spinbox - Create and manipulate 'spinbox' value spinner
widgets
spinbox pathName ?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
See the options manual entry for details on the standard
options.
Command-Line Name: -buttonbackground
Database Name: buttonBackground
Database Class: Background
- The background color to be used for the spin buttons.
Command-Line Name: -buttoncursor
Database Name: buttonCursor
Database Class: Cursor
- The cursor to be used when over the spin buttons. If this is empty (the
default), a default cursor will be used.
Command-Line Name: -buttondownrelief
Database Name: buttonDownRelief
Database Class: Relief
- The relief to be used for the upper spin button.
Command-Line Name: -buttonuprelief
Database Name: buttonUpRelief
Database Class: Relief
- The relief to be used for the lower spin button.
Command-Line Name: -command
Database Name: command
Database Class: Command
- Specifies a Tcl command to invoke whenever a spinbutton is invoked. The
command recognizes several percent substitutions: %W for the widget
path, %s for the current value of the widget, and %d for the
direction of the button pressed (up or down).
Command-Line Name: -disabledbackground
Database Name: disabledBackground
Database Class: 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.
Command-Line Name: -disabledforeground
Database Name: disabledForeground
Database Class: 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.
Command-Line Name: -format
Database Name: format
Database Class: Format
- Specifies an alternate format to use when setting the string value when
using the -from and -to range. This must be a format
specifier of the form %<pad>.<pad>f, as it will format
a floating-point number.
Command-Line Name: -from
Database Name: from
Database Class: From
- A floating-point value corresponding to the lowest value for a spinbox, to
be used in conjunction with -to and -increment. When all are
specified correctly, the spinbox will use these values to control its
contents. This value must be less than the -to option. If
-values is specified, it supersedes this option.
Command-Line Name: -invalidcommand or -invcmd
Database Name: invalidCommand
Database Class: InvalidCommand
- Specifies a script to eval when -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 bell. See VALIDATION below for
more information.
Command-Line Name: -increment
Database Name: increment
Database Class: Increment
- A floating-point value specifying the increment. When used with
-from and -to, the value in the widget will be adjusted by
-increment when a spin button is pressed (up adds the value, down
subtracts the value).
Command-Line Name: -readonlybackground
Database Name: readonlyBackground
Database Class: 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.
Command-Line Name: -state
Database Name: state
Database Class: State
- Specifies one of three states for the spinbox: normal,
disabled, or readonly. If the spinbox is readonly, then the
value may not be changed using widget commands 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 -disabledforeground and
-disabledbackground options.
Command-Line Name: -to
Database Name: to
Database Class: To
- A floating-point value corresponding to the highest value for the spinbox,
to be used in conjunction with -from and -increment. When
all are specified correctly, the spinbox will use these values to control
its contents. This value must be greater than the -from option. If
-values is specified, it supersedes this option.
Command-Line Name: -validate
Database Name: validate
Database Class: Validate
- Specifies the mode in which validation should operate: none,
focus, focusin, focusout, key, or all.
It defaults to none. When you want validation, you must explicitly
state which mode you wish to use. See VALIDATION below for
more.
Command-Line Name: -validatecommand or -vcmd
Database Name: validateCommand
Database Class: 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 -validate. This command
must return a valid Tcl boolean value. If it returns 0 (or the valid Tcl
boolean equivalent) then the value of the widget will not change and the
-invalidcommand will be evaluated if it is set. If it returns 1,
then value will be changed. See VALIDATION below for more
information.
Command-Line Name: -values
Database Name: values
Database Class: 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 -from and -to range.
Command-Line Name: -width
Database Name: width
Database Class: 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.
Command-Line Name: -wrap
Database Name: wrap
Database Class: wrap
- Must be a proper boolean value. If on, the spinbox will wrap around the
values of data in the widget.
The spinbox command creates a new window (given by the
pathName 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. The spinbox command returns its pathName
argument. At the time this command is invoked, there must not exist a window
named pathName, but pathName's parent must exist.
A spinbox is an extended 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
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 -exportselection option), then it will observe
the standard protocols for handling the selection; spinbox selections are
available as type STRING. Spinboxes also observe the standard Tk
rules for dealing with the input focus. When a spinbox has the input focus
it displays an 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 -xscrollcommand
mechanism for interacting with scrollbars (see the description of the
-xscrollcommand option for details). They also support scanning, as
described below.
Validation works by setting the -validatecommand option to
a script which will be evaluated according to the -validate option as
follows:
- none
- Default. This means no validation will occur.
- focus
- The -validatecommand will be called when the spinbox receives or
loses focus.
