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| /* | |
| --- | |
| name: Element.Events.change | |
| description: Contains Element methods for normalizing change events across browsers for checkboxes and radios. | |
| license: MIT-style license. | |
| requires: Element.Event | |
| provides: Element.Events.change | |
| ... | |
| */ | |
| (function(){ | |
| var hasListener = !!window.addEventListener; | |
| var update = function(event){ | |
| event.target.store('$change', { | |
| type: event.type, | |
| value: event.target.checked | |
| }); | |
| }; | |
| Element.Events.change = { | |
| base: 'click', | |
| condition: function(event){ | |
| var target = event.target; | |
| if (target.get('type') != 'radio') return true; | |
| return (event.type == 'keyup') ? !target.checked : target.checked; | |
| }, | |
| onAdd: function(fn){ | |
| var type = this.get('type'); | |
| if (type == 'checkbox' || type == 'radio') this.addEvents(this.retrieve('$change:events', { | |
| focus: update, | |
| keydown: update, | |
| keyup: function(event){ | |
| var code = event.which || event.keyCode, element = event.target, value = element.retrieve('$change').value; | |
| if (!hasListener && value != null && value != element.checked){ | |
| if ((type == 'checkbox' && code == 32) || (type == 'radio' && code >= 37 && code <= 39)) fn.call(this, event) | |
| } | |
| } | |
| }); | |
| }, | |
| onRemove: function(){ | |
| this.removeEvents(this.retrieve('$change:events')).eliminate('$change:events'); | |
| } | |
| }; | |
| })(); |
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