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


       tk - Manipulate Tk internal state

       tk option ?arg arg ...?

       The  tk command provides access to miscellaneous elements of Tk's internal state.  Most of
       the information manipulated by this command pertains to the application as a whole, or  to
       a  screen  or  display, rather than to a particular window.  The command can take any of a
       number of different forms depending on the option argument.  The legal forms are:

       tk appname ?newName?
	      If newName isn't specified, this command returns the name of the	application  (the
	      name  that  may  be used in send commands to communicate with the application).  If
	      newName is specified, then the name of the application is changed to  newName.   If
	      the  given  name is already in use, then a suffix of the form `` #2'' or `` #3'' is
	      appended in order to make the name unique.  The command's result is the name  actu-
	      ally  chosen.  newName should not start with a capital letter.  This will interfere
	      with option processing, since names  starting  with  capitals  are  assumed  to  be
	      classes;	as a result, Tk may not be able to find some options for the application.
	      If sends have been disabled by deleting the send command, this command  will  reen-
	      able them and recreate the send command.

       tk scaling ?-displayof window? ?number?
	      Sets  and queries the current scaling factor used by Tk to convert between physical
	      units (for example, points, inches, or millimeters) and pixels.  The  number  argu-
	      ment  is	a  floating point number that specifies the number of pixels per point on
	      window's display.  If the window argument is omitted, it defaults to the main  win-
	      dow.  If the number argument is omitted, the current value of the scaling factor is

	      A ``point'' is a unit of measurement equal to 1/72 inch.	A scaling factor  of  1.0
	      corresponds to 1 pixel per point, which is equivalent to a standard 72 dpi monitor.
	      A scaling factor of 1.25 would mean 1.25 pixels per point, which is the setting for
	      a  90  dpi  monitor;  setting  the scaling factor to 1.25 on a 72 dpi monitor would
	      cause everything in the application to be displayed 1.25 times as large as  normal.
	      The  initial value for the scaling factor is set when the application starts, based
	      on properties of the installed monitor, but it can be changed at	any  time.   Mea-
	      surements made after the scaling factor is changed will use the new scaling factor,
	      but it is undefined whether existing widgets will resize themselves dynamically  to
	      accomodate the new scaling factor.

       tk useinputmethods ?-displayof window? ?boolean? 					  |
	      Sets  and queries the state of whether Tk should use XIM (X Input Methods) for fil- |
	      tering events.  The resulting state is returned.	XIM is used in some locales  (ie: |
	      Japanese,  Korean), to handle special input devices.  This feature is only signifi- |
	      cant on X.  If XIM support is not available, this will always  return  0.   If  the |
	      window  argument	is omitted, it defaults to the main window.  If the boolean argu- |
	      ment is omitted, the current state is returned.  This is turned on by  default  for |
	      the main display.

       application name, send

Tk					       8.3					    tk(n)
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