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package SVG::Graph::Glyph::tree;
use base SVG::Graph::Glyph;
use Data::Dumper;
use strict;
=head2 draw
Title : draw
Usage :
Function:
Example :
Returns :
Args :
=cut
sub draw{
my ($self,@args) = @_;
my $id = 'n'.sprintf("%07d",int(rand(9999999)));
# my $frame_transform = $self->frame_transform;
my $group = $self->svg->group(id=>"tree$id");
my($data) = $self->group->data;
my $root = $data->root;
my $xsize = $self->xsize;
my $ysize = $self->ysize;
my $yscale = $ysize / $root->depth;
my $xscale = $xsize / (scalar($root->leaves_under));
my $xoffset = $self->xoffset;
my $yoffset = $self->yoffset;
$group->line(x1=>$xoffset+($xsize/2),x2=>$xoffset+($xsize/2),y1=>$yoffset,y2=>$yoffset+($yscale*$root->branch_length),style=>{$self->_style});
my $maxy = $self->getmaxy(node=>$root, yscale=>$yscale, yoffset=>$yoffset+($yscale*$root->branch_length));
#root branch
$self->_draw(group=>$group,node=>$root,
xsize=>$xsize,
yscale=>$yscale,
xoffset=>$xoffset,yoffset=>$yoffset+($yscale*$root->branch_length),
maxy=>$maxy
);
}
sub getmaxy {
my($self,%a) = @_;
my $maxy = $a{yoffset};
foreach my $d ($a{node}->daughters){
my $temp = $self->getmaxy(node=>$d, yscale=>$a{yscale}, yoffset => $a{yoffset} + ($d->branch_length * $a{yscale}));
if ($temp > $maxy) {
$maxy = $temp;
}
}
return $maxy;
}
=head2 _draw
Title : _draw
Usage :
Function:
Example :
Returns :
Args :
=cut
sub _draw {
my($self,%a) = @_;
my $xoffset = $a{xoffset};
my $xoffset_old;
my $maxy = $a{maxy};
my $c = 1;
foreach my $d ($a{node}->daughters){
my %style = $a{node}->_style ? $a{node}->_style : $self->_style;
my $frac = $d->leaves_under / $a{node}->leaves_under;
$xoffset_old = $xoffset;
#horizontal bar spanning the domain of a child subtree
if(!$d->left_sisters and !$d->right_sisters){
} elsif(!$d->left_sisters){
$a{group}->line(x1=>$xoffset+($frac*$a{xsize}/2),
y1=>$a{yoffset},
x2=>$xoffset+($frac*$a{xsize}),
y2=>$a{yoffset},
style=>{%style});
#warn join ' ', $a{node}->_style;
} elsif(!$d->right_sisters){
$a{group}->line(x1=>$xoffset,
y1=>$a{yoffset},
x2=>$xoffset+($frac*$a{xsize}/2),
y2=>$a{yoffset},
style=>{%style});
} else {
$a{group}->line(x1=>$xoffset,
y1=>$a{yoffset},
x2=>$xoffset+($frac*$a{xsize}),
y2=>$a{yoffset},
style=>{%style});
}
if($d->depth_under <= 1) {
$a{group}->line(x1=>(($frac*$a{xsize}+$xoffset)+($xoffset))/2,x2=>(($frac*$a{xsize}+$xoffset)+($xoffset))/2,
y1=>$a{yoffset},
y2=>$maxy,
style=>{%style}
);
}
else {
#root branch of the child subtree
$a{group}->line(x1=>(($frac*$a{xsize}+$xoffset)+($xoffset))/2,x2=>(($frac*$a{xsize}+$xoffset)+($xoffset))/2,
y1=>$a{yoffset},
y2=>$a{yoffset}+($a{yscale}*$d->branch_length),
style=>{%style}
);
}
#root branch label
my($cx,$cy) = ((($frac*$a{xsize}+$xoffset)+($xoffset))/2 , $maxy);
#my($cx,$cy) = ((($frac*$a{xsize}+$xoffset)+($xoffset))/2 , $a{yoffset}+($a{yscale}*$d->branch_length));
$a{group}->text(x=>$cx,
y=>$cy,
# style=>{'font-size'=>'15px'},
style=>{$self->_style,'stroke-width'=>0.5},
transform=>"rotate(90,$cx,$cy)"
)->cdata($d->branch_label());
#->cdata($d->name);
$xoffset += $frac*$a{xsize};
$c++;
$self->_draw(group=>$a{group},node=>$d,
xsize=>$xoffset - $xoffset_old,
yscale=>$a{yscale},
xoffset => $xoffset_old,
yoffset => $a{yoffset} + ($d->branch_length * $a{yscale}),
maxy => $maxy
);
}
}
1;
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