Exercises, examples and other material relating to training module T216. This topic is presented on public courses Learning to program in Tcl
, Tcl Programming
Would you like to access your Tcl script through a Graphic User Interface? The Tk GUI, which is distributed with most releases of Tcl, provides such a capability. In this module we introduce you to Tk and see a couple of short examples of Tk in use.
Related technical and longer articlesGraphic User Interfaces (GUIs)
|Articles and tips on this subject||updated|
|4460||Using Object Oriented Tcl and the Tk toolkit together - real life example|
There are all sorts of ways to look at the survey data we gathered last October on the TransWilts trains, and one fact I'm particularly interested in is the journey lengths of passengers. I have all the information to hand that I need to work this out - but in different files:
Survey data [here]
|4208||Tcl + Tk (Wish) - an introduction and revision example|
Whenever I teach Tcl with Tk, I'm delighted to be reminded how easy it is to put together a graphic user interface (GUI) with Tcl. They may not be the world's prettiest, but they're quick, straightforward and functional. And so it was on the final day of our Tcl Programming course last week, when I did ...
|2040||Error: Cant read xxxxx: no such variable (in Tcl Tk)|
If you set a Tcl (Tcl/Tk) variable within a proc, or within the callback command of a widget, that variable does not exist at run time until you have run the proc or callback procedure, or until you have initialised the variable in some other way.
Let's see a Tk example. I have created a window with ...
|595||Add a friendly front end with Tk|
With a Tk Graphic User Interface, you can add a friendly look and feel to an application running on your workstation if it's written in Tcl (Tcl/Tk), Perl (Perl/Tk) or Python (TkInter).
Whichever language you build your GUI on to, you'll want to remember
1. Create your components (known as widgets) ...
Examples from our training material
|gui_2|| Classis Tk structure - procs, widgets, geometry ...|
|tk_accesscount|| Tcl/Tk - Access Log File counter!|
|tk_h2|| Report Date Information on a widget|
|tk_hello|| Tcl/Tk - Report Date Information|
|udq|| Widgets, Geometry Managers and Events |
Some modules are available for download
as a sample of our material or under an Open Training Notes License
for free download from [here]
Topics covered in this module
Hello Tcl/Tk World.
Tcl/Tk supported platforms.
Our sample program.
A real application.
Feedback via the Tk window.
Widgets as commands.
A GUI front end to a data file.
The main program.
The setup proc.
The scanner proc.
The complete program.
If you are looking for a complete course and not just a information on a single subject, visit our Listing and schedule
Well House Consultants specialise in training courses in
. We run
throughout the UK (and beyond for longer courses), and
at our training centre in Melksham, Wiltshire, England.
It's surprisingly cost effective to come on our public courses -
even if you live in a different
country or continent to us
We have a technical library of over 700 books on the subjects on which we teach.
These books are available for reference at our training centre.