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jquery.scrollbar.js
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/
jquery.scrollbar.js
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/*
* jQuery switchButton
*
* Copyright 2011, L.STEVENIN
* Released under the MIT license.
*
* Depends:
* jquery.ui.widget.js
*/
(function($, scrollbar){
$.widget('scrollbar.scrollbar', {
options: {
classes: '', // Extra classes for css styling
wheel: 40, // Scroll offset on mousewheel
scroll: true, // Allow / disallow mouse scrolling
overlay: true, // Scrollbars are overlaid
autohide: true, // Scrollbars are automatically hidden
animate: { // Scroll wheel animation - set to false to disable
duration: 300,
easing: 'swing'
}
},
_create: function() {
this.settings = {
viewport: {},
overview: {},
scrollbarX: {
thumb: {},
track: {}
},
scrollbarY: {
thumb: {},
track: {}
},
move: {
axis: null,
mouse: {},
position: {}
}
}
this._wrapInContainer();
this.refresh();
this._attachEvents();
},
/* Wrap element in container - creates elements */
_wrapInContainer: function() {
this._id = $[scrollbar].count++;
this._overflowX = this.element.css("overflow-x");
this._overflowY = this.element.css("overflow-y");
this._scrollX = this._overflowX in { auto:1, scroll:1 } ? true : false;
this._scrollY = this._overflowY in { auto:1, scroll:1 } ? true : false;
this._outerHeight = this.element.outerHeight();
this._outerWidth = this.element.outerWidth();
this.$overview = this.element.addClass("ui-scrollbar-overview");
this.$container = $("<div class='ui-scrollbar ui-scrollbar-default "+this.options.classes+"' id='scrollbar-"+this._id+"' />").toggleClass("ui-scrollbar-overlay", this.options.overlay);
this.$viewport = $("<div class='ui-scrollbar-viewport' />");
this.$scrollbarX = $("<div class='ui-scrollbar-scrollbarX'><div class='ui-scrollbar-track'><div class='ui-scrollbar-thumb'></div></div></div>");
this.$scrollbarY = $("<div class='ui-scrollbar-scrollbarY'><div class='ui-scrollbar-track'><div class='ui-scrollbar-thumb'></div></div></div>");
this.$overview.after(this.$container);
this.$overview.remove();
this.$container.append(this.$viewport);
this.$viewport.append(this.$overview);
if(this._scrollY) { this.$container.append(this.$scrollbarY); }
if(this._scrollX) { this.$container.append(this.$scrollbarX); }
this._trackXWidth = this.$scrollbarX.find(".ui-scrollbar-track").width();
this._trackYHeight = this.$scrollbarY.find(".ui-scrollbar-track").height();
this._thumbXWidth = this.$scrollbarX.find(".ui-scrollbar-thumb").width();
this._thumbYHeight = this.$scrollbarY.find(".ui-scrollbar-thumb").height();
},
_setSize: function() {
if(this._scrollY) {
this.$overview.css("top", -this.settings.scrollbarY.pos);
this.$scrollbarY.css("height", this.settings.scrollbarY.track.height);
this.$scrollbarY.find(".ui-scrollbar-track").css("height", this.settings.scrollbarY.track.height);
this.$scrollbarY.find(".ui-scrollbar-thumb").css({
"top": this.settings.scrollbarY.pos / this.settings.scrollbarY.ratio,
"height": this.settings.scrollbarY.thumb.height
});
}
if(this._scrollX) {
this.$overview.css("left", -this.settings.scrollbarX.pos);
this.$scrollbarX.css("width", this.settings.scrollbarX.track.width);
this.$scrollbarX.find(".ui-scrollbar-track").css("width", this.settings.scrollbarX.track.width);
this.$scrollbarX.find(".ui-scrollbar-thumb").css({
"left": this.settings.scrollbarX.pos / this.settings.scrollbarX.ratio,
"width": this.settings.scrollbarX.thumb.width
});
}
},
_attachEvents: function() {
if(this._scrollY) {
this.$scrollbarY.find(".ui-scrollbar-thumb").bind("mousedown", { axis: "y", obj: this }, this._onStart);
this.$scrollbarY.find(".ui-scrollbar-track").bind("mouseup", { axis: "y", obj: this }, this._onDrag);
if(this.options.scroll) {
this.$container.bind("DOMMouseScroll mousewheel", { axis: "y", obj: this }, this._onWheel);
}
}
if(this._scrollX) {
this.$scrollbarX.find(".ui-scrollbar-thumb").bind("mousedown", { axis: "x", obj: this }, this._onStart);
