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| 58d006 | 1 | /*! Copyright (c) 2011 Piotr Rochala (http://rocha.la) |
| A | 2 | * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) |
| 3 | * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses. | |
| 4 | * | |
| 5 | * Version: 1.3.1 | |
| 6 | * | |
| 7 | */ | |
| 8 | (function($) { | |
| 9 | ||
| 10 | jQuery.fn.extend({ | |
| 11 | slimScroll: function(options) { | |
| 12 | ||
| 13 | var defaults = { | |
| 14 | ||
| 15 | // width in pixels of the visible scroll area | |
| 16 | width : 'auto', | |
| 17 | ||
| 18 | // height in pixels of the visible scroll area | |
| 19 | height : '250px', | |
| 20 | ||
| 21 | // width in pixels of the scrollbar and rail | |
| 22 | size : '7px', | |
| 23 | ||
| 24 | // scrollbar color, accepts any hex/color value | |
| 25 | color: '#000', | |
| 26 | ||
| 27 | // scrollbar position - left/right | |
| 28 | position : 'right', | |
| 29 | ||
| 30 | // distance in pixels between the side edge and the scrollbar | |
| 31 | distance : '1px', | |
| 32 | ||
| 33 | // default scroll position on load - top / bottom / $('selector') | |
| 34 | start : 'top', | |
| 35 | ||
| 36 | // sets scrollbar opacity | |
| 37 | opacity : .4, | |
| 38 | ||
| 39 | // enables always-on mode for the scrollbar | |
| 40 | alwaysVisible : false, | |
| 41 | ||
| 42 | // check if we should hide the scrollbar when user is hovering over | |
| 43 | disableFadeOut : false, | |
| 44 | ||
| 45 | // sets visibility of the rail | |
| 46 | railVisible : false, | |
| 47 | ||
| 48 | // sets rail color | |
| 49 | railColor : '#333', | |
| 50 | ||
| 51 | // sets rail opacity | |
| 52 | railOpacity : .2, | |
| 53 | ||
| 54 | // whether we should use jQuery UI Draggable to enable bar dragging | |
| 55 | railDraggable : true, | |
| 56 | ||
| 57 | // defautlt CSS class of the slimscroll rail | |
| 58 | railClass : 'slimScrollRail', | |
| 59 | ||
| 60 | // defautlt CSS class of the slimscroll bar | |
| 61 | barClass : 'slimScrollBar', | |
| 62 | ||
| 63 | // defautlt CSS class of the slimscroll wrapper | |
| 64 | wrapperClass : 'slimScrollDiv', | |
| 65 | ||
| 66 | // check if mousewheel should scroll the window if we reach top/bottom | |
| 67 | allowPageScroll : false, | |
| 68 | ||
| 69 | // scroll amount applied to each mouse wheel step | |
| 70 | wheelStep : 20, | |
| 71 | ||
| 72 | // scroll amount applied when user is using gestures | |
| 73 | touchScrollStep : 200, | |
| 74 | ||
| 75 | // sets border radius | |
| 76 | borderRadius: '7px', | |
| 77 | ||
| 78 | // sets border radius of the rail | |
| 79 | railBorderRadius : '7px' | |
| 80 | }; | |
| 81 | ||
| 82 | var o = $.extend(defaults, options); | |
| 83 | ||
| 84 | // do it for every element that matches selector | |
| 85 | this.each(function(){ | |
| 86 | ||
| 87 | var isOverPanel, isOverBar, isDragg, queueHide, touchDif, | |
| 88 | barHeight, percentScroll, lastScroll, | |
| 89 | divS = '<div></div>', | |
| 90 | minBarHeight = 30, | |
| 91 | releaseScroll = false; | |