- focusin
- The -validatecommand will be called when the spinbox receives
focus.
- focusout
- The -validatecommand will be called when the spinbox loses
focus.
- key
- The -validatecommand will be called when the spinbox is
edited.
- all
- The -validatecommand will be called for all above conditions.
It is possible to perform percent substitutions on the
-validatecommand and -invalidcommand scripts, just as you
would in a bind script. The following substitutions are
recognized:
- %d
- Type of action: 1 for insert, 0 for delete, or -1 for focus,
forced or textvariable validation.
- %i
- Index of char string to be inserted/deleted, if any, otherwise -1.
- %P
- The value of the spinbox should edition occur. If you are configuring the
spinbox widget to have a new textvariable, this will be the value of that
textvariable.
- %s
- The current value of spinbox before edition.
- %S
- The text string being inserted/deleted, if any. Otherwise it is an empty
string.
- %v
- The type of validation currently set.
- %V
- The type of validation that triggered the callback (key, focusin,
focusout, forced).
- %W
- The name of the spinbox widget.
In general, the -textvariable and -validatecommand
can be dangerous to mix. Any problems have been overcome so that using the
-validatecommand will not interfere with the traditional behavior of
the spinbox widget. Using the -textvariable for read-only purposes
will never cause problems. The danger comes when you try set the
-textvariable to something that the -validatecommand would not
accept, which causes -validate to become none (the
-invalidcommand will not be triggered). The same happens when an
error occurs evaluating the -validatecommand.
Primarily, an error will occur when the -validatecommand or
-invalidcommand encounters an error in its script while evaluating or
-validatecommand does not return a valid Tcl boolean value. The
-validate option will also set itself to none when you edit
the spinbox widget from within either the -validatecommand or the
-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 -validate option set, you should include the
command
in the -validatecommand or -invalidcommand (whichever one you were
editing the spinbox widget from). It is also recommended to not set an
associated -textvariable during validation, as that can cause the
spinbox widget to become out of sync with the -textvariable.
Also, the -validate option will set itself to none
when the spinbox value gets changed because of adjustment of -from or
-to and the -validatecommand returns false. For instance
spinbox pathName -from 1 -to 10 -validate all -vcmd {return 0}
will in fact set the -validate option to none because the default
value for the spinbox gets changed (due to the -from and -to
options) to a value not accepted by the validation script.
Moreover, forced validation is performed when invoking any
spinbutton of the spinbox. If the validation script returns false in this
situation, then the -validate option will be automatically set to
none.
The spinbox command creates a new Tcl command whose name is
pathName. This command may be used to invoke various operations on
the widget. It has the following general form:
pathName option ?arg arg ...?
Option and the args determine the exact behavior of the command.
Many of the widget commands 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:
- number
- Specifies the character as a numerical index, where 0 corresponds to the
first character in the string.
- anchor
- Indicates the anchor point for the selection, which is set with the
select from and select adjust widget commands.
- 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.
- insert
- Indicates the character adjacent to and immediately following the
insertion cursor.
- sel.first
- Indicates the first character in the selection. It is an error to use this
form if the selection is not in the spinbox window.
- sel.last
- Indicates the character just after the last one in the selection. It is an
error to use this form if the selection is not in the spinbox window.
- @number
- In this form, number is treated as an x-coordinate in the spinbox's
window; the character spanning that x-coordinate is used. For example,
“@0” indicates the left-most character in the
window.
Abbreviations may be used for any of the forms above, e.g.
“e” or “sel.f”. In general,
out-of-range indices are automatically rounded to the nearest legal
value.
The following commands are possible for spinbox widgets:
- pathName
bbox index
- Returns a list of four numbers describing the bounding box of the
character given by 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.
- pathName
cget option
- Returns the current value of the configuration option given by
option. Option may have any of the values accepted by the
spinbox command.
- pathName
configure ?option? ?value option value
...?
- Query or modify the configuration options of the widget. If no
option is specified, returns a list describing all of the available
options for pathName (see Tk_ConfigureInfo for information
on the format of this list). If option is specified with no
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 option is specified). If one or more
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. Option may have any of the values
accepted by the spinbox command.
- pathName
delete first ?last?
- Delete one or more elements of the spinbox. First is the index of
the first character to delete, and last is the index of the
character just after the last one to delete. If last is not
specified it defaults to first+1, i.e. a single character is
deleted. This command returns an empty string.
- pathName
get
- Returns the spinbox's string.
- pathName
icursor index
- Arrange for the insertion cursor to be displayed just before the character
given by index. Returns an empty string.
- pathName
identify x y
- Returns the name of the window element corresponding to coordinates
x and y in the spinbox. Return value is one of: none,
buttondown, buttonup, entry.
