Fundamentals of Computational Visual Form (Fall 2008)

Code

//Note: After much time spent on trying to get this to work, I had to stop
//I can't figure out why I keep getting a null pointer exception and can only assume
//that somewhere I haven't looked, one of my values are null when they shouldn't 
//Note2: My backspace function works except that, 
//it does not remove the last letter, but instead replaces the last
//letter with the next inputted letter
//Note3: if for some reason you wanted to use all caps,
//the search query would not fit in the rectangle, but then again
//I'm not sure if caps work or not since a println results in ?X
//(where X is the capital letter), rather than X
//in addition spaces can be typed but I doubt they work with Twitter

// THE CONCEPT:
// TYPE A WORD, SEARCH FOR CURRENT TWEETS WITH THAT WORD.
PFont myfont;
int letterCount = 0;
char letterArray[] = new char[20];
String query = " ";
String queryUrl = " ";
String result[];
String finresult[];
boolean z = false;
//----------------
void keyPressed(){
  if (key == 10){ // the Enter key!
    doTwitterSearchFromLetterArray();
    z = true;
  } 
  else if (key == 8){
    if (letterCount > 0){
      int lc = letterCount;
      query = query.substring(0,lc);
      letterCount = query.length()-1;
      for (int i = query.length()-1; i < letterArray.length; i++){
        if (i >= 1)
          letterArray[i] = ' ';
      }
    }
  }
  else {
    if (letterCount < 20){
      letterArray[letterCount] = key;
      query = query.valueOf(letterArray);
      letterCount++;
    }
    else if (letterCount == 20){
      letterCount = 0;
      for (int i = 0; i < letterArray.length; i++){
        letterArray[i] = ' ';
      }
    }
  }
}

//----------------
void setup(){
  size (640, 480);
  myfont = loadFont("TimesNewRomanPSMT-24.vlw");
  textFont(myfont);
}

//----------------
void draw(){
  background (100);
  fill (200, 200);
  rect (45,30, 250, 30);
  fill (255);
  text (query, 50, 50);
  if (z == true){
    for (int a = 0; a < 11; a++){
      text (finresult[a], 50, 100 + a*20);
    }
  }
}

//----------------
void doTwitterSearchFromLetterArray(){
  // Using the letterArray, create a String similar to the following
  // (but instead of "purple", use the search typed in by the user).
  // String queryUrl = "http://search.twitter.com/search.rss?rpp=100&q=purple";
  // Note: the "rpp=100" portion allows you to specify that you want up to 100 results.
  // ...
  query = query.trim();
  //println (query);
  queryUrl = "http://search.twitter.com/search.rss?rpp=100&q=" + query;
  modifiedex70x();

}

//--------------
void modifiedex70x(){
  String[] strArray = loadStrings(queryUrl);
  String result[] = new String[strArray.length];
  int n = 0;

  for (int i = 0; i < strArray.length; i++) {
    if (result[i] != null){  
      result[i] = result[i].trim();
      if (result[i].startsWith("<title>")) {
        String pref = "<title>";
        String suf = "</title>";
        int preflen = pref.length();
        int suflen = suf.length();
        if (n < 11) {
          finresult[n] = result[i].substring(preflen, result[i].length()-suflen);
          n++;
        }
      }
    }
  }
}