javascript/test.html at master · nithinmohan/javascript · GitHub

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<html>
<head>
	<style type="text/css">
	body {
		font-size: 12px;
		font-family: sans-serif
	}
	#pic1
	{
		width:250px;
		height: auto;
	}
	</style>
	<script src="jquery.js"></script>
	<script>
// Function to execute a callback when an image has been loaded,
// either from the network or from the browser cache.
var loadImage = function ($image, src, callback) {
// Bind the load event BEFORE setting the src.
$image.bind("load", function (evt) {
// Image has loaded, so unbind event and call callback.
$image.unbind("load");
callback($image);
}).each(function () {
// For Gecko-based browsers, check the complete property,
// and trigger the event manually if image loaded.
if ($image[0].complete) {
	$image.trigger("load");
}
});
// For Webkit browsers, the following line ensures load event fires if
// image src is the same as last image src. This is done by setting
// the src to an empty string initially.
if ($.browser.webkit) {
	$image.attr('src', '');
}
$image.attr('src', src);
};

// Create a single carousel item.
var createItem = function ($image, angle, options) {
var loaded = false, // Flag to indicate image has loaded.
orgWidth, // Original, unscaled width of image.
orgHeight, // Original, unscaled height of image.
$originDiv, // Image is attached to this div.
// A range used in the scale calculation to ensure
// the frontmost item has a scale of 1,
// and the farthest item has a scale as defined
// in options.minScale.
sizeRange = (1 - options.minScale) * 0.5,
// An object to store the public update function.
that;
// Make image invisible and
// set its positioning to absolute.
$image.css({
	opacity: 0,
	position: 'absolute'
});
// Create a div element ($originDiv). The image
// will be attached to it.
$originDiv = $image.wrap('<div style="position:absolute;">').parent();
that = {
	update: function (ang) {
		var sinVal, scale, x, y;
// Rotate the item.
ang += angle;
// Calculate scale.
sinVal = Math.sin(ang);
scale = ((sinVal + 1) * sizeRange) + options.minScale;
// Calculate position and zIndex of origin div.
x = ((Math.cos(ang) * options.radiusX) * scale) + options.width / 2;
y = ((sinVal * options.radiusY) * scale) + options.height / 2;
$originDiv.css({
	left: (x >> 0) + 'px',
	top: (y >> 0) + 'px',
	zIndex: (scale * 100) >> 0
});
// If image has loaded, update its dimensions according to
// the calculated scale.
// Position it relative to the origin div, so the
// origin div is in the center.
if (loaded) {
	$image.css({
		width: (orgWidth * scale) + 'px',
		height: (orgHeight * scale) + 'px',
		top: ((-orgHeight * scale) / 2) + 'px',
		left: ((-orgWidth * scale) / 2) + 'px'
	});
}
}
};
loadImage($image, $image.attr('src'), function ($image) {
	loaded = true;
// Save the image width and height for the scaling calculations.
orgWidth = $image.width();
orgHeight = $image.height();
// Make the item fade-in.
$image.animate({
	opacity: 1
}, 1000);
});
return that;
};
// Create a carousel.
var createCarousel = function ($wrap, options) {
	var items = [],
	rot = 0,
	pause = false,
	unpauseTimeout = 0,
// Now calculate the amount to rotate per frameRate tick.
rotAmount = ( Math.PI * 2) * (options.frameRate/options.rotRate),
$images = $('img', $wrap),
// Calculate the angular spacing between items.
spacing = (Math.PI / $images.length) * 2,
// This is the angle of the first item at
// the front of the carousel.
angle = Math.PI / 2,
i;
// Create a function that is called when the mouse moves over
// or out of an item.
$wrap.bind('mouseover mouseout', function (evt) {
// Has the event been triggered on an image? Return if not.
if (!$(evt.target).is('img')) {
	return;
}
// If mouseover, then pause the carousel.
if (evt.type === 'mouseover') {
// Stop the unpause timeout if it's running.
clearTimeout(unpauseTimeout);
// Indicate carousel is paused.
pause = true;
} else {
// If mouseout, restart carousel, but after a small
// delay to avoid jerking movements as the mouse moves
// between items.
unpauseTimeout = setTimeout(function () {
	pause = false;
}, 200);
}
});
// This loop runs through the list of images and creates
// a carousel item for each one.
for (i = 0; i < $images.length; i++) {
	var image = $images[i];
	var item = createItem($(image), angle, options);
	items.push(item);
	angle += spacing;
}
// The setInterval will rotate all items in the carousel
// every 30ms, unless the carousel is paused.
setInterval(function () {
	if (!pause) {
		rot += rotAmount;
	}
	for (i = 0; i < items.length; i++) {
		items[i].update(rot);
	}
}, options.frameRate);
};
// This is the jQuery plug-in part. It iterates through
// the list of DOM elements that wrap groups of images.
// These groups of images are turned into carousels.
(function ($) {
$.fn.Carousel = function(options) {
	this.each( function() {
// User options are merged with default options.
options = $.extend({}, $.fn.Carousel.defaults, options);
// Each wrapping element is given relative positioning
// (so the absolute positioning of the carousel items works),
// and the width and height are set as specified in the options.
$(this).css({
	position:'relative',
	width: options.width+'px',
	height: options.height +'px'
});
createCarousel($(this),options);
});
};
// These are the default options.
$.fn.Carousel.defaults = {
radiusX:230, // Horizontal radius.
radiusY:80, // Vertical radius.
width:512, // Width of wrapping element.
height:300, // Height of wrapping element.
frameRate: 30, // Frame rate in milliseconds.
rotRate: 5000, // Time it takes for carousel to make one complete rotation.
minScale:0.60 // This is the smallest scale applied to the farthest item.
};})(jQuery);

	$(function(){

// Create a carousel on all wrapping elements
// with a class of .carousel.
$('.carousel').Carousel({
width:511, height:600, // Set wrapping element size.
radiusX:220,radiusY:70, // Set carousel radii.
minScale:0.6 // Set min scale of rearmost item.
});
// Bind a click event to one of the pictures (Mona Lisa)
// to show events are preserved after images become
// carousel items.
$('#pic2').bind('click', function() {
alert('Pic 2 clicked!');
});
});
</script>
</head>
<body>
	<div class="carousel" ><!-- This is the wrapping element -->
<a href="http://en.wikipedia.org/wiki/Self-portrait_(Leonardo_da_Vinci)"
target="_blank">
<img src="hill.png" alt="Pic 1"/>
</a>
<img id="pic2" src="cloud.png" alt="Pic 2"/>
<img src="grass.png" alt="Pic 3"/>
<img src="cloud.png" alt="Pic 4"/>
<img src="grass.png" alt="Pic 5"/>
<img src="cloud.png" alt="Pic 6"/>
<img src="cloud.png" alt="Pic 7"/>
<img src="grass.png" alt="Pic 8"/>
<img src="cloud.png" alt="Pic 9"/>
</div>
</body>
</html>