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-# Copyright (c) 2000 Jeffrey Hobbs.
-# Copyright (c) 2000 Ajuba Solutions.
-# See the file "license.terms" for information on usage and redistribution
-# of this file, and for a DISCLAIMER OF ALL WARRANTIES.
-# RCS: @(#) $Id: spinbox.n,v 1.3 2001/12/18 23:02:35 hobbs Exp $
-
-=head1 NAME
-
-Tk::Spinbox - Create and manipulate Spinbox widgets
-
-=for category Tk Generic Methods
-
-=head1 SYNOPSIS
-
-I<$spinbox> = I<$parent>-E<gt>Spinbox(?I<options>?);
-
- -activebackground -highlightthickness -repeatinterval
- -background -insertbackground -selectbackground
- -borderwidth -insertborderwidth -selectborderwidth
- -cursor -insertontime -selectforeground
- -exportselection -insertwidth -takefocus
- -font -insertofftime -textvariable
- -foreground -justify -xscrollcommand
- -highlightbackground -relief
- -highlightcolor -repeatdelay
-
-=head1 WIDGET-SPECIFIC OPTIONS
-
-=over 4
-
-=item Option: B<-buttonbackground>
-
-=item Name: B<buttonBackground>
-
-=item Class: B<Background>
-
-The background color to be used for the spin buttons.
-
-=item Option: B<-buttoncursor>
-
-=item Name: B<buttonCursor>
-
-=item Class: B<Cursor>
-
-The cursor to be used when over the spin buttons. If this is empty
-(the default), a default cursor will be used.
-
-=item Option: B<-buttondownrelief>
-
-=item Name: B<buttonDownRelief>
-
-=item Class: B<Relief>
-
-The relief to be used for the upper spin button.
-
-=item Option: B<-buttonuprelief>
-
-=item Name: B<buttonUpRelief>
-
-=item Class: B<Relief>
-
-The relief to be used for the lower spin button.
-
-=item Option: B<-command>
-
-=item Name: B<command>
-
-=item Class: B<Command>
-
-Specifies a Perl/Tk callback to invoke whenever a Spinbutton is invoked.
-The callback has these two arguments I<appended> to any existing callback
-arguments: the current value of the widget and the direction of the button
-press (B<up> or B<down>).
-
-=item Option: B<-disabledbackground>
-
-=item Name: B<disabledBackground>
-
-=item Class: B<DisabledBackground>
-
-Specifies the background color to use when the Spinbox is disabled. If
-this option is the empty string, the normal background color is used.
-
-=item Option: B<-disabledforeground>
-
-=item Name: B<disabledForeground>
-
-=item Class: B<DisabledForeground>
-
-Specifies the foreground color to use when the Spinbox is disabled. If
-this option is the empty string, the normal foreground color is used.
-
-=item Option: B<-format>
-
-=item Name: B<format>
-
-=item Class: B<Format>
-
-Specifies an alternate format to use when setting the string value
-when using the B<-from> and B<-to> range.
-This must be a format specifier of the form B<%E<lt>padE<gt>.E<lt>padE<gt>f>,
-as it will format a floating-point number.
-
-=item Option: B<-from>
-
-=item Name: B<from>
-
-=item Class: B<From>
-
-A floating-point value corresponding to the lowest value for a Spinbox, to
-be used in conjunction with B<-to> and B<-increment>. When all
-are specified correctly, the Spinbox will use these values to control its
-contents. This value must be less than the B<-to> option.
-If B<-values> is specified, it supercedes this option.
-
-=item Option: B<-invalidcommand>
-
-=item Alias: B<-invcmd>
-
-=item Name: B<invalidCommand>
-
-=item Class: B<InvalidCommand>
-
-Specifies a script to eval when B<validateCommand> returns 0. Setting
-it to an empty string disables this feature (the default). The best use of
-this option is to set it to I<bell>. See B<Validation> below for
-more information.
-
-=item Option: B<-increment>
-
-=item Name: B<increment>
-
-=item Class: B<Increment>
-
-A floating-point value specifying the increment. When used with
-B<-from> and B<-to>, the value in the widget will be adjusted by
-B<-increment> when a spin button is pressed (up adds the value,
-down subtracts the value).
-
-=item Option: B<-readonlybackground>
-
-=item Name: B<readonlyBackground>
-
-=item Class: B<ReadonlyBackground>
-
-Specifies the background color to use when the Spinbox is readonly. If
-this option is the empty string, the normal background color is used.
