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Filename : spinner.js
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var Spinner=function(element,options){this.$element=$(element);this.options=$.extend({},$.fn.spinner.defaults,options);this.$input=this.$element.find('.spinner-input');this.$element.on('keyup',this.$input,$.proxy(this.change,this));if(this.options.hold){this.$element.on('mousedown','.spinner-up',$.proxy(function(){this.startSpin(true);},this));this.$element.on('mouseup','.spinner-up, .spinner-down',$.proxy(this.stopSpin,this));this.$element.on('mouseout','.spinner-up, .spinner-down',$.proxy(this.stopSpin,this));this.$element.on('mousedown','.spinner-down',$.proxy(function(){this.startSpin(false);},this));}else{this.$element.on('click','.spinner-up',$.proxy(function(){this.step(true);},this));this.$element.on('click','.spinner-down',$.proxy(function(){this.step(false);},this));}
this.switches={count:1,enabled:true};if(this.options.speed==='medium'){this.switches.speed=300;}else if(this.options.speed==='fast'){this.switches.speed=100;}else{this.switches.speed=500;}
this.lastValue=null;this.render();if(this.options.disabled){this.disable();}};Spinner.prototype={constructor:Spinner,render:function(){var inputValue=this.$input.val();if(inputValue){this.value(inputValue);}else{this.$input.val(this.options.value);}
this.$input.attr('maxlength',(this.options.max+'').split('').length);},change:function(){var newVal=this.$input.val();if(newVal/1){this.options.value=newVal/1;}else{newVal=newVal.replace(/[^0-9]/g,'')||'';this.$input.val(newVal);this.options.value=newVal/1;}
this.triggerChangedEvent();},stopSpin:function(){if(this.switches.timeout!==undefined){clearTimeout(this.switches.timeout);this.switches.count=1;this.triggerChangedEvent();}},triggerChangedEvent:function(){var currentValue=this.value();if(currentValue===this.lastValue)return;this.lastValue=currentValue;this.$element.trigger('changed',currentValue);this.$element.trigger('change');},startSpin:function(type){if(!this.options.disabled){var divisor=this.switches.count;if(divisor===1){this.step(type);divisor=1;}else if(divisor<3){divisor=1.5;}else if(divisor<8){divisor=2.5;}else{divisor=4;}
this.switches.timeout=setTimeout($.proxy(function(){this.iterator(type);},this),this.switches.speed/divisor);this.switches.count++;}},iterator:function(type){this.step(type);this.startSpin(type);},step:function(dir){var curValue=this.options.value;var limValue=dir?this.options.max:this.options.min;var digits,multiple;if((dir?curValue<limValue:curValue>limValue)){var newVal=curValue+(dir?1:-1)*this.options.step;if(this.options.step%1!==0){digits=(this.options.step+'').split('.')[1].length;multiple=Math.pow(10,digits);newVal=Math.round(newVal*multiple)/multiple;}
if(dir?newVal>limValue:newVal<limValue){this.value(limValue);}else{this.value(newVal);}}else if(this.options.cycle){var cycleVal=dir?this.options.min:this.options.max;this.value(cycleVal);}},value:function(value){if(!isNaN(parseFloat(value))&&isFinite(value)){value=parseFloat(value);this.options.value=value;this.$input.val(value);return this;}else{return this.options.value;}},disable:function(){this.options.disabled=true;this.$input.attr('disabled','');this.$element.find('button').addClass('disabled');},enable:function(){this.options.disabled=false;this.$input.removeAttr("disabled");this.$element.find('button').removeClass('disabled');}};$.fn.spinner=function(option){var args=Array.prototype.slice.call(arguments,1);var methodReturn;var $set=this.each(function(){var $this=$(this);var data=$this.data('spinner');var options=typeof option==='object'&&option;if(!data)$this.data('spinner',(data=new Spinner(this,options)));if(typeof option==='string')methodReturn=data[option].apply(data,args);});return(methodReturn===undefined)?$set:methodReturn;};$.fn.spinner.defaults={value:1,min:1,max:999,step:1,hold:true,speed:'medium',disabled:false};$.fn.spinner.Constructor=Spinner;$.fn.spinner.noConflict=function(){$.fn.spinner=old;return this;};$(function(){$('body').on('mousedown.spinner.data-api','.spinner',function(){var $this=$(this);if($this.data('spinner'))return;$this.spinner($this.data());});});