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'\" Copyright (c) 1991-1994 The Regents of the University of California.

'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.

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'\" RCS: @(#) $Id: wish.1,v 1.1.1.1 2002-01-16 10:25:50 markom Exp $

'\"

.so man.macros

.TH wish 1 8.0 Tk "Tk Applications"

.BS

'\" Note:  do not modify the .SH NAME line immediately below!

.SH NAME

wish \- Simple windowing shell

.SH SYNOPSIS

\fBwish\fR ?\fIfileName arg arg ...\fR?

.SH OPTIONS

.IP "\fB\-colormap \fInew\fR" 20

Specifies that the window should have a new private colormap instead of

using the default colormap for the screen.

.IP "\fB\-display \fIdisplay\fR" 20

Display (and screen) on which to display window.

.IP "\fB\-geometry \fIgeometry\fR" 20

Initial geometry to use for window.  If this option is specified, its

value is stored in the \fBgeometry\fR global variable of the application's

Tcl interpreter.

.IP "\fB\-name \fIname\fR" 20

Use \fIname\fR as the title to be displayed in the window, and

as the name of the interpreter for \fBsend\fR commands.

.IP "\fB\-sync\fR" 20

Execute all X server commands synchronously, so that errors

are reported immediately.  This will result in much slower

execution, but it is useful for debugging.

.VS 8.0 br

.IP "\fB\-use\fR \fIid\fR" 20

Specifies that the main window for the application is to be embedded in

the window whose identifier is \fIid\fR, instead of being created as an

independent toplevel window.  \fIId\fR must be specified in the same

way as the value for the \fB\-use\fR option for toplevel widgets (i.e.

it has a form like that returned by the \fBwinfo id\fR command).

.VE

.IP "\fB\-visual \fIvisual\fR" 20

Specifies the visual to use for the window.

\fIVisual\fR may have any of the forms supported by the \fBTk_GetVisual\fR

procedure.

.IP "\fB\-\|\-\fR" 20

Pass all remaining arguments through to the script's \fBargv\fR

variable without interpreting them.

This provides a mechanism for passing arguments such as \fB\-name\fR

to a script instead of having \fBwish\fR interpret them.

.BE

.SH DESCRIPTION

.PP

\fBWish\fR 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 \fBwish\fR is invoked with no arguments, or with a first argument

that starts with ``\-'', then it 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 \fB.wishrc\fR in the home directory of

the user, \fBwish\fR evaluates the file as a Tcl script

just before reading the first command from standard input.

.PP

If \fBwish\fR is invoked with an initial \fIfileName\fR argument, then

\fIfileName\fR is treated as the name of a script file.

\fBWish\fR will evaluate the script in \fIfileName\fR (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 \fB.wishrc\fR in this

case, but the script file can always \fBsource\fR it if desired.

.SH "OPTIONS"

.PP

\fBWish\fR automatically processes all of the command-line options

described in the \fBOPTIONS\fR summary above.

Any other command-line arguments besides these are passed through

to the application using the \fBargc\fR and \fBargv\fR variables

described later.

.SH "APPLICATION NAME AND CLASS"

.PP

The name of the application, which is used for purposes such as

\fBsend\fR commands, is taken from the \fB\-name\fR option,

if it is specified;  otherwise it is taken from \fIfileName\fR,

if it is specified, or from the command name by which

\fBwish\fR was invoked.  In the last two cases, if the name contains a ``/''

character, then only the characters after the last slash are used

as the application name.

.PP

The class of the application, which is used for purposes such as

specifying options with a \fBRESOURCE_MANAGER\fR property or .Xdefaults

file, is the same as its name except that the first letter is

capitalized.

.SH "VARIABLES"

.PP

\fBWish\fR sets the following Tcl variables:

.TP 15

\fBargc\fR

Contains a count of the number of \fIarg\fR arguments (0 if none),

not including the options described above.

.TP 15

\fBargv\fR

Contains a Tcl list whose elements are the \fIarg\fR arguments

that follow a \fB\-\|\-\fR option or don't match any of the

options described in OPTIONS above, in order, or an empty string

if there are no such arguments.

.TP 15

\fBargv0\fR

Contains \fIfileName\fR if it was specified.

Otherwise, contains the name by which \fBwish\fR was invoked.

.TP 15

\fBgeometry\fR

If the \fB\-geometry\fR option is specified, \fBwish\fR copies its

value into this variable.  If the variable still exists after

\fIfileName\fR has been evaluated, \fBwish\fR uses the value of

the variable in a \fBwm geometry\fR command to set the main

window's geometry.

.TP 15

\fBtcl_interactive\fR

Contains 1 if \fBwish\fR is reading commands interactively (\fIfileName\fR

was not specified and standard input is a terminal-like

device), 0 otherwise.

.SH "SCRIPT FILES"

.PP

If you create a Tcl script in a file whose first line is

.CS

\fB#!/usr/local/bin/wish\fR

.CE

then you can invoke the script file directly from your shell if

you mark it as executable.

This assumes that \fBwish\fR has been installed in the default

location in /usr/local/bin;  if it's installed somewhere else

then you'll have to modify the above line to match.

Many UNIX systems do not allow the \fB#!\fR line to exceed about

30 characters in length, so be sure that the \fBwish\fR executable

can be accessed with a short file name.

.PP

An even better approach is to start your script files with the

following three lines:

.CS

\fB#!/bin/sh

# the next line restarts using wish \e

exec wish "$0" "$@"\fR

.CE

This approach has three advantages over the approach in the previous

paragraph.  First, the location of the \fBwish\fR binary doesn't 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 \fBwish\fR is

itself a shell script (this is done on some systems in order to

handle multiple architectures or operating systems:  the \fBwish\fR

script selects one of several binaries to run).  The three lines

cause both \fBsh\fR and \fBwish\fR to process the script, but the

\fBexec\fR is only executed by \fBsh\fR.

\fBsh\fR processes the script first;  it treats the second

line as a comment and executes the third line.

The \fBexec\fR statement cause the shell to stop processing and

instead to start up \fBwish\fR to reprocess the entire script.

When \fBwish\fR 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 comment on the second line.

.SH PROMPTS

.PP

When \fBwish\fR is invoked interactively it normally prompts for each

command with ``\fB% \fR''.  You can change the prompt by setting the

variables \fBtcl_prompt1\fR and \fBtcl_prompt2\fR.  If variable

\fBtcl_prompt1\fR exists then it must consist of a Tcl script

to output a prompt;  instead of outputting a prompt \fBwish\fR

will evaluate the script in \fBtcl_prompt1\fR.

The variable \fBtcl_prompt2\fR is used in a similar way when

a newline is typed but the current command isn't yet complete;

if \fBtcl_prompt2\fR isn't set then no prompt is output for

incomplete commands.

.SH KEYWORDS

shell, toolkit