Exercises, examples and other material relating to training module T220. This topic is presented on public courses Learning to program in Tcl
, Tcl Programming
The default geometry managers (pack, grid, gridbag and place) become powerful tools when you nest frames, or create new top level frames to turn your application multi-window. This module also covers some further widgets such as scales and message boxes.
|Articles and tips on this subject||updated|
|4459||Managing the window size (and layout) in Tcl/Tk|
Complex window layouts are comprised in a series of simple window layouts nested within each other - as an example I wrote today on our Tcl/Tk course. You can see a capture of this display in with this article.
The buttons on the left are in a frame of their own, and the graphic area ("Canvas") across ...
|1471||Cliff Lift simulator- Lynton to Lynmouth - in Tcl/Tk|
In Tk, you can use the variable option to a slider and the textvariable option to a label or button (or some other widgets) to 'project' the value of a variable onto the display - either changing the text on a button, or moving a slider automatically when some value changes otherwise within the code.
|1335||Expanding a grid - Tcl/Tk|
Have you ever tried to fill or expand a grid in Tcl/Tk to fill the available space left by wider or taller widgets to the die, or when the window expands, and got results like those I have posted here? Disappointing results, aren't they? And I appear to have done all that I should in the source too:
|787||Tk - laying out your GUI with frames, pack and grid|
Using Tk (in Tcl or in Perl), you create a number of components that you want to display as part of your GUI (Graphic User Interface) using commands such as button, label and canvas. These components are known as widgets.
Once you've created your widgets, you need to use a geometry manager to tell ...
Examples from our training material
|clifflift|| Tcl/Tk - Scales linked like a cliff lift|
|linedisplay|| Display with frames, canvas, window manager|
|sltvtl|| Slider, text variable and pop up|
|tk_frames|| Nested frames - first completed example|
|tk_fvar_1|| Tk frames using variables to allow extra flexibility|
|tk_fvar_2|| Tk frames - flexibility of layout |
|tk_ru2|| Tcl/Tk - Are you sure window using a message widget|
|tk_rusure|| Tk - popup box to ask "are you sure" written using Tk basics|
|tk_sc2|| Tk scales with variable feedback|
|tk_scale|| Tcl/Tk - First Scales|
|tls|| Scrolling a canvas (canvas, scrollbar, toplevel, frame, grid)|
|willie|| Check buttons - defaulting to be selected or not|
PicturesDesigning your GUI - Tk
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 outer frame.
The first inner frame.
The second inner frame.
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