itcl/itk 2.2 + scotty 2.1.5 bgerror overlay problem

Bernd Hentig (bernd@finow.snafu.de)
Fri, 11 Jul 1997 12:50:45 +0100 (WET DST)

Hi.
When using scotty 2.1.5 together with itcl/itk2.2 the itk widget "bgerror"
(which is in the auto_load path of itk) will be overlayed by the scotty
bgerror procedure in file init.tcl.
The offending code segement is:

if {[info commands bgerror] == ""} {
proc bgerror {msg} {
global errorInfo
puts stderr $errorInfo
}
}

This code will not work reliably with dynamic loadable extensions/procedures
because some commands may still be "unknown" at the time of scotty package
initialization, so the native bgerror widget from itk is redefined here.
To resolve this problem, I suggest to preload any unknown commands before
querying their existence:

catch {auto_load bgerror}
if {[info commands bgerror] == ""} {
proc bgerror {msg} {
global errorInfo
puts stderr $errorInfo
}
}

Perhaps you may incorporate this fix into scotty 2.2.x ?
Bernd

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