summaryrefslogtreecommitdiff
path: root/Master/tlpkg/tlperl/lib/Tk/Listbox.pm
diff options
context:
space:
mode:
Diffstat (limited to 'Master/tlpkg/tlperl/lib/Tk/Listbox.pm')
-rw-r--r--Master/tlpkg/tlperl/lib/Tk/Listbox.pm910
1 files changed, 910 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl/lib/Tk/Listbox.pm b/Master/tlpkg/tlperl/lib/Tk/Listbox.pm
new file mode 100644
index 00000000000..c73c0c193a4
--- /dev/null
+++ b/Master/tlpkg/tlperl/lib/Tk/Listbox.pm
@@ -0,0 +1,910 @@
+# Converted from listbox.tcl --
+#
+# This file defines the default bindings for Tk listbox widgets.
+#
+# @(#) listbox.tcl 1.7 94/12/17 16:05:18
+#
+# Copyright (c) 1994 The Regents of the University of California.
+# Copyright (c) 1994 Sun Microsystems, Inc.
+#
+# See the file "license.terms" for information on usage and redistribution
+# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+
+# Modifications from standard Listbox.pm
+# --------------------------------------
+# 27-JAN-2001 Alasdair Allan
+# Modified for local use by adding tied scalar and arrays
+# Implemented TIESCALAR, TIEARRAY, FETCH, FETCHSIZE, STORE, CLEAR & EXTEND
+# 31-JAN-2001 Alasdair Allan
+# Made changes suggested by Tim Jenness
+# 03-FEB-2001 Alasdair Allan
+# Modified STORE for tied scalars to clear and select elements
+# 06-FEB-2001 Alasdair Allan
+# Added POD documentation for tied listbox
+# 13-FEB-2001 Alasdair Allan
+# Implemented EXISTS, DELETE, PUSH, POP, SHIFT & UNSHIFT for tied arrays
+# 14-FEB-2001 Alasdair Allan
+# Implemented SPLICE for tied arrays, all tied functionality in place
+# 16-FEB-2001 Alasdair Allan
+# Tweak to STORE interface for tied scalars
+# 23-FEB-2001 Alasdair Allan
+# Added flag to FETCH for tied scalars, modified to return hashes
+# 24-FEB-2001 Alasdair Allan
+# Updated Pod documentation
+#
+
+package Tk::Listbox;
+
+use vars qw($VERSION @Selection $Prev);
+use strict;
+$VERSION = '4.015'; # sprintf '4.%03d', q$Revision: #14 $ =~ /\D(\d+)\s*$/;
+
+use Tk qw(Ev $XS_VERSION);
+use Tk::Clipboard ();
+use AutoLoader;
+
+use base qw(Tk::Clipboard Tk::Widget);
+
+Construct Tk::Widget 'Listbox';
+
+bootstrap Tk::Listbox;
+
+sub Tk_cmd { \&Tk::listbox }
+
+Tk::Methods('activate','bbox','curselection','delete','get','index',
+ 'insert','itemcget','itemconfigure','nearest','scan','see',
+ 'selection','size','xview','yview');
+
+use Tk::Submethods ( 'selection' => [qw(anchor clear includes set)],
+ 'scan' => [qw(mark dragto)],
+ 'xview' => [qw(moveto scroll)],
+ 'yview' => [qw(moveto scroll)],
+ );
+
+*Getselected = \&getSelected;
+
+sub clipEvents
+{
+ return qw[Copy];
+}
+
+sub BalloonInfo
+{
+ my ($listbox,$balloon,$X,$Y,@opt) = @_;
+ my $e = $listbox->XEvent;
+ return if !$e;
