/*
Copyright (c) 2010, Yahoo! Inc. All rights reserved.
Code licensed under the BSD License:
http://developer.yahoo.com/yui/license.html
version: 3.3.0
build: 3167
*/
YUI.add('dial', function(Y) {

/**
 * Create a circular dial value range input visualized as a draggable handle on a
 * background element.
 * 
 * @module dial
 */
	var supportsVML = false,
        testVMLNode;

	if (Y.UA.ie && Y.UA.ie < 9){
        supportsVML = true;
	}

    var Lang = Y.Lang,
        Widget = Y.Widget,
        Node = Y.Node;

	/**
	 * Create a dial to represent an input control capable of representing a
	 * series of intermediate states based on the position of the Dial's handle.
	 * These states are typically aligned to a value algorithm whereby the angle of the handle's
	 * position corresponds to a given value.
	 *
	 * @class Dial
	 * @extends Widget
	 * @param config {Object} Configuration object
	 * @constructor
	 */
    function Dial(config) {
        Dial.superclass.constructor.apply(this, arguments);
    }

    // Y.Dial static properties

    /**
     * The identity of the widget.
     *
     * @property Dial.NAME
     * @type String
     * @default 'dial'
     * @readOnly
     * @protected
     * @static
     */
    Dial.NAME = "dial";

    /**
     * Static property used to define the default attribute configuration of
     * the Widget.
     *
     * @property Dial.ATTRS
     * @type {Object}
     * @protected
     * @static
     */
    Dial.ATTRS = {

		/**
         * minimum value allowed
         *
         * @attribute min
         * @type {Number}
         * @default -220
         */
        min : {
            value:-220
        },

		/**
         * maximum value allowed
         *
         * @attribute max
         * @type {Number}
         * @default 220
         */
        max : {
            value:220
        },

		/**
         * diameter of the circular background object.
		 * Other objects scale accordingly
		 * Set this only before rendering.
         *
         * @attribute diameter
         * @type {Number} the number of px in diameter
         * @default 100
		 * @writeOnce
         */
		diameter : {
			value:100
		},

		/**
		 * initial value of the Dial
         *
         * @attribute value
         * @type {Number}
         * @default 0
         */
        value : {
            value:0,
            validator: function(val) {
                return this._validateValue(val);
            }
        },
		
		/**
		 * amount to increment/decrement the dial value
		 * when the arrow up/down/left/right keys are pressed
         *
         * @attribute minorStep
         * @type {Number}
         * @default 1
         */
        minorStep : {
            value:1
        },

		/**
		 * amount to increment/decrement the dial value
		 * when the page up/down keys are pressed
         *
         * @attribute majorStep
         * @type {Number}
         * @default 10
         */
        majorStep : {
            value:10
        },

		/**
		 * number of value increments in one 360 degree revolution 
		 * of the handle around the dial
         *
         * @attribute stepsPerRev
         * @type {Number}
         * @default 100
         */
		stepsPerRev : {
			value:100
		},

		/**
		 * number of decimal places of accuracy in the value 
         *
         * @attribute decimalPlaces
         * @type {Number}
         * @default 0
         */
		decimalPlaces : {
			value:0
		},

		/**
		 * visible strings for the dial UI. This attribute is 
		 * defined by the base Widget class but has an empty value. The
		 * Dial is simply providing a default value for the attribute.
		 * Gets localized strings in the current language
         *
         * @attribute strings
         * @type {Object}
         * @default {label: 'My label', resetStr: 'Reset', tooltipHandle: 'Drag to set value'}
         */
        strings: {
			valueFn: function () {
				return Y.Intl.get('dial');
			}
        },

		/**
		 * distance from the center of the dial to the 
		 * resting place of the center of the handle and marker. 
		 * The value is a percent of the radius of the dial.
         *
         * @attribute handleDist
         * @type {number}
         * @default 0.75
         */
		handleDist:{
			value:0.75
		}
		
    };

	/**
	 * returns a properly formed yui class name
	 *
	 * @function
	 * @param {String} string to be appended at the end of class name
	 * @return
	 * @private
	 */
	function makeClassName(str) {
		return Y.ClassNameManager.getClassName(Dial.NAME, str);
	}
	
