TCL Grey Checkbuttons -

i have been looking through several online resources trying checkbutton grey out when button selected. however, of attempts, cannot seem work.

the following example @ work: 3 checkboxes called chkall, chkbalanced, , chkfxo. let's when chkall selected , in active state chkbalanced, , chkfxo unchecked. i've tried use if-statement looks @ state of chkall complains having state issue in conditional portion of block. should consider using variables, if how implement them? know checkbuttons have -variable option don't know how use it

if you're trying make exclusive choice, should not using checkbuttons. describing behavior of radiobuttons.

to use radiobuttons create 2 or more , give them same variable. able pick 1 @ time.

foreach value {chkall chkbalanced chkfxo} {     radiobutton .rb-$value -text $value -variable myvar \        -justify left -value $value     pack .rb-$value -side top -fill x -anchor w }