incr idx
        }
        if { $idx != $data(base) } {
            set data(base) $idx
            _redraw $path
        }
    }
}


# ---------------------------------------------------------------------------
#  Command NoteBook::page
# ---------------------------------------------------------------------------
proc NoteBook::page { path first {last ""} } {
    variable $path
    upvar 0  $path data

    if { $last == "" } {
        return [lindex $data(pages) $first]
    } else {
        return [lrange $data(pages) $first $last]
    }
}


# ---------------------------------------------------------------------------
#  Command NoteBook::pages
# ---------------------------------------------------------------------------
proc NoteBook::pages { path {first ""} {last ""}} {
    variable $path
    upvar 0  $path data

    if { ![string length $first] } {
	return $data(pages)
    }

    if { ![string length $last] } {
        return [lindex $data(pages) $first]
    } else {
        return [lrange $data(pages) $first $last]
    }
}


# ---------------------------------------------------------------------------
#  Command NoteBook::index
# ---------------------------------------------------------------------------
proc NoteBook::index { path page } {
    variable $path
    upvar 0  $path data

    return [lsearch -exact $data(pages) $page]
}


# ---------------------------------------------------------------------------
#  Command NoteBook::_destroy
# ---------------------------------------------------------------------------
proc NoteBook::_destroy { path } {
    variable $path
    upvar 0  $path data

    foreach page $data(pages) {
        Widget::destroy $path.f$page
    }
    Widget::destroy $path
    unset data
}


# ---------------------------------------------------------------------------
#  Command NoteBook::getframe
# ---------------------------------------------------------------------------
proc NoteBook::getframe { path page } {
    return $path.f$page
}


# ---------------------------------------------------------------------------
#  Command NoteBook::_test_page
# ---------------------------------------------------------------------------
proc NoteBook::_test_page { path page } {
    variable $path
    upvar 0  $path data

    if { [set pos [lsearch -exact $data(pages) $page]] == -1 } {
        return -code error "page \"$page\" does not exists"
    }
    return $pos
}

proc NoteBook::_getoption { path page option } {
    set value [Widget::cget $path.f$page $option]
    if {![string length $value]} {
        set value [Widget::cget $path $option]
    }
    return $value
}

# ---------------------------------------------------------------------------
#  Command NoteBook::_itemconfigure
# ---------------------------------------------------------------------------
proc NoteBook::_itemconfigure { path page lres } {
    variable $path
    upvar 0  $path data

    set res [Widget::configure $path.f$page $lres]
    if { [Widget::hasChanged $path.f$page -text foo] } {
        _compute_width $path
    } elseif  { [Widget::hasChanged $path.f$page -image foo] } {
        _compute_height $path
        _compute_width  $path
    }
    if { [Widget::hasChanged $path.f$page -state state] &&
         $state == "disabled" && $data(select) == $page } {
        set data(select) ""
    }
    return $res
}


# ---------------------------------------------------------------------------
#  Command NoteBook::_compute_width
# ---------------------------------------------------------------------------
proc NoteBook::_compute_width { path } {
    variable $path
    upvar 0  $path data

    set wmax 0
    set wtot 0
    set hmax $data(hpage)
    set font [Widget::cget $path -font]
    if { ![info exists data(textid)] } {
        set data(textid) [$path.c create text 0 -100 -font $font -anchor nw]
    }
    set id $data(textid)
    $path.c itemconfigure $id -font $font
    foreach page $data(pages) {
        $path.c itemconfigure $id -text [Widget::cget $path.f$page -text]
	# Get the bbox for this text to determine its width, then substract
	# 6 from the width to account for canvas bbox oddness w.r.t. widths of
	# simple text.
	foreach {x1 y1 x2 y2} [$path.c bbox $id] break
	set x2 [expr {$x2 - 6}]
        set wtext [expr {$x2 - $x1 + 20}]
        if { [set img [Widget::cget $path.f$page -image]] != "" } {
            set wtext [expr {$wtext + [image width $img] + 4}]
            set himg  [expr {[image height $img] + 6}]
            if { $himg > $hmax } {
                set hmax $himg
            }
        }
        set  wmax  [expr {$wtext > $wmax ? $wtext : $wmax}]
        incr wtot  $wtext
        set  data($page,width) $wtext
    }
    if { [Widget::cget $path -homogeneous] } {
        foreach page $data(pages) {
            set data($page,width) $wmax
        }
        set wtot [expr {$wmax * [llength $data(pages)]}]
    }
    set data(hpage) $hmax
    set data(wpage) $wtot
}


# ---------------------------------------------------------------------------
#  Command NoteBook::_compute_height
# ---------------------------------------------------------------------------
proc NoteBook::_compute_height { path } {
    variable $path
    upvar 0  $path data

    set font    [Widget::cget $path -font]
    set pady0   [Widget::_get_padding $path -tabpady 0]
    set pady1   [Widget::_get_padding $path -tabpady 1]
    set metrics [font metrics $font -linespace]
    set imgh    0
    set lines   1
    foreach page $data(pages) {
        set img  [Widget::cget $path.f$page -image]
        set text [Widget::cget $path.f$page -text]
        set len [llength [split $text \n]]
        if {$len > $lines} { set lines $len}
        if {$img != ""} {
            set h [image height $img]
            if {$h > $imgh} { set imgh $h }
        }
    }
    set height [expr {$metrics * $lines}]
    if {$imgh > $height} { set height $imgh }
    set data(hpage) [expr {$height + $pady0 + $pady1}]
}


