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wish !!!wish NAME SYNOPSIS OPTIONS DESCRIPTION OPTIONS APPLICATION NAME AND CLASS VARIABLES SCRIPT FILES PROMPTS KEYWORDS ---- !!NAME wish - Simple windowing shell !!SYNOPSIS __wish__ ?''fileName arg arg ...''? !!OPTIONS __-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 immediately. This will result in much slower execution, but it is useful for debugging. __-use__ ''id'' Specifies that the main window for the application is to be embedded in the window 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__ command). __-visual__ ''visual''Specifies the visual to use for thewindow. '' Visual'' may have any of theforms supported by the __Tk_!GetVisual__procedure.__--__ Pass all remainingarguments through to the script's __argv__variable without interpreting them.This provides a mechanism for passingarguments such as __-name__ to a scriptinstead 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 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 __.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 __wish__ is invoked with an initial ''fileName'' argument, 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__ in this case, but the script file can always __source__ it if desired. !!OPTIONS __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 ``/'' character, 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 don't 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's installed somewhere else then you'll 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 __ This approach has three advantages over the approach in the previous paragraph. First, the location of the __wish__ 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 __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 comment on the second line. !!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 evaluate the script in __tcl_prompt1__. The variable __tcl_prompt2__ is used in a similar way when a newline is typed but the current command isn't yet complete; if __tcl_prompt2__ isn't set then no prompt is output for incomplete commands. !!KEYWORDS shell, toolkit ----
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