package MTools::GUI::MTexture;
#	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
#
##################################################################

# Permet d'appliquer un texture a un objet
# Parametres : 
# 	* parent : pere de l'objet.
#	* target : group zinc ou MTools destine a contenir les images de texture
# 	* pattern : nom d'un fichier image ou objet MTools.

use strict;

use MTools;
use MTools::GUI::MGroup;
use MTools::GUI::MImage;
use MTools::GUI::MClip;

use vars qw / @ISA /;


BEGIN 
{
	@ISA = qw /MTools::GUI::MGroup/;
}

sub new {
	my ($class, $parent, $target, $pattern) = @_;
	my $self = new MTools::GUI::MGroup ($parent);
	bless $self, $class;
	
	chggroup ($target, $self);
	
	my ($img_w, $img_h, $offset_x, $offset_y);

	if (ref($pattern) eq '') {
	    my $image = new MTools::GUI::MImage ($self, $pattern);
	    my @bb = bbox ($image);
	    $img_w = $bb [2] - $bb [0];
	    $img_h = $bb [3] - $bb [1];
	    mdelete ($image);
	} else {
	    my @bb = bbox ($pattern);
	    $img_w = $bb [2] - $bb [0];
	    $img_h = $bb [3] - $bb [1];
	    $offset_x = -$bb [0];
	    $offset_y = -$bb [1];
	}
	
	
	my @bb = bbox ($target);
	my $w = $bb [2] - $bb [0];
	my $h = $bb [3] - $bb [1];
	$offset_x += $bb [0];
	$offset_y += $bb [1];
	
	my @images_list;
	my $image;
	for (my $x = 0; $x < $w; $x += $img_w)
	{
		for (my $y = 0; $y < $h; $y += $img_h)
		{
			if (ref($pattern) eq '') {
			    $image = new MTools::GUI::MImage ($self, $pattern);
			} else {
			    $image = clone($pattern);
			    chggroup($image, $self);
			}
			translate ($image, $x + $offset_x, $y + $offset_y);
			push @images_list, $image;
		}
	}
	
	my $clip = clone ($target);
	mconfigure ($clip, -visible => 0);
	if (type ($clip) eq 'group') {
	    my $texture = new MTools::GUI::MGroup($self);
	    foreach (@images_list) {
		chggroup($_, $texture);
	    }
	    foreach ($zinc->find('withtag', ".$clip*")) {
		if (type ($_) ne 'group') {
		    mconfigure ($_, -visible => 0);
    		    new MTools::GUI::MClip (clone($texture), $_);
		}
	    }
	    mdelete($texture);
	} else {
	    new MTools::GUI::MClip ($self, $clip);
	}
	return $self;
}



1;