    /**
	 * array of static constants used to identify the classname applied to the Dial DOM objects 
	 *
     * @property Dial.CSS_CLASSES
     * @type {Array}
	 * @private
     * @static
	 */
	Dial.CSS_CLASSES = {
		label : makeClassName("label"),
		labelString : makeClassName("label-string"),
		valueString : makeClassName("value-string"),
		northMark : makeClassName("north-mark"),
		ring : makeClassName('ring'),
		ringVml : makeClassName('ring-vml'),
		marker : makeClassName("marker"),
		markerUser : makeClassName("marker-user"),
		markerUserVml : makeClassName("marker-user-vml"),
		centerButton : makeClassName("center-button"),
		centerButtonVml : makeClassName('center-button-vml'),
		resetString : makeClassName("reset-str"),
		handle : makeClassName("handle"),
		handleUser : makeClassName("handle-user"),
		handleUserVml : makeClassName("handle-user-vml"),
		markerHidden : makeClassName("marker-hidden"),
		dragging : Y.ClassNameManager.getClassName("dd-dragging")
	};
    
	
    /* Static constants used to define the markup templates used to create Dial DOM elements */
	var labelId = Dial.CSS_CLASSES.label + Y.guid(); //get this unique id once then use

    /**
     * template that will contain the Dial's label.
     *
     * @property Dial.LABEL_TEMPLATE
     * @type {String}
     * @default &lt;div>...&lt;/div>
	 * @protected
     */
	Dial.LABEL_TEMPLATE = '<div id="' + labelId + '" class="' + Dial.CSS_CLASSES.label + '"><span class="' + Dial.CSS_CLASSES.labelString + '">{label}</span><span class="' + Dial.CSS_CLASSES.valueString + '"></span></div>';

	if(supportsVML === false){
		/**
		 * template that will contain the Dial's background ring.
		 *
		 * @property Dial.RING_TEMPLATE
		 * @type {String}
		 * @default &lt;div class="[...-ring]">&lt;div class="[...-northMark]">&lt;/div>&lt;/div>
		 * @protected
		 */
		Dial.RING_TEMPLATE = '<div class="' + Dial.CSS_CLASSES.ring + '"><div class="' + Dial.CSS_CLASSES.northMark + '"></div></div>';

		/**
		 * template that will contain the Dial's current angle marker.
		 *
		 * @property Dial.MARKER_TEMPLATE
		 * @type {String}
		 * @default &lt;div class="[...-marker] [...-marker-hidden]">&lt;div class="[...-markerUser]">&lt;/div>&lt;/div>
		 * @protected
		 */
		Dial.MARKER_TEMPLATE = '<div class="' + Dial.CSS_CLASSES.marker + ' ' + Dial.CSS_CLASSES.markerHidden + '"><div class="' + Dial.CSS_CLASSES.markerUser + '"></div></div>';

		/**
		 * template that will contain the Dial's center button.
		 *
		 * @property Dial.CENTER_BUTTON_TEMPLATE
		 * @type {String}
		 * @default &lt;div class="[...-centerButton]">&lt;div class="[...-resetString]">' + Y.substitute('{resetStr}', Dial.ATTRS.strings.value) + '&lt;/div>&lt;/div>
		 * @protected
		 */
		Dial.CENTER_BUTTON_TEMPLATE = '<div class="' + Dial.CSS_CLASSES.centerButton + '"><div class="' + Dial.CSS_CLASSES.resetString + '">{resetStr}</div></div>';

		/**
		 * template that will contain the Dial's handle.
		 *
		 * @property Dial.HANDLE_TEMPLATE
		 * @type {String}
		 * @default &lt;div class="[...-handle]">&lt;div class="[...-handleUser]" aria-labelledby="' + labelId + '" aria-valuetext="" aria-valuemax="" aria-valuemin="" aria-valuenow="" role="slider"  tabindex="0">&lt;/div>&lt;/div>';// title="{tooltipHandle}"
		 * @protected
		 */
		Dial.HANDLE_TEMPLATE = '<div class="' + Dial.CSS_CLASSES.handle + '"><div class="' + Dial.CSS_CLASSES.handleUser + '" aria-labelledby="' + labelId + '" aria-valuetext="" aria-valuemax="" aria-valuemin="" aria-valuenow="" role="slider"  tabindex="0" title="{tooltipHandle}"></div></div>';// title="{tooltipHandle}"
	
