Htykuut

I've been looking at various way to format a JFormattedTextField to do a custom entry.

I need a display to use colon as a separator such as in a time field in the form of 12:34:56. This can obviously be done easily using a custom maskFormatter which would hold an initial value of 00:00:00 until the user starts to enter data.

This works relatively well but I needed the entry to work from right to left (similar to a calculator ~ entering digits starting from the right and filling in to the left as you type. Again using a DateFormatter works and I like the feature that you can use the up/down arrows when in a selection to inc/dec the time for each of the fields but again this doesn't allow you to enter a time such as 00:00:90 similar to how a microwave oven timer works nor does it have an overwrite function (or at least not that I can see).

I've seen a few examples using number formatter and document filters here on SO but again they fall short from my requirements.

Here is a basic class that shows all 3 examples in the simplest form.

What I'm looking for is a combination of the SimpleMaskFormatter and the SimpleDateFormat (leaning more towards the SimpleDateFormat with an overwrite feature). I was thinking I need to write a custom document filter for the date format but thought I would put this out to see if anyone had suggestions on how to work this out?

import java.text.DecimalFormat;

import java.text.DecimalFormatSymbols;

import java.text.ParseException;

import java.text.SimpleDateFormat;

import javax.swing.JFormattedTextField;

import javax.swing.JFrame;

import javax.swing.JTextField;

import javax.swing.text.MaskFormatter;

import net.miginfocom.swing.MigLayout;



public class FormattedTextInput extends JFrame {



  private FormattedTextInput() {

    setLayout(new MigLayout());



    JFormattedTextField textField1 = new JFormattedTextField(new SimpleMaskFormatter());

    textField1.setColumns(10);

    textField1.setHorizontalAlignment(JTextField.RIGHT);

    add(textField1, "wrap");



    SimpleDateFormat dateFormat = new SimpleDateFormat("HH:mm:ss");

    JFormattedTextField textField2 = new JFormattedTextField(dateFormat);

    textField2.setColumns(10);

    textField2.setHorizontalAlignment(JTextField.RIGHT);

    textField2.setText("00:00:00");

    add(textField2, "wrap");



    DecimalFormatSymbols colonSeporator = new DecimalFormatSymbols();

    colonSeporator.setGroupingSeparator(':');

    DecimalFormat decimalFormat = new DecimalFormat("00:00:00", colonSeporator);

    decimalFormat.setGroupingUsed(true);

    decimalFormat.setMaximumIntegerDigits(6);

    decimalFormat.setGroupingSize(2);

    JFormattedTextField textField3 = new JFormattedTextField(decimalFormat);

    textField3.setHorizontalAlignment(JTextField.TRAILING);

    textField3.setColumns(10);

    add(textField3, "wrap");

  }



  private class SimpleMaskFormatter extends MaskFormatter {

    SimpleMaskFormatter() {

      try {

        setMask("##:##:##");

      } catch (ParseException e) {

        e.printStackTrace();

      }

      setPlaceholderCharacter('0');

      setCommitsOnValidEdit(true);

    }

  }



  public static void main(String args) {

    FormattedTextInput window = new FormattedTextInput();

    window.setDefaultCloseOperation(DISPOSE_ON_CLOSE);

    window.pack();

    window.setLocationRelativeTo(null);

    window.setVisible(true);

  }

}