Eskil

    # Create window
    destroy $wt
    toplevel $wt -padx 3 -pady 3
    ttk::frame $wt._bg
    place $wt._bg -x 0 -y 0 -relwidth 1.0 -relheight 1.0 -border outside
    wm title $wt "Preferences: Plugins"

















    ttk::notebook $wt.tab
    ttk::frame $wt.tab.plus
    $wt.tab add $wt.tab.plus -text "+"
    set n [llength [array names ::eskil $top,pluginname,*]]
    if {$n < 1} { set n 1 }







    for {set t 0} {$t < $n} {incr t} {
        EditPrefPluginsAddTab $top $dirdiff
    }






    $wt.tab select 0
    bind $wt.tab <<NotebookTabChanged>> \


            [list EditPrefPluginsChangeTab $top $dirdiff]




    bind $wt.tab <ButtonPress-3> \




            [list EditPrefPluginsRightClick $top $dirdiff %x %y %X %Y]






    ttk::frame $wt.fb -padding 3
    ttk::button $wt.fb.b1 -text "Ok"   \
            -command [list EditPrefPluginsOk $top $wt 0]
    ttk::button $wt.fb.b2 -text "Apply" \
            -command [list EditPrefPluginsOk $top $wt 1]
    ttk::button $wt.fb.b3 -text "Cancel" -command [list destroy $wt]
    set ::widgets($top,prefPluginsOk) $wt.fb.b1

    grid $wt.fb.b1 x $wt.fb.b2 x $wt.fb.b3 -sticky we
    grid columnconfigure $wt.fb {0 2 4} -uniform a
    grid columnconfigure $wt.fb {1 3} -weight 1

    grid $wt.tab -sticky news -padx 3 -pady 3
    grid $wt.fb  -sticky we   -padx 3 -pady 3
    grid columnconfigure $wt 0 -weight 1
    grid row             $wt 0 -weight 1

}

# Detect a plugin tab change to add tab when "+" is selected.
proc EditPrefPluginsChangeTab {top dirdiff} {
    set wt $top.prefplugin.tab
    set n [$wt index end]
    set t [$wt index [$wt select]]

    if {$t + 1 == $n} {
        # Plus selected
        EditPrefPluginsAddTab $top $dirdiff
        $wt select $t
    }
}

# Context menu
proc EditPrefPluginsRightClick {top dirdiff x y X Y} {
    set wt $top.prefplugin.tab
    set elem [$wt identify element $x $y]
    set t [$wt identify tab $x $y]
    if {$elem eq "" || ![string is integer -strict $t]} return

    set m [winfo toplevel $wt].pm
    destroy $m
    menu $m
    set n [$wt index end]

    $m add command -label "Add left" \
            -command [list EditPrefPluginsAddTab $top $dirdiff $t]
    if {$t > 0 && $t < ($n - 1)} {
        $m add command -label "Move left" \
                -command [list EditPrefPluginsMoveLeft $top $t]
    }
    tk_popup $m $X $Y
}

# Move a tab to the left
proc EditPrefPluginsMoveLeft {top pos} {
    set wt $top.prefplugin.tab
    set win [lindex [$wt tabs] $pos]
    incr pos -1
    $wt insert $pos $win
}

# Add a tab to plugin prefernces
proc EditPrefPluginsAddTab {top dirdiff {pos {}}} {
    set wt $top.prefplugin.tab
    set n [$wt index end]
    if {$pos eq "" || $pos >= ($n - 1)} {
        # Since the "+" tab is last, the index is n for any new one
        set pos [expr {$n - 1}]
    }
    ttk::frame $wt.f,$n
    $wt insert $pos $wt.f,$n -text "Plugin"

    set wt $wt.f,$n

    set plugins [listPlugins]
    if {[llength $plugins] == 0} {
        grid [ttk::label $wt.l -text "No plugins found."] - -padx 3 -pady 3
    }
    if {![info exists ::eskil($top,pluginname,$n)]} {
        set ::eskil($top,pluginname,$n) ""
    }
    if {![info exists ::eskil($top,plugininfo,$n)]} {
        set ::eskil($top,plugininfo,$n) ""
    }
    if {![info exists ::eskil($top,pluginallow,$n)]} {
        set ::eskil($top,pluginallow,$n) 0
    }
    set ::eskil($top,edit,pluginname,$n) $::eskil($top,pluginname,$n)
    set ::eskil($top,edit,plugininfo,$n) $::eskil($top,plugininfo,$n)
    set ::eskil($top,edit,pluginallow,$n) $::eskil($top,pluginallow,$n)

    ttk::labelframe $wt.lfs -text "Select"
    grid columnconfigure $wt.lfs 1 -weight 1

    set t 0
    foreach {plugin info} $plugins {
        set descr [dict get $info descr]
        if {$dirdiff && ![dict get $info dir]} continue
        ttk::radiobutton $wt.rb$t -variable ::eskil($top,edit,pluginname,$n) \
                -value $plugin -text $plugin
        ttk::label $wt.l$t -text $descr -anchor w
        grid $wt.rb$t $wt.l$t -in $wt.lfs -sticky we -padx 3 -pady 3
        incr t
    }
    ttk::radiobutton $wt.rb$t -variable ::eskil($top,edit,pluginname,$n) \
            -value "" -text "No Plugin"
    ttk::button $wt.bs -text "Show" \
            -command "ShowPlugin $wt \$::eskil($top,edit,pluginname,$n)"
    addBalloon $wt.bs "Show plugin source code."
    grid $wt.rb$t $wt.bs -in $wt.lfs -sticky we -padx 3 -pady 3
    grid $wt.bs -sticky e

