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Groups > comp.lang.java.programmer > #34692

Re: JavaFX: Bindings, StringConverters, and ChangeListeners

Newsgroups comp.lang.java.programmer
Date 2016-06-22 08:06 -0700
References <87wplhbbvy.fsf@gnu.org>
Message-ID <cf173549-4d73-4f6a-9d3f-031a070ce34c@googlegroups.com> (permalink)
Subject Re: JavaFX: Bindings, StringConverters, and ChangeListeners
From Eric Douglas <e.d.programmer@gmail.com>

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On Wednesday, June 22, 2016 at 9:18:19 AM UTC-4, Tassilo Horn wrote:
> To prevent the user from entering invalid input, the textProperty() also
> has a ChangeListener that resets to the old value in case the new value
> cannot be parsed to an Integer.

Revert to old value?  You don't want a user to be able to type something and see what they typed then change it on them.  I don't know much about Java FX, I write Swing and have only needed the FX for the WebView, but for a numeric entry allowing only valid numbers I've used JTextField with a custom input filter.  The input filters process every character they try to add to or remove from the control before adding or removing it.

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Thread

JavaFX: Bindings, StringConverters, and ChangeListeners Tassilo Horn <tsdh@gnu.org> - 2016-06-22 15:18 +0200
  Re: JavaFX: Bindings, StringConverters, and ChangeListeners Nigel Wade <nmw@ion.le.ac.uk> - 2016-06-22 15:22 +0100
    Re: JavaFX: Bindings, StringConverters, and ChangeListeners Tassilo Horn <tsdh@gnu.org> - 2016-06-23 08:39 +0200
      Re: JavaFX: Bindings, StringConverters, and ChangeListeners Martin Gregorie <martin@address-in-sig.invalid> - 2016-06-23 09:59 +0000
        Re: JavaFX: Bindings, StringConverters, and ChangeListeners Nigel Wade <nmw@ion.le.ac.uk> - 2016-06-23 12:19 +0100
      Re: JavaFX: Bindings, StringConverters, and ChangeListeners Nigel Wade <nmw@ion.le.ac.uk> - 2016-06-23 12:39 +0100
        Re: JavaFX: Bindings, StringConverters, and ChangeListeners Tassilo Horn <tsdh@gnu.org> - 2016-06-23 14:39 +0200
  Re: JavaFX: Bindings, StringConverters, and ChangeListeners Eric Douglas <e.d.programmer@gmail.com> - 2016-06-22 08:06 -0700
    Re: JavaFX: Bindings, StringConverters, and ChangeListeners Tassilo Horn <tsdh@gnu.org> - 2016-06-23 08:45 +0200
      Re: JavaFX: Bindings, StringConverters, and ChangeListeners Eric Douglas <e.d.programmer@gmail.com> - 2016-06-23 05:11 -0700
        Re: JavaFX: Bindings, StringConverters, and ChangeListeners Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-06-23 08:22 -0400
          Re: JavaFX: Bindings, StringConverters, and ChangeListeners Tassilo Horn <tsdh@gnu.org> - 2016-06-23 15:12 +0200
            Re: JavaFX: Bindings, StringConverters, and ChangeListeners Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-06-23 10:56 -0400

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