-
-=item Option: B<-state>
-
-=item Name: B<state>
-
-=item Class: B<State>
-
-Specifies one of three states for the Spinbox: B<normal>,
-B<disabled>, or B<readonly>. If the Spinbox is readonly, then the
-value may not be changed using methods and no insertion cursor
-will be displayed, even if the input focus is in the widget; the
-contents of the widget may still be selected. If the Spinbox is
-disabled, the value may not be changed, no insertion cursor will be
-displayed, the contents will not be selectable, and the Spinbox may
-be displayed in a different color, depending on the values of the
-B<-disabledforeground> and B<-disabledbackground> options.
-
-=item Option: B<-to>
-
-=item Name: B<to>
-
-=item Class: B<To>
-
-A floating-point value corresponding to the highest value for the Spinbox,
-to be used in conjunction with B<-from> and B<-increment>. When
-all are specified correctly, the Spinbox will use these values to control
-its contents. This value must be greater than the B<-from> option.
-If B<-values> is specified, it supercedes this option.
-
-=item Option: B<-validate>
-
-=item Name: B<validate>
-
-=item Class: B<Validate>
-
-Specifies the mode in which validation should operate: B<none>,
-B<focus>, B<focusin>, B<focusout>, B<key>, or B<all>.
-It defaults to B<none>. When you want validation, you must explicitly
-state which mode you wish to use. See B<Validation> below for more.
-
-=item Option: B<-validatecommand>
-
-=item Alias: B<-vcmd>
-
-=item Name: B<validateCommand>
-
-=item Class: B<ValidateCommand>
-
-Specifies a script to evaluate when you want to validate the input in the
-widget. Setting it to an empty string disables this feature (the default).
-Validation occurs according to the value of B<-validate>.
-This command must return a valid boolean value. If it returns 0 (or
-the valid boolean equivalent) then the value of the widget will not
-change and the B<invalidCommand> will be evaluated if it is set. If it
-returns 1, then value will be changed.
-See B<Validation> below for more information.
-
-=item Option: B<-values>
-
-=item Name: B<values>
-
-=item Class: B<Values>
-
-Must be a proper list value. If specified, the Spinbox will use these
-values as to control its contents, starting with the first value. This
-option has precedence over the B<-from> and B<-to> range.
-
-=item Option: B<-width>
-
-=item Name: B<width>
-
-=item Class: B<Width>
-
-Specifies an integer value indicating the desired width of the Spinbox window,
-in average-size characters of the widget's font.
-If the value is less than or equal to zero, the widget picks a
-size just large enough to hold its current text.
-
-=item Option: B<-wrap>
-
-=item Name: B<wrap>
-
-=item Class: B<Wrap>
-
-Must be a proper boolean value. If on, the Spinbox will wrap around the
-values of data in the widget.
-
-=back
-
-=head1 DESCRIPTION
-
-The B<Spinbox> method creates a new window (given by the
-$spinbox argument) and makes it into a Spinbox widget.
-Additional options, described above, may be specified on the
-command line or in the option database
-to configure aspects of the Spinbox such as its colors, font,
-and relief.
-
-A B<Spinbox> is an extended B<Entry> widget that allows he user
-to move, or spin, through a fixed set of ascending or descending values
-such as times or dates in addition to editing the value as in an
-B<entry>. When first created, a Spinbox's string is empty.
-A portion of the Spinbox may be selected as described below.
-If a Spinbox is exporting its selection (see the B<exportSelection>
-option), then it will observe the standard protocols for handling the
-selection; Spinbox selections are available as type B<STRING>.
-Spinboxes also observe the standard Tk rules for dealing with the
-input focus. When a Spinbox has the input focus it displays an
-I<insertion cursor> to indicate where new characters will be
-inserted.
-
-Spinboxes are capable of displaying strings that are too long to
-fit entirely within the widget's window. In this case, only a
-portion of the string will be displayed; commands described below
-may be used to change the view in the window. Spinboxes use
-the standard B<-xscrollcommand> mechanism for interacting with
-scrollbars (see the description of the B<-xscrollcommand> option
-for details). They also support scanning, as described below.
-
-=head1 VALIDATION
-
-Validation works by setting the B<validateCommand>
-option to a callback which will be evaluated according to the B<validate>
-option as follows:
-
-=over 4
-
-=item B<none>
-
-Default. This means no validation will occur.
