475 lines
14 KiB
JavaScript
475 lines
14 KiB
JavaScript
/*! 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: 1.3.8
|
|
*
|
|
*/
|
|
(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 : '100%',
|
|
|
|
// 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 = $(this);
|
|
|
|
// ensure we are not binding it again
|
|
if (me.parent().hasClass(o.wrapperClass))
|
|
{
|
|
// start from last bar position
|
|
var offset = me.scrollTop();
|
|
|
|
// find bar and rail
|
|
bar = me.siblings('.' + o.barClass);
|
|
rail = me.siblings('.' + o.railClass);
|
|
|
|
getBarHeight();
|
|
|
|
// check if we should scroll existing instance
|
|
if ($.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);
|
|
} else if ('height' in options) {
|
|
var h = options.height;
|
|
me.parent().css('height', h);
|
|
me.css('height', h);
|
|
}
|
|
|
|
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
|
|
});
|
|
|
|
// 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();
|
|
$doc.unbind('.slimscroll');
|
|
});
|
|
return false;
|
|
}).bind("selectstart.slimscroll", function(e){
|
|
e.stopPropagation();
|
|
e.preventDefault();
|
|
return false;
|
|
});
|
|
}
|
|
|
|
// on rail over
|
|
rail.hover(function(){
|
|
showBar();
|
|
}, function(){
|
|
hideBar();
|
|
});
|
|
|
|
// on bar over
|
|
bar.hover(function(){
|
|
isOverBar = true;
|
|
}, function(){
|
|
isOverBar = false;
|
|
});
|
|
|
|
// show on parent mouseover
|
|
me.hover(function(){
|
|
isOverPanel = true;
|
|
showBar();
|
|
hideBar();
|
|
}, function(){
|
|
isOverPanel = false;
|
|
hideBar();
|
|
});
|
|
|
|
// support for mobile
|
|
me.bind('touchstart', function(e,b){
|
|
if (e.originalEvent.touches.length)
|
|
{
|
|
// record where touch started
|
|
touchDif = e.originalEvent.touches[0].pageY;
|
|
}
|
|
});
|
|
|
|
me.bind('touchmove', function(e){
|
|
// prevent scrolling the page if necessary
|
|
if(!releaseScroll)
|
|
{
|
|
e.originalEvent.preventDefault();
|
|
}
|
|
if (e.originalEvent.touches.length)
|
|
{
|
|
// see how far user swiped
|
|
var diff = (touchDif - e.originalEvent.touches[0].pageY) / o.touchScrollStep;
|
|
// scroll content
|
|
scrollContent(diff, true);
|
|
touchDif = e.originalEvent.touches[0].pageY;
|
|
}
|
|
});
|
|
|
|
// set up initial height
|
|
getBarHeight();
|
|
|
|
// check start position
|
|
if (o.start === 'bottom')
|
|
{
|
|
// scroll content to bottom
|
|
bar.css({ top: me.outerHeight() - bar.outerHeight() });
|
|
scrollContent(0, true);
|
|
}
|
|
else if (o.start !== 'top')
|
|
{
|
|
// assume jQuery selector
|
|
scrollContent($(o.start).position().top, null, true);
|
|
|
|
// make sure bar stays hidden
|
|
if (!o.alwaysVisible) { bar.hide(); }
|
|
}
|
|
|
|
// attach scroll events
|
|
attachWheel(this);
|
|
|
|
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(target)
|
|
{
|
|
if (window.addEventListener)
|
|
{
|
|
target.addEventListener('DOMMouseScroll', _onWheel, false );
|
|
target.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);
|