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Man Pages


Manual Reference Pages  -  GRAPHICS::PRIMITIVE::CANVAS (3)

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NAME

Graphics::Primitive::Canvas - Component composed of paths

CONTENTS

DESCRIPTION

Graphics::Primitive::Canvas is a component for drawing arbitrary things. It holds Paths and Operations.

SYNOPSIS



  use Graphics::Primitive::Canvas;

  my $canvas = Graphics::Primitive::Canvas->new;
  $canvas->move_to($point); # or just $x, $y
  $canvas->do($op);



DESCRIPTION

The Canvas is a container for multiple Paths. It has a path that is the operative path for all path-related methods. You can treat the Canvas as if it was a path, calling methods like line_to or move_to.

When you are ready to perform an operation on the path, call the do method with the operation you want to call as an argument. Drawing a line and stroking it would look like:



  $canvas->move_to(0, 0);
  $canvas->line_to(10, 10);
  my $op = Graphics::Primitive::Operation::Stroke->new;
  $stroke->brush->color(
      Graphics::Color::RGB->new(red => 0, blue => 1, green => 1)
  );
  $canvas->do($op);



When you instantiate a Canvas a newly instantiated path resides in path. After you call do that current path is moved to the paths list and new path is placed in current_path. If you want to keep the path around you can call save before do then call restore to put a saved copy of the path back into path.

METHODS

    Constructor

new Creates a new Graphics::Primitive::Canvas

    Instance Methods

do Given an operation, pushes the current path onto the path stack.



  FIXME: Example



path The current path this canvas is using.
path_count Count of paths in paths.
paths Arrayref of hashrefs representing paths combined with their operations:



  [
    {
        path => $path,
        op   => $op
    },
  ]



restore Replace the current path by popping the top path from the saved path list.
save Copy the current path and push it onto the stack of saved paths.
saved_paths List of saved paths. Add to the list with save and pop from it using restore.
saved_path_count Count of paths saved in saved_paths.

AUTHOR

Cory Watson <gphat@cpan.org>

COPYRIGHT & LICENSE

Copyright 2008-2010 by Cory G Watson.

You can redistribute and/or modify this code under the same terms as Perl itself.

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perl v5.20.3 GRAPHICS::PRIMITIVE::CANVAS (3) 2015-01-04

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