Page 229 - CTS - CSA TP - Volume 2

COMPUTER SOFTWARE APPLICATION - CITS

private ArrayList<Shape> lines = new ArrayList<>();
private Shape currentLine;
private int startX, startY;

public LineDrawingGUI() {

setTitle(“Line Drawing”);
setSize(500, 500);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

JPanel drawingPanel = new JPanel() {
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
drawLines(g);
}

};

drawingPanel.addMouseListener(new MouseAdapter() {
@Override

public void mousePressed(MouseEvent e) {
startX = e.getX();
startY = e.getY();
}

@Override
public void mouseReleased(MouseEvent e) {
createLine(startX, startY, e.getX(), e.getY());
repaint();
}

});

add(drawingPanel);
}

private void drawLines(Graphics g) {
Graphics2D g2d = (Graphics2D) g;
g2d.setColor(Color.RED);

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CITS : IT & ITES - Computer Software Application - Exercise 119 CITS : IT & ITES - Computer Software Application - Exercise 119