $w->{'savehl'} = $f->cget('-highlightcolor');
                my $framehlcolor = $w->{'-background'} || ($bummer ? 'SystemButtonFace' : $e->cget( '-background' ));
                $f->configure(-highlightcolor => $framehlcolor);
                Tk->break;
        });
        $b->bind('<FocusOut>', sub
        {
                $f->configure(-highlightcolor => $w->{'savehl'})  if ($w->{'savehl'});
                unless ($w->focusCurrent =~ /Listbox/o) {
                        my $img = $w->{'arrowimage'}; # || $b->cget('-image');
                        if ($img)
                        {
                                $b->configure(-image => $img);
                        }
                        else
                        {
                                $b->configure(-image => undef);                                   
                                $b->configure(-bitmap => $BITMAP);
                        }
                        Tk->break;
                }
        });
        $b->bind('<ButtonRelease-1>', sub   #MOUSE CLICKED ON BUTTON.
        {
                unless ($b->cget( '-state' ) eq 'disabled')
                {
                        $w->LbFindSelection()  if ($w->{'popped'});  #(IF LISTBOX IS SHOWING):
                        $w->BtnDown;    #POPS UP LISTBOX!
                        if ($w->{'popped'})
                        {
                                my $index = $w->LbIndex(1);
                                $sl->focus;
                                $sl->raise;
                                $l->activate($index);         #THIS UNDERLINES IT.
                                $l->selectionClear(0,'end');  #THIS HIGHLIGHTS IT (NEEDED 1ST TIME?!)
                                $l->selectionSet($index);     #THIS HIGHLIGHTS IT (NEEDED 1ST TIME?!)
                        }
                        else
                        {
                                $w->focus;
                        }
                        $w->LbCopySelection(1,'button.button1');
                }
                Tk->break;
        });
        $b->bind('<space>', sub
        {
                my ($state) = $w->cget( '-state' );
                return if ($state =~ /text/o || $state eq 'disabled');
                $w->LbFindSelection();
                $w->BtnDown;
        });
        $b->bind('<Return>', sub
        {
                my ($state) = $w->cget( '-state' );
                return if ($state =~ /text/o || $state eq 'disabled');
                $w->LbFindSelection();
                $w->BtnDown;
                Tk->break;
        });
        $b->bind('<Down>', sub
        {
                my ($state) = $w->cget( '-state' );
                return if ($state =~ /text/o || $state eq 'disabled');
                $w->LbFindSelection();
                $w->BtnDown;
                Tk->break;
        });
        $e->bind('<Shift-Return>', [\&returnFn, 'mod.Shift']);
        $f->bind('<Shift-Return>', [\&returnFn, 'mod.Shift']);
        $e->bind('<Control-Return>', [\&returnFn, 'mod.Control']);
        $f->bind('<Control-Return>', [\&returnFn, 'mod.Control']);
        $e->bind('<Alt-Return>', [\&returnFn, 'mod.Alt']);
        $f->bind('<Alt-Return>', [\&returnFn, 'mod.Alt']);
        $e->bind('<Return>', \&returnFn);
        $f->bind('<Return>', \&returnFn);
        $e->bind('<Down>', \&downFn);
        $f->bind('<Down>', \&downFn);
        $e->bind('<space>', \&spacebarFn);
        $f->bind('<space>', \&spacebarFn);
        $e->bind('<Up>', \&upFn);
        $f->bind('<Up>', \&upFn);
        $e->bind('<Escape>' => \&escapeFn);
        $f->bind('<Escape>' => \&escapeFn);
        $e->bind('<Left>', sub {Tk->break;});
        #$e->bind('<Right>', sub {Tk->break;});
        $e->bind('<Right>', \&rightFn);
        $f->bind('<Left>', sub {Tk->break;});
        #$f->bind('<Right>', sub {Tk->break;});
        $f->bind('<Right>', \&rightFn);
        $e->bind('<<LeftTab>>', sub      #ADDED 20070904 PER PATCH FROM WOLFRAM HUMANN.
        {
                my ($state) = $w->cget( '-state' );
                $w->Popdown  if  ($w->{'popped'});
                if ($state =~ /only/o || (!$w->{'takefocus'} && !$w->{'btntakesfocus'}))
                {
                        $w->focusPrev;
                }
                else
                {
                        $w->focusCurrent->focusPrev;
                        $w->focusCurrent->focusPrev  unless ($state =~ /only/o);
                }
                Tk->break;
        });
        $f->bind('<<LeftTab>>', sub
        {
                my ($state) = $w->cget( '-state' );
                $w->Popdown  if  ($w->{'popped'});
                if ($state =~ /only/o || (!$w->{'takefocus'} && !$w->{'btntakesfocus'}))
                {
                        $w->focusPrev;
                }
                else
                {
                        $w->focusCurrent->focusPrev;
                        $w->focusCurrent->focusPrev  unless ($state =~ /only/o);
                }
                Tk->break;
        });
        $b->bind('<<LeftTab>>', sub      #ADDED 20180621 TO PROPERLY REVERSE TABBING FROM ENTRY TO BUTTON (JFileDialog)!
        {
                $w->Popdown  if  ($w->{'popped'});
                if ($w->{'takefocus'})
                {
                        $w->focus;
                }
                else
                {
                        $w->focusPrev;
                }
                Tk->break;
        });
        $e->bind('<Tab>', sub
        {
                my $same = 1;
                #NEXT LINE ADDED 20030531 PER PATCH BY FRANK HERRMANN.
                $w->Callback(-browsecmd => $w, $w->Subwidget('entry')->get, 'entry.tab')
                                if ($w->{'-browse'} == 1);
                if ($w->{'-tabcomplete'})
                {
no strict 'refs';
                        my $var_ref = $w->cget( '-textvariable' );
                        if ($w->LbFindSelection())
                        {
                                my @listsels = $l->get('0','end');
                                my $index = $w->LbIndex(1);
                                unless ($$var_ref eq $listsels[$index])
                                {
                                        $$var_ref = $listsels[$index];
                                        $e->icursor('end');
                                        $same = 0;
                                }
                        }
                        elsif ($w->{'-tabcomplete'} == 2)
                        {
                                #THIS CODE FORCES TAB TO CHANGE TEXT ENTERED TO A LIST ITEM!
                                #THIS SUCKS IF THERE IS NO LIST OR USER WISHES TO OVERRIDE!