-
-=item B<focus>
-
-B<validateCommand> will be called when the Spinbox receives or
-loses focus.
-
-=item B<focusin>
-
-B<validateCommand> will be called when the Spinbox receives focus.
-
-=item B<focusout>
-
-B<validateCommand> will be called when the Spinbox loses focus.
-
-=item B<key>
-
-B<validateCommand> will be called when the Spinbox is edited.
-
-=item B<all>
-
-B<validateCommand> will be called for all above conditions.
-
-
-The B<validateCommand> and B<invalidCommand> callbacks are invoked
-with at least 5 positional arguments, which are I<appended> to any already
-existing callback arguments:
-
-=over 4
-
-=item * 1
-
-The proposed value of the entry. If you are configuring the
-entry widget to have a new textVariable, this will be the value of that
-textVariable.
-
-=item * 2
-
-The characters to be added (or deleted). This will be C<undef>
-if validation is due to focus, explcit call to validate or if change
-is due to C<-textvariable> changing.
-
-=item * 3
-
-The current value of entry i.e. before the proposed change.
-
-=item * 4
-
-The index of character string to be added/deleted, if any. Otherwise -1.
-
-=item * 5
-
-Type of action. 1 == INSERT, 0 == DELETE,
--1 if it's a forced validation or textVariable validation.
-
-=back
-
-In general, the B<textVariable> and B<validateCommand> can be
-dangerous to mix. Any problems have been overcome so that using the
-B<validateCommand> will not interfere with the traditional behavior of
-the Spinbox widget. Using the B<textVariable> for read-only purposes will
-never cause problems. The danger comes when you try set the
-B<textVariable> to something that the B<validateCommand> would not
-accept, which causes B<validate> to become I<none> (the
-B<invalidCommand> will not be triggered). The same happens
-when an error occurs evaluating the B<validateCommand>.
-
-Primarily, an error will occur when the B<validateCommand> or
-B<invalidCommand> encounters an error in its script while evaluating or
-B<validateCommand> does not return a valid boolean value. The
-B<validate> option will also set itself to B<none> when you edit the
-Spinbox widget from within either the B<validateCommand> or the
-B<invalidCommand>. Such editions will override the one that was being
-validated. If you wish to edit the value of the widget
-during validation and still have the B<validate> option set, you should
-include the command
-
- my $val = $spinbox->cget(-validate);
- $spinbox->configure(-validate => $val);
-
-in the B<validateCommand> or B<invalidCommand> (whichever one you
-were editing the Spinbox widget from). It is also recommended to not set an
-associated B<textVariable> during validation, as that can cause the
-Spinbox widget to become out of sync with the B<textVariable>.
-
-=back
-
-=head1 WIDGET METHODS
-
-The B<Spinbox> command creates a widget object whose
-name is $widget. This command may be used to invoke various
-operations on the widget. It has the following general form:
-
- $widget->method(?arg arg ...?);
-
-Many of the methods for Spinboxes take one or more indices as
-arguments. An index specifies a particular character in the Spinbox's
-string, in any of the following ways:
-
-=over 4
-
-=item I<number>
-
-Specifies the character as a numerical index, where 0 corresponds
-to the first character in the string.
-
-=item B<anchor>
-
-Indicates the anchor point for the selection, which is set with the
-B<select from> and B<select adjust> methods.
-
-=item B<end>
-
-Indicates the character just after the last one in the Spinbox's string.
-This is equivalent to specifying a numerical index equal to the length
-of the Spinbox's string.
-
-=item B<insert>
-
-Indicates the character adjacent to and immediately following the
-insertion cursor.
-
-=item B<sel.first>
-
-Indicates the first character in the selection. It is an error to
-use this form if the selection isn't in the Spinbox window.
-
-=item B<sel.last>
-
-Indicates the character just after the last one in the selection.
-It is an error to use this form if the selection isn't in the
-Spinbox window.
-
-=item B<@>I<number>
-
-In this form, I<number> is treated as an x-coordinate in the
-Spinbox's window; the character spanning that x-coordinate is used.
-For example, ``B<@0>'' indicates the left-most character in the
-window.
-
-=back
-
-Abbreviations may be used for any of the forms above, e.g. ``B<e>''
-or ``B<sel.f>''. In general, out-of-range indices are automatically
-rounded to the nearest legal value.
-
-The following commands are possible for Spinbox widgets:
-
-=over 4
-
-=item I<$widget>-E<gt>B<bbox>(I<index>);
-
-Returns a list of four numbers describing the bounding box of the
-character given by I<index>.
