GuruBlog

The following processing code shows how to resize a processing window from your code. the resizeApp methdo calculates the difference between the frame size and the size of the actual drawing area and adds it to the new size. then the application-frame is resized.

void setup() {
  size(320,200);
}

int col = 0;

void draw() {
  background(col);
  stroke(255,0,0);
  line(0,0,width, height);
  line(0,height,width,0);
}

void mousePressed() {
  if (col == 0) {
    resizeApp( 640, 400 );
    col = 255;
  } else {
    resizeApp( 320, 200 );
    col = 0;
  }
}

void keyPressed() {
  exit();
}

void resizeApp( int w, int h ) {
  int delta = frame.getHeight()-height;
   resize( w, h );
   frame.setSize( w, h + delta );
}