// script.aculo.us controls.js v1.8.3, Thu Oct 08 11:23:33 +0200 2009

// Copyright (c) 2005-2009 Thomas Fuchs (http://script.aculo.us, http://mir.aculo.us)
//           (c) 2005-2009 Ivan Krstic (http://blogs.law.harvard.edu/ivan)
//           (c) 2005-2009 Jon Tirsen (http://www.tirsen.com)
// Contributors:
//  Richard Livsey
//  Rahul Bhargava
//  Rob Wills
//
// script.aculo.us is freely distributable under the terms of an MIT-style license.
// For details, see the script.aculo.us web site: http://script.aculo.us/

if(!Control)var Control={}; Control.Slider=Class.create({initialize:function(a,b,c){var d=this;this.handles=Object.isArray(a)?a.collect(function(e){return $(e)}):[$(a)];this.track=$(b);this.options=c||{};this.axis=this.options.axis||"horizontal";this.increment=this.options.increment||1;this.step=parseInt(this.options.step||"1");this.range=this.options.range||$R(0,1);this.value=0;this.values=this.handles.map(function(){return 0});this.spans=this.options.spans?this.options.spans.map(function(e){return $(e)}):false;this.options.startSpan= $(this.options.startSpan||null);this.options.endSpan=$(this.options.endSpan||null);this.restricted=this.options.restricted||false;this.maximum=this.options.maximum||this.range.end;this.minimum=this.options.minimum||this.range.start;this.alignX=parseInt(this.options.alignX||"0");this.alignY=parseInt(this.options.alignY||"0");this.trackLength=this.maximumOffset()-this.minimumOffset();this.handleLength=this.isVertical()?this.handles[0].offsetHeight!=0?this.handles[0].offsetHeight:this.handles[0].style.height.replace(/px$/, ""):this.handles[0].offsetWidth!=0?this.handles[0].offsetWidth:this.handles[0].style.width.replace(/px$/,"");this.disabled=this.dragging=this.active=false;this.options.disabled&&this.setDisabled();if(this.allowedValues=this.options.values?this.options.values.sortBy(Prototype.K):false){this.minimum=this.allowedValues.min();this.maximum=this.allowedValues.max()}this.eventMouseDown=this.startDrag.bindAsEventListener(this);this.eventMouseUp=this.endDrag.bindAsEventListener(this);this.eventMouseMove=this.update.bindAsEventListener(this); this.handles.each(function(e,f){f=d.handles.length-1-f;d.setValue(parseFloat((Object.isArray(d.options.sliderValue)?d.options.sliderValue[f]:d.options.sliderValue)||d.range.start),f);e.makePositioned().observe("mousedown",d.eventMouseDown)});this.track.observe("mousedown",this.eventMouseDown);document.observe("mouseup",this.eventMouseUp);document.observe("mousemove",this.eventMouseMove);this.initialized=true},dispose:function(){var a=this;Event.stopObserving(this.track,"mousedown",this.eventMouseDown); Event.stopObserving(document,"mouseup",this.eventMouseUp);Event.stopObserving(document,"mousemove",this.eventMouseMove);this.handles.each(function(b){Event.stopObserving(b,"mousedown",a.eventMouseDown)})},setDisabled:function(){this.disabled=true},setEnabled:function(){this.disabled=false},getNearestValue:function(a){if(this.allowedValues){if(a>=this.allowedValues.max())return this.allowedValues.max();if(a<=this.allowedValues.min())return this.allowedValues.min();var b=Math.abs(this.allowedValues[0]- a),c=this.allowedValues[0];this.allowedValues.each(function(d){var e=Math.abs(d-a);if(e<=b){c=d;b=e}});return c}if(a>this.range.end)return this.range.end;if(a<this.range.start)return this.range.start;return a},setValue:function(a,b){if(!this.active){this.activeHandleIdx=b||0;this.activeHandle=this.handles[this.activeHandleIdx];this.updateStyles()}b=b||this.activeHandleIdx||0;if(this.initialized&&this.restricted){if(b>0&&a<this.values[b-1])a=this.values[b-1];if(b<this.handles.length-1&&a>this.values[b+ 