                                unless ($$var_ref eq ((defined $w->{'default'}) ? $w->{'default'} : ''))
                                {
                                        $$var_ref = (defined $w->{'default'}) ? $w->{'default'} : '';
                                        $e->icursor('end');
                                        $same = 0;
                                }
                        }
                        $e->selectionRange(0,'end')  unless ($w->{'-noselecttext'} || !$e->index('end'));
                }
                $w->{'searchindx'} = 0;
                $w->Popdown  if  ($w->{'popped'});   #UNDISPLAYS LISTBOX.
                eval { shift->focusNext->focus; }  if ($same);
                Tk->break;
        });
        $f->bind('<Tab>', sub
        {
                #NEXT LINE ADDED 20030531 PER PATCH BY FRANK HERRMANN.
                $w->Callback(-browsecmd => $w, $w->Subwidget('entry')->get, 'frame.tab')
                                if ($w->{'-browse'} == 1);
                $w->{'searchindx'} = 0;
                $w->Popdown  if  ($w->{'popped'});
                eval { shift->focusNext->focus; };
        });
        # KEYBOARD BINDINGS FOR LISTBOX
        $l->configure(-selectmode => 'browse');
        $l->configure(-takefocus => 1); 
        $l->bind('<Shift-ButtonRelease-1>', sub
        {
                #JWT: NEXT 3 TO UNPOP MENU IF BUTTON PRESSED OUTSIDE OF LISTBOX.
                my $s = $w->Subwidget("slistbox");
                my $e = $s->XEvent;
                $w->LbClose  unless (defined $e);
                LbChoose($w, $l->XEvent->x, $l->XEvent->y, 'mod.Shift');
                Tk->break;     #ADDED 20050210.
        });
        $l->bind('<Control-ButtonRelease-1>', sub
        {
                #JWT: NEXT 3 TO UNPOP MENU IF BUTTON PRESSED OUTSIDE OF LISTBOX.
                my $s = $w->Subwidget("slistbox");
                my $e = $s->XEvent;
                $w->LbClose  unless (defined $e);
                LbChoose($w, $l->XEvent->x, $l->XEvent->y, 'mod.Control');
                Tk->break;     #ADDED 20050210.
        });
        $l->bind('<Alt-ButtonRelease-1>', sub
        {
                #JWT: NEXT 3 TO UNPOP MENU IF BUTTON PRESSED OUTSIDE OF LISTBOX.
                my $s = $w->Subwidget("slistbox");
                my $e = $s->XEvent;
                $w->LbClose  unless (defined $e);
                LbChoose($w, $l->XEvent->x, $l->XEvent->y, 'mod.Alt');
                Tk->break;     #ADDED 20050210.
        });
        $l->bind('<ButtonRelease-1>', sub
        {
                #JWT: NEXT 3 TO UNPOP MENU IF BUTTON PRESSED OUTSIDE OF LISTBOX.
                my $s = $w->Subwidget("slistbox");
                my $e = $s->XEvent;
                $w->LbClose  unless (defined $e);
                LbChoose($w, $l->XEvent->x, $l->XEvent->y);
                Tk->break;     #ADDED 20050210.
        });
        $l->bind('<Escape>' => sub
        {
                $w->LbClose;
                Tk->break;
        });
        $l->bind('<Return>' => sub
        {
                #$e->selectionRange(0,'end')  unless ($w->{'-noselecttext'} || !$e->index('end'));
                #$e->icursor('end');
                $w->LbCopySelection(0,'listbox.return');
                Tk->break;
        });
        $l->bind('<space>' => sub
        {
                my ($state) = $w->cget( "-state" );
                my $index = $w->LbIndex(1);
                $e->selectionRange(0,'end')  unless ($w->{'-noselecttext'} || !$e->index('end'));
                $e->icursor('end');
                $w->LbCopySelection(0,'listbox.space',1);
                Tk->break;
        });
        $l->bind('<Tab>' => sub
        {
                my ($state) = $w->cget( "-state" );
                if ($w->{'-altbinding'} =~ /Tab\=PopList/io)
                {
                        #BEHAVE LIKE MODERN COMBOS - SIMPLY HIDE THE LISTBOX AND FOCUS BACK ON THE TEXT FIELD W/O CHANGING IT'S CONTENT:
                        $w->Popdown;
                        $w->focus;
                }
                else  #BEHAVE OUR OLD WAY: LEAVE DD-LIST SHOWING, BUT PUT FOCUS ON THE TEXT FIELD W/O CHANGING IT'S CONTENT:
                {
                        if ($w->{'-tabcomplete'} && $w->LbFindSelection())  #IF TAB COMPLETES SELECTION, SET TEXT FIELD TO NEAREST MATCH IN LIST:
                        {
                                my @listsels = $l->get('0','end');
                                my $index = $w->LbIndex(1);
no strict 'refs';
                                my $var_ref = $w->cget( '-textvariable' );
                                $$var_ref = $listsels[$index]  unless ($$var_ref eq $listsels[$index])
                        }
                        $e->focus;
                        $e->icursor('end');
                        $e->selectionRange(0,'end')  unless ($w->{'-noselecttext'} || !$e->index('end'));
                }
                Tk->break;
        });
        if ($w->{'-deleteitemsok'})
        {
                $l->bind('<Delete>' => sub
                {
                        my $index = $w->LbIndex;
                        if (defined($index) && $index >= 0)
                        {
                                my $x = $w->Callback('-deletecmd', $w, $w->LbIndex);  #CALL 1ST (W/INDEX OF ITEM 2B DELETED) BEFORE DELETING (PROGRAMMER CAN BLOCK THE DELETE PENDING THE RESULT)!
                                if (!defined($x) || !$x)   #IF NO CALLBACK -OR- CALLBACK RETURNS FALSE, DELETE THE ITEM HIGHLIGHTED:
                                {
                                        $w->delete($index);
                                        $w->Callback('-deletecmd', $w, -1);   #CALL AGAIN W/-1 TO ALLOW PROGRAMMER TO DO SOMETHING WHEN DELETED, IE. UPDATE A CURRENT ITEM LIST VARABLE, ETC!
                                }
                        }
                });   #ADDED 20060429 TO SUPPORT OPTION FOR USER DELETION OF LISTBOX ITEMS.
