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/* Listing3801.java */
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Listing3801
extends JFrame
{
public Listing3801()
{
super("JScrollPane");
addWindowListener(new WindowClosingAdapter(true));
//Dialogpanel erzeugen
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(10, 10));
for (int i = 1; i <= 100; ++i) {
panel.add(new JCheckBox("Frage " + i));
}
//JScrollPane erzeugen
JScrollPane scroll = new JScrollPane(panel);
scroll.setCorner(
JScrollPane.UPPER_RIGHT_CORNER,
new JLabel("1", JLabel.CENTER)
);
scroll.setCorner(
JScrollPane.LOWER_RIGHT_CORNER,
new JLabel("2", JLabel.CENTER)
);
scroll.setColumnHeaderView(new ColumnHeader(panel, 10));
//JScrollPane zur ContentPane hinzuf�gen
getContentPane().add(scroll, BorderLayout.CENTER);
}
public static void main(String[] args)
{
Listing3801 frame = new Listing3801();
frame.setLocation(100, 100);
frame.setSize(300, 150);
frame.setVisible(true);
}
}
class ColumnHeader
extends JComponent
{
JComponent component;
int columns;
public ColumnHeader(JComponent component, int columns)
{
this.component = component;
this.columns = columns;
}
public void paintComponent(Graphics g)
{
int width = component.getSize().width;
int height = getSize().height;
int colwid = width / columns;
for (int i = 0; i < columns; ++i) {
g.setColor(i % 2 == 0 ? Color.yellow : Color.gray);
g.fillRect(i * colwid, 0, colwid, height);
}
g.setColor(Color.black);
g.drawLine(0, height - 1, width, height - 1);
}
public Dimension getPreferredSize()
{
return new Dimension(component.getSize().width, 20);
}
}
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