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

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242 CHAPTER 7 ■ ENHANCING THE USER INTERFACE WITH JQUERY /.*?\?(.*)$/ Regular expressions in JavaScript are delimited by forward slashes (/) at each end of the expression. Inside this expression, the pattern looks for zero or more of any character (from left to right) until the first time it reaches a question mark; it then stores all characters after the question mark until the end of the string as a named group for use in the replacement. ■ Note You’ll learn much more about regular expressions and how they work in Chapter 9. Incorporating a Regular Expression into a Script You want to extract the href value of the link that was clicked, so you’ll use the this keyword. In order to use jQuery methods, you have to pass this as the selector to the jQuery function first. Now access the href value with the .attr() method, then call .replace() and extract the query string. When using regular expressions in .replace(), no quotes are used to enclose the pattern. Using the regular expression just described, modify init.js to store the query string from the clicked link in a variable called data; do this by adding the code shown in bold: // Makes sure the document is ready before executing scripts jQuery(function($){ // Pulls up events in a modal window $("li>a").live("click", function(event){ // Stops the link from loading view.php event.preventDefault(); // Adds an "active" class to the link $(this).addClass("active"); // Gets the query string from the link href var data = $(this) .attr("href") .replace(/.+?\?(.*)$/, "$1"); // Logs the query string console.log( data );
}); }); CHAPTER 7 ■ ENHANCING THE USER INTERFACE WITH JQUERY Save this code, then reload http://localhost/ and click a link. You should see something similar to the following appear in the console: event_id=1 Creating a Modal Window The next step is to generate the HTML markup that will actually create the modal window and overlay. This markup is extremely simple, and it will basically consist of a div element wrapped around other content. For example, the New Year's Day event modal window markup will look like this: New Year's Day January 01, 2010, 12:00am—11:59pm Happy New Year! You are going to use this same modal window for other features as well (such as for displaying the editing form for events), so the actual creation of the modal window is going to be abstracted in a separate function for easy re-use. Because you will re-use more than one function, you’ll organize your script by placing all utility functions in an object literal, which is a comma-separated list of name-value pairs (for more information, see the sidebar, “Using an Object Literal for Utility Functions”). Creating the Utility Function to Check for a Modal Window At the top of init.js, declare a new object literal called fx to store your utility functions: // Makes sure the document is ready before executing scripts jQuery(function($){ // Functions to manipulate the modal window var fx = {}; // Pulls up events in a modal window $("li>a").live("click", function(event){ // Stops the link from loading view.php event.preventDefault(); // Adds an "active" class to the link $(this).addClass("active"); // Gets the query string from the link href 243
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THE EXPERT’S VOICE ® IN OPEN SOU
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ii Pro PHP and jQuery Copyright ©
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iv Contents at a Glance ■About th
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vi ■ CONTENTS Understanding jQuer
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viii ■ CONTENTS Summary .........
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x ■ CONTENTS ■Chapter 9: Perfor
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xii About the Author ■ Jason Leng
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xiv Acknowledgments I feel like I s
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C H A P T E R 1 ■ ■ ■ Introdu
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CHAPTER 1 ■ INTRODUCING JQUERY Th
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SETTING UP A LOCAL TESTING ENVIRONM
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google.load("jquery", "1.4.2");
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Basic Selectors CHAPTER 1 ■ INTRO
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Only one paragraph in our document
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$(".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 $_startDay; public function
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138 CHAPTER 4 ■ BUILD AN EVENTS C
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168 CHAPTER 5 ■ ADD CONTROLS TO C
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Page 249: P A R T 3 ■ ■ ■ Combining jQu
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292 CHAPTER 8 ■ EDITING THE CALEN
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P A R T 4 ■ ■ ■ Advancing jQu
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312 CHAPTER 9 ■ PERFORMING FORM V
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C H A P T E R 10 ■ ■ ■ Extend
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$.validDate = function(date, option
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Modifying the Initialization Script
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Adding Methods to jQuery CHAPTER 10
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over, then returns it to its origin
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CHAPTER 10■ EXTENDING JQUERY ■
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Defines default values for the plug
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}); // Loads the event data from th
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■ ■ ■ Index ■ Special Chara
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■ C Calendar app JavaScript initi
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saving new calendar events in addin
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:eq( ) method, 17, 20, 26-27 equals
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eginning of string, 324 character c
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asic selectors in by class name, 12
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.die( ) method, 75-76 .error( ) met
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.parents( ) method, 33 .parentsUnti
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overview, 328 regex pattern to vali
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