	}else{ // VML case
		Dial.RING_TEMPLATE = '<div class="' + Dial.CSS_CLASSES.ring +  ' ' + Dial.CSS_CLASSES.ringVml + '">'+
								'<div class="' + Dial.CSS_CLASSES.northMark + '"></div>'+
									'<v:oval strokecolor="#ceccc0" strokeweight="1px"><v:fill type=gradient color="#8B8A7F" color2="#EDEDEB" angle="45"/></v:oval>'+
									//'<v:oval></v:oval>'+
								'</div>'+
								'';
		Dial.MARKER_TEMPLATE = '<div class="' + Dial.CSS_CLASSES.marker + ' ' + Dial.CSS_CLASSES.markerHidden + '">'+
									'<div class="' + Dial.CSS_CLASSES.markerUserVml + '">'+
										'<v:oval stroked="false">'+
											'<v:fill opacity="20%" color="#000"/>'+
										'</v:oval>'+
									'</div>'+
									//'<v:oval></v:oval>'+
								'</div>'+
								'';
		Dial.CENTER_BUTTON_TEMPLATE = '<div class="' + Dial.CSS_CLASSES.centerButton + ' ' + Dial.CSS_CLASSES.centerButtonVml + '">'+
											'<v:oval strokecolor="#ceccc0" strokeweight="1px">'+
												'<v:fill type=gradient color="#C7C5B9" color2="#fefcf6" colors="35% #d9d7cb, 65% #fefcf6" angle="45"/>'+
												'<v:shadow on="True" color="#000" opacity="10%" offset="2px, 2px"/>'+
											'</v:oval>'+
											//'<v:oval></v:oval>'+
											'<div class="' + Dial.CSS_CLASSES.resetString + '">{resetStr}</div>'+
									'</div>'+
									'';
		Dial.HANDLE_TEMPLATE = '<div class="' + Dial.CSS_CLASSES.handle + '">'+
									'<div class="' + Dial.CSS_CLASSES.handleUserVml + '" aria-labelledby="' + labelId + '" aria-valuetext="" aria-valuemax="" aria-valuemin="" aria-valuenow="" role="slider"  tabindex="0" title="{tooltipHandle}">'+
										'<v:oval stroked="false">'+
											'<v:fill opacity="20%" color="#6C3A3A"/>'+
										'</v:oval>'+
									'</div>'+
									//'<v:oval></v:oval>'+
								'</div>'+
								'';
	}

    /* Dial extends the base Widget class */
    Y.extend(Dial, Widget, {

		/**
		 * creates the DOM structure for the Dial.
		 *
		 * @method renderUI
		 * @protected
		 */
        renderUI : function() {
			this._renderLabel();
			this._renderRing();
			this._renderMarker();
			this._renderCenterButton();
			this._renderHandle();
			
			if(supportsVML){
				this._setVMLSizes();
			}
			this._setBorderRadius();
			
			// object handles
			this.contentBox = this.get("contentBox");
			
			// constants
			this._centerX = this.get('diameter') / 2;
			this._centerY = this.get('diameter') / 2;
			this._handleDist = this._centerX * this.get('handleDist');
			this._originalValue = this.get('value');

			// variables
			this._timesWrapped = 0;
			this._angle = this._getAngleFromValue(this.get('value'));
			this._setTimesWrapedFromValue(this.get('value'));
			
			// init
			this._handleUserNode.set('aria-valuemin', this.get('min'));
			this._handleUserNode.set('aria-valuemax', this.get('max'));
        },

		/**
		 * Sets -webkit-border-radius to 50% of width/height of the ring, handle-user, marker-user, and center-button.
		 * This is needed for iOS 3.x.
		 * The objects render square if the radius is > 50% of the width/height
		 * @method _setBorderRadius
		 * @private
		 */
		_setBorderRadius : function(){
			// Fixme: Would this be a good thing to do for all browsers instead of relying on % dimensions in CSS?
			var dia = this.get('diameter');
			this._ringNode.setStyle('WebkitBorderRadius', Math.floor(dia * 0.5) + 'px');
			this._handleUserNode.setStyle('WebkitBorderRadius', Math.floor(dia * 0.1) + 'px');
			this._markerUserNode.setStyle('WebkitBorderRadius',  Math.floor(dia * 0.05) + 'px');
			this._centerButtonNode.setStyle('WebkitBorderRadius',  Math.floor(dia * 0.25) + 'px');
		},
		
