Pro PHP and jQuery by Jason Lengstorf.pdf - Computer Science ...

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350 CHAPTER 10 ■ EXTENDING JQUERY }); // If creating/editing an event, checks for valid dates if ( $(this).siblings("[name=action]").val()=="event_edit" ) { if ( !$.validDate(start) || !$.validDate(end) ) { alert("Valid dates only! (YYYY-MM-DD HH:MM:SS)"); return false; } } // Sends the data to the processing file $.ajax({ type: "POST", url: processFile, data: formData, success: function(data) { // If this is a deleted event, removes // it from the markup if ( remove===true ) { fx.removeevent(); } // Fades out the modal window fx.boxout(); // If this is a new event, adds it to // the calendar if ( $("[name=event_id]").val().length==0 && remove===false ) { fx.addevent(data, formData); } }, error: function(msg) { alert(msg); } }); $(".edit-form a:contains(cancel)") .live("click", function(event){...}); }); After saving the preceding code, you can reload http://localhost/ and try to submit a new event with bad date values. The result is identical to the result obtained when using the original validDate() function.
Adding Methods to jQuery CHAPTER 10■ EXTENDING JQUERY To add a chainable method to the jQuery object, you have to attach it to the fn object of jQuery. This allows you to call the method on a set of selected elements: $(".class").yourPlugin(); ■ Note The fn object of jQuery is actually just an alias for the jQuery object’s prototype object. Modifying the prototype of an object will affect all future instances of that object, rather than just the current instance. For more information on this, check out the brief and simple explanation of the prototype object in JavaScript at http://www.javascriptkit.com/javatutors/proto.shtml. Building Your Plugin The plugin you’ll build in this section will rely on a simple method to enlarge the event titles when a user hovers over them, and then return them to their original size when the user moves his mouse off the title. This plugin will be called dateZoom, and it will allow the user to configure the size, speed, and easing equation used for the animation. Creating a Properly Named Plugin File Your first order of business when creating this plugin is to give it a name. Create a new file in the js folder called jquery.dateZoom.js and insert the custom alias function: (function($){ // plugin code here })(jQuery); Inside this function, attach the new method to the fn object by inserting the following bold code: (function($){ // A plugin that enlarges the text of an element when moused // over, then returns it to its original size on mouse out $.fn.dateZoom = function(options) { // code here }; })(jQuery); 351
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THE EXPERT’S VOICE ® IN OPEN SOU
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ii Pro PHP and jQuery Copyright ©
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iv Contents at a Glance ■About th
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vi ■ CONTENTS Understanding jQuer
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viii ■ CONTENTS Summary .........
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x ■ CONTENTS ■Chapter 9: Perfor
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xii About the Author ■ Jason Leng
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xiv Acknowledgments I feel like I s
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C H A P T E R 1 ■ ■ ■ Introdu
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CHAPTER 1 ■ INTRODUCING JQUERY Th
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SETTING UP A LOCAL TESTING ENVIRONM
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google.load("jquery", "1.4.2");
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Basic Selectors CHAPTER 1 ■ INTRO
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Only one paragraph in our document
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$(".foo+p"); CHAPTER 1 ■ INTRODUC
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$("p:odd"); [ p.foo, p#bar ] Select
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$("p:parent"); [ p, p.foo, p, p#bar
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which returns the following in the
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Selecting Only Enabled or Disabled
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26 CHAPTER 2 ■ COMMON JQUERY ACTI
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C H A P T E R 3 ■ ■ ■ Object-
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$obj = new MyClass; var_dump($obj);
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CHAPTER 3 ■ OBJECT-ORIENTED PROGR
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$obj = new MyClass; // Get the valu
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} public function setProperty($newv
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} } return $this->getProperty(); pu
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Create a new object $newobj = new M
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} } // Create a new object $newobj
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Private Properties and Methods CHAP
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} public function __construct() { e
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*/ CHAPTER 3 ■ OBJECT-ORIENTED PR
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Ease of Implementation CHAPTER 3
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C H A P T E R 4 ■ ■ ■ Build a
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CHAPTER 4 ■ BUILD AN EVENTS CALEN
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# # DocumentRoot: The directory out
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CHAPTER 4 ■ BUILD AN EVENTS CALEN
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} ?> } } } CHAPTER 4 ■ BUILD AN E
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■ Note For the sake of brevity, D
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} ?> CHAPTER 4 ■ BUILD AN EVENTS
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} ?> } include_once $filename; CHAP
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private $_startDay; public function
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138 CHAPTER 4 ■ BUILD AN EVENTS C
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168 CHAPTER 5 ■ ADD CONTROLS TO C
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200 CHAPTER 6 ■ PASSWORD PROTECTI
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P A R T 3 ■ ■ ■ Combining jQu
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236 CHAPTER 7 ■ ENHANCING THE USE
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264 CHAPTER 8 ■ EDITING THE CALEN
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Page 325: P A R T 4 ■ ■ ■ Advancing jQu
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