HTML::FormHandler::Field::Checkbox - a checkbox field type
This field is very similar to the Boolean Widget except that this field allows other positive values besides 1. Since unselected checkboxes do not return a parameter, fields with Checkbox type will always be set to the 'input_without_param' default if they do not appear in the form.
In order to create the HTML for a checkbox, there must be a 'value="xx"'. This value is specified with the 'checkbox_value' attribute, which defaults to 1.
If the checkbox is not checked, it will be set to the value of this attribute (the unchecked value). Default = 0. Because unchecked checkboxes do not return anything in the HTTP parameters, the absence of a checkbox key in the parameters hash forces this field to this value. This means that Checkbox fields, unlike other fields, will not be ignored if there is no input. If a particular checkbox should not be processed for a particular form, you must set 'inactive' to 1 instead.
Note that a checkbox is only 'checked' when the 'checkbox_value' is provided. The 'value' for a non-checked checkbox is only really useful for creating form values such as are stored in a database.
FormHandler Contributors - see HTML::FormHandler
This software is copyright (c) 2017 by Gerda Shank.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.