		/**
		 * Creates the Y.DD.Drag instance used for the handle movement and
		 * binds Dial interaction to the configured value model.
		 *
		 * @method bindUI
		 * @protected
		 */
        bindUI : function() {
            this.after("valueChange", this._afterValueChange);

            var boundingBox = this.get("boundingBox"),

            // Looking for a key event which will fire continously across browsers while the key is held down.  
            keyEventSpec = (!Y.UA.opera) ? "down:" : "press:",
			keyLeftRightSpec = (!Y.UA.opera) ? "down:" : "press:";
			// 38, 40 = arrow up/down, 33, 34 = page up/down,  35 , 36 = end/home
            keyEventSpec += "38, 40, 33, 34, 35, 36";
			// 37 , 39 = arrow left/right
            keyLeftRightSpec += "37, 39";

            Y.on("key", Y.bind(this._onDirectionKey, this), boundingBox, keyEventSpec);
            Y.on("key", Y.bind(this._onLeftRightKey, this), boundingBox, keyLeftRightSpec);
			Y.on('mouseenter', Y.bind(this._dialCenterOver, this), this._centerButtonNode);
			Y.on('mouseleave', Y.bind(this._dialCenterOut, this), this._centerButtonNode);
			Y.on('click', Y.bind(this._resetDial, this), this._centerButtonNode);			
			Y.on('mousedown', Y.bind(function(){this._handleUserNode.focus();}, this), this._handleNode);			

			var dd1 = new Y.DD.Drag({
				node: this._handleNode,
				on : {
					'drag:drag' : Y.bind(this._handleDrag, this),
					'drag:start' : Y.bind(this._handleDragStart, this),
					'drag:end' : Y.bind(this._handleDragEnd, this)
				}
			});
		},

		/**
		 * Sets _timesWrapped based on Dial value
		 * to net integer revolutions the user dragged the handle around the Dial
		 *
		 * @method _setTimesWrapedFromValue
		 * @param val {Number} current value of the Dial
		 * @private
		 */
		_setTimesWrapedFromValue : function(val){
			if(val % this.get('stepsPerRev') === 0){
				this._timesWrapped = (val / this.get('stepsPerRev')) -1;
			}else{
				this._timesWrapped = Math.floor(val / this.get('stepsPerRev'));
			}
		},
		
		/**
		 * Sets the string in the object the user clicks to reset the Dial value
		 * 
		 * @method _dialCenterOver
         * @param e {DOMEvent} the mouseover event object
		 */
		_dialCenterOver : function(e){
			this._resetString.setContent(Y.substitute('{resetStr}', this.get('strings')));
		},
		
		/**
		 * Sets the string in the object the user clicks to reset the Dial value
		 * to ""
		 * 
		 * @method _dialCenterOut
         * @param e {DOMEvent} the mouseover event object
		 */
		_dialCenterOut : function(e){
			this._resetString.setContent(''); 
		},
		
		/**
		 * handles the user dragging the handle around the Dial, calculates the angle, 
		 * checks for wrapping around top center, handles exceeding min or max values 
		 *
		 * @method _handleDrag
         * @param e {DOMEvent} the drag event object
		 * @protected
		 */
		_handleDrag : function(e){
			var handleCenterX = e.pageX + this._handleUserNodeRadius,
			handleCenterY = e.pageY + this._handleUserNodeRadius;
			