        }
        if ($ENV{'jwtlistboxhack'}) {   #WE'RE USIN' OUR HACKED LISTBOX THAT CAN TELL US IF WE'RE AT TOP OR BOTTOM!:
                $l->bind('<<ListboxTop>>' => sub {
                        if ($w->{'-altbinding'} =~ /Listbox\=Circular/io) {  #WE'RE AT TOP OF CIRCULAR LIST, SO CIRCLE BACK TO BOTTOM!:
                                $l->selectionClear('0','end');
                                $l->activate('end');
                                $l->selectionSet('end');
                                $l->update();
                                $l->see('end');
                                Tk->break;
                        } elsif ($w->{'-altbinding'} =~ /(?:Down|Up)\=Popup/io) {  #WE'RE AT TOP, UN-POP THE LISTBOX!:
                                $w->Popdown;
                                $e->icursor('end');
                                $e->selectionRange(0,'end')  unless ($w->{'-noselecttext'} || !$e->index('end'));   #ADDED 20020716
                        }
                });
                $l->bind('<<ListboxBottom>>' => sub {
                        if ($w->{'-altbinding'} =~ /Listbox\=Circular/io) {  #WE'RE AT BOTTOM OF CIRCULAR LIST, SO CIRCLE BACK TO TOP!:
                                $l->selectionClear('0','end');
                                $l->activate(0);
                                $l->selectionSet(0);
                                $l->update();
                                $l->see(0);
                                Tk->break;
                        }
                });
        }
        $l->bind('<Key>' => [\&keyFn,$w,$e,$l,1]);  
        $e->bind('<Key>' => [\&keyFn,$w,$e,$l]);
        $f->bind('<Key>' => [\&keyFn,$w,$e,$l]);
        $e->bind('<ButtonRelease-1>' => sub { 
                my ($state) = $w->cget( '-state' );
                if ($state eq 'readonly')
                {
                        my $res = $w->LbFindSelection();
                        if ($w->{'popped'})  #LISTBOX IS SHOWING:
                        {
                                $w->Popdown(1);
                        }
                        else
                        {
                                unless ($res)   #ADDED 20090320 TO CAUSE DROP-DOWN LIST TO POP DOWN W/ACTIVE CURSOR IN RIGHT PLACE (INSTEAD OF BOTTOM) IF ENTRY FIELD EMPTY.
                                {
                                        $l->selectionClear('0','end');
                                        $l->activate(0);
                                        $l->selectionSet(0);
                                        $l->update();
                                        $l->see(0);
                                }
                                $w->BtnDown;
                        }
                        Tk->break;
                }
                else
                {
                        $w->Popdown(1)  if ($w->{'popped'});
                        $e->focus;
                        Tk->break;
                }
        });
        #NEXT 3 LINES ADDED 20030531 PER PATCH BY FRANK HERRMANN.
        # ALLOW CLICK OUTSIDE THE POPPED UP LISTBOX TO POP IT DOWN.
        $w->bind('<ButtonRelease-1>', sub
        {
                $w->Popdown(1)  if ($w->{'popped'});
                Tk->break;
        });
        $w->parent->bind('<ButtonRelease-1>', sub
        {
                $w->Popdown(1)  if ($w->{'popped'});
                Tk->break;
        });
        $w->bind('<FocusIn>', \&focus);
}
sub keyFn   #JWT: TRAP LETTERS PRESSED AND ADJUST SELECTION ACCORDINGLY.
{
        my ($x,$w,$e,$l,$flag) = @_;   #FLAG IS 1 IF CALLED FROM THE LISTBOX.
        my $mykey = $x->XEvent->A;     #DOESN'T SEEM TO GET CALLED IF USER TYPES A SPACE?!
        $flag = 0  unless (defined $flag);
        #NEXT LINE ADDED 20030531 PER PATCH BY FRANK HERRMANN.
        if (!$flag && $w->{'-browse'} == 1 && ($mykey =~ /\S/o || $mykey eq ' ')) {
                $w->Callback(-browsecmd => $w, $w->Subwidget('entry')->get, "key.$mykey");
        }
        if ($w->cget( '-state' ) eq 'readonly')  #ADDED 20020711 TO ALLOW TYPING 1ST LETTER TO SELECT NEXT VALID ITEM!
        {
                $w->LbFindSelection($mykey)  if ($mykey);  #JUMP TO 1ST ITEM STARTING WITH THIS KEY
                $w->LbCopySelection(1,"key.$mykey");
                $w->Subwidget('entry')->selectionRange(0,'end')  unless ($w->{'popped'} 
                                || $w->{'-noselecttext'} || !$w->Subwidget('entry')->index('end'));
                $e->icursor('end');
        }
        elsif ($flag == 1)      #LISTBOX HAS FOCUS:
        {
                $w->LbFindSelection($mykey)  if ($mykey =~ /\S/o);  #JUMP TO NEXT ITEM STARTING WITH THIS KEY
        }
        else                    #TEXT FIELD HAS FOCUS:
        {
                $w->LbFindSelection()  if ($mykey =~ /\S/o);  #JUMP TO 1ST ITEM MATCHING TEXT FIELD.
                if (!$flag && $w->{'-browse'} == 1 && ($mykey =~ /\S/o || $mykey eq ' ')) {
                        $w->Subwidget('entry')->selectionRange(0,'end')
                                        unless ($w->{'-noselecttext'} || !$w->Subwidget('entry')->index('end'));
                        $e->icursor('end');
                }
        }
}
sub BtnDown
{
        my ($w) = shift;
        my ($state) = $w->cget( '-state' );
        return  if ($state =~ /text/o || $state eq 'disabled');
        #JWT:   NEXT 2 LINES PREVENT POPPING EMPTY LIST!
        my $l = $w->Subwidget('slistbox')->Subwidget('listbox');
        return  unless ($l->get('0','end'));
        if ($w->{'popped'})  #DD-LIST ALREADY DISPLAYED ("POPPED UP"):
        {
                $w->Popdown(1);
        }
        else
        {
                #JWT:ADDED FANCY SLEEP FUNCTION TO DELAY POPPING LISTBOX PAINE UP SINCE AFTERSTEP RAISES THE MAIN WINDOW ABOVE
                #IT *HIDING THE LISTBOX UNDERNEITH* WHEN FOCUSING THE WINDOW ("AutoRaise" (should set to zero) ON "ClickToFocus")
                #(I'D LEAVE THIS RICKETY OL' ORPHANED WM IF I COULD FIND ANOTHER THAT WOULD SWALLOW MY TkWeather APP
                #AND COULD BE CUSTOMIZED AS BEAUTIFULLY AS AfterStep!)
#DEPRECIATED!:          select(undef, undef, undef, 0.2)  if ($ENV{'DESKTOP_SESSION'} =~ /AfterStep version 2.2.1[2-9]/o or $ENV{'SUDO_USER'});  #FANCY QUICK-NAP FUNCTION!
