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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1 | espaco | 1 | //** jQuery Scroll to Top Control script- (c) Dynamic Drive DHTML code library: http://www.dynamicdrive.com. |
| 2 | //** Available/ usage terms at http://www.dynamicdrive.com (March 30th, 09') |
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| 3 | //** v1.1 (April 7th, 09'): |
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| 4 | //** 1) Adds ability to scroll to an absolute position (from top of page) or specific element on the page instead. |
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| 5 | //** 2) Fixes scroll animation not working in Opera. |
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| 6 | |||
| 7 | |||
| 8 | var scrolltotop={ |
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| 9 | //startline: Integer. Number of pixels from top of doc scrollbar is scrolled before showing control |
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| 10 | //scrollto: Keyword (Integer, or "Scroll_to_Element_ID"). How far to scroll document up when control is clicked on (0=top). |
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| 11 | setting: {startline:100, scrollto: 0, scrollduration:1000, fadeduration:[500, 100]}, |
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| 12 | controlHTML: '<img src="../../assets/frontend/layout/img/up.png" style="width:40px; height:40px" />', //HTML for control, which is auto wrapped in DIV w/ ID="topcontrol" |
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| 13 | controlattrs: {offsetx:10, offsety:10}, //offset of control relative to right/ bottom of window corner |
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| 14 | anchorkeyword: '#top', //Enter href value of HTML anchors on the page that should also act as "Scroll Up" links |
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| 15 | |||
| 16 | state: {isvisible:false, shouldvisible:false}, |
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| 17 | |||
| 18 | scrollup:function(){ |
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| 19 | if (!this.cssfixedsupport) //if control is positioned using JavaScript |
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| 20 | this.$control.css({opacity:0}) //hide control immediately after clicking it |
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| 21 | var dest=isNaN(this.setting.scrollto)? this.setting.scrollto : parseInt(this.setting.scrollto) |
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| 22 | if (typeof dest=="string" && jQuery('#'+dest).length==1) //check element set by string exists |
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| 23 | dest=jQuery('#'+dest).offset().top |
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| 24 | else |
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| 25 | dest=0 |
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| 26 | this.$body.animate({scrollTop: dest}, this.setting.scrollduration); |
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| 27 | }, |
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| 28 | |||
| 29 | keepfixed:function(){ |
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| 30 | var $window=jQuery(window) |
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| 31 | var controlx=$window.scrollLeft() + $window.width() - this.$control.width() - this.controlattrs.offsetx |
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| 32 | var controly=$window.scrollTop() + $window.height() - this.$control.height() - this.controlattrs.offsety |
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| 33 | this.$control.css({left:controlx+'px', top:controly+'px'}) |
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| 34 | }, |
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| 35 | |||
| 36 | togglecontrol:function(){ |
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| 37 | var scrolltop=jQuery(window).scrollTop() |
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| 38 | if (!this.cssfixedsupport) |
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| 39 | this.keepfixed() |
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| 40 | this.state.shouldvisible=(scrolltop>=this.setting.startline)? true : false |
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| 41 | if (this.state.shouldvisible && !this.state.isvisible){ |
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| 42 | this.$control.stop().animate({opacity:1}, this.setting.fadeduration[0]) |
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| 43 | this.state.isvisible=true |
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| 44 | } |
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| 45 | else if (this.state.shouldvisible==false && this.state.isvisible){ |
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| 46 | this.$control.stop().animate({opacity:0}, this.setting.fadeduration[1]) |
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| 47 | this.state.isvisible=false |
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| 48 | } |
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| 49 | }, |
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| 50 | |||
| 51 | init:function(){ |
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| 52 | jQuery(document).ready(function($){ |
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| 53 | var mainobj=scrolltotop |
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| 54 | var iebrws=document.all |
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| 55 | mainobj.cssfixedsupport=!iebrws || iebrws && document.compatMode=="CSS1Compat" && window.XMLHttpRequest //not IE or IE7+ browsers in standards mode |
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| 56 | mainobj.$body=(window.opera)? (document.compatMode=="CSS1Compat"? $('html') : $('body')) : $('html,body') |
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| 57 | mainobj.$control=$('<div id="topcontrol">'+mainobj.controlHTML+'</div>') |
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| 58 | .css({position:mainobj.cssfixedsupport? 'fixed' : 'absolute', bottom:mainobj.controlattrs.offsety, right:mainobj.controlattrs.offsetx, opacity:0, cursor:'pointer'}) |
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| 59 | .attr({title:'Scroll Back to Top'}) |
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| 60 | .click(function(){mainobj.scrollup(); return false}) |
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| 61 | .appendTo('body') |
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| 62 | if (document.all && !window.XMLHttpRequest && mainobj.$control.text()!='') //loose check for IE6 and below, plus whether control contains any text |
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| 63 | mainobj.$control.css({width:mainobj.$control.width()}) //IE6- seems to require an explicit width on a DIV containing text |
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| 64 | mainobj.togglecontrol() |
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| 65 | $('a[href="' + mainobj.anchorkeyword +'"]').click(function(){ |
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| 66 | mainobj.scrollup() |
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| 67 | return false |
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| 68 | }) |
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| 69 | $(window).bind('scroll resize', function(e){ |
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| 70 | mainobj.togglecontrol() |
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| 71 | }) |
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| 72 | }) |
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| 73 | } |
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| 74 | } |
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| 75 | |||
| 76 | scrolltotop.init() |