    ttk::labelframe $wt.lfgc -text "Generic Configuration"
    grid columnconfigure $wt.lfgc 1 -weight 1

    ttk::label $wt.li -text "Info" -anchor w
    addBalloon $wt.li "Info passed to plugin. Plugin specific."
    ttk::entry $wt.ei -textvariable ::eskil($top,edit,plugininfo,$n)
    grid $wt.li $wt.ei -in $wt.lfgc -sticky we -padx 3 -pady 3

    ttk::checkbutton $wt.cb -text "Privilege" \
            -variable ::eskil($top,edit,pluginallow,$n)
    addBalloon $wt.cb "Run plugin with raised privileges"
    grid $wt.cb -  -in $wt.lfgc -sticky w -padx 3 -pady 3

    ttk::labelframe $wt.lfsc -text "Specific Configuration"
    set ::widgets($top,prefPluginsSpec,$n) $wt.lfsc
    trace add variable ::eskil($top,edit,pluginname,$n) write \
            [list UpdateSpecificPluginConf $top $n]
    UpdateSpecificPluginConf $top $n

    grid $wt.lfs  -sticky we -padx 3 -pady 3
    grid $wt.lfgc -sticky we -padx 3 -pady 3
    grid $wt.lfsc -sticky we -padx 3 -pady 3

    grid columnconfigure $wt 0 -weight 1
}

# When a new plugin is selected, update the list of specific options.
# "args" is needed to swallow the extra variable trace args.
proc UpdateSpecificPluginConf {top n args} {
    set w $::widgets($top,prefPluginsSpec,$n)
    # If the dialog is closed w might not exist
    if {![winfo exists $w]} return
    eval destroy [winfo children $w]

    set arg $::eskil($top,edit,pluginname,$n)
    set pOpts {}
    if {$arg ne ""} {
        set res [LocatePlugin $arg]
        set pOpts [dict get $res opts]
    }
    # Look for declarations of command line options
    set t 0
    set ::eskil($top,edit,opts,$n) $pOpts
    foreach {name flag doc} $pOpts {
        ttk::label $w.l$t -text $name
        addBalloon $w.l$t $doc
        grid $w.l$t -sticky "w" -padx 3 -pady 3
        if {$flag} {
            ttk::checkbutton $w.s$t -text "On" \
                    -variable ::eskil($top,edit,$name,$n)
            grid $w.s$t -row $t -column 1 -sticky "w" -padx 3 -pady 3
        } else {
            ttk::entry $w.s$t \
                    -textvariable ::eskil($top,edit,$name,$n)
            grid $w.s$t -row $t -column 1 -sticky we -padx 3 -pady 3
        }
        incr t
    }
    grid columnconfigure $w 1 -weight 1
    if {$t == 0} {
        ttk::label $w.l -text "No specific configuration"
        grid $w.l -sticky "w" -padx 3 -pady 3
        return
    }
}

# Ok or Apply pressend in Plugin Preference
proc EditPrefPluginsOk {top wt apply} {
    # Compress plugin info in tab order
    set allN {}
    foreach win [$wt.tab tabs] {
        set n [lindex [split $win ","] end]
        if {![string is integer -strict $n]} continue
        # Find all used.
        if {$::eskil($top,edit,pluginname,$n) ne ""} {
            lappend allN $n
        }
    }
    if {[llength $allN] == 0} {
        lappend allN 1
    }

    # Keep the dialog if we are only applying
    if {!$apply} {
        destroy $wt
    }

    # Transfer them to consecutive numbers
    set t 1
    foreach n $allN {
        set ::eskil($top,pluginname,$t)  $::eskil($top,edit,pluginname,$n)
        set ::eskil($top,plugininfo,$t)  $::eskil($top,edit,plugininfo,$n)
        set ::eskil($top,pluginallow,$t) $::eskil($top,edit,pluginallow,$n)
        incr t
    }
    # Remove any old
    foreach item [array names ::eskil $top,pluginname,*] {
        set n [lindex [split $item ","] end]
        if {$n >= $t} {
            unset ::eskil($top,pluginname,$n)
            set ::eskil($top,plugininfo,$n) ""
            set ::eskil($top,pluginallow,$n) 0
        }
    }

    # TBD PLUGIN: Actually use multiple
    if {$::eskil($top,pluginname,1) ne ""} {
        set pinterp [createPluginInterp $::eskil($top,pluginname,1) \
                             $::eskil($top,plugininfo,1) \
                             $::eskil($top,pluginallow,1) pinfo]
    } else {
        set pinterp ""
        set pinfo ""
    }
    set ::eskil($top,plugin) $pinterp
    set ::eskil($top,pluginpinfo) $pinfo
    set ::eskil($top,pluginargv) {}
    foreach {name flag doc} $::eskil($top,edit,opts,1) {
        if {$flag} {
            if {[info exists ::eskil($top,edit,$name,1)] && \
                        $::eskil($top,edit,$name,1)} {
                lappend ::eskil($top,pluginargv) $name
            }
        } else {
            if {[info exists ::eskil($top,edit,$name,1)] && \
                        $::eskil($top,edit,$name,1) ne ""} {
                lappend ::eskil($top,pluginargv) $name \
                        $::eskil($top,edit,$name,1)
            }
        }
    }
}

# Put Tcl code in a text widget, with some syntax highlighting
proc TextViewTcl {t data} {