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| author | Derek Jones <derek.jones@ellislab.com> | 2011-10-05 20:34:52 +0200 |
|---|---|---|
| committer | Derek Jones <derek.jones@ellislab.com> | 2011-10-05 20:34:52 +0200 |
| commit | 8ede1a2ecbb62577afd32996956c5feaf7ddf9b6 (patch) | |
| tree | 2e960ec3b416b477f40bb546371f2d486f4a22f0 /user_guide_src/source/libraries/javascript.rst | |
| parent | d1ecd5cd4ae6ab5d37df9fbda14b93977b9e743c (diff) | |
replacing the old HTML user guide with a Sphinx-managed user guide
Diffstat (limited to 'user_guide_src/source/libraries/javascript.rst')
| -rw-r--r-- | user_guide_src/source/libraries/javascript.rst | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/user_guide_src/source/libraries/javascript.rst b/user_guide_src/source/libraries/javascript.rst new file mode 100644 index 000000000..12eb94dac --- /dev/null +++ b/user_guide_src/source/libraries/javascript.rst @@ -0,0 +1,291 @@ +.. 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: + +- "event" is any of blur, change, click, dblclick, error, focus, hover, + keydown, keyup, load, mousedown, mouseup, mouseover, mouseup, resize, + scroll, or unload. +- "element_path" is any valid `jQuery + selector <http://docs.jquery.com/Selectors>`_. Due to jQuery's unique + selector syntax, this is usually an element id, or CSS selector. For + example "#notice_area" would effect <div id="notice_area">, and + "#content a.notice" would effect all anchors with a class of "notice" + in the div with id "content". +- "code_to_run()" is script your write yourself, or an action such as + an effect from the jQuery library below. + +Effects +======= + +The query library supports a powerful +`Effects <http://docs.jquery.com/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); + + +- "target" will be any valid jQuery selector or selectors. +- "speed" is optional, and is set to either slow, normal, fast, or + alternatively a number of milliseconds. +- "extra information" is optional, and could include a callback, or + other additional 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); + + +- "target" will be any valid jQuery selector or selectors. + +animate() +--------- + +:: + + $this->jquery->animate(target, parameters, optional speed, optional extra information); + + +- "target" will be any valid jQuery selector or selectors. +- "parameters" in jQuery would generally include a series of CSS + properties that you wish to change. +- "speed" is optional, and is set to either slow, normal, fast, or + alternatively a number of milliseconds. +- "extra information" is optional, and could include a callback, or + other additional information. + +For a full summary, see +`http://docs.jquery.com/Effects/animate <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); + + +- "target" will be any valid jQuery selector or selectors. +- "speed" is optional, and is set to either slow, normal, fast, or + alternatively a number of milliseconds. +- "extra information" is optional, and could include a callback, or + other additional information. + +toggleClass() +------------- + +This function will add or remove a CSS class to its target. + +:: + + $this->jquery->toggleClass(target, class) + + +- "target" will be any valid jQuery selector or selectors. +- "class" is any CSS classname. Note that this class must be defined + and available in a CSS that is already loaded. + +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); + + +- "target" will be any valid jQuery selector or selectors. +- "speed" is optional, and is set to either slow, normal, fast, or + alternatively a number of milliseconds. +- "extra information" is optional, and could include a callback, or + other additional 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); + + +- "target" will be any valid jQuery selector or selectors. +- "speed" is optional, and is set to either slow, normal, fast, or + alternatively a number of milliseconds. +- "extra information" is optional, and could include a callback, or + other additional 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/ <http://www.malsup.com/jquery/corner/>`_ + +:: + + $this->jquery->corner(target, corner_style); + + +- "target" will be any valid jQuery selector or selectors. +- "corner_style" is optional, and can be set to any valid style such + as round, sharp, bevel, bite, dog, etc. Individual corners can be set + by following the style with a space and using "tl" (top left), "tr" + (top right), "bl" (bottom left), or "br" (bottom right). + +:: + + $this->jquery->corner("#note", "cool tl br"); + + +tablesorter() +------------- + +description to come + +modal() +------- + +description to come + +calendar() +---------- + +description to come |