'\"
'\" Generated from file 'observe\&.n\&.man' by tcllib/doctools with format 'nroff'
'\" Copyright (c) Jeffrey Hobbs <jeff at hobbs\&.org>
'\"
.TH "observe" 3tk 2\&.5  "TkCon"
.\" The -*- nroff -*- definitions below are for supplemental macros used
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.BS
.SH NAME
observe \- Runtime debugging output in TkCon
.SH SYNOPSIS
\fBobserve\fR \fIcommand\fR \fIcmdname\fR ?\fImaxlevel\fR?
.sp
\fBobserve\fR \fIcdelete\fR \fIcmdname\fR
.sp
\fBobserve\fR \fIcinfo\fR \fIcmdname\fR
.sp
\fBobserve\fR \fIvariable\fR \fIvarname\fR \fIoperation\fR ?\fIargs\fR?
.sp
\fBobserve\fR \fIvdelete\fR \fIvarname\fR \fIoperation\fR
.sp
\fBobserve\fR \fIvinfo\fR \fIvarname\fR
.sp
.BE
.SH DESCRIPTION
.PP
This command provides runtime debugging output for variables
and commands without the need to edit your code\&.
For variables, the underlying mechanism uses \fBtrace\fR and \fBdump\fR var\&.
For commands, it renames the observed procedure and uses a
special wrapper procedure\&.
WARNING: using this procedure after checkpointing state will
result in major problems if you clean state because the
renamed (true) commands will be lost\&.
.PP
This procedure is experimental\&.
Comments are encouraged\&.
.TP
\fBobserve\fR \fIcommand\fR \fIcmdname\fR ?\fImaxlevel\fR?
This will create a wrapper command which prints out (using \fBdump\fR)
the call stack to the console\&.
maxlevel represents the maximum number of levels of the call
stack which will be printed (defaults to 4)\&.
.TP
\fBobserve\fR \fIcdelete\fR \fIcmdname\fR
Removes the wrapper around an observed command\&.
.TP
\fBobserve\fR \fIcinfo\fR \fIcmdname\fR
Prints out useless info\&.
.TP
\fBobserve\fR \fIvariable\fR \fIvarname\fR \fIoperation\fR ?\fIargs\fR?
Currently a wrapper around trace that uses \fBdump\fR to print out
the value of the named variable whenever the specified
operation on that variable occurs (must be \fIread\fR, \fIwrite\fR or \fIunset\fR)\&.
.TP
\fBobserve\fR \fIvdelete\fR \fIvarname\fR \fIoperation\fR
Deletes the trace wrapper around the named variable\&.
.TP
\fBobserve\fR \fIvinfo\fR \fIvarname\fR
Prints out trace info about the named variable\&.
.PP
.SH "SEE ALSO"
\fBdump\fR(3tk), \fBidebug\fR(3tk), \fBtkcon\fR(1), \fBtkcon\fR(3tk), \fBtkconrc\fR(5)
.SH KEYWORDS
Tk, console, debug
.SH COPYRIGHT
.nf
Copyright (c) Jeffrey Hobbs <jeff at hobbs\&.org>

.fi