//Read-write utilities for polyloops
// by Jarek Rossignac
// with help from Rob Hudson for file browsing

void writePts() { for (int i=0; i<vn; i++) {P[i].write();};};
void writeNewPts() { println(); println(svn+" points:"); for (int i=0; i<svn; i++) {C[i].write();};};

/*methods for saving/loading a .pts file to a chosen destination*/
void saveBrowser() {  //open a file browser save a .pts file
  JFileChooser browser = new JFileChooser();
  int returnVal = browser.showSaveDialog(null);
  String saveFile = null;
  if(returnVal == JFileChooser.APPROVE_OPTION) {  //did you click 'save' or 'cancel'?
    try {
      saveFile = browser.getSelectedFile().getCanonicalPath(); //we want the full path name of file
    } catch (IOException ioe) { } catch (Exception e) { /*some other error occured*/ };
    if (saveFile != null) {  //sometimes it pays to be redundant...
      savePts(saveFile);
    }
  }
}

void loadBrowser() {  //the user wants to load in a file now...
  JFileChooser browser = new JFileChooser();
  int returnVal = browser.showOpenDialog(null);
  String loadFile = null;
  if(returnVal == JFileChooser.APPROVE_OPTION) {  //did you click 'open' or 'cancel'?
    try {
      loadFile = browser.getSelectedFile().getCanonicalPath();  //we want the full path name of the file
    } catch (IOException ioe) { } catch (Exception e) { /*some other error occured*/ }; 
    if (loadFile != null) {  //sometimes it pays to be redundant...
      loadPts(loadFile);
    }
  }  
}
/*end of added methods*/

/* had to slightly edit savePts and loadPts function to take in the destination file name */
void savePts(String fullFileName) {
  String [] inppts = new String [xvn+1];
  int s=0; 
  if (saveNew) { inppts[s++]=str(xvn); for (int i=0; i<xvn; i++) {inppts[s++]=str(C[i].x)+","+str(C[i].y);};}
  else {inppts[s++]=str(xvn); for (int i=0; i<xvn; i++) {inppts[s++]=str(P[i].x)+","+str(P[i].y);};}
  try {  //Processing's 'saveStrings' function sucks because it only works with the sketch directory!
    BufferedWriter bw = new BufferedWriter(new FileWriter(fullFileName)); //first we need a writer!
    for (int w=0; w<=xvn; w++) {bw.write(inppts[w], 0, (inppts[w]).length()); bw.newLine(); }
    bw.flush();  //make sure all bytes are written
    bw.close();  //save final changes to file
  } catch (IOException e) { println("an error occured while saving file: " + fullFileName); };
  };
 
void loadPts(String fullFileName) {
  String [] ss = loadStrings(fullFileName);
  String subpts;
  int s=0;
  int comma;
  vn = int(ss[s]);
  for(int i=0;i<vn; i++) {
      comma=ss[++s].indexOf(',');
      P[i]=new pt (float(ss[s].substring(0, comma)), float(ss[s].substring(comma+1, ss[s].length())));
    };
  };