一款基于jQuery/CSS3实现拼图效果的相册

之前为大家介绍了 HTML5 3D立体图片相册， HTML5图片相册重力感应特效， 基于CSS3图片可倾斜摆放的动画相册 今天我们要来分享一款很酷的jQuery相册插件，首先相册中的图片会以一定的角度倾斜放置在页面上，点击图片缩略图就可以展开图片，并且图片是由所有缩略图拼接而成，图片展开和收拢的动画效果也非常不错。当然图片倾斜需要CSS3支持。效果图如下：

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实现的代码。

html代码：

 <div id="im_wrapper" class="im_wrapper">
        <div style="background-position: 0px 0px;">
            <img src="data:images/thumbs/1.jpg" alt="" /></div>
        <div style="background-position: -125px 0px;">
            <img src="data:images/thumbs/2.jpg" alt="" /></div>
        <div style="background-position: -250px 0px;">
            <img src="data:images/thumbs/3.jpg" alt="" /></div>
        <div style="background-position: -375px 0px;">
            <img src="data:images/thumbs/4.jpg" alt="" /></div>
        <div style="background-position: -500px 0px;">
            <img src="data:images/thumbs/5.jpg" alt="" /></div>
        <div style="background-position: -625px 0px;">
            <img src="data:images/thumbs/6.jpg" alt="" /></div>
        <div style="background-position: 0px -125px;">
            <img src="data:images/thumbs/7.jpg" alt="" /></div>
        <div style="background-position: -125px -125px;">
            <img src="data:images/thumbs/8.jpg" alt="" /></div>
        <div style="background-position: -250px -125px;">
            <img src="data:images/thumbs/9.jpg" alt="" /></div>
        <div style="background-position: -375px -125px;">
            <img src="data:images/thumbs/10.jpg" alt="" /></div>
        <div style="background-position: -500px -125px;">
            <img src="data:images/thumbs/11.jpg" alt="" /></div>
        <div style="background-position: -625px -125px;">
            <img src="data:images/thumbs/12.jpg" alt="" /></div>
        <div style="background-position: 0px -250px;">
            <img src="data:images/thumbs/13.jpg" alt="" /></div>
        <div style="background-position: -125px -250px;">
            <img src="data:images/thumbs/14.jpg" alt="" /></div>
        <div style="background-position: -250px -250px;">
            <img src="data:images/thumbs/15.jpg" alt="" /></div>
        <div style="background-position: -375px -250px;">
            <img src="data:images/thumbs/16.jpg" alt="" /></div>
        <div style="background-position: -500px -250px;">
            <img src="data:images/thumbs/17.jpg" alt="" /></div>
        <div style="background-position: -625px -250px;">
            <img src="data:images/thumbs/18.jpg" alt="" /></div>
        <div style="background-position: 0px -375px;">
            <img src="data:images/thumbs/19.jpg" alt="" /></div>
        <div style="background-position: -125px -375px;">
            <img src="data:images/thumbs/20.jpg" alt="" /></div>
        <div style="background-position: -250px -375px;">
            <img src="data:images/thumbs/21.jpg" alt="" /></div>
        <div style="background-position: -375px -375px;">
            <img src="data:images/thumbs/22.jpg" alt="" /></div>
        <div style="background-position: -500px -375px;">
            <img src="data:images/thumbs/23.jpg" alt="" /></div>
        <div style="background-position: -625px -375px;">
            <img src="data:images/thumbs/24.jpg" alt="" /></div>
    </div>
    <div id="im_loading" class="im_loading">
    </div>
    <div id="im_next" class="im_next">
    </div>
    <div id="im_prev" class="im_prev">
    </div>
    <div>
    </div>