                $w->PopupChoices;
                $w->Subwidget('slistbox')->focus;
        }
}
sub PressButton  #NEW USER-CALLABLE FUNCTION (v5.0+) TO EFFECT A DROP-DOWN BUTTON PRESS (POPUP DD-LIST & GIVE IT FOCUS):
{
        my ($w) = shift;
        my ($state) = $w->cget( '-state' );
        return 0  if ($state =~ /text/o || $state eq 'disabled');
        $w->{'savefocus'} = $w->focusCurrent;
        $w->BtnDown;
        return 1;
}
sub PopupChoices   # POP UP (DISPLAY) THE DD-LIST BOX!:
{
        my $w = shift;
#       my $first;   -- REMOVED 20070904 PER PATCH BY WOLFRAM HUMANN (PROBABLY OBSOLETED BY FRANK HERRMANN PATCHES
        if (!$w->{'popped'})
        {
                my $x = $w->Callback(-listcmd, $w);
                return undef  if (defined($x) && $x =~ /nolist/io);   #IF -listcmd CALLBACK RETURNS 'nolist',
                my $e = $w->Subwidget('entry');        #THEN DON'T DISPLAY THE DROP-DOWN LIST!
                my $c = $w->Subwidget('choices');
                my $s = $w->Subwidget('slistbox');
                my $a = $w->Subwidget('arrow');
                my $wheight = $w->cget('-height');
                my (@hh);
                $hh[0]=$w->height;
                $hh[1]=$w->reqheight;
                $hh[2]=$e->height;
                $hh[3]=$e->reqheight;
                $hh[4]=$c->height;
                $hh[5]=$c->reqheight;
                $hh[6]=$s->height;
                $hh[7]=$s->reqheight;
                my $sll = $s->Subwidget('listbox');
                my $rw = $c->width; 
#               $first = 1  if ($rw <= 1);   -- REMOVED 20070904 PER PATCH BY WOLFRAM HUMANN
                my ($itemcnt) = $sll->index('end');
                $wheight = 10  unless ($wheight);
                $wheight = $itemcnt  if ($itemcnt < $wheight);
                $wheight = $itemcnt  unless ($wheight);
                $wheight = $itemcnt  unless ($wheight || $itemcnt > 10);
                if ($wheight)
                {
                        $sll->configure(-height => ($wheight * $w->height));
                        $w->update;
                }
                my $y1 = $e->rooty + $e->height + 3;
                #my $bd = $c->cget(-bd) + $c->cget(-highlightthickness);  #CHGD. TO NEXT 20050120.
                my $bd = $c->cget(-bd);
                my ($unitpixels, $ht, $x1, $ee, $width, $x2);
                if ($bummer)
                {
                        $y1 -= 3 - ($w->{'-borderheight'} || 2);
                        #$unitpixels = $e->height + 1;  #CHGD. TO NEXT 20040827 - WINBLOWS XP SEEMS TO NOT BEVEL THE HIGHLIGHT CURSOR, 
                        $unitpixels = $e->height - 1;   #SO THE WIDTH OF EACH ITEM IS NOW 2 PIXELS SMALLER! (USE OLD LINE, IF BEVELLED)!
                        $ht = ($wheight * $unitpixels) + (2 * $bd) + 4;
                        $ee = $w->Subwidget('frame');
                        $x1 = $ee->rootx;
                        $x2 = $a->rootx + $a->width;
                        $width = ($w->{'-nobutton'}) ? ($e->width + ($w->{'-borderwidth'} || 2)) : ($x2 - $x1);
                        if ($w->{'-nobutton'})
                        {
                                my $wheight = $w->cget('-height');
                                if (defined($wheight) && $wheight > 0) {
                                        my $itemcnt = $sll->index('end');
                                        $width += $s->Subwidget('yscrollbar')->cget('-width') + 6;
                                }
                        }
                        #$rw = $width + $w->{'-borderwidth'};
                        #CHGD. TO NEXT 20030531 PER PATCH BY FRANK HERRMANN.
                        #$rw = ($width || 0) + ($w->{'-borderwidth'} || 0);
                        $rw = $width;
                        $x1 += 1;  #FUDGE MORE FOR WINDOWS (THINNER BORDER) TO MAKE DROP-DOWN LINE UP VERTICALLY W/ENTRY&BUTTON.
                }
                else
                {
                        $y1 -= 3 - ($w->{'-borderheight'} || 2);
                        #$unitpixels = $e->height - 1;   #CHGD. TO NEXT 2 20050120.
                        $unitpixels = $e->height - (2 * $w->cget(-highlightthickness));
                        $unitpixels += 1;
                        $ht = ($wheight * $unitpixels) + (2 * $bd) + 6;
                        $ee = $w->Subwidget('frame');
                        $x1 = $ee->rootx;
                        $x2 = $a->rootx + $a->width;
                        $width = ($w->{'-nobutton'}) ? ($e->width + ($w->{'-borderwidth'} || 2)) : ($x2 - $x1);
                        if ($w->{'-nobutton'})
                        {
                                my $wheight = $w->cget('-height');
                                if (defined($wheight) && $wheight > 0) {
                                        my $itemcnt = $sll->index('end');
                                        $width += $s->Subwidget('yscrollbar')->cget('-width') + 6;
                                }
                        }
                        $rw = $width;    #ADDED 20020815 TO CAUSE LISTBOX TO ADJUST WIDTH TO SAME AS VARYING ENTRY FIELD!
#                       if ($first)   -- REMOVED 20070904 PER PATCH BY WOLFRAM HUMANN
#                       {
                                #NEXT LINE ADDED 20030531 PER PATCH BY FRANK HERRMANN.
                                $w->{'-borderwidth'} = 0  unless (defined $w->{'-borderwidth'});
#                               $rw += 1 + int($w->{'-borderwidth'} / 2);  -- CHGD. TO NEXT 20070904 - SEEMS TO WORK BETTER!
                                $rw += $w->{'-borderwidth'};
#                               $first = 0;   -- REMOVED 20070904 PER PATCH BY WOLFRAM HUMANN
                                #THANKS, WOLFRAM!
#                       }
                        # IF LISTBOX IS TOO FAR RIGHT, PULL IT BACK TO THE LEFT
                        $x1 = $w->vrootwidth - $width  if ($x2 > $w->vrootwidth);
                        $x1 += 1;  #FUDGE MORE FOR WINDOWS (THINNER BORDER) TO MAKE DROP-DOWN LINE UP VERTICALLY W/ENTRY&BUTTON.
                }
                # IF LISTBOX IS TOO FAR LEFT, PULL IT BACK TO THE RIGHT
                $x1 = 0  if ($x1 < 0);
                # IF LISTBOX IS BELOW BOTTOM OF SCREEN, PULL IT UP.
                my $y2 = $y1 + $ht;
                $y1 = $y1 - $ht - ($e->height - 5)  if ($y2 > $w->vrootheight);
                $c->geometry(sprintf('%dx%d+%d+%d', $rw, $ht, $x1, $y1));
                $c->deiconify;
                $c->raise;
                $s->focus;
                $w->{'popped'} = 1;
                $w->LbFindSelection();
                $s->see('active');
                $c->configure(-cursor => 'arrow');
                $w->grabGlobal;
        }
}
sub LbChoose  # CHOOSE VALUE FROM LISTBOX WITH THE MOUSE IF APPROPRIATE.
