TextField Document model

[Mark Claassen]

Thanks for the tips.  The overriding method does not seem very pluggable,
so I started with the event filter.

I like the idea of an event filter, and I really like the how JavaFX
defined the process and the order in which items will receive events.

So, I quickly implemented my event filter like this:
        input.addEventFilter(KeyEvent.
KEY_TYPED, new EventHandler<KeyEvent>() {
            @Override
            public void handle(KeyEvent t) {
                if (input.getText().length() >=10)
                    t.consume();
            }
        });

This works for typing, but, of course, I can paste whatever I wanted.
(Perhaps I need to find a second filter for that?  How about DnD?)

All input events go through the Swing Document, so with that, there was
just one method to mess with.

Further, I currently have a Document implementation that takes user input
and converts it to upper case.  (It doesn't force the user to type in an
upper case character, it just converts it if it is not.)  Since, in the
case of a Document, I can control exactly what the data is, this is pretty
straightforward.  How is that accomplished here?  Consume the event, and
then first a new modified copy of the original.  Or do I need to start
overriding various methods?


On Wed, Oct 17, 2012 at 4:40 PM, Mark Claassen <markclaassenx at gmail.com>wrote:

> Thanks for the tips.  The overriding method does not seem very pluggable,
> so I started with the event filter.
>
> I like the idea of an event filter, and I really like the how JavaFX
> defined the process and the order in which items will receive events.
>
> So, I quickly implemented my event filter like this:
>         input.addEventFilter(KeyEvent.KEY_TYPED, new
> EventHandler<KeyEvent>() {
>             @Override
>             public void handle(KeyEvent t) {
>                 if (input.getText().length() >=10)
>                     t.consume();
>             }
>         });
>
> This works for typing, but, of course, I can paste whatever I wanted.
> (Perhaps I need to find a second filter for that?  How about DnD?)
>
> All input events go through the Swing Document, so with that, there was
> just one method to mess with.
>
> Further, I currently have a Document implementation that takes user input
> and converts it to upper case.  (It doesn't force the user to type in an
> upper case character, it just converts it if it is not.)  Since, in the
> case of a Document, I can control exactly what the data is, this is pretty
> straightforward.  How is that accomplished here?  Consume the event, and
> then first a new modified copy of the original.  Or do I need to start
> overriding various methods?
>
> Mark
>
>
>
>
>
>
> On Wed, Oct 17, 2012 at 2:13 PM, Will Hoover <java.whoover at gmail.com>wrote:
>
>> Have you tried:
>>
>> final TextField tf = new TextField() {
>>         final String restictTo = "[A-Z\\s]*";
>>         @Override
>>         public void replaceText(int start, int end, String text) {
>>                 if (matchTest(text)) {
>>                         super.replaceText(start, end, text);
>>                 }
>>         }
>>         @Override
>>         public void replaceSelection(String text) {
>>                 if (matchTest(text)) {
>>                         super.replaceSelection(text);
>>                 }
>>         }
>>         private boolean matchTest(String text) {
>>                 return text.isEmpty() || text.matches(restictTo);
>>         }
>> };
>>
>> -----Original Message-----
>> From: openjfx-dev-bounces at openjdk.java.net
>> [mailto:openjfx-dev-bounces at openjdk.java.net] On Behalf Of Mark Claassen
>> Sent: Wednesday, October 17, 2012 1:08 PM
>> To: openjfx-dev at openjdk.java.net
>> Subject: TextField Document model
>>
>> JTextComponents (like JTextField) has a javax.swing.text.Document model
>> that
>> made it pretty easy to create a text field that only allowed a certain
>> number of characters in it.  Similarly, it was also easy to make a
>> Document
>> model that took all input, but forced characters to upper case.
>>
>> @Override
>> public void insertString(int offs, String str, AttributeSet a) throws
>> BadLocationException {
>>      <Do stuff>
>> }
>>
>> What is there going to be in JavaFX to accomplish the same goals?
>>
>> Mark
>>
>>
>