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 Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own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))
In a Tk appllication, you'll define a number of widgets (components) that you want in your GUI - your "Graphic User Interface". That's all very well and good, but you'll also want to arrange them neatly and you'll do this with a geometry manager. of which there are three.
geometry manager adds widgets to your window from either side, or from the top and bottom, one at a time - so they form a single row or column. The place
geometry manager places widgets at a specific offset within the frame and is the least commonly used of the three by a long way. The grid
geometry manager allows you to place whole rows and columns of components in a grid.
With the grid geometry manager, all the cells in a row have to be the same height and all the cells in a column have to be the same width. Otherwise it just wouldn't BE a grid. So how does Tk handle individual component size variation?
By default, each column is made as wide as the widest component in it, and each row is made as tall as the tallest component. Smaller components are then centred in their cells, with the space (padding) distributed equally around all four sides.
If you don't want the space evenly distributed, you can use the -sticky option on your grid command to stick the component to the various sides ...
N - Stick to the top (North)
S - Stick to the bottom (South)
E - Stick to the right (East)
W -Stisck to the left (West).
For example -sticky NW
will place the widget in the top right corner of its cell.
To stretch a widget, you may specify that it's to stick to two opposite sides, and to stretch it to fill the cell you can stick it to all four sides - thus -sticky news (written 2005-09-15, updated 2006-06-05)
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articlesT218 - Tcl/Tk - Geometry Managers 
Tcl/Tk (wish) Grid layout example - (2005-02-12) 
Tk - laying out your GUI with frames, pack and grid - (2006-06-30) 
Expanding a grid - Tcl/Tk - (2007-09-07) 
Tk locks up - 100% c.p.u. on a simple program (Tcl, Perl, Python) - (2007-09-09) 
fill and expand on Tcl/Tk pack command - (2007-12-13)
Some other Articles
Matching in MySQLOut of the norm.Tomorrow's meeting.Up earlySticky newsDatabase or Progamming - which to learn first?Server side scripting of styles to suit the browserHow far away is that server?Upgrade!You cant
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