this.$scrollbarX.find(".ui-scrollbar-track").bind("mouseup", { axis: "x", obj: this }, this._onDrag);
if(this.options.scroll) {
this.$container.bind("DOMMouseScroll mousewheel", { axis: "x", obj: this }, this._onWheel);
}
}
},
_onStart: function(event) {
var obj = event.data.obj;
obj.settings.move.axis = event.data.axis;
if(obj.settings.move.axis == "y") {
obj.settings.move.mouse.start = event.pageY;
var thumbTop = parseInt(obj.$scrollbarY.find(".ui-scrollbar-thumb").css("top"));
obj.settings.move.position.start = thumbTop == "auto" ? 0 : thumbTop;
$(document).bind("mousemove touchmove", { axis: "y", obj: obj }, obj._onDrag);
$(document).bind("mouseup touchend", { axis: "y", obj: obj }, obj._onEnd);
obj.$scrollbarY.find(".ui-scrollbar-thumb").bind("mouseup touchend", { axis: "y", obj: obj }, obj._onEnd);
}
if(obj.settings.move.axis == "x") {
obj.settings.move.mouse.start = event.pageX;
var thumbLeft = parseInt(obj.$scrollbarX.find(".ui-scrollbar-thumb").css("left"));
obj.settings.move.position.start = thumbLeft == "auto" ? 0 : thumbLeft;
$(document).bind("mousemove touchmove", { axis: "x", obj: obj }, obj._onDrag);
$(document).bind("mouseup touchend", { axis: "x", obj: obj }, obj._onEnd);
obj.$scrollbarX.find(".ui-scrollbar-thumb").bind("mouseup touchend", { axis: "x", obj: obj }, obj._onEnd);
}
return false;
},
_onEnd: function(event) {
var obj = event.data.obj;
if(obj.settings.move.axis == "y") {
$(document).unbind('mousemove touchmove', obj._onDrag);
$(document).unbind('mouseup touchend', obj._onEnd);
obj.$scrollbarY.find(".ui-scrollbar-thumb").unbind('mouseup touchend', obj._onEnd);
}
if(obj.settings.move.axis == "x") {
$(document).unbind('mousemove touchmove', obj._onDrag);
$(document).unbind('mouseup touchend', obj._onEnd);
obj.$scrollbarX.find(".ui-scrollbar-thumb").unbind('mouseup touchend', obj._onEnd);
}
return false;
},
_onDrag: function(event) {
var obj = event.data.obj;
if(!obj.settings.move.axis)
obj.settings.move.axis = event.data.axis;
if(obj.settings.move.axis == "y") {
if(!(obj.settings.overview.ratioY >= 1)) {
obj.settings.move.position.current = Math.min(
obj.settings.scrollbarY.track.height - obj.settings.scrollbarY.thumb.height,
Math.max(0, (obj.settings.move.position.start + (event.pageY - obj.settings.move.mouse.start)))
);
obj.settings.scrollbarY.pos = obj.settings.move.position.current * obj.settings.scrollbarY.ratio;
obj.$overview.css("top", -obj.settings.scrollbarY.pos);
obj.$scrollbarY.find(".ui-scrollbar-thumb").css("top", obj.settings.move.position.current);
}
}
if(obj.settings.move.axis == "x") {
if(!(obj.settings.overview.ratioX >= 1)) {
obj.settings.move.position.current = Math.min(
obj.settings.scrollbarX.track.width - obj.settings.scrollbarX.thumb.width,
Math.max(0, (obj.settings.move.position.start + (event.pageX - obj.settings.move.mouse.start)))
);
obj.settings.scrollbarX.pos = obj.settings.move.position.current * obj.settings.scrollbarX.ratio;
obj.$overview.css("left", -obj.settings.scrollbarX.pos);
obj.$scrollbarX.find(".ui-scrollbar-thumb").css("left", obj.settings.move.position.current);
}
}
return false;
},
_onWheel: function(event) {
var obj = event.data.obj;
if(event.originalEvent.wheelDeltaX)
obj.settings.move.axis = 'x';
else if(event.originalEvent.wheelDeltaY)
obj.settings.move.axis = 'y';
else if(!obj.settings.move.axis)
obj.settings.move.axis = event.data.axis;
if(obj.settings.move.axis == "y") {
if(!(obj.settings.overview.ratioY >= 1)) {
event = $.event.fix(event || window.event);
var delta = event.wheelDelta ? event.wheelDelta/120 : -event.detail/3;
obj.settings.scrollbarY.pos -= delta * obj.options.wheel;
obj.settings.scrollbarY.pos = Math.min(
obj.settings.overview.height - obj.settings.viewport.height,
Math.max(0, obj.settings.scrollbarY.pos)
);
if(obj.options.animate) {
obj.$scrollbarY.find(".ui-scrollbar-thumb").stop().animate({ "top": obj.settings.scrollbarY.pos / obj.settings.scrollbarY.ratio }, obj.options.animate.duration, obj.options.animate.easing);
obj.$overview.stop().animate({ "top": -obj.settings.scrollbarY.pos }, obj.options.animate.duration, obj.options.animate.easing);
