1/** 2 * jCarouselLite - jQuery plugin to navigate images/any content in a carousel style widget. 3 * @requires jQuery v1.2 or above 4 * 5 * http://gmarwaha.com/jquery/jcarousellite/ 6 * 7 * Copyright (c) 2007 Ganeshji Marwaha (gmarwaha.com) 8 * Dual licensed under the MIT and GPL licenses: 9 * http://www.opensource.org/licenses/mit-license.php 10 * http://www.gnu.org/licenses/gpl.html 11 * 12 * Version: 1.0.1 13 * Note: Requires jquery 1.2 or above from version 1.0.1 14 */ 15 16/** 17 * Creates a carousel-style navigation widget for images/any-content from a simple HTML markup. 18 * 19 * The HTML markup that is used to build the carousel can be as simple as... 20 * 21 * <div class="carousel"> 22 * <ul> 23 * <li><img src="image/1.jpg" alt="1"></li> 24 * <li><img src="image/2.jpg" alt="2"></li> 25 * <li><img src="image/3.jpg" alt="3"></li> 26 * </ul> 27 * </div> 28 * 29 * As you can see, this snippet is nothing but a simple div containing an unordered list of images. 30 * You don't need any special "class" attribute, or a special "css" file for this plugin. 31 * I am using a class attribute just for the sake of explanation here. 32 * 33 * To navigate the elements of the carousel, you need some kind of navigation buttons. 34 * For example, you will need a "previous" button to go backward, and a "next" button to go forward. 35 * This need not be part of the carousel "div" itself. It can be any element in your page. 36 * Lets assume that the following elements in your document can be used as next, and prev buttons... 37 * 38 * <button class="prev"><<</button> 39 * <button class="next">>></button> 40 * 41 * Now, all you need to do is call the carousel component on the div element that represents it, and pass in the 42 * navigation buttons as options. 43 * 44 * $(".carousel").jCarouselLite({ 45 * btnNext: ".next", 46 * btnPrev: ".prev" 47 * }); 48 * 49 * That's it, you would have now converted your raw div, into a magnificient carousel. 50 * 51 * There are quite a few other options that you can use to customize it though. 52 * Each will be explained with an example below. 53 * 54 * @param an options object - You can specify all the options shown below as an options object param. 55 * 56 * @option btnPrev, btnNext : string - no defaults 57 * @example 58 * $(".carousel").jCarouselLite({ 59 * btnNext: ".next", 60 * btnPrev: ".prev" 61 * }); 62 * @desc Creates a basic carousel. Clicking "btnPrev" navigates backwards and "btnNext" navigates forward. 63 * 64 * @option btnGo - array - no defaults 65 * @example 66 * $(".carousel").jCarouselLite({ 67 * btnNext: ".next", 68 * btnPrev: ".prev", 69 * btnGo: [".0", ".1", ".2"] 70 * }); 71 * @desc If you don't want next and previous buttons for navigation, instead you prefer custom navigation based on 72 * the item number within the carousel, you can use this option. Just supply an array of selectors for each element 73 * in the carousel. The index of the array represents the index of the element. What i mean is, if the 74 * first element in the array is ".0", it means that when the element represented by ".0" is clicked, the carousel 75 * will slide to the first element and so on and so forth. This feature is very powerful. For example, i made a tabbed 76 * interface out of it by making my navigation elements styled like tabs in css. As the carousel is capable of holding 77 * any content, not just images, you can have a very simple tabbed navigation in minutes without using any other plugin. 78 * The best part is that, the tab will "slide" based on the provided effect. :-) 79 * 80 * @option mouseWheel : boolean - default is false 81 * @example 82 * $(".carousel").jCarouselLite({ 83 * mouseWheel: true 84 * }); 85 * @desc The carousel can also be navigated using the mouse wheel interface of a scroll mouse instead of using buttons. 86 * To get this feature working, you have to do 2 things. First, you have to include the mouse-wheel plugin from brandon. 87 * Second, you will have to set the option "mouseWheel" to true. That's it, now you will be able to navigate your carousel 88 * using the mouse wheel. Using buttons and mouseWheel or not mutually exclusive. You can still have buttons for navigation 89 * as well. They complement each other. To use both together, just supply the options required for both as shown below. 90 * @example 91 * $(".carousel").jCarouselLite({ 92 * btnNext: ".next", 93 * btnPrev: ".prev", 94 * mouseWheel: true 95 * }); 96 * 97 * @option auto : number - default is null, meaning autoscroll is disabled by default 98 * @example 99 * $(".carousel").jCarouselLite({ 100 * auto: 800, 101 * speed: 500 102 * }); 103 * @desc You can make your carousel auto-navigate itself by specfying a millisecond value in this option. 104 * The value you specify is the amount of time between 2 slides. The default is null, and that disables auto scrolling. 105 * Specify this value and magically your carousel will start auto scrolling. 106 * 107 * @option speed : number - 200 is default 108 * @example 109 * $(".carousel").jCarouselLite({ 110 * btnNext: ".next", 111 * btnPrev: ".prev",