| 92 | ||
| 93 | // used in event handlers and for better minification | |
| 94 | var me = $(this); | |
| 95 | ||
| 96 | // ensure we are not binding it again | |
| 97 | if (me.parent().hasClass(o.wrapperClass)) | |
| 98 | { | |
| 99 | // start from last bar position | |
| 100 | var offset = me.scrollTop(); | |
| 101 | ||
| 102 | // find bar and rail | |
| 103 | bar = me.parent().find('.' + o.barClass); | |
| 104 | rail = me.parent().find('.' + o.railClass); | |
| 105 | ||
| 106 | getBarHeight(); | |
| 107 | ||
| 108 | // check if we should scroll existing instance | |
| 109 | if ($.isPlainObject(options)) | |
| 110 | { | |
| 111 | // Pass height: auto to an existing slimscroll object to force a resize after contents have changed | |
| 112 | if ( 'height' in options && options.height == 'auto' ) { | |
| 113 | me.parent().css('height', 'auto'); | |
| 114 | me.css('height', 'auto'); | |
| 115 | var height = me.parent().parent().height(); | |
| 116 | me.parent().css('height', height); | |
| 117 | me.css('height', height); | |
| 118 | } | |
| 119 | ||
| 120 | if ('scrollTo' in options) | |
| 121 | { | |
| 122 | // jump to a static point | |
| 123 | offset = parseInt(o.scrollTo); | |
| 124 | } | |
| 125 | else if ('scrollBy' in options) | |
| 126 | { | |
| 127 | // jump by value pixels | |
| 128 | offset += parseInt(o.scrollBy); | |
| 129 | } | |
| 130 | else if ('destroy' in options) | |
| 131 | { | |
| 132 | // remove slimscroll elements | |
| 133 | bar.remove(); | |
| 134 | rail.remove(); | |
| 135 | me.unwrap(); | |
| 136 | return; | |
| 137 | } | |
| 138 | ||
| 139 | // scroll content by the given offset | |
| 140 | scrollContent(offset, false, true); | |
| 141 | } | |
| 142 | ||
| 143 | return; | |
| 144 | } | |
| 145 | ||
| 146 | // optionally set height to the parent's height | |
| 147 | o.height = (o.height == 'auto') ? me.parent().height() : o.height; | |
| 148 | ||
| 149 | // wrap content | |
| 150 | var wrapper = $(divS) | |
| 151 | .addClass(o.wrapperClass) | |
| 152 | .css({ | |
| 153 | position: 'relative', | |
| 154 | overflow: 'hidden', | |
| 155 | width: o.width, | |
| 156 | height: o.height | |
| 157 | }); | |
| 158 | ||
| 159 | // update style for the div | |
| 160 | me.css({ | |
| 161 | overflow: 'hidden', | |
| 162 | width: o.width, | |
| 163 | height: o.height | |
| 164 | }); | |
| 165 | ||
| 166 | // create scrollbar rail | |
| 167 | var rail = $(divS) | |
| 168 | .addClass(o.railClass) | |
| 169 | .css({ | |
| 170 | width: o.size, | |
| 171 | height: '100%', | |
| 172 | position: 'absolute', | |
| 173 | top: 0, | |
| 174 | display: (o.alwaysVisible && o.railVisible) ? 'block' : 'none', | |
| 175 | 'border-radius': o.railBorderRadius, | |
| 176 | background: o.railColor, | |
| 177 | opacity: o.railOpacity, | |
| 178 | zIndex: 90 | |
| 179 | }); | |
| 180 | ||
| 181 | // create scrollbar | |
| 182 | var bar = $(divS) | |
| 183 | .addClass(o.barClass) | |
| 184 | .css({ | |
| 185 | background: o.color, | |
| 186 | width: o.size, | |
| 187 | position: 'absolute', | |