{
        my ($w, $x, $y, $keyModifier) = @_;
        my $l = $w->Subwidget('slistbox')->Subwidget('listbox');
        $keyModifier ||= ''  unless (defined $keyModifier);
        $keyModifier .= '-'  if ($keyModifier =~ /\S/o);
        if ((($x < 0) || ($x > $l->Width)) || (($y < 0) || ($y > $l->Height)))
        {
                # MOUSE WAS CLICKED OUTSIDE THE LISTBOX... CLOSE THE LISTBOX
                $w->LbClose;
        }
        else
        {
                #NEXT 5 ADDED @v5 FROM Tk::BrowseEntry DUE TO STUFF NOT ALWAYS BEING SELECTED W/MOUSE:
                my $inx = $l->nearest($y);
                if (defined $inx) {
                        $l->selectionClear(0, "end");
                        $l->selectionSet($inx);
                }
                # SELECT APPROPRIATE ENTRY AND CLOSE THE LISTBOX
                $w->LbCopySelection(0,"listbox.${keyModifier}button1");
        }
}
# CLOSE THE LISTBOX AFTER CLEARING SELECTION.
sub LbClose
{
        my $w = shift;
        my $l = $w->Subwidget('slistbox')->Subwidget('listbox');
        $l->selection('clear', 0, 'end');
        $w->Popdown;
}
# COPY THE LISTBOX-SELECTION TO THE ENTRY FIELD, AND CLOSE (ROLL UP) LISTBOX (UNLESS JUSTCOPY SET).
sub LbCopySelection
{
        my ($w, $justcopy, $action, $forceSelect) = @_;
        my $index = $w->LbIndex($forceSelect);
        my $e = $w->Subwidget('entry');
        if (defined $index)
        {
                $w->{'curIndex'} = $index;
                my $l = $w->Subwidget('slistbox')->Subwidget('listbox');
no strict 'refs';
                my $var_ref = $w->cget( '-textvariable' );
                $$var_ref = $l->get($index);
                $e->icursor('end');
        }
        if ($w->{'popped'} && !$justcopy)
        {
                $w->{'searchindx'} = 0;
                $w->Popdown;  # ROLL UP THE LISTBOX, SINCE IT'S VISIBLE:
                my $altbinding = $w->{'-altbinding'};
                if ($altbinding =~ /NoListbox\=([^\;]+)/io) {
                        my @noActions = split(/\,/o, $1);
                        my $res;
                        foreach my $i (@noActions) {
                                $i = 'listbox.' . $i  unless ($i =~ /listbox\./io);
                                eval "\$res = (\$action =~ /^$i/i);";
                                return  if ($res);
                        }
                }
                my $gettext = $e->get;
                $w->Callback(-browsecmd => $w, $gettext, $action)  if (defined $index);
        }
}
# GRAB TEXT TYPED IN AND FIND NEAREST ENTRY IN LISTBOX AND SELECT IT.
# LETTERSEARCH SET MEANS SEARCH FOR *NEXT* MATCH OF SPECIFIED LETTER,
# CLEARED MEANS SEARCH FOR *1ST* ITEM STARTING WITH CURRENT TEXT ENTRY VALUE.
# THE TRICK HERE IS THAT WHEN USER CLEARS AND THEN TYPES LETTERS INTO THE 
# TEXT BOX OR A LETTER INTO THE DROP-DOWN LIST, WE "REMEMBER" WHERE WE 
# WERE IN THE LIST SO THAT IF THEY RIGHTARROW-COMPLETE IT COMPLETES 
# THE TEXT FIELD WITH THAT ENTRY, THEN, IF THEY DO IT AGAIN, WE START 
# WITH THE NEXT INDEX SO THAT, IF THERE ARE MORE THAN ONE MATCHING 
# VALUES, THEY'LL ADVANCE TO THE *NEXT* MATCH RATHER THAN GETTING 
# IT COMPLETED WITH THE SAME ONE AGAIN!:  (searchindx)
sub LbFindSelection
{
        my ($w, $srchval) = @_;
        my $lettersearch = 0;
        if (defined($srchval) && $srchval)
        {
                $lettersearch = 1;
        }
        else
        {
                my $var_ref = $w->cget( '-textvariable' );
                $srchval = (defined($var_ref) && ref($var_ref) && defined($$var_ref))
                                ? $$var_ref : '';
                unless ($srchval =~ /\S/o)
                {
                        $w->Subwidget('slistbox')->Subwidget('listbox')->activate(0);
                        return 0;
                }
        }
        my $l = $w->Subwidget('slistbox')->Subwidget('listbox');
        my (@listsels) = $l->get('0','end');
        return 0  if ($#listsels < 0);
        unless ($lettersearch)   #DON'T BOTHER W/EXACT MATCHING IF JUST SEARCHING FOR (FIRST FEW) LETTERS:
        {
                foreach my $i (0..$#listsels)   #SEARCH FOR TRUE EQUALITY.
                {
                        if ($listsels[$i] eq $srchval)
                        {
                                $l->selectionClear('0','end');
                                $l->activate($i);
                                $l->selectionSet($i);
                                $l->update();
                                $l->see($i);
                                return 1;    #EXACT MATCH
                        }
                }
        }
        my $index = $w->{'searchindx'} || 0;
                 
        foreach my $i (0..$#listsels)   #SEARCH W/O REGARD TO CASE, START W/CURRENT SELECTION.
        {
                #if ($listsels[$index] =~ /^$srchval/i)
                #CHGD. TO NEXT 20030531 PER PATCH BY FRANK HERRMANN.
#               if (defined $srchval && $listsels[$index] =~ /^$srchval/i) #CHGD TO NEXT 20060429 TO PREVENT TK-ERROR ON "("!
                if ($listsels[$index] =~ /^\Q$srchval\E/i)
                {
                        $l->selectionClear('0','end');
                        $l->activate($index);
                        $l->selectionSet($index);
                        $l->update();
                        $l->see($index);
                        if ($lettersearch) {
                                ++$w->{'searchindx'};
                                $w->{'searchindx'} = 0  if ($w->{'searchindx'} > $#listsels);
                        }
                        return ($listsels[$index] =~ /^\Q$srchval\E$/i) ? 1 : -1;  #(1=EXACT MATCH, CASE INSENSITIVE, -1=MATCH CONTAINS SEARCH STRING.
