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Informations about the package contao-form-helper

Contao Form Helper - Extended form rendering

Build Status Version License Downloads Contao Community Alliance coding standard

This library provides extended form widget rendering for Contao frontend form widgets. By default the rendering of Contao forms widgets are not very customizable because of inline html rendering. Adjust output can be quite difficult.

Contao Form Helper provides an event driven form rendering which is fully backward compatible. This means that it supports the html output usually provided by Contao. Also every widgets from extension will work without any customizing.

Contao Form Helper renders the form in two steps. First it creates objects representing the HTML elements before passing them to the templates. Using the event driven interface it is possible to simply change attributes, provide extra features and so on.

Installation

To install the extension simply install netzmacht/contao-form-helper using the Composer repository.

Changelog

Changes between 0.x version and 1.x

How it works

By default this extension enables the extended form rendering for every form widget which is shipped with Contao. They are activated by customized form templates.

The helper creates a view object for each widget. The view contains:

Events

Events are dispatched by the (Contao Event dispatcher)[https://github.com/contao-community-alliance/event-dispatcher]. Each event names are stored in Netzmacht\Contao\FormHelper\Event\Events:

Customizing widgets

There are two ways for manipulating the output. The proposed way is writing your custom events

You can also adjust the rendering using the templates:


<?php
// form_widget.html5
$helper = Netzmacht\Contao\FormHelper\Helper::getInstance();

/** @var Netzmacht\Contao\FromHelper\View */
$view   = $helper->createView($view);
$errors = $view->getErrors();

// display all errors which belongs to an element
$errors->setTemplateName('formhelper_error_all');

// wrapping element can be a string with %s placeholder or an Netzmacht\Html\Node object
$wrapper = '<div class="form-element">%s</div>';

$container = $view->getContainer();
$container->add('wrapper', $wrapper, $container::POSITION_WRAPPER);

echo $view->render();

All versions of contao-form-helper with dependencies

PHP Build Version
Package Version
Requires php Version >=5.3
contao/core Version >=3.1,<3.6-dev
contao-community-alliance/dependency-container Version ~1.0
contao-community-alliance/event-dispatcher Version ~1.0
netzmacht/html Version ~1.0
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