+ my $index = $listbox->index('@' . $e->x . ',' . $e->y);
+ foreach my $opt (@opt)
+ {
+ my $info = $balloon->GetOption($opt,$listbox);
+ if ($opt =~ /^-(statusmsg|balloonmsg)$/ && UNIVERSAL::isa($info,'ARRAY'))
+ {
+ $balloon->Subclient($index);
+ if (defined $info->[$index])
+ {
+ return $info->[$index];
+ }
+ return '';
+ }
+ return $info;
+ }
+}
+
+sub ClassInit
+{
+ my ($class,$mw) = @_;
+ $class->SUPER::ClassInit($mw);
+ # Standard Motif bindings:
+ $mw->bind($class,'<1>',[sub {
+ my $w = shift;
+ if (Tk::Exists($w)) {
+ $w->BeginSelect(@_);
+ }
+ }, Ev('index',Ev('@'))]);
+ $mw->bind($class, '<Double-1>' => \&Tk::NoOp);
+ $mw->bind($class,'<B1-Motion>',['Motion',Ev('index',Ev('@'))]);
+ $mw->bind($class,'<ButtonRelease-1>','ButtonRelease_1');
+ ;
+ $mw->bind($class,'<Shift-1>',['BeginExtend',Ev('index',Ev('@'))]);
+ $mw->bind($class,'<Control-1>',['BeginToggle',Ev('index',Ev('@'))]);
+
+ $mw->bind($class,'<B1-Leave>',['AutoScan',Ev('x'),Ev('y')]);
+ $mw->bind($class,'<B1-Enter>','CancelRepeat');
+ $mw->bind($class,'<Up>',['UpDown',-1]);
+ $mw->bind($class,'<Shift-Up>',['ExtendUpDown',-1]);
+ $mw->bind($class,'<Down>',['UpDown',1]);
+ $mw->bind($class,'<Shift-Down>',['ExtendUpDown',1]);
+
+ $mw->XscrollBind($class);
+ $mw->bind($class,'<Prior>', sub {
+ my $w = shift;
+ $w->yview('scroll',-1,'pages');
+ $w->activate('@0,0');
+ });
+ $mw->bind($class,'<Next>', sub {
+ my $w = shift;
+ $w->yview('scroll',1,'pages');
+ $w->activate('@0,0');
+ });
+ $mw->bind($class,'<Control-Prior>', ['xview', 'scroll', -1, 'pages']);
+ $mw->bind($class,'<Control-Next>', ['xview', 'scroll', 1, 'pages']);
+ # <Home> and <End> defined in XscrollBind
+ $mw->bind($class,'<Control-Home>','Cntrl_Home');
+ ;
+ $mw->bind($class,'<Shift-Control-Home>',['DataExtend',0]);
+ $mw->bind($class,'<Control-End>','Cntrl_End');
+ ;
+ $mw->bind($class,'<Shift-Control-End>',['DataExtend','end']);
+ # XXX What about <<Copy>>? Already handled in Tk::Clipboard?
+ # $class->clipboardOperations($mw,'Copy');
+ $mw->bind($class,'<space>',['BeginSelect',Ev('index','active')]);
+ $mw->bind($class,'<Select>',['BeginSelect',Ev('index','active')]);
+ $mw->bind($class,'<Control-Shift-space>',['BeginExtend',Ev('index','active')]);
+ $mw->bind($class,'<Shift-Select>',['BeginExtend',Ev('index','active')]);
+ $mw->bind($class,'<Escape>','Cancel');
+ $mw->bind($class,'<Control-slash>','SelectAll');
+ $mw->bind($class,'<Control-backslash>','Cntrl_backslash');
+ ;
+ # Additional Tk bindings that aren't part of the Motif look and feel:
+ $mw->bind($class,'<2>',['scan','mark',Ev('x'),Ev('y')]);
+ $mw->bind($class,'<B2-Motion>',['scan','dragto',Ev('x'),Ev('y')]);
+
+ $mw->MouseWheelBind($class); # XXX Both needed?
