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package MTools::Transform::MRotation;
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU LGPL Libray 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 Library General Public License for more details.
#
# You should have received a copy of the GNU Library General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA,
# or refer to http://www.gnu.org/copyleft/lgpl.html
#
##################################################################
use strict;
use MTools;
use MTools::MObjet;
use vars qw /@ISA/;
BEGIN
{
@ISA = qw /MTools::MObjet/;
}
use Tk;
sub new {
my ($class, $target, $angle, $x, $y) = @_;
my $self = new MTools::MObjet ();
bless $self, $class;
if (!defined $x) {$x = 0;}
if (!defined $y) {$y = 0;}
if (!defined $angle) {$angle = 0;}
$self -> {__current_angle} = 0;
$self -> recordProperty ('-visible', 0);
$self -> recordProperty ('target', $target);
$self -> recordProperty ('angle', $angle);
$self -> recordProperty ('x', $x);
$self -> recordProperty ('y', $y);
$self -> plisten ('-visible', sub {
my ($src, $key, $val) = @_;
if ($val == 0)
{
$self -> __rotate (0);
}
else
{
$self -> __rotate ($self -> mget ('angle'));
}
});
$self -> plisten ('angle', sub {
my ($src, $key, $val) = @_;
$self -> __rotate ($val);
});
$self -> __rotate ($angle);
return $self;
}
sub __rotate {
my ($self, $angle) = @_;
my $new_angle = $angle - $self -> {__current_angle};
$self -> {__current_angle} = $angle;
my $target = $self -> mget ('target');
my $x = $self -> mget ('x');
my $y = $self -> mget ('y');
$target -> rotate ($new_angle, 1, $x, $y);
}
1;
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