jQuery 1.4 Animation Techniques - Index of

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clear:both; } div#fadeLeft, div#fadeRight { width:48px; height:21px; margin:0; position:absolute; top:17px; left:210px; background:url(../img/fadeLeft.png) no-repeat; } div#fadeRight { left:906px; background:url(../img/fadeRight.png) no-repeat; } [ 225 ] Chapter 8 5. When we run the page now, we should see that the new marquee element, along with its links, is inserted into the page: The previous screenshot shows the elements in the new marquee section including the heading, the links themselves, and the fade elements which are added purely for aesthetics. What just happened? All of our JavaScript is wrapped up in jQuery's getJSON() method, which uses jQuery's AJAX functionality to make a request to the URL specified as the first argument to the method. The second argument is an anonymous function that is executed if the request is successful. The returned JSON data is passed to this function automatically.
Other Popular Animations Within the function we first create some of the elements that make up our marquee including the outer container, the heading and two purely aesthetic elements used to add the left and right fade effect at the start and end of the row of links. All of these elements are stored in variables so that we can access them easily when required. Next we process the JSON object passed into the function. Remember, this object contains a series of properties where the values of some of these properties are arrays, such as the posts array, which contains each of the returned posts as objects within each of its array items. We use a for loop to iterate over each object in the posts array that is returned with the JSON object. This object contains a property called count, where the number of posts that are returned is stored as an integer, so we can use this to tell the for loop how many times to execute, which is marginally easier than counting the objects in the posts array. For each post that has been returned, we create a new element, setting its href to point to the url property of the current object, and the title and text of the element set to the title property of the current object, and then append the new to the marquee element that we created a minute ago. Once we've created and appended a link for each post, we then wrap the contents of the marquee element (the links) in a new , prepend the to the start of the marquee, and append the elements for the fades to the end of the marquee element. We then append the marquee to the page before sliding it into view with the slideDown() method. At this point we need to set a width on the container that we wrapped the links in a moment ago. This is so that the links can all line up in a single row. We need to take into account the width of each link, plus any margin it has (which we set in the CSS). We use a function as the value of jQuery's width() method to iterate over each link and add its width and margin to a running total. We can't do this until the marquee has been appended to the page because it is not until this point that each element actually has a width or margin that we can retrieve. The last thing we do in the callback function for our getSJON() method is fire off a custom event with the trigger() jQuery method. The custom event is called marquee-ready and is used to tell our script when the marquee has been added to the page. We'll use this custom event shortly to animate the post links. We also added some new CSS to our stylesheet. Some of this code is to give our marquee elements the same light skin as the rest of the page. But other parts of it, such as floating the links, and setting the marquee's overflow property to hidden is so that the links line up in a single row, and so that the majority of the links are hidden, ready to be scrolled into view. We also add the fade images to the last two elements inside the marquee element. [ 226 ]
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Download from Wow! eBook jQuery 1.
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Author Dan Wellman Reviewers Shaifu
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About the Author Dan Wellman is an
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Cyril Pierron is an engineer, a web
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For Pat Spacagna, the greatest moth
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Download from Wow! eBook Table of
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Table of Contents Time for action -
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Table of Contents jQuery and transf
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Drawing to the canvas 309 Supportin
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Preface What this book covers Chapt
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Preface Have a go hero - heading Th
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Preface Piracy Piracy of copyright
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Introduction In addition to animate
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Introduction When not to use animat
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Introduction of the template file"
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Introduction In the previous screen
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Introduction Once our variables hav
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2 Fading Animations In this chapter
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[ 21 ] Chapter 2 We can control the
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The previous screenshot shows how t
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[ 25 ] Chapter 2 Most of the styles
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2. What else can be passed into the
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Time for action - creating the dial
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[ 31 ] Chapter 2 For example, the a
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Download from Wow! eBook The follo
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[ 35 ] Chapter 2 The CSS is used mo
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The fadeTo() method is used in the
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[ 39 ] Chapter 2 #messageList table
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[ 41 ] Chapter 2 What just happened
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2. What format can these arguments
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} var el = $(this); if (el.css("fil
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[ 47 ] Chapter 2 Usually these meth
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Time for action - animations with s
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Download from Wow! eBook [ 51 ] Ch
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2. Save the changes as toggle.html.
