public void paintComponent(Graphics g) {
super.paintComponent(g);
calcSizes();
drawAxes(g);
calcMaxes();
calcTickIncrements();
drawXTicks(g);
drawYTicks(g);
int t = 0;
int prevX = 0, prevY1 = 0, prevY2 = 0;
for (DataPair pair : data) {
int h = pair.getH();
int p = pair.getP();
// calculate where to put the dots
int x = xVal(t, maxT);
int y1 = yVal(h, maxH);
int y2 = yVal(p, maxP);
// draw herbivore dot
g.setColor(Color.BLUE);
g.fillOval(x, y1, 2 * r, 2 * r);
// draw a line connecting this dot to the last
if (prevX != 0) {
g.drawLine(prevX + r, prevY1 + r, x + r, y1 + r);
}
// draw predator dot
g.setColor(Color.RED);
g.fillOval(x, y2, 2 * r, 2 * r);
// draw a line connecting this dot to the last
if (prevX != 0) {
g.drawLine(prevX + r, prevY2 + r, x + r, y2 + r);
}
// remember these dots
prevX = x;
prevY1 = y1;
prevY2 = y2;
g.setColor(Color.BLACK);
t++;
}
}
private void calcMaxes() {
maxH = -1;
maxP = -1;
maxT = -1;
for (DataPair pair : data) {
int h = pair.getH();
int p = pair.getP();
if (h > maxH) maxH = h;
if (p > maxP) maxP = p;
maxT++;
}
}