TextField Document model (original) (raw)

Scott Palmer swpalmer at gmail.com
Wed Oct 17 14:05:13 PDT 2012

Using the override mechanism that Will suggested is probably easier for converting to uppercase.

final TextField allCapsTextField = new TextField() { @Override public void replaceText(int start, int end, String text) { super.replaceText(start, end, text.toUppercase()); } @Override public void replaceSelection(String text) { super.replaceSelection(text.toUppercase()); } };

or you could still use the Event Filter and handle the insertion of the characters manually if they are lowercase and then consume the event. I think that will be more work and be more error-prone though. As you mention you would have to handle pasting and drag and drop and all ugly details. Overriding seems cleaner.

Perhaps you should take a look at the source code to TextInputControl. Instead of the Document they have a Content interface. Maybe you can do some of what you want by overriding getContent().

Scott

On 2012-10-17, at 4:41 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?

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

More information about the openjfx-dev mailing list