jQuery 1.4 Animation Techniques - Index of

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4 Sliding Animations Another type of effect that is built into jQuery is the slide effect. Elements can be made to slide vertically so that they appear to open or close depending on their current state. There are three methods related to sliding that are exposed by jQuery: slideDown() slideUp() slideToggle() How each of these methods works will be explored thoroughly over the course of this chapter. Some of the skills we'll learn include: Showing hidden elements with slideDown() Hiding visible elements with slideUp() How an element's CSS styling can influence sliding animations How we can save code with slideToggle() How to add easing effects to sliding animations How to deal with a common usability issue with sliding animations triggered by hover events You should note that the sliding methods all work with the display style property of the selected element(s), and are used to either show or hide the element in question by sliding it open or closed.
Sliding Animations Sliding elements into view When an element is hidden from view using display:none; we can easily show the element using the slideDown() method. This method may take the following form: jQuery(elements).slideDown([duration], [easing] [callback]); The optional duration argument may take either integer or string formats just like the animation methods we have already looked at, and the default duration of 400 milliseconds will be used when no duration argument is supplied. As before, an easing function may also be supplied as the second argument, and a callback function, if supplied, will be executed once for each selected element once the animation has completed. The slideDown() method works by changing an element's display property from none to block in the same way that fade animations do. If an element requires a different display mode, such as inline-block for example, this will need to be set using the optional callback function, or by using a nested element within the element that has slideDown() called on it. As well as the display property, the method also adjusts the target element's height property to gradually reveal the hidden element. The height of the target element is calculated by jQuery, so things that affect this, such as padding or margin, can affect how the animation displays as it runs. Sliding an element that does have padding or margin applied to it can cause the animation to run unusually, with the elements inside the animated element also appearing to move. Padding or margin can also cause animations to be choppy or uneven when being run. Elements that do not have fixed widths can also cause problems when animated with slideDown(), slideUp(), or slideToggle(). This can also cause a small jump at the end of a slide animation in some browsers. If margin or padding is required, or if a fixed width is not possible, it is advisable to use a wrapper element in conjunction with the target element to run the animation on, or to give the required padding or margin. All of the sliding methods return the original jQuery object and so are perfectly safe for chaining. Additionally, the sliding effects will be stored in the selected element's fx queue when several are chained to a single element. [ 74 ]
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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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[ 123 ] Chapter 5 text-align:center
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[ 125 ] Chapter 5 What just happene
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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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Full Page Animations Can we animate
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Full Page Animations display:block;
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Download from Wow! eBook Full Page
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Full Page Animations Have a go hero
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Full Page Animations 4. Save this f
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Full Page Animations 2. The bgpos c
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Full Page Animations nav ul { margi
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Full Page Animations screensize = {
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Full Page Animations What just happ
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Full Page Animations The second sec
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Full Page Animations Time for actio
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Full Page Animations Next we define
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[ 209 ] Chapter 8 } .slider #scroll
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}), pointerText = "Use your pointer
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prox.mousemove(function(ev) { goAni
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Pop quiz - implementing proximity a
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clear:both; } div#fadeLeft, div#fad
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Time for action - animating the pos
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CSS3 Animations The following trans
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CSS3 Animations Units It is of crit
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CSS3 Animations Skew Remember the t
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CSS3 Animations Calculating the sin
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CSS3 Animations The filter property
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CSS3 Animations If, like me, you th
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CSS3 Animations } el.filters.item("
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CSS3 Animations An unfortunate prob
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CSS3 Animations The context of this
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CSS3 Animations The first variable
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CSS3 Animations Time for action - a
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CSS3 Animations We also have to upd
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CSS3 Animations flatMatrix[3] = fla
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CSS3 Animations When updating the s
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CSS3 Animations translate translate
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Canvas Animations Subjects that we'
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Canvas Animations We can set the co
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Download from Wow! eBook Canvas An
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Canvas Animations All imageData obj
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Canvas Animations context.beginPath
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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 }, 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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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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