NAME

       ttk::checkbutton - On/off widget

SYNOPSIS

       ttk::checkbutton pathName ?options?

DESCRIPTION

       A  checkbutton  widget  is used to show or change a setting.  It has two states, selected and deselected.
       The state of the checkbutton may be  linked  to  a  Tcl  variable.   -class    -compound -cursor   -image
       -state    -style    -takefocus     -text -textvariable  -underline     -width

OPTIONS

       [-command command]  A  Tcl  script  to  execute whenever the widget is invoked.  [-offvalue offValue] The
       value  to  store  in  the  associated  -variable  when  the  widget  is  deselected.   Defaults   to   0.
       [-onvalue onValue]  The value to store in the associated -variable when the widget is selected.  Defaults
       to 1.  [-variable variable] The name of a global variable whose value is linked to the widget.   Defaults
       to the widget pathname if not specified.

WIDGET COMMAND

       In  addition  to  the  standard  cget,  configure,  instate, and state commands, checkbuttons support the
       following additional widget commands:

       pathname invoke
              Toggles between the selected and deselected states and evaluates the associated -command.  If  the
              widget  is  currently  selected,  sets  the  -variable  to the -offvalue and deselects the widget;
              otherwise, sets the -variable to the -onvalue Returns the result of the -command.

WIDGET STATES

       The widget does not respond to user input if the disabled state is set.  The  widget  sets  the  selected
       state whenever the linked -variable is set to the widget's -onvalue, and clears it otherwise.  The widget
       sets the alternate state whenever the linked -variable is unset.  (The alternate state  may  be  used  to
       indicate a ``tri-state'' or ``indeterminate'' selection.)

SEE ALSO

       widget(n), keynav(n), radiobutton(n)

KEYWORDS

       widget, button, toggle, check, option