112 * speed: 800 113 * }); 114 * @desc Specifying a speed will slow-down or speed-up the sliding speed of your carousel. Try it out with 115 * different speeds like 800, 600, 1500 etc. Providing 0, will remove the slide effect. 116 * 117 * @option easing : string - no easing effects by default. 118 * @example 119 * $(".carousel").jCarouselLite({ 120 * btnNext: ".next", 121 * btnPrev: ".prev", 122 * easing: "bounceout" 123 * }); 124 * @desc You can specify any easing effect. Note: You need easing plugin for that. Once specified, 125 * the carousel will slide based on the provided easing effect. 126 * 127 * @option vertical : boolean - default is false 128 * @example 129 * $(".carousel").jCarouselLite({ 130 * btnNext: ".next", 131 * btnPrev: ".prev", 132 * vertical: true 133 * }); 134 * @desc Determines the direction of the carousel. true, means the carousel will display vertically. The next and 135 * prev buttons will slide the items vertically as well. The default is false, which means that the carousel will 136 * display horizontally. The next and prev items will slide the items from left-right in this case. 137 * 138 * @option circular : boolean - default is true 139 * @example 140 * $(".carousel").jCarouselLite({ 141 * btnNext: ".next", 142 * btnPrev: ".prev", 143 * circular: false 144 * }); 145 * @desc Setting it to true enables circular navigation. This means, if you click "next" after you reach the last 146 * element, you will automatically slide to the first element and vice versa. If you set circular to false, then 147 * if you click on the "next" button after you reach the last element, you will stay in the last element itself 148 * and similarly for "previous" button and first element. 149 * 150 * @option visible : number - default is 3 151 * @example 152 * $(".carousel").jCarouselLite({ 153 * btnNext: ".next", 154 * btnPrev: ".prev", 155 * visible: 4 156 * }); 157 * @desc This specifies the number of items visible at all times within the carousel. The default is 3. 158 * You are even free to experiment with real numbers. Eg: "3.5" will have 3 items fully visible and the 159 * last item half visible. This gives you the effect of showing the user that there are more images to the right. 160 * 161 * @option start : number - default is 0 162 * @example 163 * $(".carousel").jCarouselLite({ 164 * btnNext: ".next", 165 * btnPrev: ".prev", 166 * start: 2 167 * }); 168 * @desc You can specify from which item the carousel should start. Remember, the first item in the carousel 169 * has a start of 0, and so on. 170 * 171 * @option scrool : number - default is 1 172 * @example 173 * $(".carousel").jCarouselLite({ 174 * btnNext: ".next", 175 * btnPrev: ".prev", 176 * scroll: 2 177 * }); 178 * @desc The number of items that should scroll/slide when you click the next/prev navigation buttons. By 179 * default, only one item is scrolled, but you may set it to any number. Eg: setting it to "2" will scroll 180 * 2 items when you click the next or previous buttons. 181 *
182 * @option beforeStart, afterEnd : function - callbacks 183 * @example 184 * $(".carousel").jCarouselLite({ 185 * btnNext: ".next", 186 * btnPrev: ".prev", 187 * beforeStart: function(a) { 188 * alert("Before animation starts:" + a); 189 * }, 190 * afterEnd: function(a) { 191 * alert("After animation ends:" + a); 192 * } 193 * }); 194 * @desc If you wanted to do some logic in your page before the slide starts and after the slide ends, you can 195 * register these 2 callbacks. The functions will be passed an argument that represents an array of elements that 196 * are visible at the time of callback. 197 * 198 * 199 * @cat Plugins/Image Gallery 200 * @author Ganeshji Marwaha/[email protected] 201 */ 202 203(function($) { // Compliant with jquery.noConflict() 204$.fn.jCarouselLite = function(o) { 205 o = $.extend({ 206 btnPrev: null, 207 btnNext: null, 208 btnGo: null, 209 mouseWheel: false, 210 auto: null, 211 212 speed: 200, 213 easing: null, 214 215 vertical: false, 216 circular: true, 217 visible: 3, 218 start: 0, 219 scroll: 1, 220 221 beforeStart: null, 222 afterEnd: null 223 }, o || {}); 224 225 return this.each(function() { // Returns the element collection. Chainable. 