/** If a key is pressed perform the respective actions */
public void keyPressed() {
// Add 'stems' to the balls
if (keyCode == SHIFT) {
stems = !stems;
for (int i = 0; i < balls.size(); i++) {
Ball b = (Ball) balls.get(i);
b.STEM = stems;
}
}
// toggle repaint background
else if (key == 'b') REPAINT = !REPAINT;
// Empty the ArrayList of Balls
else if (key == 'x') balls.clear();
// Add a ball
else if (key == 'f') addBall();
}
/** Add a ball to the ArrayList at current mouse position */
public void addBall() {
// Store current mouse position
x1 = mouseX;
y1 = mouseY;
// Get a random offset for the ball
int xDiff = (int) random(-10, 10);
int yDiff = (int) random(-10, 10);
// Add the mouse's (x,y) and the random offset
int x = mouseX + xDiff;
int y = mouseY + yDiff;
// Create new ball
Ball b = new Ball(x, y, ballSize);
b.STEM = stems;
b.attract = kelly;
balls.add(b);
}