define("dijit/form/_ToggleButtonMixin", [
	"dojo/_base/declare", // declare
	"dojo/dom-attr" // domAttr.set
], function(declare, domAttr){

// module:
//		dijit/form/_ToggleButtonMixin

return declare("dijit.form._ToggleButtonMixin", null, {
	// summary:
	//		A mixin to provide functionality to allow a button that can be in two states (checked or not).

	// checked: Boolean
	//		Corresponds to the native HTML `<input>` element's attribute.
	//		In markup, specified as "checked='checked'" or just "checked".
	//		True if the button is depressed, or the checkbox is checked,
	//		or the radio button is selected, etc.
	checked: false,

	// aria-pressed for toggle buttons, and aria-checked for checkboxes
	_aria_attr: "aria-pressed",

	_onClick: function(/*Event*/ evt){
		var original = this.checked;
		this._set('checked', !original); // partially set the toggled value, assuming the toggle will work, so it can be overridden in the onclick handler
		var ret = this.inherited(arguments); // the user could reset the value here
		this.set('checked', ret ? this.checked : original); // officially set the toggled or user value, or reset it back
		return ret;
	},

	_setCheckedAttr: function(/*Boolean*/ value, /*Boolean?*/ priorityChange){
		this._set("checked", value);
		var node = this.focusNode || this.domNode;
		if(this._created){ // IE is not ready to handle checked attribute (affects tab order)
			// needlessly setting "checked" upsets IE's tab order
			if(domAttr.get(node, "checked") != !!value){
				domAttr.set(node, "checked", !!value); // "mixed" -> true
			}
		}
		node.setAttribute(this._aria_attr, String(value)); // aria values should be strings
		this._handleOnChange(value, priorityChange);
	},

	postCreate: function(){ // use postCreate instead of startup so users forgetting to call startup are OK
		this.inherited(arguments);
		var node = this.focusNode || this.domNode;
		if(this.checked){
			// need this here instead of on the template so IE8 tab order works
			node.setAttribute('checked', 'checked');
		}

		// Update our reset value if it hasn't yet been set (because this.set()
		// is only called when there *is* a value)
		if(this._resetValue === undefined){
			this._lastValueReported = this._resetValue = this.checked;
		}
	},

	reset: function(){
		// summary:
		//		Reset the widget's value to what it was at initialization time

		this._hasBeenBlurred = false;

		// set checked state to original setting
		this.set('checked', this.params.checked || false);
	}
});

});
