/**
+ * @class Ext.form.Radio
+ * @extends Ext.form.Checkbox
+ * Single radio field. Same as Checkbox, but provided as a convenience for automatically setting the input type.
+ * Radio grouping is handled automatically by the browser if you give each radio in a group the same name.
+ * @constructor
+ * Creates a new Radio
+ * @param {Object} config Configuration options
+ * @xtype radio
+ */
+Ext.form.Radio = Ext.extend(Ext.form.Checkbox, {
+ inputType: 'radio',
+
+ /**
+ * Overridden and disabled. The editor element does not support standard valid/invalid marking. @hide
+ * @method
+ */
+ markInvalid : Ext.emptyFn,
+ /**
+ * Overridden and disabled. The editor element does not support standard valid/invalid marking. @hide
+ * @method
+ */
+ clearInvalid : Ext.emptyFn,
+
+ /**
+ * If this radio is part of a group, it will return the selected value
+ * @return {String}
+ */
+ getGroupValue : function(){
+ var p = this.el.up('form') || Ext.getBody();
+ var c = p.child('input[name='+this.el.dom.name+']:checked', true);
+ return c ? c.value : null;
+ },
+
+ // private
+ onClick : function(){
+ if(this.el.dom.checked != this.checked){
+ var els = this.getCheckEl().select('input[name=' + this.el.dom.name + ']');
+ els.each(function(el){
+ if(el.dom.id == this.id){
+ this.setValue(true);
+ }else{
+ Ext.getCmp(el.dom.id).setValue(false);
+ }
+ }, this);
+ }
+ },
+
+ /**
+ * Sets either the checked/unchecked status of this Radio, or, if a string value
+ * is passed, checks a sibling Radio of the same name whose value is the value specified.
+ * @param value {String/Boolean} Checked value, or the value of the sibling radio button to check.
+ * @return {Ext.form.Field} this
+ */
+ setValue : function(v){
+ if (typeof v == 'boolean') {
+ Ext.form.Radio.superclass.setValue.call(this, v);
+ } else {
+ var r = this.getCheckEl().child('input[name=' + this.el.dom.name + '][value=' + v + ']', true);
+ if(r){
+ Ext.getCmp(r.id).setValue(true);
+ }
+ }
+ return this;
+ },
+
+ // private
+ getCheckEl: function(){
+ if(this.inGroup){
+ return this.el.up('.x-form-radio-group')
+ }
+ return this.el.up('form') || Ext.getBody();
+ }
+});
+Ext.reg('radio', Ext.form.Radio);
+