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| Graphics::Primitive::ComponentList(3) | User Contributed Perl Documentation | Graphics::Primitive::ComponentList(3) |
NAME
Graphics::Primitive::ComponentList - List of ComponentsDESCRIPTION
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>. 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.
| 2015-01-04 | perl v5.32.1 |
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