user_guide_src/source/helpers/smiley_helper.rst - code-igniter-v3-giggi - Gitiles

 #############
 Smiley Helper
 #############

 The Smiley Helper file contains functions that let you manage smileys
 (emoticons).

 .. contents:: Page Contents

 Loading this Helper
 ===================

 This helper is loaded using the following code

 ::

 	$this->load->helper('smiley');

 Overview
 ========

 The Smiley helper has a renderer that takes plain text simileys, like
 :-) and turns them into a image representation, like |smile!|

 It also lets you display a set of smiley images that when clicked will
 be inserted into a form field. For example, if you have a blog that
 allows user commenting you can show the smileys next to the comment
 form. Your users can click a desired smiley and with the help of some
 JavaScript it will be placed into the form field.

 Clickable Smileys Tutorial
 ==========================

 Here is an example demonstrating how you might create a set of clickable
 smileys next to a form field. This example requires that you first
 download and install the smiley images, then create a controller and the
 View as described.

 .. important:: Before you begin, please `download the smiley images <http://codeigniter.com/download_files/smileys.zip>`_
 	and put them in a publicly accessible place on your server. This helper
 	also assumes you have the smiley replacement array located at
 	`application/config/smileys.php`

 The Controller
 --------------

 In your `application/controllers/` folder, create a file called
 smileys.php and place the code below in it.

 .. important:: Change the URL in the `get_clickable_smileys()`
 	function below so that it points to your smiley folder.

 You'll notice that in addition to the smiley helper we are using the :doc:`Table Class <../libraries/table>`.

 ::

 	<?php

 	class Smileys extends CI_Controller {

 		function index()
 		{
 			$this->load->helper('smiley');
 			$this->load->library('table');

 			$image_array = get_clickable_smileys('http://example.com/images/smileys/', 'comments');
 			$col_array = $this->table->make_columns($image_array, 8);

 			$data['smiley_table'] = $this->table->generate($col_array);
 			$this->load->view('smiley_view', $data);
 		}
 	}

 In your `application/views/` folder, create a file called `smiley_view.php`
 and place this code in it:

 ::

 	<html>
 		<head>
 			<title>Smileys</title>
 			<?php echo smiley_js(); ?>
 		</head>
 		<body>
 			<form name="blog">
 				<textarea name="comments" id="comments" cols="40" rows="4"></textarea>
 			</form>
 			<p>Click to insert a smiley!</p>
 			<?php echo $smiley_table; ?> </body> </html>
 			When you have created the above controller and view, load it by visiting http://www.example.com/index.php/smileys/
 		</body>
 	</html>

 Field Aliases
 -------------

 When making changes to a view it can be inconvenient to have the field
 id in the controller. To work around this, you can give your smiley
 links a generic name that will be tied to a specific id in your view.

 ::

 	$image_array = get_smiley_links("http://example.com/images/smileys/", "comment_textarea_alias");

 To map the alias to the field id, pass them both into the `smiley_js`
 function

 ::

 	$image_array = smiley_js("comment_textarea_alias", "comments");

 ******************
 Function Reference
 ******************

 get_clickable_smileys()
 =======================

 Returns an array containing your smiley images wrapped in a clickable
 link. You must supply the URL to your smiley folder and a field id or
 field alias.

 ::

 	$image_array = get_smiley_links("http://example.com/images/smileys/", "comment");

 Note: Usage of this function without the second parameter, in
 combination with `js_insert_smiley` has been deprecated.

 smiley_js()
 ===========

 Generates the JavaScript that allows the images to be clicked and
 inserted into a form field. If you supplied an alias instead of an id
 when generating your smiley links, you need to pass the alias and
 corresponding form id into the function. This function is designed to be
 placed into the <head> area of your web page.

 ::

 	<?php echo smiley_js(); ?>

 Note: This function replaces `js_insert_smiley`, which has been
 deprecated.

 parse_smileys()
 ===============

 Takes a string of text as input and replaces any contained plain text
 smileys into the image equivalent. The first parameter must contain your
 string, the second must contain the URL to your smiley folder

 ::

 	$str = 'Here are some simileys: :-)  ;-)';
 	$str = parse_smileys($str, "http://example.com/images/smileys/");
 	echo $str;


 .. |smile!| image:: ../images/smile.gif
	#############
	Smiley Helper
	#############

	The Smiley Helper file contains functions that let you manage smileys
	(emoticons).