			
			var ang = Math.atan( (this._centerYOnPage - handleCenterY)  /  (this._centerXOnPage - handleCenterX)  ) * (180 / Math.PI), 
			deltaX = (this._centerXOnPage - handleCenterX);
			if(deltaX < 0){
				ang = (ang + 90);
			}else{
				ang = (ang - 90);
			}
			// check for need to set timesWrapped
			if(handleCenterY < this._centerYOnPage){ //if handle is above the middle of the dial...
				if((this._prevX <= this._centerXOnPage) && (handleCenterX > this._centerXOnPage)){ // If wrapping, clockwise
					this._timesWrapped = (this._timesWrapped + 1);
				}else if((this._prevX > this._centerXOnPage) && (handleCenterX <= this._centerXOnPage)){ // if un-wrapping, counter-clockwise
					this._timesWrapped = (this._timesWrapped - 1);
				}
			}
			this._prevX = handleCenterX;
			var newValue = this._getValueFromAngle(ang); // This function needs the current _timesWrapped value
			// handle hitting max and min and going beyond, stops at max or min 
			//if((newValue > this.get('min')) && (newValue < this.get('max'))) {
			if((newValue > this.get('min')) && (newValue < this.get('max'))) {
				this.set('value', newValue);
			}else if(newValue > this.get('max')){
				this.set('value', this.get('max'));
			}else if(newValue < this.get('min')){
				this.set('value', this.get('min'));
			}
		},

		/**
		 * handles the user starting to drag the handle around the Dial
		 *
		 * @method _handleDragStart
         * @param e {DOMEvent} the drag event object
		 * @protected
		 */
		_handleDragStart : function(e){
			this._markerNode.removeClass(Dial.CSS_CLASSES.markerHidden);
			if(!this._prevX){
				this._prevX = this._handleNode.getX();
			}
			this._centerYOnPage = (this._ringNode.getY() + this._centerY);
			this._centerXOnPage = (this._ringNode.getX() + this._centerX);
		},

		/*
		 * When handle is handleDragEnd, this animates the return to the fixed dial
		 */		

		/**
		 * handles the end of a user dragging the handle, animates the handle returning to
		 * resting position.
		 *
		 * @method _handleDragEnd
		 * @protected
		 */
		_handleDragEnd : function(){
			var node = this._handleNode;			
				node.transition({
					duration: 0.08, // seconds
					easing: 'ease-in',
					left: this._setNodeToFixedRadius(this._handleNode, true)[0] + 'px',
					top: this._setNodeToFixedRadius(this._handleNode, true)[1] + 'px'
				}, Y.bind(function(){
						this._markerNode.addClass(Dial.CSS_CLASSES.markerHidden);
						this._prevX = this._handleNode.getX(); //makes us ready for next drag.
					}, this)
				);
			this._setTimesWrapedFromValue(this.get('value'));
		},

		/**
		 * returns the XY of the fixed position, handleDist, from the center of the Dial (resting position)
		 * The XY also represents the angle related to the current value
		 * If typeArray is true, [X,Y] is returned.
		 * If typeArray is false, the XY of the node passed is set.
		 *
		 * @method _setNodeToFixedRadius
		 * @param obj {Node}
		 * @param typeArray {Boolean} true returns an array [X,Y]
		 * @protected
		 * @return {Array} an array of [XY] is optionally returned
		 */
		 _setNodeToFixedRadius : function(obj, typeArray){
			var thisAngle = (this._angle - 90),
			rad = (Math.PI / 180),
			newY = Math.round(Math.sin(thisAngle * rad) * this._handleDist),
			newX = Math.round(Math.cos(thisAngle * rad) * this._handleDist),
			dia = parseInt(obj.getStyle('width'), 10);
			
			newY = newY - (dia * 0.5);
			newX = newX - (dia * 0.5);
			if(typeArray){ // just need the style for css transform left and top to animate the handle drag:end
				return [this._centerX + newX, this._centerX + newY];
			}else{
				obj.setStyle('left', (this._centerX + newX) + 'px');
				obj.setStyle('top', (this._centerX + newY) + 'px');
			}
		 },

		/**
		 * Synchronizes the DOM state with the attribute settings.
		 *
		 * @method syncUI
		 */
        syncUI : function() {
            this._uiSetValue(this.get("value"));
        },

