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### Copyright (C) 1995-1997 Jesper K. Pedersen
### This program is free software; you can redistribute it and/or modify
### it under the terms of the GNU General Public License as published by
### the Free Software Foundation; either version 2 of the License, or
### (at your option) any later version.
###
### This program is distributed in the hope that it will be useful,
### but WITHOUT ANY WARRANTY; without even the implied warranty of
### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
### GNU General Public License for more details.
###
### You should have received a copy of the GNU General Public License
### along with this program; if not, write to the Free Software
### Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
######################################################################
######################################################################
### Thanks to Jeppe Buk (buk@imada.sdu.dk) for creating this
### widget.
######################################################################
######################################################################
######################################################################
### This function creates a popup menu (just like menu) with the
### difference, that a "more" entry will be place at the buttom if
### more entries are use than can be located on the screen at once.
######################################################################
proc ext_optionMenu {w varName maxHeight firstValue args} {
global __language
upvar #0 $varName var
if ![info exists var] {
set var $firstValue
}
menubutton $w -textvariable $varName -indicatoron 1 -menu $w.menu0 \
-relief raised -bd 2 -highlightthickness 2 -anchor c
# The (sub) menus
set noMenus [expr ([llength $args]+1) / $maxHeight + 1]
for {set j 0} {$j < $noMenus} {incr j} {
menu $w.[buildMenuName $j] -tearoff 0
}
$w.menu0 add command -label $firstValue \
-command [list set $varName $firstValue]
set curNo 1
foreach i $args {
set prevMenu [expr $curNo / $maxHeight - 1]
set curMenu [expr $curNo / $maxHeight]
if {$curNo % $maxHeight == 0} {
$w.[buildMenuName $prevMenu] add separator
$w.[buildMenuName $prevMenu] add cascade -label $__language(extOptMenu,1) \
-menu $w.[buildMenuName $curMenu]
}
$w.[buildMenuName $curMenu] add command -label $i \
-command [list set $varName $i]
incr curNo
}
return $w.menu
}
proc buildMenuName { no } {
set name menu0
for {set i 1} {$i <= $no} {incr i} {
append name ".menu$i"
}
return $name
}
######################################################################
### This function calculates the number of items, which can be located
### at the screen in a menu
######################################################################
proc numOfItems {} {
set w .__dotfile
toplevel $w
wm withdraw $w
menubutton $w.a -menu $w.a.b
menu $w.a.b
$w.a.b add command -label "test"
pack $w.a
update
set h1 [winfo reqheight $w.a.b]
$w.a.b add command -label "test"
update
set h2 [winfo reqheight $w.a.b]
set total [winfo screenheight .]
set elmHeight [expr $h2-$h1]
destroy $w
return [expr ($total - ($h1-$elmHeight))/$elmHeight -1]
}
proc extOptMenu {w varName firstValue args} {
ext_optionMenu $w $varName [numOfItems] $firstValue $args
}
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