diff options
Diffstat (limited to 'man/9/variable')
| -rw-r--r-- | man/9/variable | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/man/9/variable b/man/9/variable new file mode 100644 index 00000000..b1bcc141 --- /dev/null +++ b/man/9/variable @@ -0,0 +1,25 @@ +.TH VARIABLE 9 +.SH NAME +variable \- interrogate a button variable +.SH SYNOPSIS +\f5variable \fIvar\fR ?\fIvalue\fR? +.SH DESCRIPTION +.B Variable +queries or sets the value of a Tk radiobutton, checkbutton or choicebutton variable. +An error diagnostic will be returned if +the variable is of the wrong type (if for instance +it is the name of a named channel). +.PP +If \fIvalue\fR is given, the value of the variable is set +to that value, and any associated buttons +will subsequently reflect this in their appearance. +Omitting the \fIvalue\fR argument returns the current value of the variable. +.PP +The special variable +.B lasterror +holds the text of the last Tk error encountered. +It resets when queried. +.SH SEE ALSO +.IR checkbutton (9) +.IR choicebutton (9) +.IR radiobutton (9), |