                }
                ++$index;
                $index = 0  if ($index > $#listsels);    #ROLL BACK AROUND IF AT BOTTOM.
                $w->{'searchindx'} = $index;
        }
        $l->selectionClear('0','end');
        $l->activate(0);
        $l->see(0);
        $w->{'searchindx'} = 0;
        return 0;  #NO MATCH!
}
sub LbIndex
{
        my ($w, $flag) = @_;
        #CHANGED NEXT 5 TO FOLLOWING 2 (20180707) TO *NOT* TREAT ACTIVE ELEMENT AS SELECTED IF IT ISN'T.
        #SPACEBAR WILL SELECT IT, HITTING [Enter] WILL LEAVE ENTRY TEXT UNCHANGED SINCE NOTHING SELECTED - 
        #I DECIDED THIS WAS PREFERRED, IN PARTICULAR IF ONE PRESSED A CHARACTER, HIT [Enter] AND NOTHING 
        #MATCHES, DO NOT JUST SELECT THE CURRENTLY-ACTIVE ENTRY (THAT DOESN'T MATCH)!
#       my $sel = $w->Subwidget('slistbox')->Subwidget('listbox')->curselection 
#               || $w->Subwidget('slistbox')->Subwidget('listbox')->index('active');
#       $sel = $w->Subwidget('slistbox')->Subwidget('listbox')->index('active')
#                       unless ($sel =~ /^\d+$/o);   #JWT:  ADDED 20040819 'CAUSE CURSELECTION SEEMS TO RETURN "ARRAY(XXXX)" NOW?!?!?!
#       return (defined $sel) ? int($sel) : 0;
        (my $sel) = $w->Subwidget('slistbox')->Subwidget('listbox')->curselection;
        (my $ssel) = $w->Subwidget('slistbox')->curselection;
        #REPLACE REMAINING LINES WITH COMMENTED CODE IF DESIRE IS TO SELECT ACTIVE IS NOTHING SELECTED (AS BEFORE).
        #IF NO SELECTION THEN:  IF NO FLAG:  undef, FLAG=0: zero(1st element), 1: active (underlined) element.
        if (defined $sel)
        {
                return int($sel);
        }
        elsif (defined($flag) && $flag)
        {
                return $w->Subwidget('slistbox')->Subwidget('listbox')->index('active') || 0;
        }
        return undef;
}
sub Popdown   # POP DOWN (ROLL UP/HIDE) THE DD-LIST BOX!
{
        my ($w, $flag) = @_;
        my ($state) = $w->cget( '-state' );
        if ($w->{'popped'})  #LISTBOX IS SHOWING:
        {
                my $c = $w->Subwidget('choices');
                $c->withdraw;
                $w->grabRelease;
                $w->{'popped'} = 0;
                $w->Subwidget('entry')->selectionRange(0,'end')  
                                unless ($w->{'-noselecttext'} || !$w->Subwidget('entry')->index('end'));
        }
        if ($w->{'savefocus'} && Tk::Exists($w->{'savefocus'}))
        {
                $w->{'savefocus'}->focus;
                delete $w->{'savefocus'};
        }
        else
        {
                $w->focus  unless ($flag);
        }
}
sub choices
{
        my $w = shift;
        unless( @_ )   #NO ARGS, RETURN CURRENT CHOICES.
        {
                return( $w->Subwidget('slistbox')->get( qw/0 end/ ) );
        }
        else           #POPULATE DROP-DOWN LIST WITH THESE CHOICES.
        {
                my $choices = shift;
                if ($choices)
                {
                        $w->delete( qw/0 end/ );
                        $w->{'hashref'} = {}  if (defined $w->{'hashref'});   #ADDED 20050125.
                        $w->{'hashref_bydesc'} = {}  if (defined $w->{'hashref_bydesc'});   #ADDED 20110226.
                        $w->insert($choices);
                        #NOOOOOOOOO! (INITIAL VARIABLE MAY NOT BE IN CHOICES)!:  $w->activate(0);
                }
                #NO WIDTH SPECIFIED, CALCULATE TEXT & LIST WIDTH BASED ON LONGEST CHOICE.
                unless ($w->{'-listwidth'})
                {
                        my @l = $w->Subwidget('slistbox')->get(0, 'end');
                        my $width = 0;
                        for (my $i=0;$i<=$#l;$i++)
                        {
                                $width = length($l[$i])  if ($width < length($l[$i]));
                        }
                        $width = $w->{'-maxwidth'}  if (defined($w->{'-maxwidth'}) 
                                        && $width > $w->{'-maxwidth'} && $w->{'-maxwidth'} > 0);
                        $w->Subwidget('entry')->configure(-width => $width);
                        $w->Subwidget('choices')->configure(-width => $width);
                        $w->Subwidget('slistbox')->configure(-width => $width);
                }
                $w->state($w->cget(-state));
                return( "" );
        }
}
# INSERT NEW ITEMS INTO DROP-DOWN LIST.
sub insert
{
        my $w = shift;
        my $pos = ($_[1]) ? shift : 'end';
        my $item = shift;            #POINTER TO OR LIST OF ITEMS TO INSERT.
        my $res;
        if (ref($item))
        {
                if (ref($item) eq 'HASH')
                {
                        my @choiceKeys = ();
                        @choiceKeys = sort { $item->{$a} cmp $item->{$b} } keys(%$item);
                        my @choiceVals = sort values(%$item);
                        $w->Subwidget('slistbox')->insert($pos, @choiceVals);
                        my $choiceHashRef = (defined $w->{'hashref'}) ? $w->{'hashref'}
                                        : {};    #ADDED 20050125.
                        my $choiceReverseHashRef = (defined $w->{'hashref_bydesc'}) ? $w->{'hashref_bydesc'}
                                        : {};    #ADDED 20110226.
                        for (my $i=0;$i<=$#choiceKeys;$i++)   #ADDED 20050125.
