Create a PDF file with mouse press

PDF_Example_02.pde

import processing.pdf.*;  // Import PDF code

boolean recordPDF = false;
int count = 0;

void setup() {
  size(600, 600);
}

void draw() {
  if (recordPDF) {
    beginRecord(PDF, "line" + nf(count, 4) + ".pdf");  // Start writing to PDF
  }
  // START PATTERN
  background(255); 
  strokeWeight(10);
  for (int y = 100; y < height; y += 100) {                
    line(mouseX, y, mouseX+200, y);  // Draw lines to screen and to PDF
  }
  // STOP PATTERN
  if (recordPDF) {
    endRecord();  // Stop writing to PDF
    recordPDF = false;
    count = count + 1;
  }
}

void mousePressed() {
  recordPDF = true;
}