+ $mw->YMouseWheelBind($class);
+ return $class;
+}
+
+1;
+__END__
+
+sub TIEARRAY {
+ my ( $class, $obj, %options ) = @_;
+ return bless {
+ OBJECT => \$obj,
+ OPTION => \%options }, $class;
+}
+
+
+
+sub TIESCALAR {
+ my ( $class, $obj, %options ) = @_;
+ return bless {
+ OBJECT => \$obj,
+ OPTION => \%options }, $class;
+}
+
+# FETCH
+# -----
+# Return either the full contents or only the selected items in the
+# box depending on whether we tied it to an array or scalar respectively
+sub FETCH {
+ my $class = shift;
+
+ my $self = ${$class->{OBJECT}};
+ my %options = %{$class->{OPTION}} if defined $class->{OPTION};;
+
+ # Define the return variable
+ my $result;
+
+ # Check whether we are have a tied array or scalar quantity
+ if ( @_ ) {
+ my $i = shift;
+ # The Tk:: Listbox has been tied to an array, we are returning
+ # an array list of the current items in the Listbox
+ $result = $self->get($i);
+ } else {
+ # The Tk::Listbox has been tied to a scalar, we are returning a
+ # reference to an array or hash containing the currently selected items
+ my ( @array, %hash );
+
+ if ( defined $options{ReturnType} ) {
+
+ # THREE-WAY SWITCH
+ if ( $options{ReturnType} eq "index" ) {
+ $result = [$self->curselection];
+ } elsif ( $options{ReturnType} eq "element" ) {
+ foreach my $selection ( $self->curselection ) {
+ push(@array,$self->get($selection)); }
+ $result = \@array;
+ } elsif ( $options{ReturnType} eq "both" ) {
+ foreach my $selection ( $self->curselection ) {
+ %hash = ( %hash, $selection => $self->get($selection)); }
+ $result = \%hash;
+ }
+ } else {
+ # return elements (default)
+ foreach my $selection ( $self->curselection ) {
+ push(@array,$self->get($selection)); }
+ $result = \@array;
+ }
+ }
+ return $result;
+}
+
+# FETCHSIZE
+# ---------
+# Return the number of elements in the Listbox when tied to an array
+sub FETCHSIZE {
+ my $class = shift;
+ return ${$class->{OBJECT}}->size();
+}
+
+# STORE
+# -----
+# If tied to an array we will modify the Listbox contents, while if tied
+# to a scalar we will select and clear elements.
+sub STORE {
+
+ if ( scalar(@_) == 2 ) {
+ # we have a tied scalar
+ my ( $class, $selected ) = @_;
+ my $self = ${$class->{OBJECT}};
+ my %options = %{$class->{OPTION}} if defined $class->{OPTION};;
+
+ # clear currently selected elements
+ $self->selectionClear(0,'end');
+
+ # set selected elements
+ if ( defined $options{ReturnType} ) {
+
+ # THREE-WAY SWITCH
+ if ( $options{ReturnType} eq "index" ) {
+ for ( my $i=0; $i < scalar(@$selected) ; $i++ ) {
+ for ( my $j=0; $j < $self->size() ; $j++ ) {
+ if( $j == $$selected[$i] ) {
+ $self->selectionSet($j); last; }
+ }
+ }
+ } elsif ( $options{ReturnType} eq "element" ) {
+ for ( my $k=0; $k < scalar(@$selected) ; $k++ ) {
+ for ( my $l=0; $l < $self->size() ; $l++ ) {
+ if( $self->get($l) eq $$selected[$k] ) {
+ $self->selectionSet($l); last; }
+ }
+ }
+ } elsif ( $options{ReturnType} eq "both" ) {
+ foreach my $key ( keys %$selected ) {
+ $self->selectionSet($key)
+ if $$selected{$key} eq $self->get($key);
+ }
+ }
+ } else {
+ # return elements (default)
+ for ( my $k=0; $k < scalar(@$selected) ; $k++ ) {
+ for ( my $l=0; $l < $self->size() ; $l++ ) {
+ if( $self->get($l) eq $$selected[$k] ) {
+ $self->selectionSet($l); last; }
+ }
+ }
+ }
+
+ } else {
+ # we have a tied array
+ my ( $class, $index, $value ) = @_;
+ my $self = ${$class->{OBJECT}};
+
+ # check size of current contents list
+ my $sizeof = $self->size();
+
+ if ( $index <= $sizeof ) {
+ # Change a current listbox entry
+ $self->delete($index);
+ $self->insert($index, $value);
+ } else {
+ # Add a new value
+ if ( defined $index ) {
