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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
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 just half an hour on Tk and wish.

* At the start of your code, define procedures that are to be performed when buttons are pressed or data is entered in some other way

* Define the components of your GUI, including a note of which function each is linked to

* Define the layout - how the components are drawn in relationship to each other and to the window in which they appear

... and that can be about it!

The example shown here is three concurrent runs of a GUI with a simple increment / decrement counter that's also changing the colour of the targeted label on the interface. A simple but effective demonstration.

Full source code is [here].

(written 2013-11-15, updated 2013-11-16)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
T248 - Tcl/Tk - A Review of Tcl and Tk Basics
  [1092] Tcl training - often for a larger group - (2007-02-24)
  [1174] Installing Tcl and Expect on Solaris 10 - a checklist - (2007-05-02)
  [1181] Good Programming practise - where to initialise variables - (2007-05-09)
  [1469] Curley brackets v double quotes - Tcl, Tk, Expect - (2007-12-12)

T216 - Tcl/Tk - Introduction to Tk
  [595] Add a friendly front end with Tk - (2006-02-08)
  [2040] Error: Cant read xxxxx: no such variable (in Tcl Tk) - (2009-02-14)
  [4460] Using Object Oriented Tcl and the Tk toolkit together - real life example - (2015-03-12)


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Python functions - an introduction to how they work
Handling JSON in Python (and a csv, marshall and pickle comparison)
If elif elif elif - multiway selection in Python
Lists in Tcl - fundamentals in a commented source code example
Tcl + Tk (Wish) - an introduction and revision example
Exception handling in Tcl
Writing the perfect program in Tcl?
Regular Expression Substitution - Tcl
With the Shpigs and Donkeys
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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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