#==========================================================================
#			   Copyright (c) 1995-1998 Martien Verbruggen
#--------------------------------------------------------------------------
#
#	Name:
#		GD::Graph::points.pm
#
# $Id: points.pm,v 1.10 2000/10/07 04:06:22 mgjv Exp $
#
#==========================================================================

package GD::Graph::points;

$GD::Graph::points::VERSION = '$Revision: 1.10 $' =~ /\s([\d.]+)/;

use strict;
 
use GD::Graph::axestype;
use GD::Graph::utils qw(:all);

@GD::Graph::points::ISA = qw( GD::Graph::axestype );

# PRIVATE
sub draw_data_set
{
	my $self = shift;
	my $ds = shift;

	my @values = $self->{_data}->y_values($ds) or
		return $self->_set_error("Impossible illegal data set: $ds",
			$self->{_data}->error);

	# Pick a colour
	my $dsci = $self->set_clr($self->pick_data_clr($ds));
	my $type = $self->pick_marker($ds);

	for (my $i = 0; $i < @values; $i++)
	{
		next unless defined $values[$i];
		my ($xp, $yp);
		if (defined($self->{x_min_value}) && defined($self->{x_max_value}))
		{
			($xp, $yp) = $self->val_to_pixel(
				$self->{_data}->get_x($i), $values[$i], $ds);
		}
		else	
		{
			($xp, $yp) = $self->val_to_pixel($i+1, $values[$i], $ds);
		}
		$self->marker($xp, $yp, $type, $dsci );
		$self->{_hotspots}->[$ds]->[$i] = 
			['rect', $self->marker_coordinates($xp, $yp)];
	}

	return $ds;
}

# Pick a marker type

sub pick_marker # number
{
	my $self = shift;
	my $num = shift;

	ref $self->{markers} ?
		$self->{markers}[ $num % (1 + $#{$self->{markers}}) - 1 ] :
		($num % 8) || 8;
}

# Draw a marker

sub marker_coordinates
{
	my $self = shift;
	my ($xp, $yp) = @_;
	return (
		$xp - $self->{marker_size},
		$xp + $self->{marker_size},
		$yp + $self->{marker_size},
		$yp - $self->{marker_size},
	);
}

sub marker # $xp, $yp, type (1-7), $colourindex
{
	my $self = shift;
	my ($xp, $yp, $mtype, $mclr) = @_;
	return unless defined $mclr;

	my ($l, $r, $b, $t) = $self->marker_coordinates($xp, $yp);

	MARKER: {

		($mtype == 1) && do 
		{ # Square, filled
			$self->{graph}->filledRectangle( $l, $t, $r, $b, $mclr );
			last MARKER;
		};
		($mtype == 2) && do 
		{ # Square, open
			$self->{graph}->rectangle( $l, $t, $r, $b, $mclr );
			last MARKER;
		};
		($mtype == 3) && do 
		{ # Cross, horizontal
			$self->{graph}->line( $l, $yp, $r, $yp, $mclr );
			$self->{graph}->line( $xp, $t, $xp, $b, $mclr );
			last MARKER;
		};
		($mtype == 4) && do 
		{ # Cross, diagonal
			$self->{graph}->line( $l, $b, $r, $t, $mclr );
			$self->{graph}->line( $l, $t, $r, $b, $mclr );
			last MARKER;
		};
		($mtype == 5) && do 
		{ # Diamond, filled
			$self->{graph}->line( $l, $yp, $xp, $t, $mclr );
			$self->{graph}->line( $xp, $t, $r, $yp, $mclr );
			$self->{graph}->line( $r, $yp, $xp, $b, $mclr );
			$self->{graph}->line( $xp, $b, $l, $yp, $mclr );
			$self->{graph}->fillToBorder( $xp, $yp, $mclr, $mclr );
			last MARKER;
		};
		($mtype == 6) && do 
		{ # Diamond, open
			$self->{graph}->line( $l, $yp, $xp, $t, $mclr );
			$self->{graph}->line( $xp, $t, $r, $yp, $mclr );
			$self->{graph}->line( $r, $yp, $xp, $b, $mclr );
			$self->{graph}->line( $xp, $b, $l, $yp, $mclr );
			last MARKER;
		};
		($mtype == 7) && do 
		{ # Circle, filled
			$self->{graph}->arc( $xp, $yp, 2 * $self->{marker_size},
						 2 * $self->{marker_size}, 0, 360, $mclr );
			$self->{graph}->fillToBorder( $xp, $yp, $mclr, $mclr );
			last MARKER;
		};
		($mtype == 8) && do 
		{ # Circle, open
			$self->{graph}->arc( $xp, $yp, 2 * $self->{marker_size},
						 2 * $self->{marker_size}, 0, 360, $mclr );
			last MARKER;
		};
	}
}


sub draw_legend_marker
{
	my $self = shift;
	my $n = shift;
	my $x = shift;
	my $y = shift;

	my $ci = $self->set_clr($self->pick_data_clr($n));

	my $old_ms = $self->{marker_size};
	my $ms = _min($self->{legend_marker_height}, $self->{legend_marker_width});

	($self->{marker_size} > $ms/2) and $self->{marker_size} = $ms/2;
	
	$x += int($self->{legend_marker_width}/2);
	$y += int($self->{lg_el_height}/2);

	$n = $self->pick_marker($n);

	$self->marker($x, $y, $n, $ci);

	$self->{marker_size} = $old_ms;
}

"Just another true value";