Re: I am failing to get a hide/show dialog to show more than once

[snip]

Based on your idea of using winfo exists I've now refined the on_options
proc to this:

proc test::on_options {} {
    if {![winfo exists .optionsForm]} {
        puts "on_options init"
        toplevel .optionsForm
        set on_close [lambda {} {dialog hide .optionsForm}]
        wm title .optionsForm "Options — [tk appname]"
        ttk::label .optionsForm.label -text "Options go here"
        grid .optionsForm.label -row 0 -column 0
        ttk::button .optionsForm.closeButton -text Close -command
$on_close
        grid .optionsForm.closeButton -row 1 -column 0
        wm protocol .optionsForm WM_DELETE_WINDOW $on_close
        bind .optionsForm <Escape> $on_close
        dialog prepare .optionsForm
    }
    puts on_options
    dialog show .optionsForm
}