Although standard Tk doesn't supply a toggle button, and most developers seem content to use a checkbox in its place, Uwe Klein illustrates how easy it is to customize a button by refinement of a label:
set ::state OFF
label .lb -textvariable ::state -relief raised -bd 4
bind .lb <ButtonPress-1> {
if {"$::state" == "OFF"} {
set ::state ON
%W configure -relief sunken
} else {
set ::state OFF
%W configure -relief raised
}
}
label .l -textvariable ::state
pack .lb .l -side left[Comments: all buttons thus; deserves abstraction; backward-compatible only to 8.?]
KPV: tile has something similar--the Toolbutton style for a checkbutton. This is designed for a button bar, so it usually looks better if you have an image in the widget.
package require tile ::ttk::checkbutton .c1 -text "ON" -style Toolbutton pack .c1
MG The Tk checkbutton has very simple support for this feature, too, with the -indicatoron option, which makes it work exactly as a togglebutton.
pack [checkbutton .c -text "Click me" -indicatoron false]
JM 11Feb2011 radiobutton has this option too, so we can have a mutually exclusive set of buttons:
pack [radiobutton .o1 -text A -indicatoron false -variable valor -value A] pack [radiobutton .o2 -text B -indicatoron false -variable valor -value B] pack [radiobutton .o3 -text C -indicatoron false -variable valor -value C]