226 227 var running = false, animCss=o.vertical?"top":"left", sizeCss=o.vertical?"height":"width"; 228 var div = $(this), ul = $("ul", div), tLi = $("li", ul), tl = tLi.size(), v = o.visible; 229 230 if(o.circular) { 231 ul.prepend(tLi.slice(tl-v-1+1).clone()) 232 .append(tLi.slice(0,v).clone()); 233 o.start += v; 234 } 235 tLi.first().addClass("first-item"); 236 tLi.eq(v-1).addClass("last-item"); 237 238 var li = $("li", ul), itemLength = li.size(), curr = o.start; 239 div.css("visibility", "visible"); 240 241 li.css({overflow: "hidden", float: o.vertical ? "none" : "left"}); 242 ul.css({margin: "0", padding: "0", position: "relative", "list-style-type": "none", "z-index": "1"}); 243 div.css({overflow: "hidden", position: "relative", "z-index": "2", left: "0px"}); 244 245 var liSize = o.vertical ? height(li) : width(li); // Full li size(incl margin)-Used for animation 246 var ulSize = liSize * itemLength; // size of full ul(total length, not just for the visible items) 247 var divSize = liSize * v; // size of entire div(total length for just the visible items) 248 249 li.css({width: li.width(), height: li.height()}); 250 ul.css(sizeCss, ulSize+"px").css(animCss, -(curr*liSize)); 251 252 div.css(sizeCss, divSize+"px");
252 // Width of the DIV. length of visible images 253 254 var isNext= false; 255 if(o.btnPrev) 256 $(o.btnPrev).click(function() { 257 isNext=false; 258 return go(curr-o.scroll); 259 }); 260 261 if(o.btnNext) 262 $(o.btnNext).click(function() { 263 isNext=true; 264 return go(curr+o.scroll); 265 }); 266 267 if(o.btnGo) 268 $.each(o.btnGo, function(i, val) { 269 $(val).click(function() { 270 return go(o.circular ? o.visible+i : i); 271 }); 272 }); 273 274 if(o.mouseWheel && div.mousewheel) 275 div.mousewheel(function(e, d) { 276 return d>0 ? go(curr-o.scroll) : go(curr+o.scroll); 277 }); 278 279 if(o.auto) 280 setInterval(function() { 281 go(curr+o.scroll); 282 }, o.auto+o.speed); 283 284 function vis() { 285 return li.slice(curr).slice(0,v); 286 }; 287 288 function go(to) { 289 if(!running) { 290 291 if(o.beforeStart) 292 o.beforeStart.call(this, vis()); 293 294 if (isNext){ 295 ul.find("li.last-item").removeClass("last-item"); 296 }else{ 297 li.eq(curr).removeClass("first-item"); 298 } 299 if(o.circular) { // If circular we are in first or last, then goto the other end 300 if(to<=o.start-v-1) { // If first, then goto last 301 ul.css(animCss, -((itemLength-(v*2))*liSize)+"px"); 302 // If "scroll" > 1, then the "to" might not be equal to the condition; it can be lesser depending on the number of elements. 303 curr = to==o.start-v-1 ? itemLength-(v*2)-1 : itemLength-(v*2)-o.scroll; 304 } else if(to>=itemLength-v+1) { // If last, then goto first 305 ul.css(animCss, -( (v) * liSize ) + "px" ); 306 // If "scroll" > 1, then the "to" might not be equal to the condition; it can be greater depending on the number of elements. 307 curr = to==itemLength-v+1 ? v+1 : v+o.scroll; 308 } else curr = to; 309 } else { // If non-circular and to points to first or last, we just return. 310 if(to<0 || to>itemLength-v) return; 311 else curr = to; 312 } // If neither overrides it, the curr will still be "to" and we can proceed. 313 314 running = true; 315 316 if (isNext){ 317 li.eq(curr+v-1).addClass("last-item"); 318 }else{ 319 li.eq(curr).addClass("first-item"); 320 } 321 322 323 ul.animate( 324 animCss == "left" ? { left: -(curr*liSize) } : { top: -(curr*liSize) } , o.speed, o.easing, 325 function() { 326 if(o.afterEnd) 327 o.afterEnd.call(this, vis()); 328 329 if (isNext){ 330 ul.find("li.first-item").removeClass("first-item"); 331 li.eq(curr).addClass("first-item"); 332 }else{ 333 ul.find("li.last-item").removeClass("last-item"); 334 li.eq(curr+v-1).addClass("last-item"); 335 } 336 337 running = false; 338 } 339 ); 340 341 // Disable buttons when the carousel reaches the last/first, and enable when not 342 if(!o.circular) { 343 $(o.btnPrev + "," + o.btnNext).removeClass("disabled"); 344 $( (curr-o.scroll<0 && o.btnPrev) 345 || 346 (curr+o.scroll > itemLength-v && o.btnNext) 347 || 348 [] 349 ).addClass("disabled"); 350 } 351 352 } 353 return false; 354 }; 355 });
356}; 357 358function css(el, prop) { 359 return parseInt($.css(el[0], prop)) || 0; 360}; 361function width(el) { 362 return el[0].offsetWidth + css(el, 'marginLeft') + css(el, 'marginRight'); 363}; 364function height(el) { 365 return el[0].offsetHeight + css(el, 'marginTop') + css(el, 'marginBottom'); 366}; 367 368})(jQuery);
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