# ----------------------------------------------------------------------
#  EXAMPLE: using inheritance to specialize mega-widgets
# ----------------------------------------------------------------------
#  COURSE:  Object-Oriented Programming with [incr Tcl]
#  AUTHOR:  Michael J. McLennan, Bell Labs Innovations
# ======================================================================
#               Copyright (c) 1996  Lucent Technologies
# ======================================================================

option add *MessageInfo.title "Notice" widgetDefault

class MessageInfo {
    inherit Info

    constructor {args} {
        itk_component add message {
            label $itk_interior.mesg -width 20
        } {
            usual
            rename -text -message message Text
        }
        pack $itk_component(message) -expand yes -fill both
        bind $itk_component(message) <Configure> [code $this resize]

        eval itk_initialize $args
    }

    private method resize {} {
        set w [winfo width $itk_component(message)]
        if {$w > 1} {
            $itk_component(message) configure -wraplength $w
        }
    }
}

usual MessageInfo {
    keep -background -cursor -foreground -font
    keep -activebackground -activeforeground -disabledforeground
    keep -highlightcolor -highlightthickness
}