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options(n)		     Tk Built-In Commands		    options(n)

______________________________________________________________________________

NAME
       options - Standard options supported by widgets
_________________________________________________________________

DESCRIPTION
       This  manual entry describes the common configuration options supported
       by widgets in the Tk toolkit.  Every widget does not  necessarily  sup‐
       port  every option (see the manual entries for individual widgets for a
       list of the standard options supported by that widget), but if a widget
       does  support  an  option  with one of the names listed below, then the
       option has exactly the effect described below.

       In the descriptions below, ``Command-Line Name'' refers to  the	switch
       used in class commands and configure widget commands to set this value.
       For example, if an option's  command-line  switch  is  -foreground  and
       there exists a widget .a.b.c, then the command
	      .a.b.c  configure	 -foreground black
       may be used to specify the value black for the option in the the widget
       .a.b.c.	Command-line switches may  be  abbreviated,  as	 long  as  the
       abbreviation  is unambiguous.  ``Database Name'' refers to the option's
       name in the option database (e.g.  in  .Xdefaults  files).   ``Database
       Class''	refers	to  the	 option's  class value in the option database.
       [-activebackground activeBackground] Specifies background color to  use
       when  drawing  active  elements.	  An element (a widget or portion of a
       widget) is active if the mouse cursor is positioned  over  the  element
       and pressing a mouse button will cause some action to occur.  If strict
       Motif compliance has been requested by setting the tk_strictMotif vari‐
       able,  this  option  will  normally  be ignored;	 the normal background
       color will be used instead.  For some elements on Windows and Macintosh │
       systems,	 the  active  color  will only be used while mouse button 1 is │
       pressed over the element.  [-activeborderwidth activeBorderWidth] Spec‐
       ifies a non-negative value indicating the width of the 3-D border drawn
       around active elements.	See above for definition of  active  elements.
       The  value  may have any of the forms acceptable to Tk_GetPixels.  This
       option is typically only available in widgets displaying more than  one
       element	at  a  time  (e.g.  menus  but	not  buttons).	 [-activefore‐
       ground activeForeground] Specifies foreground color to use when drawing
       active	elements.   See	 above	for  definition	 of  active  elements.
       [-anchor anchor] Specifies how the information in a widget  (e.g.  text
       or a bitmap) is to be displayed in the widget.  Must be one of the val‐
       ues n, ne, e, se, s, sw, w, nw, or center.  For example, nw means  dis‐
       play  the  information such that its top-left corner is at the top-left
       corner of the widget.  [-background or  -bg background]	Specifies  the
       normal  background  color  to  use  when displaying the widget.	[-bit‐
       map bitmap] Specifies a bitmap to display in the widget, in any of  the
       forms acceptable to Tk_GetBitmap.  The exact way in which the bitmap is
       displayed may be affected by other options such as anchor  or  justify.
       Typically,  if this option is specified then it overrides other options
       that specify a textual value to	display	 in  the  widget;  the	bitmap
       option may be reset to an empty string to re-enable a text display.  In
       widgets that support both bitmap and image options, image will  usually
       override	 bitmap.   [-borderwidth  or -bd borderWidth] Specifies a non-
       negative value indicating the width of the 3-D border  to  draw	around
       the outside of the widget (if such a border is being drawn;  the relief
       option typically determines this).  The value may  also	be  used  when
       drawing	3-D effects in the interior of the widget.  The value may have
       any of the forms acceptable to Tk_GetPixels.   [-cursor cursor]	Speci‐
       fies  the  mouse	 cursor to be used for the widget.  The value may have
       any of the forms acceptable to Tk_GetCursor.  [-disabledforeground dis‐
       abledForeground]	 Specifies foreground color to use when drawing a dis‐
       abled element.  If the option is specified as an empty string (which is
       typically the case on monochrome displays), disabled elements are drawn
       with the normal foreground color but they are dimmed  by	 drawing  them
       with a stippled fill pattern.  [-exportselection exportSelection] Spec‐
       ifies whether or not a selection in the widget should  also  be	the  X
       selection.   The	 value	may have any of the forms accepted by Tcl_Get‐
       Boolean, such as true, false, 0, 1, yes, or no.	If  the	 selection  is
       exported,  then	selecting in the widget deselects the current X selec‐
       tion, selecting outside the widget deselects any widget selection,  and
       the  widget  will respond to selection retrieval requests when it has a
       selection.  The default is usually for widgets  to  export  selections.
       [-font font]  Specifies	the  font  to use when drawing text inside the
       widget.	[-foreground or -fg foreground]	 Specifies  the	 normal	 fore‐
       ground  color  to  use  when  displaying	 the widget.  [-highlightback‐
       ground highlightBackground] Specifies the color to display in the  tra‐
       versal  highlight region when the widget does not have the input focus.
       [-highlightcolor highlightColor] Specifies the color  to	 use  for  the
       traversal  highlight  rectangle that is drawn around the widget when it
       has the input focus.   [-highlightthickness highlightThickness]	Speci‐
       fies a non-negative value indicating the width of the highlight rectan‐
