Date slider
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ComponentEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;
import java.text.DateFormatSymbols;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Hashtable;
import javax.swing.Box;
import javax.swing.BoxLayout;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.border.EtchedBorder;
import javax.swing.border.TitledBorder;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
public class DateSlider extends JFrame {
public final static Dimension RIGID_DIMENSION = new Dimension(1, 3);
protected GregorianCalendar calendar = new GregorianCalendar();
protected JLabel dateLabel;
protected JSlider yearSlider = new JSlider(JSlider.HORIZONTAL, 1990, 2010, calendar
.get(Calendar.YEAR));
protected JSlider monthSlider = new JSlider(JSlider.HORIZONTAL, 1, 12, calendar
.get(Calendar.MONTH) + 1);
protected JSlider daySlider;
protected Hashtable hashTable;
protected SimpleDateFormat dateFormat = new SimpleDateFormat("EEE, MMM d, yyyyy");
public DateSlider() {
super("Date Slider");
setSize(500, 340);
Date currentDate = new Date();
calendar.setTime(currentDate);
JPanel p1 = new JPanel();
p1.setLayout(new GridLayout(4, 1));
JPanel p = new JPanel();
p.setBorder(new TitledBorder(new EtchedBorder(), "Selected Date"));
dateLabel = new JLabel(dateFormat.format(currentDate) + " ");
dateLabel.setFont(new Font("Arial", Font.BOLD, 24));
p.add(dateLabel);
p1.add(p);
yearSlider.setPaintLabels(true);
yearSlider.setMajorTickSpacing(5);
yearSlider.setMinorTickSpacing(1);
yearSlider.setPaintTicks(true);
DateListener lst = new DateListener();
yearSlider.addChangeListener(lst);
p = new JPanel();
p.setBorder(new TitledBorder(new EtchedBorder(), "Year"));
p.setLayout(new BoxLayout(p, BoxLayout.Y_AXIS));
p.add(Box.createRigidArea(RIGID_DIMENSION));
p.add(yearSlider);
p.add(Box.createRigidArea(RIGID_DIMENSION));
p1.add(p);
String[] months = (new DateFormatSymbols()).getShortMonths();
hashTable = new Hashtable(12);
for (int i = 0; i < 12; i++)
hashTable.put(new Integer(i + 1), new JLabel(months[i],
JLabel.CENTER));
monthSlider.setLabelTable(hashTable);
monthSlider.setPaintLabels(true);
monthSlider.setMajorTickSpacing(1);
monthSlider.setPaintTicks(true);
monthSlider.addChangeListener(lst);
p = new JPanel();
p.setBorder(new TitledBorder(new EtchedBorder(), "Month"));
p.setLayout(new BoxLayout(p, BoxLayout.Y_AXIS));
p.add(Box.createRigidArea(RIGID_DIMENSION));
p.add(monthSlider);
p.add(Box.createRigidArea(RIGID_DIMENSION));
p1.add(p);
int maxDays = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
daySlider = new JSlider(JSlider.HORIZONTAL, 1, maxDays, calendar
.get(Calendar.DAY_OF_MONTH));
daySlider.setPaintLabels(true);
daySlider.setMajorTickSpacing(5);
daySlider.setMinorTickSpacing(1);
daySlider.setPaintTicks(true);
daySlider.addChangeListener(lst);
p = new JPanel();
p.setBorder(new TitledBorder(new EtchedBorder(), "Day"));
p.setLayout(new BoxLayout(p, BoxLayout.Y_AXIS));
p.add(Box.createRigidArea(RIGID_DIMENSION));
p.add(daySlider);
p.add(Box.createRigidArea(RIGID_DIMENSION));
p1.add(p);
getContentPane().add(p1, BorderLayout.CENTER);
WindowListener wndCloser = new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
};
addWindowListener(wndCloser);
enableEvents(ComponentEvent.COMPONENT_RESIZED);
setVisible(true);
}
protected void processComponentEvent(ComponentEvent e) {
if (e.getID() == ComponentEvent.COMPONENT_RESIZED) {
int w = getSize().width;
yearSlider.setLabelTable(null);
if (w > 200)
yearSlider.setMajorTickSpacing(5);
else
yearSlider.setMajorTickSpacing(10);
yearSlider.setPaintLabels(w > 100);
monthSlider.setLabelTable(w > 300 ? hashTable : null);
if (w <= 300 && w >= 200)
monthSlider.setMajorTickSpacing(1);
else
monthSlider.setMajorTickSpacing(2);
monthSlider.setPaintLabels(w > 100);
daySlider.setLabelTable(null);
if (w > 200)
daySlider.setMajorTickSpacing(5);
else
daySlider.setMajorTickSpacing(10);
daySlider.setPaintLabels(w > 100);
}
}
public void showDate() {
calendar.set(yearSlider.getValue(), monthSlider.getValue() - 1, 1);
int maxDays = calendar.getActualMaximum(Calendar.DAY_OF_MONTH);
if (daySlider.getMaximum() != maxDays) {
daySlider.setValue(Math.min(daySlider.getValue(), maxDays));
daySlider.setMaximum(maxDays);
daySlider.repaint();
}
calendar.set(yearSlider.getValue(), monthSlider.getValue() - 1, daySlider
.getValue());
Date date = calendar.getTime();
dateLabel.setText(dateFormat.format(date));
}
class DateListener implements ChangeListener {
public void stateChanged(ChangeEvent e) {
showDate();
}
}
public static void main(String argv[]) {
new DateSlider();
}
}
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