no paint() ???

[Rick Gentry]

I've created a new extension of the JComponent class and paint() isn't being called when it's run and repaint() doesn't do anything either. Any suggestions? I'll put in the code if someone feels like taking a look.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
class XMasTree extends JComponent
{
int arrayX[] = {0,0,0,0,0,0,0,0,0,0,0}, arrayY[] = {0,0,0,0,0,0,0,0,0,0,0};
int nPoints = 11, scaleX = 5, scaleY = 7, baseX, baseY;
double growthFactor = 1.10, currentGrowth = 1;
Polygon leaves;
Rectangle trunk;

public XMasTree(int x, int y)
{
baseX = x;
baseY = y;

while(currentGrowth<=3)
{
repaint();
leaves();
currentGrowth *= growthFactor;
}
}

public void paint(Graphics g)
{
System.out.println("works");
Graphics2D g2 = (Graphics2D)g;
g2.setColor(Color.green);
g2.fillPolygon(leaves);
g2.setColor(Color.gray);
g2.fillRect(baseX-4,baseY,8,8);
}

public void leaves()
{
arrayX[1] = baseX;
arrayY[1] = baseY - scaleY;

arrayX[2] = (-3*baseX)/5;
arrayY[2] = (-4*baseY)/7;

arrayX[3] = (-2*baseX)/5;
arrayY[3] = (-4*baseY)/7;

arrayX[4] = (-4*baseX)/5;
arrayY[4] = (-2*baseY)/7;

arrayX[5] = (-3*baseX)/5;
arrayY[5] = (-2*baseY)/7;

arrayX[6] = baseX-scaleX;
arrayY[6] = baseY;

arrayX[7] = baseX+scaleX;
arrayY[7] = baseY;

arrayX[8] = (3*baseX)/5;
arrayY[8] = (-2*baseY)/7;

arrayX[9] = (4*baseX)/5;
arrayY[9] = (-2*baseY)/7;

arrayX[10] = (2*baseX)/5;
arrayY[10] = (-4*baseY)/7;

arrayX[0] = (3*baseX)/5;
arrayY[0] = (-4*baseY)/7;

leaves = new Polygon(arrayX, arrayY, nPoints);
}
}
public class Tree
{
public static void main(String args[])
{
JFrame frame = new JFrame("Growing Tree");
Container c = frame.getContentPane();
frame.setSize(800,600);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
c.add(new XMasTree(400,300));
}
}

[ December 14, 2002: Message edited by: Rick Gentry ]

[Marilyn de Queiroz]

public class Tree
{
    public static void main( String args[] )
    {
        JFrame frame = new JFrame("Growing Tree");      
        Container c = frame.getContentPane();
        c.add( new XMasTree(400,300) );
        frame.setSize(800,600);     
        frame.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );       
        frame.setVisible(true);     
    }
}

I suggest you move your c.add( ... ) to before you call the frame.setVisible().

[Rick Gentry]

Thanks, but I already figured that one out by myself. It all works now.