       gle to draw around the outside of the widget  when  it  has  the	 input
       focus.  The value may have any of the forms acceptable to Tk_GetPixels.
       If the value is zero, no focus highlight is drawn  around  the  widget.
       [-image image]  Specifies an image to display in the widget, which must
       have been created with the image create	command.   Typically,  if  the
       image  option is specified then it overrides other options that specify
       a bitmap or textual value to display in the widget;  the	 image	option
       may  be reset to an empty string to re-enable a bitmap or text display.
       [-insertbackground insertBackground] Specifies  the  color  to  use  as
       background  in  the  area  covered by the insertion cursor.  This color
       will normally override either the normal background for the widget  (or
       the selection background if the insertion cursor happens to fall in the
       selection).  [-insertborderwidth insertBorderWidth]  Specifies  a  non-
       negative	 value	indicating  the width of the 3-D border to draw around
       the insertion cursor.  The value may have any of the  forms  acceptable
       to  Tk_GetPixels.  [-insertofftime insertOffTime] Specifies a non-nega‐
       tive integer value indicating the number of milliseconds the  insertion
       cursor  should  remain  ``off'' in each blink cycle.  If this option is
       zero then the cursor doesn't blink:  it is on all the  time.   [-inser‐
       tontime insertOnTime] Specifies a non-negative integer value indicating
       the number of milliseconds the insertion cursor should remain ``on'' in
       each  blink cycle.  [-insertwidth insertWidth] Specifies a  value indi‐
       cating the total width of the insertion cursor.	The value may have any
       of  the	forms acceptable to Tk_GetPixels.  If a border has been speci‐
       fied for the insertion cursor (using the insertBorderWidth option), the
       border  will  be	 drawn	inside	the width specified by the insertWidth
       option.	[-jump jump] For widgets with a slider that can be dragged  to
       adjust a value, such as scrollbars, this option determines when notifi‐
       cations are made about changes in the value.  The option's  value  must
       be  a  boolean of the form accepted by Tcl_GetBoolean.  If the value is
       false, updates are made continuously as the slider is dragged.  If  the
       value  is  true, updates are delayed until the mouse button is released
       to end the drag;	 at that point a  single  notification	is  made  (the
       value  ``jumps''	 rather	 than  changing smoothly).  [-justify justify]
       When there are multiple lines of	 text  displayed  in  a	 widget,  this
       option  determines  how the lines line up with each other.  Must be one
       of left, center, or right.  Left means that the lines' left  edges  all
       line  up,  center  means that the lines' centers are aligned, and right
       means that the lines' right edges line up.  [-orient orient]  For  wid‐
       gets  that  can lay themselves out with either a horizontal or vertical
       orientation, such as scrollbars, this option specifies  which  orienta‐
       tion  should  be	 used.	 Must  be  either horizontal or vertical or an
       abbreviation of one of these.  [-padx padX]  Specifies  a  non-negative
       value  indicating how much extra space to request for the widget in the
       X-direction.  The value may have any of the forms acceptable to Tk_Get‐
       Pixels.	 When  computing  how large a window it needs, the widget will
       add this amount to the width it would normally need (as	determined  by
       the width of the things displayed in the widget);  if the geometry man‐
       ager can satisfy this request, the widget will end up with extra inter‐
       nal  space  to  the left and/or right of what it displays inside.  Most
       widgets only use this option for padding text:  if they are  displaying
       a   bitmap   or	image,	then  they  usually  ignore  padding  options.
       [-pady padY] Specifies a non-negative value indicating how  much	 extra
       space to request for the widget in the Y-direction.  The value may have
       any of the forms acceptable to Tk_GetPixels.  When computing how	 large
       a  window  it  needs,  the widget will add this amount to the height it
       would normally need (as determined by the height	 of  the  things  dis‐
       played  in  the	widget);   if  the  geometry  manager can satisfy this
       request, the widget will end up with extra internal space above	and/or
       below  what  it displays inside.	 Most widgets only use this option for
       padding text:  if they are displaying a bitmap or image, then they usu‐
       ally ignore padding options.  [-relief relief] Specifies the 3-D effect
       desired for the widget.	Acceptable values are  raised,	sunken,	 flat,
       ridge,  solid, and groove.  The value indicates how the interior of the
       widget should appear relative to its  exterior;	 for  example,	raised
       means  the  interior  of	 the widget should appear to protrude from the
       screen, relative to the exterior of the widget.	 [-repeatdelay repeat‐
       Delay]  Specifies  the  number  of milliseconds a button or key must be
       held down before it begins to auto-repeat.  Used, for example,  on  the
       up-  and	 down-arrows  in scrollbars.  [-repeatinterval repeatInterval]
       Used in conjunction with repeatDelay:  once  auto-repeat	 begins,  this
       option  determines  the	number	of  milliseconds between auto-repeats.
       [-selectbackground selectBackground] Specifies the background color  to
       use  when displaying selected items.  [-selectborderwidth selectBorder‐
       Width] Specifies a non-negative value indicating the width of  the  3-D
       border  to  draw	 around selected items.	 The value may have any of the
       forms acceptable to Tk_GetPixels.  [-selectforeground selectForeground]
