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package MTools::Comp::MAntiRecouvrementItem;
# 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
#
##################################################################
# Les objets heritant de MAntiRecouvrementItem peuvent etre geres par un objet MAntiRecouvrement et ainsi pris en charge
# par un algorithme d'anti-recouvrement.
#
# parametres :
# * $parent : parent de l'objet...
# * %options : table de hash permettant d'initialiser les proprietes
# Les ?v?nements :
# * TRANSLATED : notifie lorsque l'objet est translate...
# attibuts :
# followed_by : MAntiRecouvrementItem permet aux objets contenus dans ce tableau de suivre ses deplacements
# (permet un chainage des objets)
# Les propietes :
# * xmin, ymin, xmax, ymax : definissent les caract?risiques de l'espace dans lequel l'objet est contraint.
# * height, width : definissent la base rectangulaire de l'objet
# * auto_sizing : si width ou height ne sont pas pass?s en param?tre, les caracteristiques
# sont auto-determinees en fonction de la bbox de l'objet. On peut bien evidemment choisir cette definition automatique, cependant
# attention, la bbox de l'objet ne correspond par toujours a la bbox visible de l'objet.
# * x, y : determinent la position de l'objet et sont mis a jour automatiquement au cours des deplacement de l'objet.
# * anchors : permet d'active ou ne le suivi des objets contenus dans 'followed_by'
# Les fonctions :
# * update_bbox : permet de demander une remise ? jour du calcul automatique des dimensions de l'objet (util uniquement si auto_sizing == 1)
use MTools;
use vars qw /@ISA/;
use MTools::GUI::MGroup;
require Exporter;
BEGIN
{
@ISA = qw /MTools::GUI::MGroup Exporter/;
@EXPORT = qw / translate scale rotate /;
}
use strict;
use Tk;
sub new {
my ($class, $parent, %options) = @_;
my $self = new MTools::GUI::MGroup ($parent);
bless $self, $class;
$self -> recordEvent ('TRANSLATED');
$self -> recordProperty ('auto_sizing', (!defined $options{width}) || (!defined $options{height}));
$self -> recordProperty ('height', 0);
$self -> recordProperty ('width', 0);
$self -> recordProperty ('x', 0);
$self -> recordProperty ('y', 0);
$self -> recordProperty ('xmin', 0);
$self -> recordProperty ('ymin', 0);
$self -> recordProperty ('xmax', 1500);
$self -> recordProperty ('ymax', 1500);
$self -> recordProperty ('anchors', 1);
$self -> recordEvent ('__HANDLE_MOVING');
$self -> recordEvent ('__PUSH_BACK');
$self -> recordEvent ('__ENQUEUE_MOVING');
$self -> mconfigure (%options);
return $self;
}
sub translate {
my ($self, $delta_x, $delta_y) = @_;
if ($self -> {__added})
{
if ((abs ($delta_x) >= __max_of(2, $self -> mget ('width') / 2)) or (abs ($delta_y) >= __max_of(2, $self -> mget ('height') / 2)))
{
my ($mini_dx, $mini_dy) = (int ($delta_x / 2), int ($delta_y / 2));
$self -> translate ($mini_dx, $mini_dy);
$self -> translate ($delta_x - $mini_dx, $delta_y - $mini_dy);
}
else
{
$self -> __try_move ($delta_x, $delta_y, []);
$self -> notify ('__HANDLE_MOVING');
}
}
else
{
$self -> __update_xy ($delta_x, $delta_y);
}
}
sub __search {
my ($val, @tab) = @_;
my $result = 0;
if (($#tab != -1) and (defined $val))
{
foreach (@tab)
{
if (($_ eq $val) or ($_ =~ m/$val/))
{
$result = 1;
last;
}
}
}
return $result;
}
sub __try_move {
my ($self, $delta_x, $delta_y, $path) = @_;
return if __search ($self, @{$path});
push (@{$path}, $self);
$self -> __update_xy ($delta_x, $delta_y);
my $label_coords_x = $self -> mget ('x');
my $label_coords_y = $self -> mget ('y');
my $x_min = $self -> mget ('xmin');
my $x_max = $self -> mget ('xmax');
my $y_min = $self -> mget ('ymin');
my $y_max = $self -> mget ('ymax');
my ($push_x, $push_y) = (0, 0);
$push_x = $x_min - $label_coords_x if $label_coords_x < $x_min;
$push_x = $x_max - $label_coords_x if $label_coords_x > $x_max;
$push_y = $y_min - $label_coords_y if $label_coords_y < $y_min;
$push_y = $y_max - $label_coords_y if $label_coords_y > $y_max;
$self -> notify ('__PUSH_BACK', $self, $push_x, $push_y, $path) if (($push_x != 0) or ($push_y != 0));
if ($self -> mget ('anchors'))
{
if (defined $self -> {followed_by})
{
foreach (@{$self -> {followed_by}})
{
$_ -> __try_move($delta_x + $push_x, $delta_y + $push_y, $path);
}
}
}
my @other_path = @{$path};
$self -> notify ('__ENQUEUE_MOVING', $self, $delta_x + $push_x, $delta_y + $push_y, [@other_path]);
pop @{$path};
}
sub __update_xy {
my ($self, $delta_x, $delta_y) = @_;
MTools::translate ($self, $delta_x, $delta_y);
$self -> mconfigure ('x' => $self -> mget ('x') + $delta_x);
$self -> mconfigure ('y' => $self -> mget ('y') + $delta_y);
$self -> notify ('TRANSLATED', $delta_x, $delta_y);
}
sub __max_of {
my (@values) = @_;
my $res = $values [0];
foreach (@values)
{
$res = $_ if ($_ >= $res);
}
return $res;
}
sub scale {
my ($self, @params) = @_;
MTools::scale ($self, @params);
$self -> update_bbox ();
$self -> translate (0, 0);
}
sub rotate {
my ($self, @params) = @_;
MTools::rotate ($self, @params);
$self -> update_bbox ();
$self -> translate (0, 0);
}
sub update_bbox {
my ($self) = @_;
if ($self -> mget ('auto_sizing'))
{
my @rect = $self -> bbox ();
$self -> mconfigure (width => $rect [2] - $rect [0]);
$self -> mconfigure (height => $rect [3] - $rect [1]);
}
}
1;
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