                        {
                                $choiceHashRef->{$choiceKeys[$i]} = $choiceVals[$i];
                                $choiceReverseHashRef->{$choiceVals[$i]} = $choiceKeys[$i];
                        }
                        $w->{'hashref_bydesc'} = $choiceReverseHashRef;
                        $w->{'hashref'} = $choiceHashRef;
                }
                else
                {
                        $res = $w->Subwidget('slistbox')->insert($pos, @$item);
                }
        }
        else
        {
                $res = $w->Subwidget('slistbox')->insert($pos, $item, @_);
        }
        #NO WIDTH SPECIFIED, (RE)CALCULATE TEXT & LIST WIDTH BASED ON LONGEST CHOICE.
        unless ($w->{'-listwidth'})
        {
                my @l = $w->Subwidget('slistbox')->get(0, 'end');
                my $width = 0;
                for (my $i=0;$i<=$#l;$i++)
                {
                        $width = length($l[$i])  if ($width < length($l[$i]));
                }
                $width = $w->{'-maxwidth'}  if (defined($w->{'-maxwidth'}) 
                                && $width > $w->{'-maxwidth'} && $w->{'-maxwidth'} > 0);
                $w->Subwidget('entry')->configure(-width => $width);
                $w->Subwidget('choices')->configure(-width => $width);
                $w->Subwidget('slistbox')->configure(-width => $width);
        }
        $w->state($w->state())  if ($res > 0);  #MAKE SURE THE BUTTON'S STATE GETS PROPERLY RESET IF LIST WAS EMPTY.
        return $res;
}
sub delete
{
        my $w = shift;
        if (defined $w->{'hashref'})   #ADDED 20050125.
        {
                my ($key, $val);
                foreach my $i (@_)
                {
                        $val = $w->get($i);
                        $key = $w->{'hashref_bydesc'}->{$val};
                        next  unless ($val);
                        delete $w->{'hashref_bydesc'}->{$val}  if (defined $w->{'hashref_bydesc'}->{$val});
                        delete $w->{'hashref'}->{$key}  if (defined $w->{'hashref'}->{$key});
                }
        }
        my $res = $w->Subwidget('slistbox')->delete(@_);
#CHGD. TO NEXT 2 @v5.0:         unless ($w->Subwidget('slistbox')->size > 0 || $w->{'mylistcmd'})
#       {
#               my $button = $w->Subwidget( 'arrow' );
#               $button->configure( -state => 'disabled', -takefocus => 0);
#       }
        $w->state($w->state())  #MAKE SURE THE BUTTON'S STATE GETS DISABLED, IF NEEDED & EMPTY LIST.
                        unless ($w->Subwidget('slistbox')->size > 0);
        return $res;
}
sub delete_byvalue
{
        my $w = shift;
        return undef  unless (@_);
        my @keys = $w->get(0, 'end');
        my $v;
        my $delThisValue;
        my $delCnt = 0;
        while (@_)
        {
                $delThisValue = shift;
                if (defined $w->{'hashref'})   #ADDED 20050125.
                {
                        for (my $k=0;$k<=$#keys;$k++)
                        {
                                if ($keys[$k] eq $delThisValue)
                                {
                                        $v = $w->{'hashref_bydesc'}->{$keys[$k]};
                                        delete $w->{'hashref_bydesc'}->{$keys[$k]}  if (defined $w->{'hashref_bydesc'}->{$keys[$k]});
                                        delete $w->{'hashref'}->{$v}  if (defined $w->{'hashref'}->{$v});
                                        $w->Subwidget('slistbox')->delete($k);
                                        $delCnt++;
                                        last;
                                }
                        }
                }
        }
        $w->state($w->state())  #MAKE SURE THE BUTTON'S STATE GETS TURNED OFF.
                        unless ($w->Subwidget('slistbox')->size > 0);
        return $delCnt;
}
sub curselection  #RETURN CURRENT LISTBOX SELECTION.
{
        return shift->Subwidget('slistbox')->curselection;
}
# CHANGE APPEARANCES BASED ON CHANGES IN "-STATE" OPTION.
sub _set_edit_state
{
        my( $w, $state ) = @_;
        $state ||= 'normal';      #JWT: HAD TO ADD THIS IN TK804...
        my $entry  = $w->Subwidget('entry');
        my $frame  = $w->Subwidget('frame');
        my $button = $w->Subwidget('arrow');
        my ($color, $txtcolor, $framehlcolor, $texthlcolor);  # MAKE ENTRY FIELDS LOOK WINDOSEY!
        unless ($w->{'-background'})
        {
                if ($bummer)   # SET BACKGROUND TO WINDOWS DEFAULTS (IF NOT SPECIFIED)
                {
                        #if ($state eq 'disabled' || $state eq 'readonly')
                        if ($state eq 'disabled')
                        {
                                $color = 'SystemButtonFace';
                        }
                        else
                        {# Not Editable
                                $color = $w->cget( '-background' );
                                $color = 'SystemWindow'  if ($color eq 'SystemButtonFace');
                        }
                        $entry->configure( -background => $color );
                }
                else   #UNIX.
                {
                        #THIS APPEARS TO FORCE THE TEXT BACKGROUND TO GREY, IF THE PALETTE 
                        #IS SOMETHING ELSE BUT USER HAS NOT SPECIFIED A BACKGROUND.
                        if ($w->cget( '-colorstate' ))  #NOT SURE WHAT POINT OF THIS IS.
                        {
                                if( $state eq 'normal' || $state =~ /text/ )
                                {# Editable
                                        $color = 'gray95';
                                }
                                else
                                {# Not Editable
                                        $color = $w->cget( -background ) || 'lightgray';
                                }
                                $entry->configure( -background => $color);
                        }
                }
        }
        $txtcolor = $w->{'-foreground'} || $w->cget( '-foreground' )  unless ($state eq 'disabled');
        $texthlcolor = $w->{'-background'} || $entry->cget( '-background' );
        $framehlcolor = $w->{'-foreground'} || $entry->cget( '-foreground' );
        if( $state eq 'readonly' )
        {
                $framehlcolor = $w->{'-foreground'} || $entry->cget( '-foreground' );
                $entry->configure( -state => 'disabled', -takefocus => 0, 
                                -foreground => $txtcolor, -highlightcolor => $texthlcolor);
                if ($bummer)
                {
                        $button->configure( -state => 'normal', -takefocus => $w->{'btntakesfocus'}, -relief => 'raised');
                        $frame->configure(-relief => ($w->{'-relief'} || 'groove'), 
                                        -takefocus => (1 & $w->{'takefocus'}), -highlightcolor => $framehlcolor);
                }
                else
                {
                        $button->configure( -state => "normal", -takefocus => $w->{'btntakesfocus'}, -relief => 'raised');
                        $frame->configure(-relief => ($w->{'-relief'} || 'raised'), 
                                        -takefocus => (1 & $w->{'takefocus'}), -highlightcolor => $framehlcolor);
                }
        }
        elsif ($state =~ /text/ )
        {
                $framehlcolor = $w->{'-background'} || 'SystemButtonFace'
                                if ($bummer);
                $button->configure( -state => "disabled", -takefocus => 0, 
                                -relief => 'flat');
                $frame->configure(-relief => ($w->{'-relief'} || 'sunken'), 
                                -takefocus => 0, -highlightcolor => $framehlcolor);
                $entry->configure( -state => 'normal', 
                                -takefocus => (1 & ($w->{'takefocus'} || $w->{'btntakesfocus'})), 
                                -foreground => $txtcolor, -highlightcolor => $texthlcolor);
        }
        elsif ($state eq "disabled" )
        {
                $entry->configure( -state => 'disabled', -takefocus => 0, 
                                -foreground => ($button->cget('-disabledforeground')||'gray30'), -highlightcolor => $texthlcolor);
                                #-foreground => 'gray30', -highlightcolor => $texthlcolor);
                if ($bummer)
                {
                        $framehlcolor = $w->{'-background'} || 'SystemButtonFace';
                        $button->configure(-state => 'disabled',  -takefocus => 0, 
                                        -relief => 'flat');
                        $frame->configure(-relief => ($w->{'-relief'} || 'sunken'), 
                                        -takefocus => 0, -highlightcolor => $framehlcolor);
                }
                else
                {
                        $frame->configure(-relief => ($w->{'-relief'} || 'groove'), 
                                        -takefocus => 0, -highlightcolor => $framehlcolor);
                }
                $button->configure(-state => 'disabled',  -takefocus => 0, 
                                -relief => 'raised');
        }
        else   #NORMAL.
