Thread: Help regarding GeneralPath

Hi,

I've been having some computer graphics lectures recently where we start off with 2D. I am able to draw certain shapes with the drawLine-method in paint, but I am still unable to have any visual content other than the background color when I draw a few lines. The code below is real simple and I have been trying to figure out what's wrong with it for hours now and I'd really appreciate some feedback.

Problem is
- I can't get the two lines printed
- I don't understand what's wrong with the code
- I'm sleepy

public class generalpathtest extends JApplet{
 
	public static void main (String[]args) {
		JFrame frame = new JFrame();
		frame.setTitle("GeneralPath");
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		JApplet applet = new generalpathtest();
		applet.init();
		frame.getContentPane().add(applet);
		frame.pack();
		frame.setVisible(true);
	}
 
	public void init() {
		JPanel panel = new generalpanel();
		getContentPane().add(panel);
	}
}
 
class generalpanel extends JPanel {
 
	public generalpanel() {
		setBackground(Color.white);
		setPreferredSize(new Dimension(300,400));
	}
 
	public void paintCompontent(Graphics g) {
		super.paintComponent(g);
		Graphics2D g2 = (Graphics2D)g;
		GeneralPath path = new GeneralPath(GeneralPath.WIND_NON_ZERO);
		g2.setColor(Color.black);
 
		float w = 500, h = 500;
 
		float x1 = 0.0f*w;	float y1 = 0.0f*h;
		float x2 = 0.5f*w;	float y2 = 0.5f*h;
		float x3 = 0.2f*w;	float y3 = 0.1f*h;
 
		path.moveTo(x1, y1);
		path.lineTo(x2, y2);
		path.lineTo(x3, y3);
		path.closePath();
 
		g2.draw(path);
		g2.translate(120, 120);
		g2.fill(path);
	}
}

regards
Ole Martin

Figured it out. It was caused by a tiny, yet fatal error in the paintComponent method name. It said "paintCompontent".

Hello olemagro.

Welcome to the forums. I'm glad you resolved your issue!