-The first two elements of the list give the x and y coordinates of
-the upper-left corner of the screen area covered by the character
-(in pixels relative to the widget) and the last two elements give
-the width and height of the character, in pixels.
-The bounding box may refer to a region outside the visible area
-of the window.
-
-=item I<$widget>-E<gt>B<cget>(I<option>);
-
-Returns the current value of the configuration option given
-by I<option>.
-I<Option> may have any of the values accepted by the B<Spinbox>
-command.
-
-=item I<$widget>-E<gt>B<configure>(?I<option>?, ?I<value, option, value, ...>?);
-
-Query or modify the configuration options of the widget.
-If no I<option> is specified, returns a list describing all of
-the available options for $widget (see L<Tk::configure> for
-information on the format of this list). If I<option> is specified
-with no I<value>, then the command returns a list describing the
-one named option (this list will be identical to the corresponding
-sublist of the value returned if no I<option> is specified). If
-one or more I<option-value> pairs are specified, then the command
-modifies the given widget option(s) to have the given value(s); in
-this case the command returns an empty string.
-I<Option> may have any of the values accepted by the B<Spinbox>
-command.
-
-=item I<$widget>-E<gt>B<delete>(I<first, >?I<last>?);
-
-Delete one or more elements of the Spinbox.
-I<First> is the index of the first character to delete, and
-I<last> is the index of the character just after the last
-one to delete.
-If I<last> isn't specified it defaults to I<first>+1,
-i.e. a single character is deleted.
-This command returns an empty string.
-
-=item I<$widget>-E<gt>B<get>;
-
-Returns the Spinbox's string.
-
-=item I<$widget>-E<gt>B<icursor>(I<index>);
-
-Arrange for the insertion cursor to be displayed just before the character
-given by I<index>. Returns an empty string.
-
-=item I<$widget>-E<gt>B<identify>(I<x, y>);
-
-Returns the name of the window element corresponding to coordinates
-I<x> and I<y> in the Spinbox. Return value is one of:
-B<none>, B<buttondown>, B<buttonup>, B<entry>.
-
-=item I<$widget>-E<gt>B<index>(I<index>);
-
-Returns the numerical index corresponding to I<index>.
-
-=item I<$widget>-E<gt>B<insert>(I<index, string>);
-
-Insert the characters of I<string> just before the character
-indicated by I<index>. Returns an empty string.
-
-=item I<$widget>-E<gt>B<invoke>(I<element>);
-
-Causes the specified element, either B<buttondown> or B<buttonup>,
-to be invoked, triggering the action associated with it.
-
-=item I<$widget>-E<gt>B<scan>(I<option, args>);
-
-This command is used to implement scanning on Spinboxes. It has
-two forms, depending on I<option>:
-
-=over 4
-
-=item I<$widget>-E<gt>B<scanMark>(I<x>);
-
-Records I<x> and the current view in the Spinbox window; used in
-conjunction with later B<scan dragto> commands. Typically this
-command is associated with a mouse button press in the widget. It
-returns an empty string.
-
-=item I<$widget>-E<gt>B<scanDragto>(I<x>);
-
-This command computes the difference between its I<x> argument
-and the I<x> argument to the last B<scan mark> command for
-the widget. It then adjusts the view left or right by 10 times the
-difference in x-coordinates. This command is typically associated
-with mouse motion events in the widget, to produce the effect of
-dragging the Spinbox at high speed through the window. The return
-value is an empty string.
-
-=back
-
-=item I<$widget>-E<gt>B<selection>(I<option, arg>);
-
-This command is used to adjust the selection within a Spinbox. It
-has several forms, depending on I<option>:
-
-=over 4
-
-=item I<$widget>-E<gt>B<selectionAdjust>(I<index>);
-
-Locate the end of the selection nearest to the character given by
-I<index>, and adjust that end of the selection to be at I<index>
-(i.e including but not going beyond I<index>). The other
-end of the selection is made the anchor point for future
-B<select to> commands. If the selection
-isn't currently in the Spinbox, then a new selection is created to
-include the characters between I<index> and the most recent
-selection anchor point, inclusive.
-Returns an empty string.
-
-=item I<$widget>-E<gt>B<selectionClear>;
-
-Clear the selection if it is currently in this widget. If the
-selection isn't in this widget then the command has no effect.
