Custom JSpinner Model / Editor

Question

Hello,
This question may have been answered in the past but I could not find anything. I am trying to use a JSpinner for cycling through pages of information. I would like the display to show current page of total number of pages, i.e. 1 of 10. I would also like the user to be able to enter a number and have the spinner display that number in the same format. I am not quite sure if I need to create a custom model and editor or expand the SpinnerNumberModel. Any guidance is much appreciated.

Answer 1

this might be one way for the '1 of 10', for entering a number, just add a keyListener,
and modify the methods accordingly
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
class Testing
  JSpinner spinner;
  JTextField tf;
  final int TOTAL_PAGES = 10;
  int currentPage;
  public void buildGUI()
    tf = new JTextField(10);
    tf.setHorizontalAlignment(JTextField.RIGHT);
    tf.setEditable(false);
    tf.setBackground(Color.WHITE);
    spinner = new JSpinner();
    spinner.setUI(new MyUI());
    spinner.setEditor(tf);
    changeValue(1);
    JFrame f = new JFrame();
    f.getContentPane().add(spinner);
    f.pack();
    f.setLocationRelativeTo(null);
    f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    f.setVisible(true);
  public void changeValue(int amount)
    try
      int newPageNumber = currentPage+amount;
      if(newPageNumber < 1 || newPageNumber > TOTAL_PAGES)
        java.awt.Toolkit.getDefaultToolkit().beep();
        return;
      tf.setText(newPageNumber+" of "+TOTAL_PAGES);
      currentPage = newPageNumber;
    catch(Exception e){e.printStackTrace();}
  class MyUI extends javax.swing.plaf.basic.BasicSpinnerUI
    protected Component createNextButton()
      JButton btnNext = (JButton)super.createNextButton();
      btnNext.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent ae){
          changeValue(1);}});
      return btnNext;
    protected Component createPreviousButton()
      JButton btnPrevious = (JButton)super.createPreviousButton();
      btnPrevious.addActionListener(new ActionListener(){
        public void actionPerformed(ActionEvent ae){
          changeValue(-1);}});
      return btnPrevious;
  public static void main(String[] args)
    SwingUtilities.invokeLater(new Runnable(){
      public void run(){
        new Testing().buildGUI();
}