js代码：

 (function ($, sr) {

            var debounce = function (func, threshold, execAsap) {
                var timeout;
                return function debounced() {
                    var obj = this, args = arguments;
                    function delayed() {
                        if (!execAsap)
                            func.apply(obj, args);
                        timeout = null;
                    };
                    if (timeout)
                        clearTimeout(timeout);
                    else if (execAsap)
                        func.apply(obj, args);
                    timeout = setTimeout(delayed, threshold || 100);
                };
            }
            //smartresize
            jQuery.fn[sr] = function (fn) { return fn ? this.bind('resize', debounce(fn)) : this.trigger(sr); };
        })(jQuery, 'smartresize');
    </script>
    <script type="text/javascript">
        $(function () {
            //check if the user made the
            //mistake to open it with IE
            var ie = false;
            if ($.browser.msie)
                ie = true;
            //flag to control the click event
            var flg_click = true;
            //the wrapper
            var $im_wrapper = $('#im_wrapper');
            //the thumbs
            var $thumbs = $im_wrapper.children('div');
            //all the images
            var $thumb_imgs = $thumbs.find('img');
            //number of images
            var nmb_thumbs = $thumbs.length;
            //image loading status
            var $im_loading = $('#im_loading');
            //the next and previous buttons
            var $im_next = $('#im_next');
            var $im_prev = $('#im_prev');
            //number of thumbs per line
            var per_line = 6;
            //number of thumbs per column
            var per_col = Math.ceil(nmb_thumbs / per_line)
            //index of the current thumb
            var current = -1;
            //mode = grid | single
            var mode = 'grid';
            //an array with the positions of the thumbs
            //we will use it for the navigation in single mode
            var positionsArray = [];
            for (var i = 0; i < nmb_thumbs; ++i)
                positionsArray[i] = i;

            //preload all the images
            $im_loading.show();
            var loaded = 0;
            $thumb_imgs.each(function () {
                var $this = $(this);
                $('<img/>').load(function () {
                    ++loaded;
                    if (loaded == nmb_thumbs * 2)
                        start();
                }).attr('src', $this.attr('src'));
                $('<img/>').load(function () {
                    ++loaded;
                    if (loaded == nmb_thumbs * 2)
                        start();
                }).attr('src', $this.attr('src').replace('/thumbs', ''));
            });

            //starts the animation
            function start() {
                $im_loading.hide();
                //disperse the thumbs in a grid
                disperse();
            }

            //disperses the thumbs in a grid based on windows dimentions
            function disperse() {
                if (!flg_click) return;
                setflag();
                mode = 'grid';
                //center point for first thumb along the width of the window
                var spaces_w = $(window).width() / (per_line + 1);
                //center point for first thumb along the height of the window
                var spaces_h = $(window).height() / (per_col + 1);
                //let's disperse the thumbs equally on the page
                $thumbs.each(function (i) {
                    var $thumb = $(this);
                    //calculate left and top for each thumb,
                    //considering how many we want per line
                    var left = spaces_w * ((i % per_line) + 1) - $thumb.width() / 2;
                    var top = spaces_h * (Math.ceil((i + 1) / per_line)) - $thumb.height() / 2;
                    //lets give a random degree to each thumb
                    var r = Math.floor(Math.random() * 41) - 20;
                    /*
                    now we animate the thumb to its final positions;
                    we also fade in its image, animate it to 115x115,
                    and remove any background image    of the thumb - this
                    is not relevant for the first time we call disperse,
                    but when changing from single to grid mode
                    */
                    if (ie)
                        var param = {
                            'left': left + 'px',
                            'top': top + 'px'
                        };
                    else
                        var param = {
                            'left': left + 'px',
                            'top': top + 'px',
                            'rotate': r + 'deg'
                        };
                    $thumb.stop()
                        .animate(param, 700, function () {
                            if (i == nmb_thumbs - 1)
                                setflag();
                        })
                        .find('img')
                        .fadeIn(700, function () {
                            $thumb.css({
                                'background-image': 'none'
                            });
                            $(this).animate({
                                'width': '115px',
                                'height': '115px',
                                'marginTop': '5px',
                                'marginLeft': '5px'
                            }, 150);
                        });
                });
            }

            //controls if we can click on the thumbs or not
            //if theres an animation in progress
            //we don't want the user to be able to click
            function setflag() {
                flg_click = !flg_click
            }

            /*
            when we click on a thumb, we want to merge them
            and show the full image that was clicked.
            we need to animate the thumbs positions in order
            to center the final image in the screen. The
            image itself is the background image that each thumb
            will have (different background positions)
            If we are currently seeing the single image,
            then we want to disperse the thumbs again,
            and with this, showing the thumbs images.
            */
            $thumbs.bind('click', function () {
                if (!flg_click) return;
                setflag();

                var $this = $(this);
                current = $this.index();

                if (mode == 'grid') {
                    mode = 'single';
                    //the source of the full image
                    var image_src = $this.find('img').attr('src').replace('/thumbs', '');

