Podręcznik użytkownika CodeIgniter wersja 2.2.1


Note: This driver is experimental. Its feature set and implementation may change in future releases.


Javascript Class

CodeIgniter provides a library to help you with certain common functions that you may want to use with Javascript. Please note that CodeIgniter does not require the jQuery library to run, and that any scripting library will work equally well. The jQuery library is simply presented as a convenience if you choose to use it.

Initializing the Class

To initialize the Javascript class manually in your controller constructor, use the $this->load->library function. Currently, the only available library is jQuery, which will automatically be loaded like this:

$this->load->library('javascript');

The Javascript class also accepts parameters, js_library_driver (string) default 'jquery' and autoload (bool) default TRUE. You may override the defaults if you wish by sending an associative array:

$this->load->library('javascript', array('js_library_driver' => 'scripto', 'autoload' => FALSE));

Again, presently only 'jquery' is available. You may wish to set autoload to FALSE, though, if you do not want the jQuery library to automatically include a script tag for the main jQuery script file. This is useful if you are loading it from a location outside of CodeIgniter, or already have the script tag in your markup.

Once loaded, the jQuery library object will be available using: $this->javascript

Setup and Configuration

Set these variables in your view

As a Javascript library, your files must be available to your application.

As Javascript is a client side language, the library must be able to write content into your final output. This generally means a view. You'll need to include the following variables in the <head> sections of your output.

<?php echo $library_src;?>
<?php echo $script_head;?>

$library_src, is where the actual library file will be loaded, as well as any subsequent plugin script calls; $script_head is where specific events, functions and other commands will be rendered.

Set the path to the librarys with config items

There are some configuration items in Javascript library. These can either be set in application/config.php, within its own config/javascript.php file, or within any controller usings the set_item() function.

An image to be used as an "ajax loader", or progress indicator. Without one, the simple text message of "loading" will appear when Ajax calls need to be made.

$config['javascript_location'] = 'http://localhost/codeigniter/themes/js/jquery/';
$config['javascript_ajax_img'] = 'images/ajax-loader.gif';

If you keep your files in the same directories they were downloaded from, then you need not set this configuration items.

The jQuery Class

To initialize the jQuery class manually in your controller constructor, use the $this->load->library function:

$this->load->library('jquery');

You may send an optional parameter to determine whether or not a script tag for the main jQuery file will be automatically included when loading the library. It will be created by default. To prevent this, load the library as follows:

$this->load->library('jquery', FALSE);

Once loaded, the jQuery library object will be available using: $this->jquery

jQuery Events

Events are set using the following syntax.

$this->jquery->event('element_path', code_to_run());

In the above example:

Effects

The query library supports a powerful Effects repertoire. Before an effect can be used, it must be loaded:

$this->jquery->effect([optional path] plugin name); // for example $this->jquery->effect('bounce');

hide() / show()

Each of this functions will affect the visibility of an item on your page. hide() will set an item invisible, show() will reveal it.

$this->jquery->hide(target, optional speed, optional extra information);
$this->jquery->show(target, optional speed, optional extra information);

toggle()

toggle() will change the visibility of an item to the opposite of its current state, hiding visible elements, and revealing hidden ones.

$this->jquery->toggle(target);

animate()

$this->jquery->animate(target, parameters, optional speed, optional extra information);

For a full summary, see http://docs.jquery.com/Effects/animate

Here is an example of an animate() called on a div with an id of "note", and triggered by a click using the jQuery library's click() event.

$params = array(
'height' => 80,
'width' => '50%',
'marginLeft' => 125
);
$this->jquery->click('#trigger', $this->jquery->animate('#note', $params, normal));

fadeIn() / fadeOut()

$this->jquery->fadeIn(target, optional speed, optional extra information);
$this->jquery->fadeOut(target, optional speed, optional extra information);

toggleClass()

This function will add or remove a CSS class to its target.

$this->jquery->toggleClass(target, class)

fadeIn() / fadeOut()

These effects cause an element(s) to disappear or reappear over time.

$this->jquery->fadeIn(target, optional speed, optional extra information);
$this->jquery->fadeOut(target, optional speed, optional extra information);

slideUp() / slideDown() / slideToggle()

These effects cause an element(s) to slide.

$this->jquery->slideUp(target, optional speed, optional extra information);
$this->jquery->slideDown(target, optional speed, optional extra information);
$this->jquery->slideToggle(target, optional speed, optional extra information);

Plugins

Some select jQuery plugins are made available using this library.

corner()

Used to add distinct corners to page elements. For full details see http://www.malsup.com/jquery/corner/

$this->jquery->corner(target, corner_style);

$this->jquery->corner("#note", "cool tl br");

tablesorter()

description to come

modal()

description to come

calendar()

description to come