Chart::Plot::Canvas 0.02

Chart::Plot::Canvas is a Perl module to plot two dimensional data in an Tk Canvas.

SYNOPSIS

use Chart::Plot::Canvas;

my $img = Chart::Plot::Canvas->new();
my $anotherImg = Chart::Plot::Canvas->new ($image_width, $image_height);

$img->setData (@dataset) or die( $img->error() );
$img->setData (@xdataset, @ydataset);
$img->setData (@anotherdataset, red_dashedline_points);
$img->setData (@xanotherdataset, @yanotherdataset,
Blue SolidLine NoPoints);

my ($xmin, $ymin, $xmax, $ymax) = $img->getBounds();

$img->setGraphOptions (horGraphOffset => 75,
vertGraphOffset => 100,
title => My Graph Title,
horAxisLabel => my X label,
vertAxisLabel => my Y label );

print $img->draw();

$img->canvas($toplevel)->pack();

This package overloads Chart::Plot and supplies a new method canvas that returns a Tk Canvas equivalent to GD::Image returned by the method draw of Chart::Plot.

The graphs are descripted by same way as for Chart::Plot.

With Chart::Plot::Canvas, the method draw works like with Chart::Plot.

USAGE

See Chart::Plot for all over methods.

Create the canvas: canvas()

$img->canvas(toplevel);

This method creates the canvas and returns it.

use Chart::Plot::Canvas;

my $img = Chart::Plot->new();
$img->setData (@xdataset, @ydataset);
my $cv = $img->canvas($toplevel);
$cv->pack();