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package MTools::Comp::MTremor;
# 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
#
##################################################################
# Le composant permet d'ajouter un comportement de tremblement ? un objet cible
#
# Parametres :
# * target : objet cible du tremblement
# * %options : table de hash permettant la configuration initiale des proprietes
# Propriete :
# * timeout : periode / 2 du tremblement
# * target : cible
# * amplitude_x, amplitude_y : amplitude du deplacement
# * -visible : visibilite versus activation du comportement
use strict;
use MTools;
#use MTools::MSwitch;
use MTools::MTimer;
use vars qw /@ISA/;
BEGIN
{
@ISA = qw /MTools::MObjet/;
}
use Tk;
sub new {
my ($class, $target, %options) = @_;
$self -> {__timer} = my $timer = new MTools::MTimer (200, 1, \&tremble);
my $self = new MTools::MObjet ();
# $self -> {__sw} = new MTools::MSwitch (
# $parent,
# tremble => [$timer],
# fixe => [],
# );
# $self -> {__sw} -> mconfigure (state => 'fixe');
$timer -> mconfigure ( callback => [$self, '__tremble']);
bless $self, $class;
$self -> recordProperty ('timeout', 200);
$self -> recordProperty ('target', $target);
$self -> recordProperty ('amplitude_x', 2);
$self -> recordProperty ('amplitude_y', 2);
$self -> recordProperty ('-visible', 0);
$self -> plisten ('-visible', sub {
my ($src, $key, $val) = @_;
if ($val == 0)
{
$self -> __stop ();
}
else
{
$self -> __start ();
}
});
$self -> mconfigure (%options);
plink ([$self, 'timeout'], [$timer, 'timeout']);
$self -> {__timer} = $timer;
$self -> {__x} = 0;
$self -> {__y} = 0;
$self -> {__started} = 0;
return $self;
}
sub __tremble {
my ($self) = @_;
my $target = $self -> mget ('target');
my $dx = -2 * $self -> {__x};
my $dy = -2 * $self -> {__y};
$self -> {__x} = -$self -> {__x};
$self -> {__y} = -$self -> {__y};
$target -> translate ($dx, $dy);
}
sub __start {
my ($self) = @_;
if ($self -> {__started}) {return;}
$self -> {__started} = 1;
my $target = $self -> mget ('target');
my $amplitudex = $self -> mget ('amplitude_x');
my $amplitudey = $self -> mget ('amplitude_y');
$self -> {__x} = $amplitudex;
$self -> {__y} = $amplitudey;
$target -> translate ($amplitudex, $amplitudey);
# $self -> {__sw} -> mconfigure ('state' => 'tremble');
$self -> {__timer} -> start ();
}
sub __stop {
my ($self) = @_;
if (!$self -> {__started}) {return;}
$self -> {__started} = 0;
my $target = $self -> mget ('target');
$target -> translate (-$self -> {__x}, -$self -> {__y});
$self -> {__x} = 0;
$self -> {__y} = 0;
$self -> {__sw} -> mconfigure ('state' => 'fixe');
$self -> {__timer} -> stop ();
}
1;
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