Exercises, examples and other material relating to training module T217. This topic is presented on public courses Learning to program in Tcl
, 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 subject||updated|
|4458||A 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 ...
|3575||Multiple buttons calling the same proc in wish (tcl/tk)|
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?
|3415||User 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 ...
|309||Writing 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|
PicturesLearning Tcl/Tk for a custom GUI application
Some modules are available for download
as a sample of our material or under an Open Training Notes License
for free download from http://www.training-notes.co.uk
Topics covered in this module
The button widget.
The pack geometry manager.
Changing how pack works.
More flexible packing.
The parent frame.
The window manager command.
Button presses and other events.
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