I have a 'formatted' field - that is that it must be finally in a form like this: xx/xxxx/xx I'd like to make it so that while typing you get the '/' added automatically.
The way that I am trying to cobble together is something like this:
JTextField field = new JTextField ("xx/xxxx/xx");
// a focus listener to clear the "xx/xxxx/xx" on focus & restore on focus-out
// the override the 'document' with this:
field.setDocument (new PlainDocument () {
public void insertString (int off, String str, AttributeSet attr) throws BadLocationException {
if (off == 2 || off == 7) {
super.insertString (off + 1, str + "/", attr);
}
}
}
This seems like it is going to break - and how do I properly deal with when it goes from: xx/xx.. to xx? I think having them delete the '/' is ok.
I feel there should be a better way? Maybe a library I could use? Something other than my...special stuff.
Thanks for any input you have!!
To achieve this I did this:
JTextField field = new JTextField ();
field.setDocument (new PlainDocument () {
public void insertString (int off, String str, AttributeSet attr) throws BadLocationException {
if (off < 10) { // max size clause
if (off == 1 || off == 6) { // insert the '/' occasionally
str = str + "/";
}
super.insertString (off, str, attr);
}
}
});
field.setText ("xx/xxxx/xx"); // set AFTER otherwise default won't show up!
field.setForeground (ColorConstants.DARK_GRAY_080); // make it light!
field.addFocusListener (new ClearingFocusListener (field)); // could be done in an anonymous inner class - but I use it other places
private static class ClearingFocusListener implements FocusListener {
final private String initialText;
final private JTextField field;
public ClearingFocusListener (final JTextField field) {
this.initialText = field.getText ();
this.field = field;
}
@Override
public void focusGained (FocusEvent e) {
if (initialText.equals (field.getText ())) {
field.setText ("");
field.setForeground (ColorConstants.DARK_GRAY_080);
}
}
@Override
public void focusLost (FocusEvent e) {
if ("".equals (field.getText ())) {
field.setText (initialText);
field.setForeground (ColorConstants.LIGHT_GRAY_220);
}
}
}
This is different that the other solution in that the '/' doesn't exist when there is no text, it is added at the right places. It doesn't currently doesn't deal with any of the replacement stuff -- eh. :/