XMLYahooWeather: Update for latest API

Fixes shiffman#200.

chp18_data/example_18_06_XMLYahooWeather/example_18_06_XMLYahooWeather.pde

@@ -1,7 +1,7 @@
 /**
  * Loading XML Data
- * by Daniel Shiffman.  
- * 
+ * by Daniel Shiffman.
+ *
  * This example demonstrates how to use loadXML()
  * to retrieve data from an XML document via a URL
  */
@@ -10,24 +10,35 @@
 int temperature = 0;
 // We're going to store text about the weather
 String weather = "";
+// We're going to store the location name
+String city = "";
 
-// The zip code we'll check for
-String zip = "10003";
+// The woeid (where on earth id) we'll check for.
+// Search for "woeid lookup" to find your own.
+String woeid = "638242";
+
+PFont font;
 
 void setup() {
-  size(200, 200);
+  size(600, 360);
+
+  font = createFont("Merriweather-Light.ttf", 28);
+  textFont(font);
 
   // The URL for the XML document
-  String url = "http://xml.weather.yahoo.com/forecastrss?p=" + zip;
+  String url = "http://query.yahooapis.com/v1/public/yql?format=xml&q=select+*+from+weather.forecast+where+woeid=" + woeid + "+and+u='C'";
+  println(url);
 
   // Load the XML document
   XML xml = loadXML(url);
 
-  // Grab the element we want
-  XML forecast = xml.getChild("channel/item/yweather:forecast");
+  // Grab the elements we want
+  XML location = xml.getChild("results/channel/yweather:location");
+  XML forecast = xml.getChild("results/channel/item/yweather:condition");
 
   // Get the attributes we want
-  temperature = forecast.getInt("high");
+  city = location.getString("city");
+  temperature = forecast.getInt("temp");
   weather = forecast.getString("text");
 }
 
@@ -36,8 +47,8 @@ void draw() {
   fill(0);
 
   // Display all the stuff we want to display
-  text("Zip code: " + zip, 10, 50);
-  text("Today’s high: " + temperature, 10, 70);
-  text("Forecast: " + weather, 10, 90);
-}
+  text("Location: " + city, width*0.15, height*0.33);
+  text("Today’s high: " + temperature, width*0.15, height*0.5);
+  text("Forecast: " + weather, width*0.15, height*0.66);
 
+}