-Returns an empty string.
-
-=item I<$widget>-E<gt>B<selectionElement>(?I<element>?);
-
-Sets or gets the currently selected element. If a spinbutton element
-is specified, it will be displayed depressed.
-
-=item I<$widget>-E<gt>B<selectionFrom>(I<index>);
-
-Set the selection anchor point to just before the character
-given by I<index>. Doesn't change the selection.
-Returns an empty string.
-
-=item I<$widget>-E<gt>B<selectionPresent>;
-
-Returns 1 if there is are characters selected in the Spinbox,
-0 if nothing is selected.
-
-=item I<$widget>-E<gt>B<selectionRange>(I<start, >I<end>);
-
-Sets the selection to include the characters starting with
-the one indexed by I<start> and ending with the one just
-before I<end>.
-If I<end> refers to the same character as I<start> or an
-earlier one, then the Spinbox's selection is cleared.
-
-=item I<$widget>-E<gt>B<selectionTo>(I<index>);
-
-If I<index> is before the anchor point, set the selection
-to the characters from I<index> up to but not including
-the anchor point.
-If I<index> is the same as the anchor point, do nothing.
-If I<index> is after the anchor point, set the selection
-to the characters from the anchor point up to but not including
-I<index>.
-The anchor point is determined by the most recent B<select from>
-or B<select adjust> command in this widget.
-If the selection isn't in this widget then a new selection is
-created using the most recent anchor point specified for the widget.
-Returns an empty string.
-
-=back
-
-=item I<$widget>-E<gt>B<set>(?I<string>?);
-
-If I<string> is specified, the Spinbox will try and set it to this
-value, otherwise it just returns the Spinbox's string.
-If validation is on, it will occur when setting the string.
-
-=item I<$widget>-E<gt>B<validate>;
-
-This command is used to force an evaluation of the B<validateCommand>
-independent of the conditions specified by the B<validate> option.
-This is done by temporarily setting the B<validate> option to B<all>.
-It returns 0 or 1.
-
-=item I<$widget>-E<gt>B<xview>(I<args>);
-
-This command is used to query and change the horizontal position of the
-text in the widget's window. It can take any of the following
-forms:
-
-=over 4
-
-=item I<$widget>-E<gt>B<xview>;
-
-Returns a list containing two elements.
-Each element is a real fraction between 0 and 1; together they describe
-the horizontal span that is visible in the window.
-For example, if the first element is .2 and the second element is .6,
-20% of the Spinbox's text is off-screen to the left, the middle 40% is visible
-in the window, and 40% of the text is off-screen to the right.
-These are the same values passed to scrollbars via the B<-xscrollcommand>
-option.
-
-=item I<$widget>-E<gt>B<xview>(I<index>);
-
-Adjusts the view in the window so that the character given by I<index>
-is displayed at the left edge of the window.
-
-=item I<$widget>-E<gt>B<xviewMoveto>(I<fraction>);
-
-Adjusts the view in the window so that the character I<fraction> of the
-way through the text appears at the left edge of the window.
-I<Fraction> must be a fraction between 0 and 1.
-
-=item I<$widget>-E<gt>B<xviewScroll>(I<number, what>);
-
-This command shifts the view in the window left or right according to
-I<number> and I<what>.
-I<Number> must be an integer.
-I<What> must be either B<units> or B<pages> or an abbreviation
-of one of these.
-If I<what> is B<units>, the view adjusts left or right by
-I<number> average-width characters on the display; if it is
-B<pages> then the view adjusts by I<number> screenfuls.
-If I<number> is negative then characters farther to the left
-become visible; if it is positive then characters farther to the right
-become visible.
-
-=back
-
-=back
-
-=head1 DEFAULT BINDINGS
-
-Tk automatically creates class bindings for Spinboxes that give them
-the following default behavior.
-In the descriptions below, ``word'' refers to a contiguous group
-of letters, digits, or ``_'' characters, or any single character
-other than these.
-
-=over 4
-
-=item [1]
-
-Clicking mouse button 1 positions the insertion cursor
-just before the character underneath the mouse cursor, sets the
-input focus to this widget, and clears any selection in the widget.
-Dragging with mouse button 1 strokes out a selection between
-the insertion cursor and the character under the mouse.
-
-=item [2]
-
-Double-clicking with mouse button 1 selects the word under the mouse
-and positions the insertion cursor at the beginning of the word.
-Dragging after a double click will stroke out a selection consisting
-of whole words.
