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static/plugins/slimScroll/jquery.slimscroll.js
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/*! Copyright (c) 2011 Piotr Rochala (http://rocha.la) * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses. * * Version: 1.3.3 * */ (function ($) { $.fn.extend({ slimScroll: function (options) { var defaults = { // width in pixels of the visible scroll area width: 'auto', // height in pixels of the visible scroll area height: '250px', // width in pixels of the scrollbar and rail size: '7px', // scrollbar color, accepts any hex/color value color: '#000', // scrollbar position - left/right position: 'right', // distance in pixels between the side edge and the scrollbar distance: '1px', // default scroll position on load - top / bottom / $('selector') start: 'top', // sets scrollbar opacity opacity: .4, // enables always-on mode for the scrollbar alwaysVisible: false, // check if we should hide the scrollbar when user is hovering over disableFadeOut: false, // sets visibility of the rail railVisible: false, // sets rail color railColor: '#333', // sets rail opacity railOpacity: .2, // whether we should use jQuery UI Draggable to enable bar dragging railDraggable: true, // defautlt CSS class of the slimscroll rail railClass: 'slimScrollRail', // defautlt CSS class of the slimscroll bar barClass: 'slimScrollBar', // defautlt CSS class of the slimscroll wrapper wrapperClass: 'slimScrollDiv', // check if mousewheel should scroll the window if we reach top/bottom allowPageScroll: false, // scroll amount applied to each mouse wheel step wheelStep: 20, // scroll amount applied when user is using gestures touchScrollStep: 200, // sets border radius borderRadius: '7px', // sets border radius of the rail railBorderRadius: '7px' }; var o = $.extend(defaults, options); // do it for every element that matches selector this.each(function () { var isOverPanel, isOverBar, isDragg, queueHide, touchDif, barHeight, percentScroll, lastScroll, divS = '<div></div>', minBarHeight = 30, releaseScroll = false; // used in event handlers and for better minification var me = $(this); // ensure we are not binding it again if (me.parent().hasClass(o.wrapperClass)) { // start from last bar position var offset = me.scrollTop(); // find bar and rail bar = me.parent().find('.' + o.barClass); rail = me.parent().find('.' + o.railClass); getBarHeight(); // check if we should scroll existing instance if ($.isPlainObject(options)) { // Pass height: auto to an existing slimscroll object to force a resize after contents have changed if ('height' in options && options.height == 'auto') { me.parent().css('height', 'auto'); me.css('height', 'auto'); var height = me.parent().parent().height(); me.parent().css('height', height); me.css('height', height); } if ('scrollTo' in options) { // jump to a static point offset = parseInt(o.scrollTo); } else if ('scrollBy' in options) { // jump by value pixels offset += parseInt(o.scrollBy); } else if ('destroy' in options) { // remove slimscroll elements bar.remove(); rail.remove(); me.unwrap(); return; } // scroll content by the given offset scrollContent(offset, false, true); } return; } else if ($.isPlainObject(options)) { if ('destroy' in options) { return; } } // optionally set height to the parent's height o.height = (o.height == 'auto') ? me.parent().height() : o.height; // wrap content var wrapper = $(divS) .addClass(o.wrapperClass) .css({ position: 'relative', overflow: 'hidden', width: o.width, height: o.height }); // update style for the div me.css({ overflow: 'hidden', width: o.width, height: o.height, //Fix for IE10 "-ms-touch-action": "none" }); // create scrollbar rail var rail = $(divS) .addClass(o.railClass) .css({ width: o.size, height: '100%', position: 'absolute', top: 0, display: (o.alwaysVisible && o.railVisible) ? 'block' : 'none', 'border-radius': o.railBorderRadius, background: o.railColor, opacity: o.railOpacity, zIndex: 90 }); // create scrollbar var bar = $(divS) .addClass(o.barClass) .css({ background: o.color, width: o.size, position: 'absolute', top: 0, opacity: o.opacity, display: o.alwaysVisible ? 'block' : 'none', 'border-radius': o.borderRadius, BorderRadius: o.borderRadius, MozBorderRadius: o.borderRadius, WebkitBorderRadius: o.borderRadius, zIndex: 99 }); // set position var posCss = (o.position == 'right') ? {right: o.distance} : {left: o.distance}; rail.css(posCss); bar.css(posCss); // wrap it me.wrap(wrapper); // append to parent div me.parent().append(bar); me.parent().append(rail); // make it draggable and no longer dependent on the jqueryUI if (o.railDraggable) { bar.bind("mousedown", function (e) { var $doc = $(document); isDragg = true; t = parseFloat(bar.css('top')); pageY = e.pageY; $doc.bind("mousemove.slimscroll", function (e) { currTop = t + e.pageY - pageY; bar.css('top', currTop); scrollContent(0, bar.position().top, false);// scroll content }); $doc.bind("mouseup.slimscroll", function (e) { isDragg = false; hideBar(); $doc.unbind('.slimscroll'); }); return false; }).bind("selectstart.slimscroll", function (e) { e.stopPropagation(); e.preventDefault(); return false; }); } // on rail over rail.hover(function () { showBar(); }, function () { hideBar(); }); // on bar over bar.hover(function () { isOverBar = true; }, function () { isOverBar = false; }); // show on parent mouseover me.hover(function () { isOverPanel = true; showBar(); hideBar(); }, function () { isOverPanel = false; hideBar(); }); if (window.navigator.msPointerEnabled) { // support for mobile me.bind('MSPointerDown', function (e, b) { if (e.originalEvent.targetTouches.length) { // record where touch started touchDif = e.originalEvent.targetTouches[0].pageY; } }); me.bind('MSPointerMove', function (e) { // prevent scrolling the page if necessary e.originalEvent.preventDefault(); if (e.originalEvent.targetTouches.length) { // see how far user swiped var diff = (touchDif - e.originalEvent.targetTouches[0].pageY) / o.touchScrollStep; // scroll content scrollContent(diff, true); touchDif = e.originalEvent.targetTouches[0].pageY; } }); } else { // support for mobile me.bind('touchstart', function (e, b) { if (e.originalEvent.touches.length) { // record where touch started touchDif = e.originalEvent.touches[0].pageY; } }); me.bind('touchmove', function (e) { // prevent scrolling the page if necessary if (!releaseScroll) { e.originalEvent.preventDefault(); } if (e.originalEvent.touches.length) { // see how far user swiped var diff = (touchDif - e.originalEvent.touches[0].pageY) / o.touchScrollStep; // scroll content scrollContent(diff, true); touchDif = e.originalEvent.touches[0].pageY; } }); } // set up initial height getBarHeight(); // check start position if (o.start === 'bottom') { // scroll content to bottom bar.css({top: me.outerHeight() - bar.outerHeight()}); scrollContent(0, true); } else if (o.start !== 'top') { // assume jQuery selector scrollContent($(o.start).position().top, null, true); // make sure bar stays hidden if (!o.alwaysVisible) { bar.hide(); } } // attach scroll events attachWheel(); function _onWheel(e) { // use mouse wheel only when mouse is over if (!isOverPanel) { return; } var e = e || window.event; var delta = 0; if (e.wheelDelta) { delta = -e.wheelDelta / 120; } if (e.detail) { delta = e.detail / 3; } var target = e.target || e.srcTarget || e.srcElement; if ($(target).closest('.' + o.wrapperClass).is(me.parent())) { // scroll content scrollContent(delta, true); } // stop window scroll if (e.preventDefault && !releaseScroll) { e.preventDefault(); } if (!releaseScroll) { e.returnValue = false; } } function scrollContent(y, isWheel, isJump) { releaseScroll = false; var delta = y; var maxTop = me.outerHeight() - bar.outerHeight(); if (isWheel) { // move bar with mouse wheel delta = parseInt(bar.css('top')) + y * parseInt(o.wheelStep) / 100 * bar.outerHeight(); // move bar, make sure it doesn't go out delta = Math.min(Math.max(delta, 0), maxTop); // if scrolling down, make sure a fractional change to the // scroll position isn't rounded away when the scrollbar's CSS is set // this flooring of delta would happened automatically when // bar.css is set below, but we floor here for clarity delta = (y > 0) ? Math.ceil(delta) : Math.floor(delta); // scroll the scrollbar bar.css({top: delta + 'px'}); } // calculate actual scroll amount percentScroll = parseInt(bar.css('top')) / (me.outerHeight() - bar.outerHeight()); delta = percentScroll * (me[0].scrollHeight - me.outerHeight()); if (isJump) { delta = y; var offsetTop = delta / me[0].scrollHeight * me.outerHeight(); offsetTop = Math.min(Math.max(offsetTop, 0), maxTop); bar.css({top: offsetTop + 'px'}); } // scroll content me.scrollTop(delta); // fire scrolling event me.trigger('slimscrolling', ~~delta); // ensure bar is visible showBar(); // trigger hide when scroll is stopped hideBar(); } function attachWheel() { if (window.addEventListener) { this.addEventListener('DOMMouseScroll', _onWheel, false); this.addEventListener('mousewheel', _onWheel, false); } else { document.attachEvent("onmousewheel", _onWheel) } } function getBarHeight() { // calculate scrollbar height and make sure it is not too small barHeight = Math.max((me.outerHeight() / me[0].scrollHeight) * me.outerHeight(), minBarHeight); bar.css({height: barHeight + 'px'}); // hide scrollbar if content is not long enough var display = barHeight == me.outerHeight() ? 'none' : 'block'; bar.css({display: display}); } function showBar() { // recalculate bar height getBarHeight(); clearTimeout(queueHide); // when bar reached top or bottom if (percentScroll == ~~percentScroll) { //release wheel releaseScroll = o.allowPageScroll; // publish approporiate event if (lastScroll != percentScroll) { var msg = (~~percentScroll == 0) ? 'top' : 'bottom'; me.trigger('slimscroll', msg); } } else { releaseScroll = false; } lastScroll = percentScroll; // show only when required if (barHeight >= me.outerHeight()) { //allow window scroll releaseScroll = true; return; } bar.stop(true, true).fadeIn('fast'); if (o.railVisible) { rail.stop(true, true).fadeIn('fast'); } } function hideBar() { // only hide when options allow it if (!o.alwaysVisible) { queueHide = setTimeout(function () { if (!(o.disableFadeOut && isOverPanel) && !isOverBar && !isDragg) { bar.fadeOut('slow'); rail.fadeOut('slow'); } }, 1000); } } }); // maintain chainability return this; } }); $.fn.extend({ slimscroll: $.fn.slimScroll }); })(jQuery); |