+ $self->insert($index, $value);
+ } else {
+ $self->insert("end", $value);
+ }
+ }
+ }
+}
+
+# CLEAR
+# -----
+# Empty the Listbox of contents if tied to an array
+sub CLEAR {
+ my $class = shift;
+ ${$class->{OBJECT}}->delete(0, 'end');
+}
+
+# EXTEND
+# ------
+# Do nothing and be happy about it
+sub EXTEND { }
+
+# PUSH
+# ----
+# Append elements onto the Listbox contents
+sub PUSH {
+ my ( $class, @list ) = @_;
+ ${$class->{OBJECT}}->insert('end', @list);
+}
+
+# POP
+# ---
+# Remove last element of the array and return it
+sub POP {
+ my $class = shift;
+
+ my $value = ${$class->{OBJECT}}->get('end');
+ ${$class->{OBJECT}}->delete('end');
+ return $value;
+}
+
+# SHIFT
+# -----
+# Removes the first element and returns it
+sub SHIFT {
+ my $class = shift;
+
+ my $value = ${$class->{OBJECT}}->get(0);
+ ${$class->{OBJECT}}->delete(0);
+ return $value
+}
+
+# UNSHIFT
+# -------
+# Insert elements at the beginning of the Listbox
+sub UNSHIFT {
+ my ( $class, @list ) = @_;
+ ${$class->{OBJECT}}->insert(0, @list);
+}
+
+# DELETE
+# ------
+# Delete element at specified index
+sub DELETE {
+ my ( $class, @list ) = @_;
+
+ my $value = ${$class->{OBJECT}}->get(@list);
+ ${$class->{OBJECT}}->delete(@list);
+ return $value;
+}
+
+# EXISTS
+# ------
+# Returns true if the index exist, and undef if not
+sub EXISTS {
+ my ( $class, $index ) = @_;
+ return undef unless ${$class->{OBJECT}}->get($index);
+}
+
+# SPLICE
+# ------
+# Performs equivalent of splice on the listbox contents
+sub SPLICE {
+ my $class = shift;
+
+ my $self = ${$class->{OBJECT}};
+
+ # check for arguments
+ my @elements;
+ if ( scalar(@_) == 0 ) {
+ # none
+ @elements = $self->get(0,'end');
+ $self->delete(0,'end');
+ return wantarray ? @elements : $elements[scalar(@elements)-1];;
+
+ } elsif ( scalar(@_) == 1 ) {
+ # $offset
+ my ( $offset ) = @_;
+ if ( $offset < 0 ) {
+ my $start = $self->size() + $offset;
+ if ( $start > 0 ) {
+ @elements = $self->get($start,'end');
+ $self->delete($start,'end');
+ return wantarray ? @elements : $elements[scalar(@elements)-1];
+ } else {
+ return undef;
+ }
+ } else {
+ @elements = $self->get($offset,'end');
+ $self->delete($offset,'end');
+ return wantarray ? @elements : $elements[scalar(@elements)-1];
+ }
+
+ } elsif ( scalar(@_) == 2 ) {
+ # $offset and $length
+ my ( $offset, $length ) = @_;
+ if ( $offset < 0 ) {
+ my $start = $self->size() + $offset;
+ my $end = $self->size() + $offset + $length - 1;
+ if ( $start > 0 ) {
+ @elements = $self->get($start,$end);
+ $self->delete($start,$end);
+ return wantarray ? @elements : $elements[scalar(@elements)-1];
+ } else {
+ return undef;
+ }
+ } else {
+ @elements = $self->get($offset,$offset+$length-1);
+ $self->delete($offset,$offset+$length-1);
+ return wantarray ? @elements : $elements[scalar(@elements)-1];
+ }
+
+ } else {
+ # $offset, $length and @list
+ my ( $offset, $length, @list ) = @_;
+ if ( $offset < 0 ) {
+ my $start = $self->size() + $offset;
+ my $end = $self->size() + $offset + $length - 1;
+ if ( $start > 0 ) {
+ @elements = $self->get($start,$end);
+ $self->delete($start,$end);
+ $self->insert($start,@list);
+ return wantarray ? @elements : $elements[scalar(@elements)-1];
+ } else {
+ return undef;
+ }
+ } else {
+ @elements = $self->get($offset,$offset+$length-1);
+ $self->delete($offset,$offset+$length-1);
+ $self->insert($offset,@list);
+ return wantarray ? @elements : $elements[scalar(@elements)-1];
+ }
+ }
+}
+
+# ----
+
+#
+# Bind --
+# This procedure is invoked the first time the mouse enters a listbox
+# widget or a listbox widget receives the input focus. It creates
+# all of the class bindings for listboxes.
