NAME

Config::Model::WizardHelper - Helps to create wizard widget for config models

SYNOPSIS

 use Config::Model ;

 my $inst   = $model -> instance ( root_class_name => 'Master', 
                                   instance_name => 'test1');

 my $root   = $inst -> config_root ;

 my $wizard = $inst -> wizard_helper ( leaf_cb => sub { ... },
                                       hash_element_cb => sub { ... } );
 $wizard->start ;

DESCRIPTION

This module provides a class that is able to scan a configuration tree and will call back user defined subroutines on one of the following condition:

• A configuration item contains an error (mostly undefined mandatory values)
• A configuration item has a important level. See level parameter for details.

By default, the wizard will only scan element with an intermediate experience.

The wizard helper supports going forward and backward during the scan (to support back and next buttons on a wizard widget).

CONSTRUCTOR

The constructor should be used only by Config::Model::Instance with the wizard_helper method.

Creating a wizard helper

A wizard helper will need at least two kind of call-back that must be provided by the user: a call-back for leaf elements and a call-back for hash elements (which will be also used for list elements).

These call-back must be passed when creating the wizard object (the parameters are named leaf_cb and hash_element_cb)

Here are the the parameters accepted by wizard_helper:

call_back_on_important

Whether to call back when an important element is found (default 1).

experience

Specifies the experience of the element scanned by the wizard (default 'intermediate').

leaf_cb

Subroutine called backed for leaf elements. See "Callback prototypes" in Config::Model::ObjTreeScanner for signature and details. (mandatory)

hash_element_cb

Subroutine called backed for hash elements. See "Callback prototypes" in Config::Model::ObjTreeScanner for signature and details. (mandatory)

Custom callbacks

By default, leaf_cb will be called for all types of leaf elements (i.e enum. integer, strings, ...). But you can provide dedicated call-back for each type of leaf:

 enum_value_cb, integer_value_cb, number_value_cb, boolean_value_cb,
 uniline_value_cb, string_value_cb

Likewise, you can also provide a call-back dedicated to list elements with list_element_cb

Methods

start

Start the scan and perform call-back when needed. This function will return when the scan is completely done.

go_forward

Set wizard in forward (default) mode.

go_backward

Set wizard in backward mode.

AUTHOR

Dominique Dumont, (ddumont at cpan dot org)

SEE ALSO

Config::Model, Config::Model::Instance, Config::Model::Node, Config::Model::HashId, Config::Model::ListId, Config::Model::Value, Config::Model::CheckList, Config::Model::ObjTreeScanner,