	.. contents:: Page Contents

	Loading this Helper
	===================

	This helper is loaded using the following code

	::

	$this->load->helper('smiley');

	Overview
	========

	The Smiley helper has a renderer that takes plain text simileys, like
	:-) and turns them into a image representation, like \|smile!\|

	It also lets you display a set of smiley images that when clicked will
	be inserted into a form field. For example, if you have a blog that
	allows user commenting you can show the smileys next to the comment
	form. Your users can click a desired smiley and with the help of some
	JavaScript it will be placed into the form field.

	Clickable Smileys Tutorial
	==========================

	Here is an example demonstrating how you might create a set of clickable
	smileys next to a form field. This example requires that you first
	download and install the smiley images, then create a controller and the
	View as described.

	.. important:: Before you begin, please `download the smiley images <http://codeigniter.com/download_files/smileys.zip>`_
	and put them in a publicly accessible place on your server. This helper
	also assumes you have the smiley replacement array located at
	`application/config/smileys.php`

	The Controller
	--------------

	In your `application/controllers/` folder, create a file called
	smileys.php and place the code below in it.

	.. important:: Change the URL in the `get_clickable_smileys()`
	function below so that it points to your smiley folder.

	You'll notice that in addition to the smiley helper we are using the :doc:`Table Class <../libraries/table>`.

	::

	<?php

	class Smileys extends CI_Controller {

	function index()
	{
	$this->load->helper('smiley');
	$this->load->library('table');

	$image_array = get_clickable_smileys('http://example.com/images/smileys/', 'comments');
	$col_array = $this->table->make_columns($image_array, 8);

	$data['smiley_table'] = $this->table->generate($col_array);
	$this->load->view('smiley_view', $data);
	}
	}

	In your `application/views/` folder, create a file called `smiley_view.php`
	and place this code in it:

	::

	<html>
	<head>
	<title>Smileys</title>
	<?php echo smiley_js(); ?>
	</head>
	<body>
	<form name="blog">
	<textarea name="comments" id="comments" cols="40" rows="4"></textarea>
	</form>
	<p>Click to insert a smiley!</p>
	<?php echo $smiley_table; ?> </body> </html>
	When you have created the above controller and view, load it by visiting http://www.example.com/index.php/smileys/
	</body>
	</html>

	Field Aliases
	-------------

	When making changes to a view it can be inconvenient to have the field
	id in the controller. To work around this, you can give your smiley
	links a generic name that will be tied to a specific id in your view.

	::

	$image_array = get_smiley_links("http://example.com/images/smileys/", "comment_textarea_alias");

	To map the alias to the field id, pass them both into the `smiley_js`
	function

	::

	$image_array = smiley_js("comment_textarea_alias", "comments");

	******************
	Function Reference
	******************

	get_clickable_smileys()
	=======================

	Returns an array containing your smiley images wrapped in a clickable
	link. You must supply the URL to your smiley folder and a field id or
	field alias.

	::

	$image_array = get_smiley_links("http://example.com/images/smileys/", "comment");

	Note: Usage of this function without the second parameter, in
	combination with `js_insert_smiley` has been deprecated.

	smiley_js()
	===========

	Generates the JavaScript that allows the images to be clicked and
	inserted into a form field. If you supplied an alias instead of an id
	when generating your smiley links, you need to pass the alias and
	corresponding form id into the function. This function is designed to be
	placed into the <head> area of your web page.

	::

	<?php echo smiley_js(); ?>

	Note: This function replaces `js_insert_smiley`, which has been
	deprecated.

	parse_smileys()
	===============

	Takes a string of text as input and replaces any contained plain text
	smileys into the image equivalent. The first parameter must contain your
	string, the second must contain the URL to your smiley folder

	::

	$str = 'Here are some simileys: :-) ;-)';
	$str = parse_smileys($str, "http://example.com/images/smileys/");
	echo $str;


	.. \|smile!\| image:: ../images/smile.gif