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    <p>Here's a more complete example using fileevents. This will auto-scroll all the time. For usability purposes you probably only want to auto-scroll if the bottom of the text is visible (ie: if the user hasn't moved the scrollbar) but I'll leave that as an exercise for the reader to keep this already long example from getting any longer.</p> <pre><code>package require Tk proc main {} { if {[lsearch -exact [font names] TkDefaultFont] == -1} { # older versions of Tk don't define this font, so pick something # suitable font create TkDefaultFont -family Helvetica -size 12 } # in 8.5 we can use {*} but this will work in earlier versions eval font create TkBoldFont [font actual TkDefaultFont] -weight bold buildUI } proc buildUI {} { frame .toolbar scrollbar .vsb -command [list .t yview] text .t \ -width 80 -height 20 \ -yscrollcommand [list .vsb set] \ -highlightthickness 0 .t tag configure command -font TkBoldFont .t tag configure error -font TkDefaultFont -foreground firebrick .t tag configure output -font TkDefaultFont -foreground black grid .toolbar -sticky nsew grid .t .vsb -sticky nsew grid rowconfigure . 1 -weight 1 grid columnconfigure . 0 -weight 1 set i 0 foreach {label command} { date {date} uptime {uptime} ls {ls -l} } { button .b$i -text $label -command [list runCommand $command] pack .b$i -in .toolbar -side left incr i } } proc output {type text} { .t configure -state normal .t insert end $text $type "\n" .t see end .t configure -state disabled } proc runCommand {cmd} { output command $cmd set f [open "| $cmd" r] fconfigure $f -blocking false fileevent $f readable [list handleFileEvent $f] } proc closePipe {f} { # turn blocking on so we can catch any errors fconfigure $f -blocking true if {[catch {close $f} err]} { output error $err } } proc handleFileEvent {f} { set status [catch { gets $f line } result] if { $status != 0 } { # unexpected error output error $result closePipe $f } elseif { $result &gt;= 0 } { # we got some output output normal $line } elseif { [eof $f] } { # End of file closePipe $f } elseif { [fblocked $f] } { # Read blocked, so do nothing } } main </code></pre>
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    1. USBryan Oakley
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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