| 188 | top: 0, | |
| 189 | opacity: o.opacity, | |
| 190 | display: o.alwaysVisible ? 'block' : 'none', | |
| 191 | 'border-radius' : o.borderRadius, | |
| 192 | BorderRadius: o.borderRadius, | |
| 193 | MozBorderRadius: o.borderRadius, | |
| 194 | WebkitBorderRadius: o.borderRadius, | |
| 195 | zIndex: 99 | |
| 196 | }); | |
| 197 | ||
| 198 | // set position | |
| 199 | var posCss = (o.position == 'right') ? { right: o.distance } : { left: o.distance }; | |
| 200 | rail.css(posCss); | |
| 201 | bar.css(posCss); | |
| 202 | ||
| 203 | // wrap it | |
| 204 | me.wrap(wrapper); | |
| 205 | ||
| 206 | // append to parent div | |
| 207 | me.parent().append(bar); | |
| 208 | me.parent().append(rail); | |
| 209 | ||
| 210 | // make it draggable and no longer dependent on the jqueryUI | |
| 211 | if (o.railDraggable){ | |
| 212 | bar.bind("mousedown", function(e) { | |
| 213 | var $doc = $(document); | |
| 214 | isDragg = true; | |
| 215 | t = parseFloat(bar.css('top')); | |
| 216 | pageY = e.pageY; | |
| 217 | ||
| 218 | $doc.bind("mousemove.slimscroll", function(e){ | |
| 219 | currTop = t + e.pageY - pageY; | |
| 220 | bar.css('top', currTop); | |
| 221 | scrollContent(0, bar.position().top, false);// scroll content | |
| 222 | }); | |
| 223 | ||
| 224 | $doc.bind("mouseup.slimscroll", function(e) { | |
| 225 | isDragg = false;hideBar(); | |
| 226 | $doc.unbind('.slimscroll'); | |
| 227 | }); | |
| 228 | return false; | |
| 229 | }).bind("selectstart.slimscroll", function(e){ | |
| 230 | e.stopPropagation(); | |
| 231 | e.preventDefault(); | |
| 232 | return false; | |
| 233 | }); | |
| 234 | } | |
| 235 | ||
| 236 | // on rail over | |
| 237 | rail.hover(function(){ | |
| 238 | showBar(); | |
| 239 | }, function(){ | |
| 240 | hideBar(); | |
| 241 | }); | |
| 242 | ||
| 243 | // on bar over | |
| 244 | bar.hover(function(){ | |
| 245 | isOverBar = true; | |
| 246 | }, function(){ | |
| 247 | isOverBar = false; | |
| 248 | }); | |
| 249 | ||
| 250 | // show on parent mouseover | |
| 251 | me.hover(function(){ | |
| 252 | isOverPanel = true; | |
| 253 | showBar(); | |
| 254 | hideBar(); | |
| 255 | }, function(){ | |
| 256 | isOverPanel = false; | |
| 257 | hideBar(); | |
| 258 | }); | |
| 259 | ||
| 260 | // support for mobile | |
| 261 | me.bind('touchstart', function(e,b){ | |
| 262 | if (e.originalEvent.touches.length) | |
| 263 | { | |
| 264 | // record where touch started | |
| 265 | touchDif = e.originalEvent.touches[0].pageY; | |
| 266 | } | |
| 267 | }); | |
| 268 | ||
| 269 | me.bind('touchmove', function(e){ | |
| 270 | // prevent scrolling the page if necessary | |
| 271 | if(!releaseScroll) | |
| 272 | { | |
| 273 | e.originalEvent.preventDefault(); | |
| 274 | } | |
| 275 | if (e.originalEvent.touches.length) | |
| 276 | { | |
| 277 | // see how far user swiped | |
| 278 | var diff = (touchDif - e.originalEvent.touches[0].pageY) / o.touchScrollStep; | |
| 279 | // scroll content | |
| 280 | scrollContent(diff, true); | |
| 281 | touchDif = e.originalEvent.touches[0].pageY; | |