        {
                $framehlcolor = $w->{'-background'} || 'SystemButtonFace'
                                if ($bummer);
                #$entry->configure( -state => $state, -takefocus => (1 & $w->{'takefocus'}), 
                $entry->configure( -state => $state, -takefocus => 0, 
                                -foreground => $txtcolor, -highlightcolor => $texthlcolor);
                $button->configure( -state => $state, -relief => 'raised', 
                                -takefocus => $w->{'btntakesfocus'});
                $frame->configure(-relief => ($w->{'-relief'} || 'sunken'), 
                                -takefocus => (1 & $w->{'takefocus'}), 
                                -highlightcolor => $framehlcolor);
        }
        $entry->configure( -background => $w->{'-textbackground'})  if ($w->{'-textbackground'});
        $entry->configure( -foreground => $w->{'-textforeground'})  if ($w->{'-textforeground'});
        $button->configure( -state => 'disabled', -takefocus => 0)  #DISABLE BUTTON IF EMPTY LIST.
                        unless ($w->Subwidget('slistbox')->size > 0)
}
sub state
{
        my $w = shift;
        if (@_)
        {
                my $state = shift;
                $w->{'Configure'}{'-state'} = $state;
                $w->_set_edit_state($state);
        }
        else
        {
                return $w->{'Configure'}{'-state'};
        }
}
sub _max
{
        my $max = shift;
        foreach my $val (@_)
        {
                $max = $val if $max < $val;
        }
        return( $max );
}
sub dereference   #USER-CALLABLE FUNCTION, ADDED 20050125.
{
        my $w = shift;
        return undef  unless (defined $_[0]);
        my $userValue = shift;
        return (defined($w->{'hashref_bydesc'}) && defined($w->{'hashref_bydesc'}->{$userValue}))
                        ? $w->{'hashref_bydesc'}->{$userValue} : $userValue;
}
sub dereferenceOnly   #USER-CALLABLE FUNCTION, ADDED 20050125.
{
        my $w = shift;
        return undef  unless (defined $_[0]);
        my $userValue = shift;
        return (defined($w->{'hashref_bydesc'}) && defined($w->{'hashref_bydesc'}->{$userValue}))
                        ? $w->{'hashref_bydesc'}->{$userValue} : undef;
}
sub reference   #USER-CALLABLE FUNCTION, ADDED 20110227, v. 4.8:
{
        my $w = shift;
        return undef  unless (defined $_[0]);
        my $userValue = shift;
        return (defined($w->{'hashref'}) && defined($w->{'hashref'}->{$userValue}))
                        ? $w->{'hashref'}->{$userValue} : $userValue;
}
sub hasreference   #USER-CALLABLE FUNCTION, ADDED 20050125.
{
        my $w = shift;
        return undef  unless (defined $_[0]);
        my $userValue = shift;
        return (defined($w->{'hashref_bydesc'}) && defined($w->{'hashref_bydesc'}->{$userValue}))
                        ? 1 : 0;
}
sub get_hashref_byname   #USER-CALLABLE FUNCTION, ADDED 20110227, v. 4.8:
{
        my $w = shift;
        return (defined $w->{'hashref_bydesc'}) ? $w->{'hashref_bydesc'} : undef;
}
sub fetchhash   #DEPRECIATED, RENAMED get_hashref_byname():
{
        my $w = shift;
        return $w->get_hashref_byname;
}
sub get_hashref_byvalue   #USER-CALLABLE FUNCTION, ADDED 20110227, v. 4.8:
{
        my $w = shift;
        return (defined $w->{'hashref'}) ? $w->{'hashref'} : undef;
}
sub get    #USER-CALLABLE FUNCTION, ADDED 20090210 v4.72 (returns DISPLAYED VALUE for choice hashes)!
{
        my $w = shift;
        if ( @_ )   #NO ARGS, RETURN CURRENT CHOICES.
        {
                return $w->Subwidget('slistbox')->get( @_ );
        }
        else           #RETURN CHOICES:
        {
                my $var_ref = $w->cget( '-textvariable' );
                return $$var_ref;
        }
}
sub get_index    #USER-CALLABLE FUNCTION, ADDED 20110227, v. 4.8:
{
        my $w = shift;
        return undef  unless (@_);
        my $val = shift;
        my @keys = $w->get(0, 'end');
        for (my $k=0;$k<=$#keys;$k++)
        {
                return $k  if ($keys[$k] eq $val);
        }
        return undef;
}
sub activate    #USER-CALLABLE FUNCTION, ADDED 20090210 v4.72
{
        my $w = shift;
        my $indx = shift;
        my $res = $w->Subwidget('slistbox')->Subwidget('listbox')->activate($indx);
no strict 'refs';
        my $var_ref = $w->cget( '-textvariable' );
        $$var_ref = $w->Subwidget('slistbox')->Subwidget('listbox')->get($indx);
        return $res;
}
sub index
{
        my $w = shift;
        return $w->Subwidget('slistbox')->Subwidget('listbox')->index(@_);
}
sub size
{
        my $w = shift;
        return $w->Subwidget('slistbox')->Subwidget('listbox')->size(@_);
}
sub get_icursor
{
        my $w = shift;
        return $w->Subwidget('entry')->index(@_)  if (@_);
        return $w->Subwidget('entry')->index('insert');
}
1
__END__