+#
+# Arguments:
+# event - Indicates which event caused the procedure to be invoked
+# (Enter or FocusIn). It is used so that we can carry out
+# the functions of that event in addition to setting up
+# bindings.
+
+sub xyIndex
+{
+ my $w = shift;
+ my $Ev = $w->XEvent;
+ return $w->index($Ev->xy);
+}
+
+sub ButtonRelease_1
+{
+ my $w = shift;
+ my $Ev = $w->XEvent;
+ $w->CancelRepeat;
+ $w->activate($Ev->xy);
+}
+
+
+sub Cntrl_Home
+{
+ my $w = shift;
+ my $Ev = $w->XEvent;
+ $w->activate(0);
+ $w->see(0);
+ $w->selectionClear(0,'end');
+ $w->selectionSet(0);
+ $w->eventGenerate("<<ListboxSelect>>");
+}
+
+
+sub Cntrl_End
+{
+ my $w = shift;
+ my $Ev = $w->XEvent;
+ $w->activate('end');
+ $w->see('end');
+ $w->selectionClear(0,'end');
+ $w->selectionSet('end');
+ $w->eventGenerate("<<ListboxSelect>>");
+}
+
+
+sub Cntrl_backslash
+{
+ my $w = shift;
+ my $Ev = $w->XEvent;
+ if ($w->cget('-selectmode') ne 'browse')
+ {
+ $w->selectionClear(0,'end');
+ $w->eventGenerate("<<ListboxSelect>>");
+ }
+}
+
+# BeginSelect --
+#
+# This procedure is typically invoked on button-1 presses. It begins
+# the process of making a selection in the listbox. Its exact behavior
+# depends on the selection mode currently in effect for the listbox;
+# see the Motif documentation for details.
+#
+# Arguments:
+# w - The listbox widget.
+# el - The element for the selection operation (typically the
+# one under the pointer). Must be in numerical form.
+sub BeginSelect
+{
+ my $w = shift;
+ my $el = shift;
+ if ($w->cget('-selectmode') eq 'multiple')
+ {
+ if ($w->selectionIncludes($el))
+ {
+ $w->selectionClear($el)
+ }
+ else
+ {
+ $w->selectionSet($el)
+ }
+ }
+ else
+ {
+ $w->selectionClear(0,'end');
+ $w->selectionSet($el);
+ $w->selectionAnchor($el);
+ @Selection = ();
+ $Prev = $el
+ }
+ $w->focus if ($w->cget('-takefocus'));
+ $w->eventGenerate("<<ListboxSelect>>");
+}
+# Motion --
+#
+# This procedure is called to process mouse motion events while
+# button 1 is down. It may move or extend the selection, depending
+# on the listbox's selection mode.
+#
+# Arguments:
+# w - The listbox widget.
+# el - The element under the pointer (must be a number).
+sub Motion
+{
+ my $w = shift;
+ my $el = shift;
+ if (defined($Prev) && $el == $Prev)
+ {
+ return;
+ }
+ my $anchor = $w->index('anchor');
+ my $mode = $w->cget('-selectmode');
+ if ($mode eq 'browse')
+ {
+ $w->selectionClear(0,'end');
+ $w->selectionSet($el);
+ $Prev = $el;
+ $w->eventGenerate("<<ListboxSelect>>");
+ }
+ elsif ($mode eq 'extended')
+ {
+ my $i = $Prev;
+ if (!defined $i || $i eq '')
+ {
+ $i = $el;
+ $w->selectionSet($el);
+ }
+ if ($w->selectionIncludes('anchor'))
+ {
+ $w->selectionClear($i,$el);
+ $w->selectionSet('anchor',$el)
+ }
+ else
+ {
+ $w->selectionClear($i,$el);
+ $w->selectionClear('anchor',$el)
+ }
+ if (!@Selection)
+ {
+ @Selection = $w->curselection;
+ }
+ while ($i < $el && $i < $anchor)
+ {
+ if (Tk::lsearch(\@Selection,$i) >= 0)
+ {
+ $w->selectionSet($i)
+ }
+ $i++
+ }
+ while ($i > $el && $i > $anchor)
+ {
+ if (Tk::lsearch(\@Selection,$i) >= 0)
+ {
+ $w->selectionSet($i)
+ }
+ $i--
+ }
+ $Prev = $el;
+ $w->eventGenerate("<<ListboxSelect>>");
+ }
+}
+# BeginExtend --
+#
+# This procedure is typically invoked on shift-button-1 presses. It
+# begins the process of extending a selection in the listbox. Its
+# exact behavior depends on the selection mode currently in effect
+# for the listbox; see the Motif documentation for details.