| 282 | } | |
| 283 | }); | |
| 284 | ||
| 285 | // set up initial height | |
| 286 | getBarHeight(); | |
| 287 | ||
| 288 | // check start position | |
| 289 | if (o.start === 'bottom') | |
| 290 | { | |
| 291 | // scroll content to bottom | |
| 292 | bar.css({ top: me.outerHeight() - bar.outerHeight() }); | |
| 293 | scrollContent(0, true); | |
| 294 | } | |
| 295 | else if (o.start !== 'top') | |
| 296 | { | |
| 297 | // assume jQuery selector | |
| 298 | scrollContent($(o.start).position().top, null, true); | |
| 299 | ||
| 300 | // make sure bar stays hidden | |
| 301 | if (!o.alwaysVisible) { bar.hide(); } | |
| 302 | } | |
| 303 | ||
| 304 | // attach scroll events | |
| 305 | attachWheel(); | |
| 306 | ||
| 307 | function _onWheel(e) | |
| 308 | { | |
| 309 | // use mouse wheel only when mouse is over | |
| 310 | if (!isOverPanel) { return; } | |
| 311 | ||
| 312 | var e = e || window.event; | |
| 313 | ||
| 314 | var delta = 0; | |
| 315 | if (e.wheelDelta) { delta = -e.wheelDelta/120; } | |
| 316 | if (e.detail) { delta = e.detail / 3; } | |
| 317 | ||
| 318 | var target = e.target || e.srcTarget || e.srcElement; | |
| 319 | if ($(target).closest('.' + o.wrapperClass).is(me.parent())) { | |
| 320 | // scroll content | |
| 321 | scrollContent(delta, true); | |
| 322 | } | |
| 323 | ||
| 324 | // stop window scroll | |
| 325 | if (e.preventDefault && !releaseScroll) { e.preventDefault(); } | |
| 326 | if (!releaseScroll) { e.returnValue = false; } | |
| 327 | } | |
| 328 | ||
| 329 | function scrollContent(y, isWheel, isJump) | |
| 330 | { | |
| 331 | releaseScroll = false; | |
| 332 | var delta = y; | |
| 333 | var maxTop = me.outerHeight() - bar.outerHeight(); | |
| 334 | ||
| 335 | if (isWheel) | |
| 336 | { | |
| 337 | // move bar with mouse wheel | |
| 338 | delta = parseInt(bar.css('top')) + y * parseInt(o.wheelStep) / 100 * bar.outerHeight(); | |
| 339 | ||
| 340 | // move bar, make sure it doesn't go out | |
| 341 | delta = Math.min(Math.max(delta, 0), maxTop); | |
| 342 | ||
| 343 | // if scrolling down, make sure a fractional change to the | |
| 344 | // scroll position isn't rounded away when the scrollbar's CSS is set | |
| 345 | // this flooring of delta would happened automatically when | |
| 346 | // bar.css is set below, but we floor here for clarity | |
| 347 | delta = (y > 0) ? Math.ceil(delta) : Math.floor(delta); | |
| 348 | ||
| 349 | // scroll the scrollbar | |
| 350 | bar.css({ top: delta + 'px' }); | |
| 351 | } | |
| 352 | ||
| 353 | // calculate actual scroll amount | |
| 354 | percentScroll = parseInt(bar.css('top')) / (me.outerHeight() - bar.outerHeight()); | |
| 355 | delta = percentScroll * (me[0].scrollHeight - me.outerHeight()); | |
| 356 | ||
| 357 | if (isJump) | |
| 358 | { | |
| 359 | delta = y; | |
| 360 | var offsetTop = delta / me[0].scrollHeight * me.outerHeight(); | |
| 361 | offsetTop = Math.min(Math.max(offsetTop, 0), maxTop); | |
| 362 | bar.css({ top: offsetTop + 'px' }); | |
| 363 | } | |
| 364 | ||
