function MyApplication10() { }

MyApplication10.prototype = {

    Initialize: function(plugIn, userContext, rootElement)
    {
        this.plugIn = plugIn;
        
        // Get and store object references
        this.txtLocation = rootElement.FindName("txtLocation");
        this.txtDate = rootElement.FindName("txtDate");
        this.txtConditionsLabel = rootElement.FindName("txtConditionsLabel");
        this.txtConditions = rootElement.FindName("txtConditions");
        this.txtForecastLabel = rootElement.FindName("txtForecastLabel");
        this.cnvForecast = rootElement.FindName("cnvForecast");
        this.ellSpinner = rootElement.FindName("ellSpinner");
    },
    
    FetchData: function(zip, units)
    {
        this.ellSpinner.Visibility = "Visible";
    
        this.Clear();
        
        this.txtLocation.Text = "Loading...";
        
        var queryString = "?p=" + encodeURI(zip) + "&u=" + encodeURI(units);
        var url = "../../../assets/weather.php" + queryString;
    	var request = YAHOO.util.Connect.asyncRequest(
    	        "GET", url, { scope:this, success:this.DataReceived, failure:this.DataFailed });
    },
    
    DataReceived: function(result)
    {
        this.ellSpinner.Visibility = "Collapsed";
    
        var root = result.responseXML.documentElement;
        
        if(root != null)
        {
            try
            {
                this.txtLocation.Text 
                    = root.getElementsByTagName("description")[0].firstChild.nodeValue;
                this.txtDate.Text
                    = root.getElementsByTagName("lastBuildDate")[0].firstChild.nodeValue;
                this.txtConditionsLabel.Text = "Current Conditions:";
                
                var nodeUnits = getElementsByTagNameNS("yweather", "units", root)[0];
                var nodeCondition = getElementsByTagNameNS("yweather", "condition", root)[0];
                this.txtConditions.Text = nodeCondition.getAttribute("text") + ", " 
                            + nodeCondition.getAttribute("temp")
                            + nodeUnits.getAttribute("temperature");

                this.txtForecastLabel.Text = "Forecast:";
                
                // Remove any existing forecast info
                this.cnvForecast.Children.Clear();
                
                // Loop all forecast items and dynamically create content
                var forecasts = getElementsByTagNameNS("yweather", "forecast", root);
                var nodeForecast;
                var txtForecast;
                var index;
                
                for(index = 0; index < forecasts.length; index++)
                {
                    nodeForecast = forecasts[index];
                    txtForecast = this.plugIn.Content.CreateFromXaml(
                                '<TextBlock FontFamily="Arial" FontSize="14" Canvas.Top="' 
                                    + (index * 20) +'" Text="' 
                                    + nodeForecast.getAttribute("day") + " - "
                                    + nodeForecast.getAttribute("text")
                                    + ". High: " + nodeForecast.getAttribute("high")
                                    + " Low: " + nodeForecast.getAttribute("low") + '"/>');
                    this.cnvForecast.Children.Add(txtForecast);
                }
                
            }
            catch(e)
            {
                this.ShowError("ERROR: Error parsing data: " + e.message);
            }
        }
        else
        {
            // Clear any previous result and show error message
            this.ShowError("ERROR: Could not retrieve data.");
        }
    },

    DataFailed: function(result)
    {
        this.ellSpinner.Visibility = "Collapsed";
    
        // Clear any previous result and show error message
        this.ShowError("ERROR: " + result.status + " " + result.statusText);
    },
    
    Clear: function()
    {
        this.txtLocation.Text = "";
        this.txtDate.Text = "";
        this.txtConditionsLabel.Text = "";
        this.txtConditions.Text = "";
        this.txtForecastLabel.Text = "";
        this.cnvForecast.Children.Clear();
    },
    
    ShowError: function(message)
    {
        this.Clear();
        this.txtLocation.Text = message;
    }
}