+#
+# Arguments:
+# w - The listbox widget.
+# el - The element for the selection operation (typically the
+# one under the pointer). Must be in numerical form.
+sub BeginExtend
+{
+ my $w = shift;
+ my $el = shift;
+ if ($w->cget('-selectmode') eq 'extended' && $w->selectionIncludes('anchor'))
+ {
+ $w->Motion($el)
+ }
+ else
+ {
+ # No selection yet; simulate the begin-select operation.
+ $w->BeginSelect($el);
+ }
+}
+# BeginToggle --
+#
+# This procedure is typically invoked on control-button-1 presses. It
+# begins the process of toggling a selection in the listbox. Its
+# exact behavior depends on the selection mode currently in effect
+# for the listbox; see the Motif documentation for details.
+#
+# Arguments:
+# w - The listbox widget.
+# el - The element for the selection operation (typically the
+# one under the pointer). Must be in numerical form.
+sub BeginToggle
+{
+ my $w = shift;
+ my $el = shift;
+ if ($w->cget('-selectmode') eq 'extended')
+ {
+ @Selection = $w->curselection();
+ $Prev = $el;
+ $w->selectionAnchor($el);
+ if ($w->selectionIncludes($el))
+ {
+ $w->selectionClear($el)
+ }
+ else
+ {
+ $w->selectionSet($el)
+ }
+ $w->eventGenerate("<<ListboxSelect>>");
+ }
+}
+# AutoScan --
+# This procedure is invoked when the mouse leaves an entry window
+# with button 1 down. It scrolls the window up, down, left, or
+# right, depending on where the mouse left the window, and reschedules
+# itself as an "after" command so that the window continues to scroll until
+# the mouse moves back into the window or the mouse button is released.
+#
+# Arguments:
+# w - The entry window.
+# x - The x-coordinate of the mouse when it left the window.
+# y - The y-coordinate of the mouse when it left the window.
+sub AutoScan
+{
+ my $w = shift;
+ return if !Tk::Exists($w);
+ my $x = shift;
+ my $y = shift;
+ if ($y >= $w->height)
+ {
+ $w->yview('scroll',1,'units')
+ }
+ elsif ($y < 0)
+ {
+ $w->yview('scroll',-1,'units')
+ }
+ elsif ($x >= $w->width)
+ {
+ $w->xview('scroll',2,'units')
+ }
+ elsif ($x < 0)
+ {
+ $w->xview('scroll',-2,'units')
+ }
+ else
+ {
+ return;
+ }
+ $w->Motion($w->index("@" . $x . ',' . $y));
+ $w->RepeatId($w->after(50,'AutoScan',$w,$x,$y));
+}
+# UpDown --
+#
+# Moves the location cursor (active element) up or down by one element,
+# and changes the selection if we're in browse or extended selection
+# mode.
+#
+# Arguments:
+# w - The listbox widget.
+# amount - +1 to move down one item, -1 to move back one item.
+sub UpDown
+{
+ my $w = shift;
+ my $amount = shift;
+ $w->activate($w->index('active')+$amount);
+ $w->see('active');
+ my $mode = $w->cget('-selectmode');
+ if ($mode eq 'browse')
+ {
+ $w->selectionClear(0,'end');
+ $w->selectionSet('active');
+ $w->eventGenerate("<<ListboxSelect>>");
+ }
+ elsif ($mode eq 'extended')
+ {
+ $w->selectionClear(0,'end');
+ $w->selectionSet('active');
+ $w->selectionAnchor('active');
+ $Prev = $w->index('active');
+ @Selection = ();
+ $w->eventGenerate("<<ListboxSelect>>");
+ }
+}
+# ExtendUpDown --
+#
+# Does nothing unless we're in extended selection mode; in this
+# case it moves the location cursor (active element) up or down by
+# one element, and extends the selection to that point.
