pack [text .text]

    set result [exec my_command]

    .text insert 1.0 $result

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Can someone show us what is needed to do things like add scrollbars that
get displayed if the text is bigger than the text widget's display, as well
as perhaps some key bindings to scroll back and forth?

Here's what I am trying - but it doesn't display anything...


 #! /usr/tcl84/bin/tclsh
 # Needed:
 #       1. scrollbar
 #       2. exit button or binding

 package require Tk
 package require BWidget

 set b [ScrolledWindow .base -auto both]
 pack $b
 text $b.text
 pack $b.text
 set result [exec cat $argv]
 $b.text insert 1.0 $result
 puts "Done"


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See documentation on [exec] for information about how to pass in command-line arguments and "stdin" data.



[[Is there no comparably reduced example already in the Wiki?]]

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If the process is a long running process, this will lock up your GUI.
Checkout the [fileevent] page to see how to run the command with 
open & just get updates as they are available. (Change the line 
'''puts "got: $line"''' to '''.text insert end $line''' and 
possibly add a '''.text see end''')

bbh

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What about a tk app that talks to a running tcl app in a separate process - is there an example that shows doing this?

Well, yes, although perhaps it's not obviously labeled that way yet.
"[Inventory of IPC methods]" aims to point to ''all'' the ways to get
two such processes in communication.

----
See also [tailf] and [Tailing widget].

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[Category GUI]
| [Category Example]