Grid is one of several Geometry Managers. Some others are pack and place.
http://www.tcl.tk/man/tcl8.5/TkCmd/grid.htm
If the first argument to grid is suitable as the first slave argument to grid configure, either a window name (i.e., a value starting with “.”) or one of the characters “x” or “^” (see the "RELATIVE PLACEMENT " section in the manual page), then the command is processed in the same way as grid configure.
LV I don't see a note here about the use of grid and pack in the same Tk window. Is that something that is supported?
The Book Practical Programming in Tcl and Tk, Fourth Edition contains an excellent introduction to the grid command, which is available online at [L1 ].
Grid is excellent for many kinds of common GUI forms because it arranges widgets in nice rows and columns, and handles resizing quite nicely.
A simple example is a panel with just a few labels and entries.
package require Tk
foreach field {Name Address City State Phone} {
# Create a couple of widgets
set l [label .lab$field -text $field]
set e [entry .ent$field -justify right ]
# Assign both to a row in the grid
grid $l $e -padx 4 -pady 4
# Then adjust how they appear
grid $l -sticky e
grid $e -sticky ew
}
# X-resize is done by the entry column
grid columnconfigure . 1 -weight 1
# Y-resize should be at the bottom...
set lastrow [lindex [grid size .] 1]
grid rowconfigure . [expr $lastrow - 1] -weight 1For a little more complex example, see A little spreadsheet.
On comp.lang.tcl, [L2 ] describes how a change between Tk 8.4 and 8.5 causes code which depends on the grid default behavior may need to be modified. The specific example is the iwidgets disjointlistbox, but other code may find the same issue.
DKF - The term Grid also refers to the very high end of resource sharing systems over the internet which it is likely that people will be hearing a lot more about in the future, especially in phrases like Grid Services...
TclGlobus is a project to allow Grid interfaces in Tcl: http://tclglobus.ligo.caltech.edu/