+#
+# Arguments:
+# w - The listbox widget.
+# amount - +1 to move down one item, -1 to move back one item.
+sub ExtendUpDown
+{
+ my $w = shift;
+ my $amount = shift;
+ if ($w->cget('-selectmode') ne 'extended')
+ {
+ return;
+ }
+ my $active = $w->index('active');
+ if (!@Selection)
+ {
+ $w->selectionSet($active);
+ @Selection = $w->curselection;
+ }
+ $w->activate($active + $amount);
+ $w->see('active');
+ $w->Motion($w->index('active'))
+}
+# DataExtend
+#
+# This procedure is called for key-presses such as Shift-KEndData.
+# If the selection mode isn't multiple or extend then it does nothing.
+# Otherwise it moves the active element to el and, if we're in
+# extended mode, extends the selection to that point.
+#
+# Arguments:
+# w - The listbox widget.
+# el - An integer element number.
+sub DataExtend
+{
+ my $w = shift;
+ my $el = shift;
+ my $mode = $w->cget('-selectmode');
+ if ($mode eq 'extended')
+ {
+ $w->activate($el);
+ $w->see($el);
+ if ($w->selectionIncludes('anchor'))
+ {
+ $w->Motion($el)
+ }
+ }
+ elsif ($mode eq 'multiple')
+ {
+ $w->activate($el);
+ $w->see($el)
+ }
+}
+# Cancel
+#
+# This procedure is invoked to cancel an extended selection in
+# progress. If there is an extended selection in progress, it
+# restores all of the items between the active one and the anchor
+# to their previous selection state.
+#
+# Arguments:
+# w - The listbox widget.
+sub Cancel
+{
+ my $w = shift;
+ if ($w->cget('-selectmode') ne 'extended' || !defined $Prev)
+ {
+ return;
+ }
+ my $first = $w->index('anchor');
+ my $last = $Prev;
+ if ($first > $last)
+ {
+ ($first, $last) = ($last, $first);
+ }
+ $w->selectionClear($first,$last);
+ while ($first <= $last)
+ {
+ if (Tk::lsearch(\@Selection,$first) >= 0)
+ {
+ $w->selectionSet($first)
+ }
+ $first++
+ }
+ $w->eventGenerate("<<ListboxSelect>>");
+}
+# SelectAll
+#
+# This procedure is invoked to handle the "select all" operation.
+# For single and browse mode, it just selects the active element.
+# Otherwise it selects everything in the widget.
+#
+# Arguments:
+# w - The listbox widget.
+sub SelectAll
+{
+ my $w = shift;
+ my $mode = $w->cget('-selectmode');
+ if ($mode eq 'single' || $mode eq 'browse')
+ {
+ $w->selectionClear(0,'end');
+ $w->selectionSet('active')
+ }
+ else
+ {
+ $w->selectionSet(0,'end')
+ }
+ $w->eventGenerate("<<ListboxSelect>>");
+}
+
+# Perl/Tk extensions:
+sub SetList
+{
+ my $w = shift;
+ $w->delete(0,'end');
+ $w->insert('end',@_);
+}
+
+sub deleteSelected
+{
+ my $w = shift;
+ my $i;
+ foreach $i (reverse $w->curselection)
+ {
+ $w->delete($i);
+ }
+}
+
+sub clipboardPaste
+{
+ my $w = shift;
+ my $index = $w->index('active') || $w->index($w->XEvent->xy);
+ my $str;
+ eval {local $SIG{__DIE__}; $str = $w->clipboardGet };
+ return if $@;
+ foreach (split("\n",$str))
+ {
+ $w->insert($index++,$_);
+ }
+}
+
+sub getSelected
+{
+ my ($w) = @_;
+ my $i;
+ my (@result) = ();
+ foreach $i ($w->curselection)
+ {
+ push(@result,$w->get($i));
+ }
+ return (wantarray) ? @result : $result[0];
+}
+
+
+
+1;
+__END__
+
+