@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
graphicSpace = (Graphics2D) g;
graphicSpace.setRenderingHint(
RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
// something to draw
if (!dataPoints.isEmpty()) {
// Step 1: create data model
createDataPoints();
// Step 2: draw
drawDots();
drawAxes();
drawLinesBetweenDataPoints();
} else {
graphicSpace.drawString("No data available!", (PANEL_WITDH / 2) - 40, PANEL_HIGTH / 2);
}
}
