protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
int w = getWidth();
int h = getHeight();
// Draw ordinate.
g2.draw(new Line2D.Double(Points, Points, Points, h - Points));
// Draw abcissa.
g2.draw(new Line2D.Double(Points, h - Points, w - Points, h - Points));
// Draw labels.
Font font = g2.getFont();
FontRenderContext frc = g2.getFontRenderContext();
LineMetrics lm = font.getLineMetrics("0", frc);
float sh = lm.getAscent() + lm.getDescent();
// Ordinate label.
String s = "Strecke";
float sy = Points + ((h - 2 * Points) - s.length() * sh) / 2 + lm.getAscent();
for (int i = 0; i < s.length(); i++) {
String letter = String.valueOf(s.charAt(i));
float sw = (float) font.getStringBounds(letter, frc).getWidth();
float sx = (Points - sw) / 2;
g2.drawString(letter, sx, sy);
sy += sh;
}
// Abcissa label.
s = "Datum";
sy = h - Points + (Points - sh) / 2 + lm.getAscent();
float sw = (float) font.getStringBounds(s, frc).getWidth();
float sx = (w - sw) / 2;
g2.drawString(s, sx, sy);
// Draw lines.
double xInc = (double) (w - 2 * Points) / (data.length - 1);
double scale = (double) (h - 2 * Points) / getMax();
g2.setPaint(Color.green.darker());
for (int i = 0; i < data.length - 1; i++) {
double x1 = Points + i * xInc;
double y1 = h - Points - scale * data[i];
double x2 = Points + (i + 1) * xInc;
double y2 = h - Points - scale * data[i + 1];
g2.draw(new Line2D.Double(x1, y1, x2, y2));
}
// Mark data points.
g2.setPaint(Color.red);
for (int i = 0; i < data.length; i++) {
double x = Points + i * xInc;
double y = h - Points - scale * data[i];
g2.fill(new Ellipse2D.Double(x - 2, y - 2, 4, 4));
}
}
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHint(
RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
Font font = g2.getFont();
FontRenderContext frc = g2.getFontRenderContext();
float y = PAD;
for (int j = 0; j < data.length; j++) {
for (int k = 0; k < data[j].length; k++) {
String s = data[j][k];
LineMetrics lm = font.getLineMetrics(s, frc);
float x = PAD + offsets[j][k];
y += lm.getAscent();
g2.drawString(s, x, y);
y += lm.getDescent();
}
}
}