| 365 | // scroll content | |
| 366 | me.scrollTop(delta); | |
| 367 | ||
| 368 | // fire scrolling event | |
| 369 | me.trigger('slimscrolling', ~~delta); | |
| 370 | ||
| 371 | // ensure bar is visible | |
| 372 | showBar(); | |
| 373 | ||
| 374 | // trigger hide when scroll is stopped | |
| 375 | hideBar(); | |
| 376 | } | |
| 377 | ||
| 378 | function attachWheel() | |
| 379 | { | |
| 380 | if (window.addEventListener) | |
| 381 | { | |
| 382 | this.addEventListener('DOMMouseScroll', _onWheel, false ); | |
| 383 | this.addEventListener('mousewheel', _onWheel, false ); | |
| 384 | this.addEventListener('MozMousePixelScroll', _onWheel, false ); | |
| 385 | } | |
| 386 | else | |
| 387 | { | |
| 388 | document.attachEvent("onmousewheel", _onWheel) | |
| 389 | } | |
| 390 | } | |
| 391 | ||
| 392 | function getBarHeight() | |
| 393 | { | |
| 394 | // calculate scrollbar height and make sure it is not too small | |
| 395 | barHeight = Math.max((me.outerHeight() / me[0].scrollHeight) * me.outerHeight(), minBarHeight); | |
| 396 | bar.css({ height: barHeight + 'px' }); | |
| 397 | ||
| 398 | // hide scrollbar if content is not long enough | |
| 399 | var display = barHeight == me.outerHeight() ? 'none' : 'block'; | |
| 400 | bar.css({ display: display }); | |
| 401 | } | |
| 402 | ||
| 403 | function showBar() | |
| 404 | { | |
| 405 | // recalculate bar height | |
| 406 | getBarHeight(); | |
| 407 | clearTimeout(queueHide); | |
| 408 | ||
| 409 | // when bar reached top or bottom | |
| 410 | if (percentScroll == ~~percentScroll) | |
| 411 | { | |
| 412 | //release wheel | |
| 413 | releaseScroll = o.allowPageScroll; | |
| 414 | ||
| 415 | // publish approporiate event | |
| 416 | if (lastScroll != percentScroll) | |
| 417 | { | |
| 418 | var msg = (~~percentScroll == 0) ? 'top' : 'bottom'; | |
| 419 | me.trigger('slimscroll', msg); | |
| 420 | } | |
| 421 | } | |
| 422 | else | |
| 423 | { | |
| 424 | releaseScroll = false; | |
| 425 | } | |
| 426 | lastScroll = percentScroll; | |
| 427 | ||
| 428 | // show only when required | |
| 429 | if(barHeight >= me.outerHeight()) { | |
| 430 | //allow window scroll | |
| 431 | releaseScroll = true; | |
| 432 | return; | |
| 433 | } | |
| 434 | bar.stop(true,true).fadeIn('fast'); | |
| 435 | if (o.railVisible) { rail.stop(true,true).fadeIn('fast'); } | |
| 436 | } | |
| 437 | ||
| 438 | function hideBar() | |
| 439 | { | |
| 440 | // only hide when options allow it | |
| 441 | if (!o.alwaysVisible) | |
| 442 | { | |
| 443 | queueHide = setTimeout(function(){ | |
| 444 | if (!(o.disableFadeOut && isOverPanel) && !isOverBar && !isDragg) | |
| 445 | { | |
| 446 | bar.fadeOut('slow'); | |
| 447 | rail.fadeOut('slow'); | |
| 448 | } | |
| 449 | }, 1000); | |
| 450 | } | |
| 451 | } | |
| 452 | ||
| 453 | }); | |
| 454 | ||
| 455 | // maintain chainability | |
| 456 | return this; | |
| 457 | } | |
| 458 | }); | |
| 459 | ||
| 460 | jQuery.fn.extend({ | |
| 461 | slimscroll: jQuery.fn.slimScroll | |
| 462 | }); | |
| 463 | ||
| 464 | })(jQuery); | |
