Created
August 30, 2012 16:00
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Alternator Javascript Control
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| function Alternator(opts){ | |
| var options = { | |
| activate:function(){}, | |
| deactivate:function(){}, | |
| elements: [], | |
| active: 0 | |
| }; | |
| // Overwrite defaults with user options | |
| for(var opt in opts) if(opts.hasOwnProperty(opt)){ | |
| options[opt] = opts[opt]; | |
| } | |
| // Set the action(s) to be performed when an element is | |
| // activated or deactivated | |
| this.activate = options.activate; | |
| this.deactivate = options.deactivate; | |
| // If the user specified an element index for the currently active, | |
| // replace it with an element reference | |
| if(typeof options.active === 'number'){ | |
| options.active = options.elements[options.active] || options.elements[0]; | |
| } | |
| if(options.active) this.activate(options.active); | |
| // Add element(s) to Alternator | |
| this.add = function(el){ | |
| if(!el) return; | |
| if(el.length){ | |
| Array.prototype.forEach.call(el,function(el){ | |
| options.elements.push(el); | |
| }) | |
| }else{ | |
| options.elements.push(el); | |
| } | |
| return this; | |
| } | |
| this.getElements = function(){ | |
| return options.elements; | |
| } | |
| // Set the currently active element | |
| this.set = function(el){ | |
| var self = this; | |
| if(typeof el === 'number'){ | |
| if(options.elements[el]){ | |
| if(options.active) self.deactivate(options.active); | |
| self.activate(options.elements[el]); | |
| options.active = options.elements[el]; | |
| }else{ | |
| throw new Error('Invalid element index'); | |
| } | |
| }else{ | |
| options.elements.forEach(function(e){ | |
| if(e === el){ | |
| if(options.active) self.deactivate(options.active); | |
| self.activate(e); | |
| options.active = e; | |
| } | |
| }) | |
| } | |
| return this; | |
| } | |
| return this; | |
| } |
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| <!doctype html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Alternator Class</title> | |
| <style> | |
| .container, .also_container, .container_too{display:inline-block; background:#ccc; width:100px; height:100px;} | |
| .active{background:steelblue;} | |
| </style> | |
| <script src="Alternator.js"></script> | |
| </head> | |
| <body> | |
| <div class="container"></div> | |
| <div class="container"></div> | |
| <div class="container"></div> | |
| <div class="container"></div> | |
| <div class="container"></div> | |
| <div class="container"></div> | |
| <div class="container"></div> | |
| <div class="container"></div> | |
| <div class="container"></div> | |
| <div class="container"></div> | |
| <div class="container"></div> | |
| <div class="container"></div> | |
| <script> | |
| var alt = new Alternator({ | |
| activate:function(el){ | |
| el.className = 'container active'; | |
| }, | |
| deactivate:function(el){ | |
| el.className = 'container'; | |
| }, | |
| elements: Array.prototype.slice.call(document.querySelectorAll('.container')), | |
| active: 2 | |
| }); | |
| alt.getElements().forEach(function(el){ | |
| el.addEventListener('click',function(evt){ | |
| alt.set(el); | |
| }) | |
| }) | |
| </script> | |
| </body> | |
| </html> |
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