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wish(1)                                        Tk Applications                                       wish(1)



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NAME
       wish - Simple windowing shell

SYNOPSIS
       wish ?-encoding name? ?fileName arg arg ...?

OPTIONS
       -encoding name      Specifies  the encoding of the text stored in fileName.  This option is only rec- |
                           ognized prior to the fileName argument.

       -colormap new       Specifies that the window should have a new private colormap instead of using the
                           default colormap for the screen.

       -display display    Display (and screen) on which to display window.

       -geometry geometry  Initial  geometry  to  use for window.  If this option is specified, its value is
                           stored in the geometry global variable of the application's Tcl interpreter.

       -name name          Use name as the title to be displayed in the window,  and  as  the  name  of  the
                           interpreter for send commands.

       -sync               Execute  all X server commands synchronously, so that errors are reported immedi-ately. immediately.
                           ately.  This will result in much slower execution, but it is  useful  for  debug-ging. debugging.
                           ging.

       -use id             Specifies  that the main window for the application is to be embedded in the win-dow window
                           dow whose identifier is id, instead of being created as an  independent  toplevel
                           window.   Id  must  be specified in the same way as the value for the -use option
                           for toplevel widgets (i.e.  it has a form like that returned by the winfo id com-mand). command).
                           mand).
                           Note  that  on  some platforms this will only work correctly if id refers to a Tk
                           frame or toplevel that has its -container option enabled.

       -visual visual      Specifies the visual to use for the window.  Visual may have  any  of  the  forms
                           supported by the Tk_GetVisual procedure.

       --                  Pass all remaining arguments through to the script's argv variable without inter-preting interpreting
                           preting them.  This provides a mechanism for passing arguments such as -name to a
                           script instead of having wish interpret them.
____________________________________________________________________________________________________________

DESCRIPTION
       Wish  is  a simple program consisting of the Tcl command language, the Tk toolkit, and a main program
       that reads commands from standard input or from a file.  It creates a main window and then  processes
       Tcl  commands.   If  wish  is  invoked with arguments, then the first few arguments, ?-encoding name?
       ?fileName? specify the name of a script file, and, optionally, the encoding of the text  data  stored
       in  that  script file.  A value for fileName is recognized if the appropriate argument does not start
       with "-".

       If there are no arguments, or the arguments do not specify a fileName, then wish reads  Tcl  commands
       interactively  from standard input.  It will continue processing commands until all windows have been
       deleted or until end-of-file is reached on standard input.  If there exists a file ".wishrc"  in  the
       home  directory  of  the  user, wish evaluates the file as a Tcl script just before reading the first
       command from standard input.

       If arguments to wish do specify a fileName, then fileName is treated as the name of  a  script  file.
       Wish  will  evaluate the script in fileName (which presumably creates a user interface), then it will
       respond to events until all windows have been deleted.  Commands  will  not  be  read  from  standard
       input.   There is no automatic evaluation of ".wishrc" when the name of a script file is presented on
       the wish command line, but the script file can always source it if desired.

       Note that on Windows, the wishversion.exe program varies from  the  tclshversion.exe  program  in  an
       additional important way: it does not connect to a standard Windows console and is instead a windowed
       program. Because of this, it additionally provides access to its own console command.

OPTION PROCESSING
       Wish automatically processes all of the command-line options described in the OPTIONS summary  above.
       Any  other  command-line arguments besides these are passed through to the application using the argc
       and argv variables described later.

APPLICATION NAME AND CLASS
       The name of the application, which is used for purposes such as send  commands,  is  taken  from  the
       -name  option,  if it is specified;  otherwise it is taken from fileName, if it is specified, or from
       the command name by which wish was invoked.  In the last two cases, if the name contains a "/"  char-acter, character,
       acter, then only the characters after the last slash are used as the application name.

       The  class  of  the  application,  which  is  used  for  purposes  such  as specifying options with a
       RESOURCE_MANAGER property or .Xdefaults file, is the same as its name except that the first letter is
       capitalized.

VARIABLES
       Wish sets the following Tcl variables:

       argc           Contains a count of the number of arg arguments (0 if none), not including the options
                      described above.

       argv           Contains a Tcl list whose elements are the arg arguments that follow a -- option or do
                      not  match any of the options described in OPTIONS above, in order, or an empty string
                      if there are no such arguments.

       argv0          Contains fileName if it was specified.  Otherwise, contains the name by which wish was
                      invoked.

       geometry       If  the  -geometry  option is specified, wish copies its value into this variable.  If
                      the variable still exists after fileName has been evaluated, wish uses  the  value  of
                      the variable in a wm geometry command to set the main window's geometry.

       tcl_interactive
                      Contains  1  if wish is reading commands interactively (fileName was not specified and
                      standard input is a terminal-like device), 0 otherwise.

SCRIPT FILES
       If you create a Tcl script in a file whose first line is
              #!/usr/local/bin/wish
       then you can invoke the script file directly from your shell if you  mark  it  as  executable.   This
       assumes  that  wish has been installed in the default location in /usr/local/bin;  if it is installed
       somewhere else then you will have to modify the above line to match.  Many UNIX systems do not  allow
       the  #!  line  to  exceed  about  30 characters in length, so be sure that the wish executable can be
       accessed with a short file name.

       An even better approach is to start your script files with the following three lines:
              #!/bin/sh
              # the next line restarts using wish \
              exec wish "$0" "$@"
       This approach has three advantages over the approach in the previous paragraph.  First, the  location
       of  the wish binary does not have to be hard-wired into the script:  it can be anywhere in your shell
       search path.  Second, it gets around the 30-character file  name  limit  in  the  previous  approach.
       Third, this approach will work even if wish is itself a shell script (this is done on some systems in
       order to handle multiple architectures or operating systems:  the wish script selects one of  several
       binaries to run).  The three lines cause both sh and wish to process the script, but the exec is only
       executed by sh.  sh processes the script first;  it treats the second line as a comment and  executes
       the  third  line.  The exec statement cause the shell to stop processing and instead to start up wish
       to reprocess the entire script.  When wish starts up, it treats all three lines  as  comments,  since
       the  backslash  at the end of the second line causes the third line to be treated as part of the com-ment comment
       ment on the second line.

       The end of a script file may be marked either by the physical end of the medium, or by the character,
       "\032"  ("\u001a",  control-Z).   If this character is present in the file, the wish application will
       read text up to but not including the character.  An application that requires this character in  the
       file may encode it as "\032", "\x1a", or "\u001a"; or may generate it by use of commands such as for-mat format
       mat or binary.

PROMPTS
       When wish is invoked interactively it normally prompts for each command with "% ".   You  can  change
       the prompt by setting the variables tcl_prompt1 and tcl_prompt2.  If variable tcl_prompt1 exists then
       it must consist of a Tcl script to output a prompt;  instead of outputting a prompt wish will  evalu-ate evaluate
       ate  the  script in tcl_prompt1.  The variable tcl_prompt2 is used in a similar way when a newline is
       typed but the current command is not yet complete; if tcl_prompt2 is not set then no prompt is output
       for incomplete commands.

KEYWORDS
       shell, toolkit



Tk                                                   8.0                                             wish(1)