Eskil

    variable AfterId ""
    variable DebugCh ""
    variable DebugTime {}
    variable PauseBgProcessing 0
    variable ScheduledRestart 0
    variable AfterTime 1
    variable WorkTime 200
    variable IdleQueue {}
    variable IdleQueueArr
    variable NodeStatus
    variable leftMark ""
    variable rightMark ""
    variable leftDir ""
    variable rightDir ""
    variable protect {left 0 right 0}

    constructor {args} {

        if {$d1 eq $d2} {
            $tree cellconfigure $topIndex,structure -text $d1
        } else {
            $tree cellconfigure $topIndex,structure -text "$d1 vs $d2"
        }
        $tree cellconfigure $topIndex,structure -image $::img(open)
        $tree rowattrib $topIndex type directory
        set NodeStatus($topIndex) ""
        $self SetNodeStatus $topIndex empty
        $tree rowattrib $topIndex leftfull $leftDir
        $tree rowattrib $topIndex rightfull $rightDir

        $self UpdateDirNode $topIndex
    }

    method PruneEqual {} {
        $self busyCursor
        set todo [$tree childkeys root]
        while {[llength $todo] > 0} {
            set todoNow $todo
            set todo {}
            foreach node $todoNow {
                set status [$tree rowattrib $node status]
                set status $NodeStatus($node)
                if {$status eq "equal"} {
                    $tree delete $node
                } else {
                    lappend todo {*}[$tree childkeys $node]
                }
            }
        }

            }
            if {$sts} {
                lappend errors $node $err
                break
            }
            # Work for at least 200 ms to keep things efficient
            set post [clock clicks -milliseconds]
            #puts "$pre $post [expr {$post - $pre}]"
            if {($post - $pre) > 200} break
            if {($post - $pre) > $WorkTime} break
        }
        #if {($post - $pre) > 1000} {
            #puts "[expr $post - $pre] ms for [$tree set $node leftfull]"
        #}

        # Update the status variable to track progress
        if {$options(-statusvar) ne ""} {

            set statusvar ""
            set AfterId ""
        }
    }

    method SetNodeStatus {node status} {
        variable color
        set old [$tree rowattrib $node status]
        set old $NodeStatus($node)
        if {$old eq $status} return
        $tree rowattrib $node status $status
        set NodeStatus($node) $status
        $tree rowconfigure $node -foreground $color($status) \
                -selectforeground $color($status)
        #puts "Set [$tree item $node -text] to $status"

        # Loop through children to update parent
        set parent [$tree parentkey $node]
        if {$parent eq "" || $parent eq "root"} { return }

        # If this is only present on one side, there is no need to update
        set lf [$tree rowattrib $parent leftfull]
        set rf [$tree rowattrib $parent rightfull]
        if {$lf eq "" || $rf eq ""} { return }

        # If parent is being filled, do not update yet
        if {[$tree rowattrib $parent status] eq "unknown2"} {
        if {$NodeStatus($parent) eq "unknown2"} {
            return
        }
        set pstatus equal
        foreach child [$tree childkeys $parent] {
            set status [$tree rowattrib $child status]
            set status $NodeStatus($child)
            switch $status {
                unknown - unknown2 {
                    set pstatus unknown
                }
                new - old - change {
                    set pstatus change
                    break
                }
            }
        }
        $self SetNodeStatus $parent $pstatus
    }

    method UpdateDirNode {node} {
        if {[$tree rowattrib $node type] ne "directory"} {
            return
        }
        if {[$tree rowattrib $node status] ne "empty"} {
        if {$NodeStatus($node) ne "empty"} {
            #puts "Dir [$tree set $node leftfull] already done"
            return
        }
        $tree delete [$tree childkeys $node]

        set leftfull [$tree rowattrib $node leftfull]
        set rightfull [$tree rowattrib $node rightfull]

            # TODO: Configurable large file value?
            if {$size1 > 1000000 && $size2 > 1000000} {
                set largeFile 1
            }
        }
        set id [$tree insertchild $node end $values]
        $tree rowattrib $id type $type
        $tree rowattrib $id status unknown
        set NodeStatus($id) unknown
        $tree rowattrib $id leftfull $df1
        $tree rowattrib $id rightfull $df2
        $tree rowattrib $id largefile $largeFile
        if {$type ne "directory"} {
            if {$type eq "link"} {
                $tree cellconfigure $id,structure -image $::img(link)
            } else {

            $self SetNodeStatus $id new
        } elseif {$size2 == ""} {
            $self SetNodeStatus $id old
        } else {
            $self SetNodeStatus $id unknown
            $self AddNodeToIdle $id
        }
        return [$tree rowattrib $id status]
        return $NodeStatus($id)
    }

    method addCmdCol {tbl row col w} {
        variable widgets
        set key [$tree getfullkeys $row]
        set status [$tree rowattrib $row status]
        set status $NodeStatus($key)
        set type   [$tree rowattrib $row type]
        set lf [$tree rowattrib $row leftfull]
        set rf [$tree rowattrib $row rightfull]
        set bg [$tbl cget -background]
        ttk::style configure Apa.TFrame -background $bg
        ttk::style configure Apa.My.Toolbutton -background $bg
        ttk::frame $w -style Apa.TFrame