- pathName
index index
- Returns the numerical index corresponding to index.
- pathName
insert index string
- Insert the characters of string just before the character indicated
by index. Returns an empty string.
- pathName
invoke element
- Causes the specified element, either buttondown or buttonup,
to be invoked, triggering the action associated with it.
- pathName
scan option args
- This command is used to implement scanning on spinboxes. It has two forms,
depending on option:
- pathName
scan mark x
- Records x and the current view in the spinbox window; used in
conjunction with later scan dragto commands. Typically this command
is associated with a mouse button press in the widget. It returns an empty
string.
- pathName
scan dragto x
- This command computes the difference between its x argument and the
x argument to the last 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.
- pathName
selection option arg
- This command is used to adjust the selection within a spinbox. It has
several forms, depending on option:
- pathName
selection adjust index
- Locate the end of the selection nearest to the character given by
index, and adjust that end of the selection to be at index
(i.e. including but not going beyond index). The other end of the
selection is made the anchor point for future select to commands.
If the selection is not currently in the spinbox, then a new selection is
created to include the characters between index and the most recent
selection anchor point, inclusive. Returns an empty string.
- pathName
selection clear
- Clear the selection if it is currently in this widget. If the selection is
not in this widget then the command has no effect. Returns an empty
string.
- pathName
selection element ?element?
- Sets or gets the currently selected element. If a spinbutton element is
specified, it will be displayed depressed.
- pathName
selection from index
- Set the selection anchor point to just before the character given by
index. Does not change the selection. Returns an empty string.
- pathName
selection present
- Returns 1 if there is are characters selected in the spinbox, 0 if nothing
is selected.
- pathName
selection range start end
- Sets the selection to include the characters starting with the one indexed
by start and ending with the one just before end. If
end refers to the same character as start or an earlier one,
then the spinbox's selection is cleared.
- pathName
selection to index
- If index is before the anchor point, set the selection to the
characters from index up to but not including the anchor point. If
index is the same as the anchor point, do nothing. If index
is after the anchor point, set the selection to the characters from the
anchor point up to but not including index. The anchor point is
determined by the most recent select from or select adjust
command in this widget. If the selection is not in this widget then a new
selection is created using the most recent anchor point specified for the
widget. Returns an empty string.
- pathName
set ?string?
- If 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.
- pathName
validate
- This command is used to force an evaluation of the -validatecommand
independent of the conditions specified by the -validate option.
This is done by temporarily setting the -validate option to
all. It returns 0 or 1.
- pathName
xview 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:
- pathName
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
-xscrollcommand option.
- pathName
xview index
- Adjusts the view in the window so that the character given by index
is displayed at the left edge of the window.
- pathName
xview moveto fraction
- Adjusts the view in the window so that the character fraction of
the way through the text appears at the left edge of the window.
Fraction must be a fraction between 0 and 1.
- pathName
xview scroll number what
- This command shifts the view in the window left or right according to
number and what. Number must be an integer.
What must be either units or pages or an abbreviation
of one of these. If what is units, the view adjusts left or
right by number average-width characters on the display; if it is
pages then the view adjusts by number screenfuls. If
number is negative then characters farther to the left become
visible; if it is positive then characters farther to the right become
visible.
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.
- [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.
- [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.
- [3]
- Triple-clicking with mouse button 1 selects all of the text in the spinbox
and positions the insertion cursor before the first character.
- [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.
- [5]
- Clicking mouse button 1 with the Control key down will position the
insertion cursor in the spinbox without affecting the selection.
- [6]
- If any normal printing characters are typed in a spinbox, they are
inserted at the point of the insertion cursor.
- [7]
- The view in the spinbox can be adjusted by dragging with the middle mouse
button (button 2, or button 3 in TkAqua). If the middle mouse button is
clicked without moving the mouse, the selection is copied into the spinbox
at the position of the mouse cursor.
- [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).
- [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.
- [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.
- [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.
- [12]
- The Select key and Control-Space set the selection anchor to the position
of the insertion cursor. They do not 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.
- [13]
- Control-/ selects all the text in the spinbox.
- [14]
- Control-\ clears any selection in the spinbox.
- [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.
- [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.
- [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.
- [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.
- [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.
- [20]
- Control-d deletes the character to the right of the insertion cursor.
- [21]
- Meta-d deletes the word to the right of the insertion cursor.
- [22]
- Control-k deletes all the characters to the right of the insertion
cursor.
- [23]
- Control-t reverses the order of the two characters to the right of the
insertion cursor.
If the spinbox is disabled using the -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.