-
-=item [3]
-
-Triple-clicking with mouse button 1 selects all of the text in the
-Spinbox and positions the insertion cursor before the first character.
-
-=item [4]
-
-The ends of the selection can be adjusted by dragging with mouse
-button 1 while the Shift key is down; this will adjust the end
-of the selection that was nearest to the mouse cursor when button
-1 was pressed.
-If the button is double-clicked before dragging then the selection
-will be adjusted in units of whole words.
-
-=item [5]
-
-Clicking mouse button 1 with the Control key down will position the
-insertion cursor in the Spinbox without affecting the selection.
-
-=item [6]
-
-If any normal printing characters are typed in a Spinbox, they are
-inserted at the point of the insertion cursor.
-
-=item [7]
-
-The view in the Spinbox can be adjusted by dragging with mouse button 2.
-If mouse button 2 is clicked without moving the mouse, the selection
-is copied into the Spinbox at the position of the mouse cursor.
-
-=item [8]
-
-If the mouse is dragged out of the Spinbox on the left or right sides
-while button 1 is pressed, the Spinbox will automatically scroll to
-make more text visible (if there is more text off-screen on the side
-where the mouse left the window).
-
-=item [9]
-
-The Left and Right keys move the insertion cursor one character to the
-left or right; they also clear any selection in the Spinbox and set
-the selection anchor.
-If Left or Right is typed with the Shift key down, then the insertion
-cursor moves and the selection is extended to include the new character.
-Control-Left and Control-Right move the insertion cursor by words, and
-Control-Shift-Left and Control-Shift-Right move the insertion cursor
-by words and also extend the selection.
-Control-b and Control-f behave the same as Left and Right, respectively.
-Meta-b and Meta-f behave the same as Control-Left and Control-Right,
-respectively.
-
-=item [10]
-
-The Home key, or Control-a, will move the insertion cursor to the
-beginning of the Spinbox and clear any selection in the Spinbox.
-Shift-Home moves the insertion cursor to the beginning of the Spinbox
-and also extends the selection to that point.
-
-=item [11]
-
-The End key, or Control-e, will move the insertion cursor to the
-end of the Spinbox and clear any selection in the Spinbox.
-Shift-End moves the cursor to the end and extends the selection
-to that point.
-
-=item [12]
-
-The Select key and Control-Space set the selection anchor to the position
-of the insertion cursor. They don't affect the current selection.
-Shift-Select and Control-Shift-Space adjust the selection to the
-current position of the insertion cursor, selecting from the anchor
-to the insertion cursor if there was not any selection previously.
-
-=item [13]
-
-Control-/ selects all the text in the Spinbox.
-
-=item [14]
-
-Control-\ clears any selection in the Spinbox.
-
-=item [15]
-
-The F16 key (labelled Copy on many Sun workstations) or Meta-w
-copies the selection in the widget to the clipboard, if there is a selection.
-
-=item [16]
-
-The F20 key (labelled Cut on many Sun workstations) or Control-w
-copies the selection in the widget to the clipboard and deletes
-the selection.
-If there is no selection in the widget then these keys have no effect.
-
-=item [17]
-
-The F18 key (labelled Paste on many Sun workstations) or Control-y
-inserts the contents of the clipboard at the position of the
-insertion cursor.
-
-=item [18]
-
-The Delete key deletes the selection, if there is one in the Spinbox.
-If there is no selection, it deletes the character to the right of
-the insertion cursor.
-
-=item [19]
-
-The BackSpace key and Control-h delete the selection, if there is one
-in the Spinbox.
-If there is no selection, it deletes the character to the left of
-the insertion cursor.
-
-=item [20]
-
-Control-d deletes the character to the right of the insertion cursor.
-
-=item [21]
-
-Meta-d deletes the word to the right of the insertion cursor.
-
-=item [22]
-
-Control-k deletes all the characters to the right of the insertion
-cursor.
-
-=item [23]
-
-Control-t reverses the order of the two characters to the right of
-the insertion cursor.
-
-If the Spinbox is disabled using the B<-state> option, then the Spinbox's
-view can still be adjusted and text in the Spinbox can still be selected,
-but no insertion cursor will be displayed and no text modifications will
-take place.
-
-The behavior of Spinboxes can be changed by defining new bindings for
-individual widgets or by redefining the class bindings.
-
-=back
-
-=head1 KEYWORDS
-
-Spinbox, Entry, widget