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For 2023 - 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 Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own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))

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Tcl/Tk module T217
First Widgets, Geometry and Events
Exercises, examples and other material relating to training module T217. This topic is presented on public courses Learning to program in Tcl, Tcl/Tk, Tcl Programming

Tk programming is all about widgets, geometry managers and events. This module introduces you to each of these concepts, then examines one particular widget type, one particular geometry manager, and one particular type of event to a level where you can write your first useful GUI under Tk.

Articles and tips on this subjectupdated
4458A new Tcl/tk example - a window to show system status
From today's Tcl course - where we have also added a GUI on the front using Tk to give a window in which we display system information. The code is divided into a number of sections 1. Definition of pieces of code to be run in the event of a button being pushed, or some other action 2. Creation of ...
3575Multiple buttons calling the same proc in wish (tcl/tk)
Question: 1. I have created a table dynamically using a for loop in Tcl/Tk. 2. One of the columns in the table is a column of buttons 3. All the buttons call the same action proc as the each do something similar How can I set up the buttons so that I know which was pressed in the action proc? Answer: Pass ...
3415User defined sorting and other uses of callbacks in Tcl and Tk
When I output a table of results, I usually want it to be sorted in some way. In Tcl, I can use lsort to sort a list - there's an example of it running in a default way [here]. However, there's often a need to order records according to a non-default algorithm, and there are switches such as -integer ...
309Writing a Tcl/Tk GUI is as easy as baking a cake
Designing a Graphic User Interface in Tcl/Tk is rather like writing a recipe. With a recipe, you start off by listing the ingredients you need ... and in Tk you start off by defining your components (a.k.a. widgets). With a recipe, you proceed to describe how the ingredients should be combined ... ...
Examples from our training material
admin   Tk GUI to provide system state reporting box
colmat   Sample answer 1 - coloured labels and layout question
colmat2   Sample answer 3 in development
colmat3   Sample answer 3 - Completed layout question
deferintk   Deferred execution can cause a problem in Tk
tk_b1   Tcl/Tk - button test 1
tk_b2   Tcl/Tk - button test 2
tk_b3   Tk - attributes of a button
tk_b4   Tcl/Tk - button states
tk_event   Tcl/Tk - Event demo
tk_wm   Tcl/Tk - First Frame
Learning Tcl/Tk for a custom GUI application
Background information
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
The button widget.
Design notes.
The pack geometry manager.
Changing how pack works.
More flexible packing.
Frame hierarchy.
The parent frame.
The window manager command.
Button presses and other events.
Complete learning
If you are looking for a complete course and not just a information on a single subject, visit our Listing and schedule page.

Well House Consultants specialise in training courses in Tcl/Tk, Expect,Ruby, Lua, Python, Perl, PHP, and MySQL. We run Private Courses throughout the UK (and beyond for longer courses), and Public Courses 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.

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