                    $thumbs.each(function (i) {
                        var $thumb = $(this);
                        var $image = $thumb.find('img');
                        //first we animate the thumb image
                        //to fill the thumbs dimentions
                        $image.stop().animate({
                            'width': '100%',
                            'height': '100%',
                            'marginTop': '0px',
                            'marginLeft': '0px'
                        }, 150, function () {
                            //calculate the dimentions of the full image
                            var f_w = per_line * 125;
                            var f_h = per_col * 125;
                            var f_l = $(window).width() / 2 - f_w / 2
                            var f_t = $(window).height() / 2 - f_h / 2
                            /*
                            set the background image for the thumb
                            and animate the thumbs postions and rotation
                            */
                            if (ie)
                                var param = {
                                    'left': f_l + (i % per_line) * 125 + 'px',
                                    'top': f_t + Math.floor(i / per_line) * 125 + 'px'
                                };
                            else
                                var param = {
                                    'rotate': '0deg',
                                    'left': f_l + (i % per_line) * 125 + 'px',
                                    'top': f_t + Math.floor(i / per_line) * 125 + 'px'
                                };
                            $thumb.css({
                                'background-image': 'url(' + image_src + ')'
                            }).stop()
                                .animate(param, 1200, function () {
                                    //insert navigation for the single mode
                                    if (i == nmb_thumbs - 1) {
                                        addNavigation();
                                        setflag();
                                    }
                                });
                            //fade out the thumb's image
                            $image.fadeOut(700);
                        });
                    });
                }
                else {
                    setflag();
                    //remove navigation
                    removeNavigation();
                    //if we are on single mode then disperse the thumbs
                    disperse();
                }
            });

            //removes the navigation buttons
            function removeNavigation() {
                $im_next.stop().animate({ 'right': '-50px' }, 300);
                $im_prev.stop().animate({ 'left': '-50px' }, 300);
            }

            //add the navigation buttons
            function addNavigation() {
                $im_next.stop().animate({ 'right': '0px' }, 300);
                $im_prev.stop().animate({ 'left': '0px' }, 300);
            }

            //User clicks next button (single mode)
            $im_next.bind('click', function () {
                if (!flg_click) return;
                setflag();

                ++current;
                var $next_thumb = $im_wrapper.children('div:nth-child(' + (current + 1) + ')');
                if ($next_thumb.length > 0) {
                    var image_src = $next_thumb.find('img').attr('src').replace('/thumbs', '');
                    var arr = Array.shuffle(positionsArray.slice(0));
                    $thumbs.each(function (i) {
                        //we want to change each divs background image
                        //on a different point of time
                        var t = $(this);
                        setTimeout(function () {
                            t.css({
                                'background-image': 'url(' + image_src + ')'
                            });
                            if (i == nmb_thumbs - 1)
                                setflag();
                        }, arr.shift() * 20);
                    });
                }
                else {
                    setflag();
                    --current;
                    return;
                }
            });

            //User clicks prev button (single mode)
            $im_prev.bind('click', function () {
                if (!flg_click) return;
                setflag();
                --current;
                var $prev_thumb = $im_wrapper.children('div:nth-child(' + (current + 1) + ')');
                if ($prev_thumb.length > 0) {
                    var image_src = $prev_thumb.find('img').attr('src').replace('/thumbs', '');
                    var arr = Array.shuffle(positionsArray.slice(0));
                    $thumbs.each(function (i) {
                        var t = $(this);
                        setTimeout(function () {
                            t.css({
                                'background-image': 'url(' + image_src + ')'
                            });
                            if (i == nmb_thumbs - 1)
                                setflag();
                        }, arr.shift() * 20);
                    });
                }
                else {
                    setflag();
                    ++current;
                    return;
                }
            });

            //on windows resize call the disperse function
            $(window).smartresize(function () {
                removeNavigation()
                disperse();
            });

            //function to shuffle an array
            Array.shuffle = function (array) {
                for (
                    var j, x, i = array.length; i;
                    j = parseInt(Math.random() * i),
                    x = array[--i], array[i] = array[j], array[j] = x
                );
                return array;
            };
        });

via：http://www.w2bc.com/Article/17969