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3 Managing Animations Like most of
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[ 57 ] Chapter 3 A custom queue tha
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If we wish to see how many function
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2. What does the queue() method ret
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[ 63 ] Chapter 3 The argument we su
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[ 65 ] Chapter 3 We pass a callback
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[ 67 ] Chapter 3 The first argument
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Delaying queue execution [ 69 ] Cha
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[ 71 ] Chapter 3 Also note that the
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4 Sliding Animations Another type o
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Time for action - creating a slide-
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[ 77 ] Chapter 4 header form input
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Pop quiz - sliding elements down 1.
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Download from Wow! eBook }); }); $
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Toggling the slide [ 83 ] Chapter 4
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[ 85 ] Chapter 4 } h2 { margin:0; p
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[ 87 ] Chapter 4 The previous scree
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Pop quiz - using slideToggle 1. Wha
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[ 91 ] Chapter 4 Easing is a great
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[ 93 ] Chapter 4 Home Articles J
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[ 95 ] Chapter 4 3. Save this file
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In the previous screenshot, we see
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Pop quiz - fixing the flicker 1. Wh
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5 Custom Animations The predefined
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An alternative syntax for animate()
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[ 105 ] Chapter 5 width:295px; marg
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[ 107 ] Chapter 5 What just happene
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[ 109 ] Chapter 5 Although not esse
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[ 111 ] Chapter 5 The previous scre
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[ 113 ] Chapter 5 The styles we use
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}, html: copy, width: expander.widt
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[ 119 ] Chapter 5 If the image alre
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[ 121 ] Chapter 5 d. Two objects wh
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[ 123 ] Chapter 5 text-align:center
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[ 127 ] Chapter 5 Finally, we retur
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[ 129 ] Chapter 5 Once we've define
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} }; $(config.selector).find("a").c
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[ 133 ] Chapter 5 In the previous s
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Have a go hero - extending the plug
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Extended Animations with jQuery UI
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Download from Wow! eBook Extended
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Page 195 and 196: Extended Animations with jQuery UI
Page 201 and 202: Full Page Animations Can we animate
Page 203 and 204: Full Page Animations display:block;
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Page 207 and 208: Full Page Animations Have a go hero
Page 209 and 210: Full Page Animations 4. Save this f
Page 211 and 212: Full Page Animations 2. The bgpos c
Page 213 and 214: Full Page Animations nav ul { margi
Page 215 and 216: Full Page Animations screensize = {
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Page 221 and 222: Full Page Animations Pop quiz - cre
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Page 259 and 260: CSS3 Animations Calculating the sin
Page 261 and 262: CSS3 Animations The filter property
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Page 265 and 266: CSS3 Animations } el.filters.item("
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Page 287 and 288: Canvas Animations Subjects that we'
Page 289 and 290: Canvas Animations We can set the co
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Canvas Animations For the next part
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Canvas Animations Time for action -
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Canvas Animations 3. Save the new p
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Canvas Animations Once the rectangl
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Canvas Animations We then define tw
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Canvas Animations }, context.lineTo
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Canvas Animations Creating a canvas
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Canvas Animations What just happene
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Canvas Animations What just happene
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Canvas Animations aliens.splice(x,
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Canvas Animations Pop quiz - creati
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Download from Wow! eBook
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Pop Quiz Answers Using fadeToggle()
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Pop Quiz Answers Using slideToggle
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Pop Quiz Answers Implementing the p
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Pop Quiz Answers Animating the canv
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show() or hide() method, triggering
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cssHooks using 239 cssHooks feature
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fading animations 20 flicker effect
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proximity animations about 207 exte
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scaleY 232 skew 232 skewX 232 skewY
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jQuery 1.4 Reference Guide ISBN: 97
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