Getting paintComponent elements of a JPanel to work with another JPanel inside of it

Vote count:

0

I have a JPanel with a simple animated snow particle effect inside of a JFrame, and it works from on its own. But when I try and add another JPanel to it, it makes the effect of the snow stop. Can anyone help me with this? Is it a problem with layering, or something? Or is it an issue with my Layout Managers?

My Code: package christmasfinal;

import java.awt.*;
import javax.swing.*;

public class ChristmasFinal extends JApplet {

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        TreePanel treePanel = new TreePanel();
        frame.setSize(550, 420);
        SnowBackgroundPanel snowPanel = new SnowBackgroundPanel(frame.getWidth(),    frame.getHeight());
        treePanel.setSize(200, 320);
        snowPanel.setSize(frame.getWidth(), frame.getHeight());
        snowPanel.setLayout(new BorderLayout());
        frame.setLayout(new BorderLayout());
        frame.add(snowPanel, BorderLayout.CENTER);
        snowPanel.add(treePanel, BorderLayout.CENTER);
        System.out.println(treePanel.getWidth() + " " + treePanel.getHeight());

        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
        frame.setTitle("Christmas Final");
    }

}


package christmasfinal;

import javax.swing.*;
import java.awt.*;

public class TreePanel extends JPanel{

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        int[] treeX = {getWidth()/2, getWidth()/2-20, getWidth()/2-60, getWidth()/2-20,
        getWidth()/2-40, getWidth()/2-80, getWidth()/2-20, getWidth()/2-60, getWidth()/2-100,
        getWidth()/2+100,getWidth()/2+60, getWidth()/2+20, getWidth()/2+80,
        getWidth()/2+40, getWidth()/2+20, getWidth()/2+60, getWidth()/2+20, getWidth()/2};

        int[] treeY = {getHeight()/2-120, getHeight()/2-80, getHeight()/2-40, getHeight()/2-40,
        getHeight()/2-20, getHeight()/2, getHeight()/2, getHeight()/2+40, getHeight()/2+60,
        getHeight()/2+60, getHeight()/2+40, getHeight()/2, getHeight()/2, getHeight()/2-20,
        getHeight()/2-40, getHeight()/2-40, getHeight()/2-80, getHeight()/2-120};

        g.setColor(Color.GREEN);
        g.fillPolygon(treeX, treeY, treeX.length);
        g.setColor(new Color(102, 51, 0));
        g.fillRect(getWidth()/2-20, getHeight()/2+60, 40, 40);
    }
}

package christmasfinal;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Random;
import java.math.*;

public class SnowBackgroundPanel extends JPanel{
    Random rand = new Random();

    //Create ArrayList for SnowParticles
    ArrayList<SnowParticle> snow = new ArrayList();

    //Create animation timer
    Timer timer = new Timer(7, new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            repaint();
        }
    });



    public SnowBackgroundPanel(int width, int height){
        setSize(width, height);
        System.out.println(getHeight() + " " + getWidth());
        for(int i=0; i<50; i++){
            snow.add(new SnowParticle());
            snow.get(i).x = rand.nextInt(getWidth()+1);
            snow.get(i).y = 0-rand.nextInt(getHeight()+1);
        }
        timer.start();

}
    @Override
    public void paintComponent(Graphics g){
        super.paintComponent(g);
        g.setColor(Color.WHITE);

        //Set, paint, and move snow particles
        for(int i=0; i<50; i++){
            g.fillOval(snow.get(i).x, snow.get(i).y, 10, 10);
            snow.get(i).y += 1;
            if(snow.get(i).y > getHeight()){
                snow.get(i).x = rand.nextInt(getWidth()+1);
                snow.get(i).y = 0-rand.nextInt(getHeight()+1);
            }
        }
    }
}

asked 53 secs ago

Grayson Erickson

1

Getting paintComponent elements of a JPanel to work with another JPanel inside of it