1])a=this.values[b+1]}a=this.getNearestValue(a);this.values[b]=a;this.value=this.values[0];this.handles[b].style[this.isVertical()?"top":"left"]=this.translateToPx(a);this.drawSpans();if(!this.dragging||!this.event)this.updateFinished()},setValueBy:function(a,b){this.setValue(this.values[b||this.activeHandleIdx||0]+a,b||this.activeHandleIdx||0)},translateToPx:function(a){return Math.round((this.trackLength-this.handleLength)/(this.range.end-this.range.start)*(a-this.range.start))+"px"},translateToValue:function(a){return a/ (this.trackLength-this.handleLength)*(this.range.end-this.range.start)+this.range.start},getRange:function(a){var b=this.values.sortBy(Prototype.K);a=a||0;return $R(b[a],b[a+1])},minimumOffset:function(){return this.isVertical()?this.alignY:this.alignX},maximumOffset:function(){return this.isVertical()?(this.track.offsetHeight!=0?this.track.offsetHeight:this.track.style.height.replace(/px$/,""))-this.alignY:(this.track.offsetWidth!=0?this.track.offsetWidth:this.track.style.width.replace(/px$/,""))- this.alignX},isVertical:function(){return this.axis=="vertical"},drawSpans:function(){var a=this;this.spans&&$R(0,this.spans.length-1).each(function(b){a.setSpan(a.spans[b],a.getRange(b))});if(this.options.startSpan)this.setSpan(this.options.startSpan,$R(0,this.values.length>1?this.getRange(0).min():this.value));if(this.options.endSpan)this.setSpan(this.options.endSpan,$R(this.values.length>1?this.getRange(this.spans.length-1).max():this.value,this.maximum))},setSpan:function(a,b){if(this.isVertical()){a.style.top= this.translateToPx(b.start);a.style.height=this.translateToPx(b.end-b.start+this.range.start)}else{a.style.left=this.translateToPx(b.start);a.style.width=this.translateToPx(b.end-b.start+this.range.start)}},updateStyles:function(){this.handles.each(function(a){Element.removeClassName(a,"selected")});Element.addClassName(this.activeHandle,"selected")},startDrag:function(a){if(Event.isLeftClick(a)){if(!this.disabled){this.active=true;var b=Event.element(a),c=[Event.pointerX(a),Event.pointerY(a)];if(b== this.track){b=this.track.cumulativeOffset();this.event=a;this.setValue(this.translateToValue((this.isVertical()?c[1]-b[1]:c[0]-b[0])-this.handleLength/2));b=this.activeHandle.cumulativeOffset();this.offsetX=c[0]-b[0];this.offsetY=c[1]-b[1]}else{for(;this.handles.indexOf(b)==-1&&b.parentNode;)b=b.parentNode;if(this.handles.indexOf(b)!=-1){this.activeHandle=b;this.activeHandleIdx=this.handles.indexOf(this.activeHandle);this.updateStyles();b=this.activeHandle.cumulativeOffset();this.offsetX=c[0]-b[0]; this.offsetY=c[1]-b[1]}}}Event.stop(a)}},update:function(a){if(this.active){if(!this.dragging)this.dragging=true;this.draw(a);Prototype.Browser.WebKit&&window.scrollBy(0,0);Event.stop(a)}},draw:function(a){var b=[Event.pointerX(a),Event.pointerY(a)],c=this.track.cumulativeOffset();b[0]-=this.offsetX+c[0];b[1]-=this.offsetY+c[1];this.event=a;this.setValue(this.translateToValue(this.isVertical()?b[1]:b[0]));if(this.initialized&&this.options.onSlide)this.options.onSlide(this.values.length>1?this.values: this.value,this)},endDrag:function(a){if(this.active&&this.dragging){this.finishDrag(a,true);Event.stop(a)}this.dragging=this.active=false},finishDrag:function(){this.dragging=this.active=false;this.updateFinished()},updateFinished:function(){if(this.initialized&&this.options.onChange)this.options.onChange(this.values.length>1?this.values:this.value,this);this.event=null}});