		/**
		 * sets the sizes of ring, center-button, marker and handle VML ovals in pixels.
		 * Needed only in some IE versions 
		 * that ignore percent style sizes/offsets.
		 * so these must be set in pixels.
		 * Normally these are set in % of the ring.
		 *
		 * @method _setVMLSizes
		 * @protected
		 */
		_setVMLSizes : function(){
			var dia = this.get('diameter');
			var setSize = function(node, dia, percent){
			var suffix = 'px';
				node.getElementsByTagName('oval').setStyle('width', (dia * percent) + suffix);
				node.getElementsByTagName('oval').setStyle('height', (dia * percent) + suffix);
				node.setStyle('width', (dia * percent) + suffix);
				node.setStyle('height', (dia * percent) + suffix);
			};
			setSize(this._ringNode, dia, 1.0);
			setSize(this._handleNode, dia, 0.2);
			setSize(this._handleUserNode, dia, 0.2);
			setSize(this._markerNode, dia, 0.1);
			setSize(this._markerUserNode, dia, 0.1);
			setSize(this._centerButtonNode, dia, 0.5);
			this._handleUserNodeRadius = (dia * 0.1);
			this._markerUserNodeRadius = (dia * 0.05);
		},


		/**
		 * renders the DOM object for the Dial's label
		 *
		 * @method _renderLabel
		 * @protected
		 */
        _renderLabel : function() {
            var contentBox = this.get("contentBox"),
                label = contentBox.one("." + Dial.CSS_CLASSES.label);
            if (!label) {
				label = Node.create(Y.substitute(Dial.LABEL_TEMPLATE, this.get('strings')));
				contentBox.append(label);
            }
            this._labelNode = label;
			this._valueStringNode = this._labelNode.one("." + Dial.CSS_CLASSES.valueString);
        },

		/**
		 * renders the DOM object for the Dial's background ring
		 *
		 * @method _renderRing
		 * @protected
		 */
        _renderRing : function() {
            var contentBox = this.get("contentBox"),
                ring = contentBox.one("." + Dial.CSS_CLASSES.ring);
            if (!ring) {
                ring = contentBox.appendChild(Dial.RING_TEMPLATE);
				ring.setStyles({width:this.get('diameter') + 'px', height:this.get('diameter') + 'px'});
            }
            this._ringNode = ring;
        },

		/**
		 * renders the DOM object for the Dial's background marker which 
		 * tracks the angle of the user dragging the handle
		 *
		 * @method _renderMarker
		 * @protected
		 */
        _renderMarker : function() {
            var contentBox = this.get("contentBox"),
			marker = contentBox.one("." + Dial.CSS_CLASSES.marker);
            if (!marker) {
                marker = contentBox.one('.' + Dial.CSS_CLASSES.ring).appendChild(Dial.MARKER_TEMPLATE);
            }
            this._markerNode = marker;
			if(supportsVML === true){
				this._markerUserNode = this._markerNode.one('.' + Dial.CSS_CLASSES.markerUserVml);
			}else{
				this._markerUserNode = this._markerNode.one('.' + Dial.CSS_CLASSES.markerUser);
			}
			this._markerUserNodeRadius = parseInt(this._markerUserNode.getStyle('width'), 10) * 0.5;
        },
		
		/**
		 * places the centerbutton's reset string in the center of the button
		 * based on the size of the string object 
		 *
		 * @method _setXYResetString
		 * @protected
		 */
		_setXYResetString : function(){
			this._resetString.setStyle('top', (this._centerButtonNode.get('region').height / 2) - (this._resetString.get('region').height / 2) + 'px');
			this._resetString.setStyle('left', (this._centerButtonNode.get('region').width / 2) - (this._resetString.get('region').width / 2) + 'px');
		},

		/**
		 * renders the DOM object for the Dial's center
		 *
		 * @method _renderCenterButton
		 * @protected
		 */
        _renderCenterButton : function() {
            var contentBox = this.get("contentBox"),
                centerButton = contentBox.one("." + Dial.CSS_CLASSES.centerButton);
            if (!centerButton) {
				centerButton = Node.create(Y.substitute(Dial.CENTER_BUTTON_TEMPLATE, this.get('strings')));
                contentBox.one('.' + Dial.CSS_CLASSES.ring).append(centerButton);
            }
            this._centerButtonNode = centerButton;
			this._resetString = this._centerButtonNode.one('.' + Dial.CSS_CLASSES.resetString);
			this._setXYResetString(); // centering the reset string in the button
			this._resetString.setContent('');
			var offset = this.get('diameter') * 0.25;
			this._centerButtonNode.setStyle('left', (offset) + 'px');
			this._centerButtonNode.setStyle('top', (offset) + 'px');
		},