       Specifies  the  foreground color to use when displaying selected items.
       [-setgrid setGrid] Specifies a boolean value  that  determines  whether
       this  widget controls the resizing grid for its top-level window.  This
       option is typically used in text widgets, where the information in  the
       widget  has a natural size (the size of a character) and it makes sense
       for the window's dimensions to be  integral  numbers  of	 these	units.
       These  natural  window sizes form a grid.  If the setGrid option is set
       to true then the widget will communicate with  the  window  manager  so
       that when the user interactively resizes the top-level window that con‐
       tains the widget, the dimensions of the window will be displayed to the
       user  in grid units and the window size will be constrained to integral
       numbers of grid units.  See the section GRIDDED GEOMETRY MANAGEMENT  in
       the  wm	manual	entry for more details.	 [-takefocus takeFocus] Deter‐
       mines whether the window accepts the focus  during  keyboard  traversal
       (e.g.,  Tab  and Shift-Tab).  Before setting the focus to a window, the
       traversal scripts consult the value of the takeFocus option.   A	 value
       of  0  means that the window should be skipped entirely during keyboard
       traversal.  1 means that the window should receive the input  focus  as
       long  as	 it  is viewable (it and all of its ancestors are mapped).  An
       empty value for the option means that the traversal  scripts  make  the
       decision	 about	whether	 or  not  to focus on the window:  the current
       algorithm is to skip the window if it is disabled, if  it  has  no  key
       bindings,  or  if it is not viewable.  If the value has any other form,
       then the traversal scripts take the value, append the name of the  win‐
       dow  to	it (with a separator space), and evaluate the resulting string
       as a Tcl script.	 The script must return 0, 1, or an empty string:  a 0
       or  1  value specifies whether the window will receive the input focus,
       and an empty string results in the default  decision  described	above.
       Note:  this interpretation of the option is defined entirely by the Tcl
       scripts that implement traversal:  the  widget  implementations	ignore
       the  option entirely, so you can change its meaning if you redefine the
       keyboard traversal scripts.  [-text text] Specifies a string to be dis‐
       played  inside  the  widget.   The way in which the string is displayed
       depends on the  particular  widget  and	may  be	 determined  by	 other
       options, such as anchor or justify.  [-textvariable textVariable] Spec‐
       ifies the name of a variable.  The value of  the	 variable  is  a  text
       string  to  be  displayed  inside  the  widget;	 if the variable value
       changes then the widget will automatically update itself to reflect the
       new  value.   The  way  in  which the string is displayed in the widget
       depends on the  particular  widget  and	may  be	 determined  by	 other
       options,	 such as anchor or justify.  [-troughcolor troughColor] Speci‐
       fies the color to use for the rectangular trough areas in widgets  such
       as scrollbars and scales.  [-underline underline] Specifies the integer
       index of a character to underline in the widget.	 This option  is  used
       by  the	default bindings to implement keyboard traversal for menu but‐
       tons and menu entries.  0 corresponds to the  first  character  of  the
       text  displayed	in  the	 widget,  1  to the next character, and so on.
       [-wraplength wrapLength] For widgets that  can  perform	word-wrapping,
       this option specifies the maximum line length.  Lines that would exceed
       this length are wrapped onto the next line, so that no line  is	longer
       than  the  specified  length.  The value may be specified in any of the
       standard forms for screen distances.  If this value  is	less  than  or
       equal  to 0 then no wrapping is done:  lines will break only at newline
       characters in the text.	[-xscrollcommand xScrollCommand] Specifies the
       prefix  for  a  command used to communicate with horizontal scrollbars.
       When the view in the widget's window changes (or whenever anything else
       occurs  that  could change the display in a scrollbar, such as a change
       in the total size of the widget's contents), the widget will generate a
       Tcl  command by concatenating the scroll command and two numbers.  Each
       of the numbers is a fraction between 0 and 1, which indicates  a	 posi‐
       tion  in	 the  document.	  0 indicates the beginning of the document, 1
       indicates the end, .333 indicates a position one third the way  through
       the document, and so on.	 The first fraction indicates the first infor‐
       mation in the document that is visible in the window,  and  the	second
       fraction	 indicates the information just after the last portion that is
       visible.	 The command is then passed to the Tcl interpreter for	execu‐
       tion.  Typically the xScrollCommand option consists of the path name of
       a scrollbar widget followed  by	``set'',  e.g.	``.x.scrollbar	set'':
       this  will  cause  the scrollbar to be updated whenever the view in the
       window changes.	If this option is not specified, then no command  will
       be executed.  [-yscrollcommand yScrollCommand] Specifies the prefix for
       a command used to communicate with vertical scrollbars.	This option is
       treated in the same way as the xScrollCommand option, except that it is
       used for vertical scrollbars and is provided by	widgets	 that  support
       vertical	 scrolling.  See the description of xScrollCommand for details
       on how this option is used.

KEYWORDS
       class, name, standard option, switch

Tk				      4.4			    options(n)
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