Scrolling Around Large, Complex Image

Question

The problem I am trying to solve is straitforward: I will be drawing a complicated graphic out of tens of thousands of individual small lines and circles. This graphic will need to be several thousand pixels wide and tall, so to be able to see all of it I will need to scroll around the image. I have been thrashing for hours trying to figure this out, but I really don't think it should be so complicated. I have posted the unsuccessful code I have so far below, but I am very much open to better approaches that don't use the framework I've laid out here.
Thanks for your help,
- Mark McG.
import java.awt.*;
import javax.swing.*;
public class DrawingTest {
JFrame frame;
Container content_pane;
public static void main(String[] args) {
new DrawingTest();
DrawingTest() {
Container content_pane;
JComponent my_component;
JScrollBar oneJScrollBar;
int frameWidth = 500;
int frameHeight = 500;
frame = new JFrame();
frame.setSize(frameWidth, frameHeight);
content_pane = frame.getContentPane();
oneJScrollBar = new JScrollBar(JScrollBar.HORIZONTAL);
content_pane.add(oneJScrollBar, BorderLayout.NORTH);
my_component = new MyComponent();
content_pane.add(my_component);
frame.setVisible(true);
class MyComponent extends JComponent {
public void paint(Graphics g) {
// Draw an oval bigger than the window
g.drawOval(0, 0, 3000, 2000);
}

Answer 1

I get a feeling that I have been conned! One of my standard demos is not quite what you want but I'm sure you can adapt it
import javax.swing.*;
import java.awt.*;
public class Test060202a extends JFrame
    class TestLabel extends JLabel
        TestLabel(String value)
            super(value, JLabel.CENTER);
            setFont(getFont().deriveFont(24.0f));
    public Test060202a()
        super("Tablet Test");
        JLabel north = new TestLabel("North");
        JLabel south = new TestLabel("South");
        JLabel east = new TestLabel("East");
        JLabel west = new TestLabel("West");
        getContentPane().add(north, BorderLayout.NORTH);
        getContentPane().add(east, BorderLayout.EAST);
        getContentPane().add(south, BorderLayout.SOUTH);
        getContentPane().add(west, BorderLayout.WEST);
        getContentPane().setPreferredSize(new Dimension(512, 512));
        Tablet tablet = new Tablet();       
        JScrollPane scroller = new JScrollPane(tablet);
        getContentPane().add(scroller, BorderLayout.CENTER);
        pack();
    public static void main(String[] args)
        Test060202a tester = new Test060202a();
        tester.setVisible(true);
    class Tablet extends JComponent
        Tablet()
            setPreferredSize(new Dimension(4096, 4096));
            setBackground(Color.cyan);
        public void paintComponent(Graphics g)
            super.paintComponent(g);
            Color savedColor = g.getColor();
            g.setColor(getBackground());
            g.fillRect(0, 0, getWidth(), getHeight());
            g.setColor(savedColor);
            g.setColor(Color.red);
            java.util.Random random = new java.util.Random(1234);
            for (int i = 0; i < 1000; i++)
                g.fillRect(random.nextInt(getWidth()), random.nextInt(getHeight()), 10, 10);
}