		/**
		 * renders the DOM object for the Dial's user draggable handle
		 *
		 * @method _renderHandle
		 * @protected
		 */
        _renderHandle : function() {
            var contentBox = this.get("contentBox"),
                handle = contentBox.one("." + Dial.CSS_CLASSES.handle);
            if (!handle) {
                handle = Node.create(Y.substitute(Dial.HANDLE_TEMPLATE, this.get('strings')));
                contentBox.one('.' + Dial.CSS_CLASSES.ring).append(handle);
            }
            this._handleNode = handle;
			if(supportsVML === true){
				this._handleUserNode = this._handleNode.one('.' + Dial.CSS_CLASSES.handleUserVml);
			}else{
				this._handleUserNode = this._handleNode.one('.' + Dial.CSS_CLASSES.handleUser);
			}
			this._handleUserNodeRadius = parseInt(this._handleUserNode.getStyle('width'), 10) * 0.5;
        },

        /**
         * sets the visible UI label string
		 *
		 * @method _setLabelString
		 * @param str {String}
		 * @protected
		 */
        _setLabelString : function(str) {
            this.get("contentBox").one("." + Dial.CSS_CLASSES.labelString).setContent(str);
        },

        /**
         * sets the visible UI label string
		 *
		 * @method _setResetString
		 * @param str {String}
		 * @protected
		 */
        _setResetString : function(str) {
			this.set('strings.resetStr', str);
            this.get("contentBox").one("." + Dial.CSS_CLASSES.resetString).setContent(str);
			this._setXYResetString(); // recenters the string in the button
			this._resetString.setContent('');
        },

        /**
         * sets the tooltip string in the Dial's handle
		 *
		 * @method _setTooltipString
		 * @param str {String}
		 * @protected
		 */
        _setTooltipString : function(str) {
            this._handleUserNode.set('title', str);
        },

		/**
		 * sets the Dial's value in response to key events.
		 * Left and right keys are in a separate method 
		 * in case an implementation wants to increment values
		 * but needs left and right arrow keys for other purposes.
		 *
		 * @method _onDirectionKey
		 * @param e {Event} the key event
		 * @protected
		 */
        _onDirectionKey : function(e) {
            e.preventDefault();
            switch (e.charCode) {
                case 38: // up
					this._incrMinor();
                    break;
                case 40: // down
					this._decrMinor();
                    break;
                case 36: // home
					this._resetDial();
                    break;
                case 35: // end
                    this._setToMax();
					break;
                case 33: // page up
					this._incrMajor();
                    break;
                case 34: // page down
                    this._decrMajor();
					break;
            }
        },

		/**
		 * sets the Dial's value in response to left or right key events
		 *
		 * @method _onLeftRightKey
		 * @param e {Event} the key event
		 * @protected
		 */
        _onLeftRightKey : function(e) {
            e.preventDefault();
            switch (e.charCode) {
                case 37: // left
					this._decrMinor();
                    break;
                case 39: // right
					this._incrMinor();
                    break;
            }
        },
		
		/**
		 * increments Dial value by a minor increment
		 *
		 * @method _incrMinor
		 * @protected
		 */
		_incrMinor : function(){
				var newVal = (this.get('value') + this.get("minorStep"));
				newVal = Math.min(newVal, this.get("max"));
				this.set('value', newVal.toFixed(this.get('decimalPlaces')) - 0);
		},
		
		/**
		 * decrements Dial value by a minor increment
		 *
		 * @method _decrMinor
		 * @protected
		 */
		_decrMinor : function(){
				var newVal = (this.get('value') - this.get("minorStep"));
				newVal = Math.max(newVal, this.get("min"));
				this.set('value', newVal.toFixed(this.get('decimalPlaces')) - 0);
		},
		
		/**
		 * increments Dial value by a major increment
		 *
		 * @method _incrMajor
		 * @protected
		 */
		_incrMajor : function(){
				var newVal = (this.get('value') + this.get("majorStep"));
				newVal = Math.min(newVal, this.get("max"));
				this.set('value', newVal.toFixed(this.get('decimalPlaces')) - 0);
		},
		
		/**
		 * decrements Dial value by a major increment
		 *
		 * @method _decrMajor
		 * @protected
		 */
		_decrMajor : function(){
				var newVal = (this.get('value') - this.get("majorStep"));
				newVal = Math.max(newVal, this.get("min"));
				this.set('value', newVal.toFixed(this.get('decimalPlaces')) - 0);
		},

