//String wpArticle = "Josef_Albers";
String wpArticle = "Walter_Gropius";
//String wpArticle = "Processing_(programming_language)";

String yqlApiUrl = "http://query.yahooapis.com/v1/public/yql";
String query = "SELECT%20*%20FROM%20geo.placemaker%20WHERE%20documentURL%3D%22http%3A%2F%2Fen.wikipedia.org%2Fwiki%2F" + wpArticle + "%22%20AND%20documentType%3D%22text%2Fhtml%22";
String format = "xml";
String restUrl = yqlApiUrl + "?q=" + query + "&format=" + format;

ArrayList placeMarkers = new ArrayList();

void setup() {
  size(250, 150);
  smooth();
  
  queryAndCreatePlaces();
}

void draw() {
  background(250);
  
  for (int i = 0; i < placeMarkers.size(); i++) {
    PlaceMarker pm = (PlaceMarker) placeMarkers.get(i);
    pm.display();
  }
}

void queryAndCreatePlaces() {
  XMLElement xmlResponse = new XMLElement(this, restUrl);
  
  XMLElement[] placeXMLElements = xmlResponse.getChildren("results/matches/match/place");
  println("Found " + placeXMLElements.length + " places");
  
  for (int i = 0; i < placeXMLElements.length; i++) {
    String name = placeXMLElements[i].getChild(2).getContent();
    float lat = new Float(placeXMLElements[i].getChild(3).getChild(0).getContent());
    float lng = new Float(placeXMLElements[i].getChild(3).getChild(1).getContent());
    
    PlaceMarker placeMarker = new PlaceMarker(name, lat, lng);
    placeMarkers.add(placeMarker);

    println(i + ": " + placeMarker);  
  }
}