graphics::primitive::componentlist(3pm) [debian man page]

Graphics::Primitive::ComponentList(3pm) 		User Contributed Perl Documentation		   Graphics::Primitive::ComponentList(3pm)

NAME

       Graphics::Primitive::ComponentList - List of Components

DESCRIPTION

       Maintains a list of components and their constraints.  This is implemented as a class to provide functionality above and beyond a simple
       array.

SYNOPSIS

	 my $c = Graphics::Primitive::ComponentList->new;
	 $c->add_component($comp, $constraint);

	 my $cindex = $c->find_component($comp->name);

METHODS

   Constructor
       new Creates a new Container.

   Instance Methods
       add_component ($component, $constraint)
	   Add a component to the list.  Returns a true value if the component was added successfully. A second argument may be required, please
	   consult the POD for your specific layout manager implementation.

	   Before the component is added, it is passed to the validate_component method.  If validate_component does not return a true value, then
	   the component is not added.

       clear
	   Reset components and constraints to empty arrayrefs.

       component_count
	   Returns the number of components in this list.

       constraint_count
	   Returns the number of constraints in this list.

       each
	   Calls the supplied CODEREF for each component in this list, passing the component and it's constraints as arguments.

	     my $flist = $list->each(
	       sub{
		   my ($component, $constraint) = @_; $comp->class('foo)
	       }
	     );

       find
	   Returns a new ComponentList containing only the components for which the supplied CODEREF returns true.  The coderef is called for each
	   component and is passed the component and it's constraints.	Undefined components (the ones left around after a remove_component) are
	   automatically skipped.

	     my $flist = $list->find(
	       sub{
		 my ($component, $constraint) = @_; return $comp->class eq 'foo'
	       }
	     );

	   If no matching components are found then a new list is returned so that simple calls liked $container->find(...)->each(...) don't
	   explode.

       find_component
	   Returns the index of the first component with the supplied name.  Returns undef if no component with that name is found.

       get_component
	   Get the component at the specified index.

       get_constraint
	   Get the constraint at the specified index.

       remove_component
	   Removes a component and it's constraint.  Components must have names to be removed.	Returns an arrayref of Components that were
	   removed.

AUTHOR

       Copyright 2008-2009 by Cory G Watson.

BUGS

       Please report any bugs or feature requests to "bug-geometry-primitive at rt.cpan.org", or through the web interface at
       http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Geometry-Primitive <http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Geometry-Primitive>.  I
       will be notified, and then you'll automatically be notified of progress on your bug as I make changes.

COPYRIGHT &; LICENSE
       Copyright 2008-2009 by Cory G Watson.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.12.3							    2010-08-21				   Graphics::Primitive::ComponentList(3pm)

Check Out this Related Man Page

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.

perl v5.12.3							    2010-08-21					  Graphics::Primitive::Canvas(3pm)

Linux and UNIX Man Pages

graphics::primitive::componentlist(3pm) [debian man page]

Check Out this Related Man Page