TextField Document model (original) (raw)

Mark Claassen markclaassenx at gmail.com
Wed Oct 17 13:41:03 PDT 2012

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() { @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.KEYTYPED, new EventHandler() { @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 { } What is there going to be in JavaFX to accomplish the same goals? Mark

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