table of contents
Graphics::Primitive::Canvas(3pm) | User Contributed Perl Documentation | Graphics::Primitive::Canvas(3pm) |
NAME¶
Graphics::Primitive::Canvas - Component composed of paths
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.
2022-06-14 | perl v5.34.0 |