		/**
		 * sets Dial value to dial's max attr
		 *
		 * @method _decrMajor
		 * @protected
		 */
		_setToMax : function(){
				this.set('value', this.get("max"));
		},		
		
		/**
		 * sets Dial value to dial's min attr
		 *
		 * @method _decrMajor
		 * @protected
		 */
		_setToMin : function(){
				this.set('value', this.get("min"));
		},		
		
		/**
		 * resets Dial value to the orignal initial value. 
		 *
		 * @method _resetDial
		 * @protected
		 */
		_resetDial : function(){
			this.set('value', this._originalValue);
			this._handleUserNode.focus();
		},
		
		/**
		 * returns the handle angle associated with the current value of the Dial
		 *
		 * @method _getAngleFromValue
		 * @param newVal {Number} the current value of the Dial
		 * @return {Number} the angle associated with the current Dial value
		 * @protected
		 */
		_getAngleFromValue : function(newVal){
			var nonWrapedPartOfValue = newVal % this.get('stepsPerRev');
			var angleFromValue = nonWrapedPartOfValue / this.get('stepsPerRev') * 360;
			return angleFromValue; 
		},

		/**
		 * returns the value of the Dial calculated from the current handle angle
		 *
		 * @method _getValueFromAngle
		 * @param angle {Number} the current angle of the Dial's handle
		 * @return {Number} the current Dial value corresponding to the handle position
		 * @protected
		 */
		_getValueFromAngle : function(angle){
			if(angle < 0){
				angle = (360 + angle);
			}else if(angle === 0){
				angle = 360;
			}
			var value = (angle / 360) * this.get('stepsPerRev');
			value = (value + (this._timesWrapped * this.get('stepsPerRev')));
			//return Math.round(value * 100) / 100;
			return value.toFixed(this.get('decimalPlaces')) - 0;
		},

		/**
		 * calls the method to update the UI whenever the Dial value changes
		 *
		 * @method _afterValueChange
		 * @param e {Event}
		 * @protected
		 */
        _afterValueChange : function(e) {
            this._uiSetValue(e.newVal);
        },

		/**
         * Updates the UI display value of the Dial to reflect 
         * the value passed in.
		 * Makes all other needed UI display changes
		 *
		 * @method _uiSetValue
		 * @param val {Number} value of the Dial
		 * @protected
		 */
        _uiSetValue : function(val) {
			this._angle = this._getAngleFromValue(val);
			if(this._handleNode.hasClass(Dial.CSS_CLASSES.dragging) === false){
				this._setTimesWrapedFromValue(val);
				this._setNodeToFixedRadius(this._handleNode, false);
				this._prevX = this._handleNode.getX();
			}
			this._valueStringNode.setContent(val); 
			this._handleUserNode.set('aria-valuenow', val);
			this._handleUserNode.set('aria-valuetext', val);
			this._setNodeToFixedRadius(this._markerNode, false);
			if((val === this.get('max')) || (val === this.get('min'))){
				if(this._markerUserNode.hasClass('marker-max-min') === false){
					this._markerUserNode.addClass('marker-max-min');
					if(supportsVML === true){
						this._markerUserNode.getElementsByTagName('fill').set('color', '#AB3232');
					}
				}
			}else{
				if(supportsVML === true){
					this._markerNode.getElementsByTagName('fill').set('color', '#000');
				}
				if(this._markerUserNode.hasClass('marker-max-min') === true){
					this._markerUserNode.removeClass('marker-max-min');
				}
			}
        },

		/**
         * value attribute default validator. Verifies that
         * the value being set lies between the min/max value
		 *
		 * @method _validateValue
		 * @param val {Number} value of the Dial
		 * @protected
		 */
        _validateValue: function(val) {
            var min = this.get("min"),
                max = this.get("max");
            return (Lang.isNumber(val) && val >= min && val <= max);
        }
    });
	Y.Dial = Dial;



}, '3.3.0' ,{requires:['widget', 'dd-drag', 'substitute', 'event-mouseenter', 'transition', 'intl'], skinnable:true, lang:['en','es' ]});