# ---------------------------------------------------------------------------
#  Command NoteBook::_get_x_page
# ---------------------------------------------------------------------------
proc NoteBook::_get_x_page { path pos } {
    variable _warrow
    variable $path
    upvar 0  $path data

    set base $data(base)
    # notebook tabs start flush with the left side of the notebook
    set x 0
    if { $pos < $base } {
        foreach page [lrange $data(pages) $pos [expr {$base-1}]] {
            incr x [expr {-$data($page,width)}]
        }
    } elseif { $pos > $base } {
        foreach page [lrange $data(pages) $base [expr {$pos-1}]] {
            incr x $data($page,width)
        }
    }
    return $x
}


# ---------------------------------------------------------------------------
#  Command NoteBook::_xview
# ---------------------------------------------------------------------------
proc NoteBook::_xview { path inc } {
    variable $path
    upvar 0  $path data

    if { $inc == -1 } {
        set base [expr {$data(base)-1}]
        set dx $data([lindex $data(pages) $base],width)
    } else {
        set dx [expr {-$data([lindex $data(pages) $data(base)],width)}]
        set base [expr {$data(base)+1}]
    }

    if { $base >= 0 && $base < [llength $data(pages)] } {
        set data(base) $base
        $path.c move page $dx 0
        _draw_area   $path
        _draw_arrows $path
    }
}


# ---------------------------------------------------------------------------
#  Command NoteBook::_highlight
# ---------------------------------------------------------------------------
proc NoteBook::_highlight { type path page } {
    variable $path
    upvar 0  $path data

    if { [string equal [Widget::cget $path.f$page -state] "disabled"] } {
        return
    }

    switch -- $type {
        on {
            $path.c itemconfigure "$page:poly" \
		    -fill [_getoption $path $page -activebackground]
            $path.c itemconfigure "$page:text" \
		    -fill [_getoption $path $page -activeforeground]
        }
        off {
            $path.c itemconfigure "$page:poly" \
		    -fill [_getoption $path $page -background]
            $path.c itemconfigure "$page:text" \
		    -fill [_getoption $path $page -foreground]
        }
    }
}


# ---------------------------------------------------------------------------
#  Command NoteBook::_select
# ---------------------------------------------------------------------------
proc NoteBook::_select { path page } {
    variable $path
    upvar 0  $path data

    if {![string equal [Widget::cget $path.f$page -state] "normal"]} { return }

    set oldsel $data(select)

    if {[string equal $page $oldsel]} { return }

    if { ![string equal $oldsel ""] } {
	set cmd [Widget::cget $path.f$oldsel -leavecmd]
	if { ![string equal $cmd ""] } {
	    set code [catch {uplevel \#0 $cmd} res]
	    if { $code == 1 || $res == 0 } {
		return -code $code $res
	    }
	}
	set data(select) ""
	_draw_page $path $oldsel 0
    }

    set data(select) $page
    if { ![string equal $page ""] } {
	if { !$data($page,realized) } {
	    set data($page,realized) 1
	    set cmd [Widget::cget $path.f$page -createcmd]
	    if { ![string equal $cmd ""] } {
		uplevel \#0 $cmd
	    }
	}
	set cmd [Widget::cget $path.f$page -raisecmd]
	if { ![string equal $cmd ""] } {
	    uplevel \#0 $cmd
	}
	_draw_page $path $page 0
    }

    _draw_area $path
}


# -----------------------------------------------------------------------------
#  Command NoteBook::_redraw
# -----------------------------------------------------------------------------
proc NoteBook::_redraw { path } {
    variable $path
    upvar 0  $path data

    if { !$data(realized) } { return }

    _compute_height $path

    foreach page $data(pages) {
        _draw_page $path $page 0
    }
    _draw_area   $path
    _draw_arrows $path
}


# ----------------------------------------------------------------------------
#  Command NoteBook::_draw_page
# ----------------------------------------------------------------------------
proc NoteBook::_draw_page { path page create } {
    variable $path
    upvar 0  $path data

    # --- calcul des coordonnees et des couleurs de l'onglet ------------------
    set pos [lsearch -exact $data(pages) $page]
    set bg  [_getoption $path $page -background]

    # lookup the tab colors
    set fgt   $data(lbg)
    set fgb   $data(dbg)

    set h   $data(hpage)
    set xd  [_get_x_page $path $pos]
    set xf  [expr {$xd + $data($page,width)}]

    # Set the initial text offsets -- a few pixels down, centered left-to-right
    set textOffsetY [expr [Widget::_get_padding $path -tabpady 0] + 3]
    set textOffsetX 9

    # Coordinates of the tab corners are:
    #     c3        c4
    #
    # c2                c5
    #
    # c1                c6
    #
    # where
    # c1 = $xd,	  $h
    # c2 = $xd+$xBevel,	           $arcRadius+2
    # c3 = $xd+$xBevel+$arcRadius, $arcRadius
    # c4 = $xf+1-$xBevel,          $arcRadius
    # c5 = $xf+$arcRadius-$xBevel, $arcRadius+2
    # c6 = $xf+$arcRadius,         $h

    set top		2
    set arcRadius	[Widget::cget $path -arcradius]
    set xBevel		[Widget::cget $path -tabbevelsize]

    if { $data(select) != $page } {
	if { $pos == 0 } {
	    # The leftmost page is a special case -- it is drawn with its
	    # tab a little indented.  To achieve this, we incr xd.  We also
	    # decr textOffsetX, so that the text doesn't move left/right.
	    incr xd 2
	    incr textOffsetX -2
	}
    } else {
	# The selected page's text is raised higher than the others