ScrollTest.java

package org.freehep.graphicsio.ps.test;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.io.File;
import java.io.FileOutputStream;
import java.util.Properties;

import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollBar;
import javax.swing.JScrollPane;

import org.freehep.graphicsio.ps.EPSExportFileType;
import org.freehep.util.export.ExportFileType;

public class ScrollTest {

    public static void main(String[] args) {
        JFrame frame = new JFrame();

        JPanel jcomponent = new TestPanel();
        jcomponent.setLayout(new BoxLayout(jcomponent, BoxLayout.X_AXIS));

        JScrollPane scroll = new JScrollPane(jcomponent);
        frame.setContentPane(scroll);
        scroll.setPreferredSize(new Dimension(300, 50));

        // Make a long row of buttons.
        int xmax = 32;
        for (int x = 0; x < xmax; x++) {
            JPanel button = new TestSubPanel("Test:" + x);
            jcomponent.add(button);
        }

        // Make the frame visible.
        frame.pack();
        frame.setVisible(true);

        // Reset the scroll bar to the middle of the row.
        JScrollBar bar = scroll.getHorizontalScrollBar();
        int max = bar.getMaximum();
        int min = bar.getMinimum();
        bar.setValue((max + min) / 2);

        ExportFileType epsOut = new EPSExportFileType();
        try {

            File file;
            FileOutputStream fos;

            System.out.println("\nPrinting image...\n");
            file = new File("ScrollTest.eps");
            fos = new FileOutputStream(file);
            epsOut.exportToFile(fos, scroll, frame, new Properties(), null);
            fos.close();

            System.out.println();
            System.out.println("An image of the frame should have been ");
            System.out.println("produced (ScrollTest.eps).  If this image ");
            System.out.println("is not correct, then check the clipping");
            System.out.println("rectangles in the graphics code.");
            System.out.println();

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    static class TestSubPanel extends JPanel {

        private String label = null;

        public TestSubPanel(String label) {
            super(new BorderLayout(), false);
            this.label = label;
            setBorder(BorderFactory.createLineBorder(Color.black, 1));
            JButton button = new JButton(label);
            add(button, "North");
        }

        public String getLabel() {
            return label;
        }

        public void paintComponent(Graphics g) {
            System.out.println("Draw subpanel: " + label + " " + g.getClip());
            super.paintComponent(g);
        }
    }

    static class TestPanel extends JPanel {
        public TestPanel() {
        }

        public void paintComponent(Graphics g) {
            System.out.println("Draw panel: " + g.getClip());
            super.paintComponent(g);
        }
    }

}