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# Copyright (C) 2005-2007 Tresys Technology, LLC
# 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
namespace eval Apol_Level_Dialog {
variable dialog ""
variable vars
}
# Create a dialog box to allow the user to select a single MLS level.
# Return an instance of an apol_mls_level. If no level is selected
# then return an empty list; otherwise return the level. The caller
# must delete it afterwards.
proc Apol_Level_Dialog::getLevel {{defaultLevel {}} {parent .}} {
variable dialog
if {![winfo exists $dialog]} {
_create_dialog $parent
}
set f [$dialog getframe]
Apol_Widget::resetLevelSelectorToPolicy $f.level
if {$defaultLevel != {}} {
Apol_Widget::setLevelSelectorLevel $f.level $defaultLevel
}
# force a recomputation of button sizes (bug in ButtonBox)
$dialog.bbox _redraw
set retval [$dialog draw]
if {$retval == -1 || $retval == 1} {
return {}
}
_get_level $dialog
}
########## private functions below ##########
proc Apol_Level_Dialog::_create_dialog {parent} {
variable dialog
variable vars
set dialog [Dialog .level_dialog -modal local -parent $parent \
-separator 1 -homogeneous 1 -title "Select Level"]
array unset vars $dialog:*
set f [$dialog getframe]
set label [label $f.ll -text "Level:"]
set level [Apol_Widget::makeLevelSelector $f.level 12]
pack $label -anchor w
pack $level -expand 1 -fill both
$dialog add -text "OK" -command [list Apol_Level_Dialog::_okay $dialog]
$dialog add -text "Cancel"
}
proc Apol_Level_Dialog::_get_level {dialog} {
return [Apol_Widget::getLevelSelectorLevel [$dialog getframe].level]
}
# Check that the level is legal by validating it against the current
# policy.
proc Apol_Level_Dialog::_okay {dialog} {
set level [_get_level $dialog]
if {![ApolTop::is_policy_open] || [$level validate $::ApolTop::policy] != 1} {
tk_messageBox -icon error -type ok -title "Invalid Level" \
-message "The selected level is not valid for the current policy."
} else {
$dialog enddialog 0
}
$level -acquire
$level -delete
}
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