}
else {
obj.$scrollbarY.find(".ui-scrollbar-thumb").css("top", obj.settings.scrollbarY.pos / obj.settings.scrollbarY.ratio);
obj.$overview.css("top", -obj.settings.scrollbarY.pos);
}
if(obj.settings.scrollbarY.pos > 0 && obj.settings.scrollbarY.pos < (obj.settings.overview.height - obj.settings.viewport.height))
event.preventDefault();
}
}
if(obj.settings.move.axis == "x") {
if(!(obj.settings.overview.ratioX >= 1)) {
event = $.event.fix(event || window.event);
var delta = event.wheelDelta ? event.wheelDelta/120 : -event.detail/3;
obj.settings.scrollbarX.pos -= delta * obj.options.wheel;
obj.settings.scrollbarX.pos = Math.min(
obj.settings.overview.width - obj.settings.viewport.width,
Math.max(0, obj.settings.scrollbarX.pos)
);
if(obj.options.animate) {
obj.$scrollbarX.find(".ui-scrollbar-thumb").stop().animate({ "left": obj.settings.scrollbarX.pos / obj.settings.scrollbarX.ratio }, obj.options.animate.duration, obj.options.animate.easing);
obj.$overview.stop().animate({ "left": -obj.settings.scrollbarX.pos }, obj.options.animate.duration, obj.options.animate.easing);
}
else {
obj.$scrollbarX.find(".ui-scrollbar-thumb").css("left", obj.settings.scrollbarX.pos / obj.settings.scrollbarX.ratio);
obj.$overview.css("left", -obj.settings.scrollbarX.pos);
}
if(obj.settings.scrollbarX.pos > 0 && obj.settings.scrollbarX.pos < (obj.settings.overview.width - obj.settings.viewport.width))
event.preventDefault();
}
}
},
_scrollTo: function(y, x) {
y = y || typeof y == "number" ? y : null;
x = x || typeof x == "number" ? x : null;
if(y || y === 0) {
var posY = Math.min(
this.settings.scrollbarY.track.height - this.settings.scrollbarY.thumb.height,
Math.max(0, y / this.settings.scrollbarY.ratio)
);
this.settings.scrollbarY.pos = posY * this.settings.scrollbarY.ratio;
this.$overview.css("top", -this.settings.scrollbarY.pos);
this.$scrollbarY.find(".ui-scrollbar-thumb").css("top", posY);
}
if(x || x === 0) {
var posX = Math.min(
this.settings.scrollbarX.track.width - this.settings.scrollbarX.thumb.width,
Math.max(0, x / this.settings.scrollbarX.ratio)
);
this.settings.scrollbarX.pos = posX * this.settings.scrollbarX.ratio;
this.$overview.css("left", -this.settings.scrollbarX.pos);
this.$scrollbarX.find(".ui-scrollbar-thumb").css("left", posX);
}
},
/* PUBLIC METHODS */
/**
* Refresh state, call this on content change
*
*
* refresh()
* -> Only refresh
*
* refresh(offsetX[, offsetY])
* -> Refresh and scroll to [x,y] coordinates
*
* refresh(selector)
* -> Refresh and scroll to selector first element position
*
* refresh(jQuery object)
* -> Refresh and scroll to jQuery object position
*/
refresh: function(scrollToX, scrollToY) {
this.$container.width(this._outerWidth);
this.$container.height(this._outerHeight);
this.$viewport.width(this.options.overlay ? this._outerWidth : this._outerWidth - this.$scrollbarY.outerWidth());
this.$viewport.height(this.options.overlay ? this._outerHeight : this._outerHeight - this.$scrollbarX.outerHeight());
if(this._scrollY) {
this.$overview.css({ height: 'auto' });
this.settings.viewport.height = this.$viewport.outerHeight();
this.settings.overview.height = this.$overview.outerHeight();
if(this._scrollX) {
this.$overview.css({ width: 'auto' });
this.settings.viewport.width = this.$viewport.outerWidth();
this.settings.overview.width = this.$overview.outerWidth();
this.settings.overview.ratioX = this.settings.viewport.width / this.settings.overview.width;
}
this.settings.overview.ratioY = this.settings.viewport.height / this.settings.overview.height;
this.settings.scrollbarY.offsetHeight = this.$scrollbarY.outerHeight() - this.$scrollbarY.height();
this.settings.scrollbarY.track.height = this._trackYHeight == 0 ?
this.settings.viewport.height - this.settings.scrollbarY.offsetHeight - (this._scrollX && this.options.overlay && this.settings.overview.ratioX < 1 ? this.$scrollbarX.outerHeight() : 0) :
this.$scrollbarY.find(".ui-scrollbar-track").height();
this.settings.scrollbarY.thumb.height = this._thumbYHeight == 0 ?
