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################################################################################
# pref: defines the layout and functions of the user preferences
#       dialog box.
proc pref {} {
  global LABELFONT prefDialogBox activeWindow SERVER_HOSTS XTERM \
	timeout_secs RSH

  busy_cursor
## Bring up the standard Dialog box ##
  set prefDialogBox ".pref"
  set dbox [popupDialogBox $prefDialogBox "User Preferences Dialog"]
  set activeWindow($prefDialogBox) 1
  set dbox_top    [lindex $dbox 0]
  set dbox_bottom [lindex $dbox 1]


## TOP PART ##
  frame $dbox_top.header -height 10m -width 10m
  frame $dbox_top.footer -height 10m -width 10m

  frame $dbox_top.a
  frame $dbox_top.a.main
  set servers [buildFullEntrybox $dbox_top.a.main 17 \
                        "Server Hosts:" 30 "" "right" 0]
  set serversFrame [lindex $servers 0]
  set serversEntry [lindex $servers 2]
  $serversEntry configure -textvariable SERVER_HOSTS

  frame $dbox_top.a.xterm
  set xterm [buildFullEntrybox $dbox_top.a.xterm 17 \
                        "Xterm command" 30 "" "right" 0]
  set xtermFrame [lindex $xterm 0]
  set xtermEntry [lindex $xterm 2]
  $xtermEntry configure -textvariable XTERM

  frame $dbox_top.a.rsh
  set rsh [buildFullEntrybox $dbox_top.a.rsh 17 \
                        "RSH command" 30 "" "right" 0]
  set rshFrame [lindex $rsh 0]
  set rshEntry [lindex $rsh 2]
  $rshEntry configure -textvariable RSH

  frame $dbox_top.a.secs
  set spinBox [buildSpinbox $dbox_top.a.secs 4 1-9999 timeout_secs "" \
        "wait timeout secs: " left ""]
  set secsFrame  [lindex $spinBox 0]
  set secsEntry  [lindex $spinBox 1]

## BOTTOM PART ##
  set cmdButtons \
  [buildCmdButtons $dbox_bottom {{{ok ok} {help help}}} x 2m 18 3]

  set cmdFrame  [lindex $cmdButtons 0]
  set cmdOk     [lindex $cmdButtons 1]
  set cmdHelp   [lindex $cmdButtons 2]

  $cmdOk configure -command {
     if { [string compare $SERVER_HOSTS ""] == 0 } {
       popupInfoBox $prefDialogBox "Please specify a server host value"
       return
     }
     if { [string compare $timeout_secs ""] == 0 } {
       popupInfoBox $prefDialogBox "Please specify a value for wait timeout secs"
       return
     }
     if { [string compare $XTERM ""] == 0 } {
       popupInfoBox $prefDialogBox "Please specify xterm command"
       return
     }

    destroy $prefDialogBox
  }
  $cmdHelp configure -command {xpbs_help preferences $prefDialogBox}

  register_default_action $serversEntry $cmdOk
  register_default_action $secsEntry $cmdOk
  register_default_action $xtermEntry $cmdOk
  register_default_action $rshEntry $cmdOk
  register_default_action $prefDialogBox $cmdOk

  pack $dbox_top.header $dbox_top.a $dbox_top.footer -padx 5m
  pack $dbox_top.a.main \
       $dbox_top.a.secs \
       $dbox_top.a.xterm \
       $dbox_top.a.rsh -side top -anchor nw -pady 2m

  tkwait visibility $prefDialogBox
  remove_busy_cursor

  catch {tkwait window $prefDialogBox}
  set activeWindow($prefDialogBox) 0
}