Math.min(this.settings.scrollbarY.track.height, Math.max(0, (this.settings.scrollbarY.track.height * this.settings.overview.ratioY))) :
this.$scrollbarY.find(".ui-scrollbar-thumb").height();
this.settings.scrollbarY.ratio = (this.settings.overview.height - this._trackYHeight) / this.settings.scrollbarY.track.height;
this.settings.scrollbarY.pos = 0;
this.$scrollbarY.toggleClass("disabled ui-scrollbar-disabled", this.settings.overview.ratioY >= 1);
}
if(this._scrollX) {
this.$overview.css({ width: 'auto' });
this.settings.viewport.width = this.$viewport.outerWidth();
this.settings.overview.width = this.$overview.outerWidth();
if(this._scrollY && !this.settings.overview.ratioY) {
this.$overview.css({ height: 'auto' });
this.settings.viewport.height = this.$viewport.outerHeight();
this.settings.overview.height = this.$overview.outerHeight();
this.settings.overview.ratioY = this.settings.viewport.height / this.settings.overview.height;
}
this.settings.overview.ratioX = this.settings.viewport.width / this.settings.overview.width;
this.settings.scrollbarX.offsetWidth = this.$scrollbarX.outerWidth() - this.$scrollbarX.width();
this.settings.scrollbarX.track.width = this._trackXWidth == 0 ?
this.settings.viewport.width - this.settings.scrollbarX.offsetWidth - (this._scrollY && this.options.overlay && this.settings.overview.ratioY < 1 ? this.$scrollbarY.outerWidth() : 0) :
this.$scrollbarX.find(".ui-scrollbar-track").width();
this.settings.scrollbarX.thumb.width = this._thumbXWidth == 0 ?
Math.min(this.settings.scrollbarX.track.width, Math.max(0, (this.settings.scrollbarX.track.width * this.settings.overview.ratioX))) :
this.$scrollbarX.find(".ui-scrollbar-thumb").width();
this.settings.scrollbarX.ratio = (this.settings.overview.width - this._trackXWidth) / this.settings.scrollbarX.track.width;
this.settings.scrollbarX.pos = 0;
this.$scrollbarX.toggleClass("disabled ui-scrollbar-disabled", this.settings.overview.ratioX >= 1);
}
this._setSize();
if(this.options.autohide) {
this.$container.unbind('mouseenter touchstart mouseleave touchend');
if(this._scrollY && !this.$scrollbarY.hasClass("ui-scrollbar-disabled")) {
this.$scrollbarY.hide();
var $scrollbarY = this.$scrollbarY;
this.$container
.bind('mouseenter touchstart', function(){ $scrollbarY.stop(true, true).fadeIn(400); })
.bind('mouseleave touchend', function(){ $scrollbarY.stop(true, true).delay(500).fadeOut(600); });
}
if(this._scrollX && !this.$scrollbarX.hasClass("ui-scrollbar-disabled")) {
this.$scrollbarX.hide();
var $scrollbarX = this.$scrollbarX;
this.$container.hover(
function(){ $scrollbarX.stop(true, true).fadeIn(400); },
function(){ $scrollbarX.stop(true, true).delay(500).fadeOut(600); }
);
}
}
if((scrollToY || typeof scrollToY == "number") || (scrollToX || typeof scrollToX == "number"))
this.scrollTo(scrollToY, scrollToX);
},
/**
* Scroll to coordinates or element
*
*
* scrollTo(offsetX[, offsetY])
* -> Scroll to [x,y] coordinates
*
* scrollTo(selector)
* -> Scroll to selector first element position
*
* scrollTo(jQuery object)
* -> Scroll to jQuery object position
*/
scrollTo: function(to, x) {
switch(typeof to) {
case "number":
this._scrollTo(to, x);
break;
case "string":
var $elem = this.$overview.find(to);
if(!$elem.length)
return false;
var pos = $elem.first().position();
this._scrollTo(pos.top, pos.left);
break;
case "object":
var $elem = this.$overview.find(to[0]);
if(!$elem.length)
return false;
var pos = $elem.first().position();
this._scrollTo(pos.top, pos.left);
break;
}
}
});
$[scrollbar].count = 0;
})(jQuery, 'scrollbar');