CODEWITHSUNDEEP
javagwt
tirenweb
tirenweb

Reputation: 31749

Trying to get the char code of ENTER key

I have this this code:

newSymbolTextBox.addKeyPressHandler(new KeyPressHandler() {
  public void onKeyPress(KeyPressEvent event) {
      System.out.println("foo =" + KeyCodes.KEY_ENTER);
  System.out.println("bar =" + event.getCharCode());
  }
});

When I press ENTER I get this output:

foo =13
bar =

I expected a value after bar =. Any idea?

Upvotes: 4

Views: 80777

Answers (5)

Ilvis Faulbaums
Ilvis Faulbaums

Reputation: 21

As it sounds weird, but try to imagine that new line means '\n' as a character or the character is "Enter" button on the keyboard. So, in code it look like this:

        if(event.getKeyChar()=='\n'){
            System.out.println("You just pressed ENTER!");
        }

Upvotes: 0

Daniel De León
Daniel De León

Reputation: 13679

In windows with java 7 returns 10 for both cases.

And to display the number value of a char you need cast it to int.

System.out.println((int) e.getKeyChar());

Upvotes: 0

Justin ᚅᚔᚈᚄᚒᚔ
Justin ᚅᚔᚈᚄᚒᚔ

Reputation: 15359

You need to either use event.getNativeEvent().getKeyCode() or switch to KeyDownHandler.

newSymbolTextBox.addKeyPressHandler(new KeyDownHandler() {
  public void onKeyDown(KeyDownEvent event) {
      System.out.println("foo =" + KeyCodes.KEY_ENTER);
      System.out.println("bar =" + event.getNativeKeyCode());
  }
});

See http://code.google.com/p/google-web-toolkit/issues/detail?id=5558

Upvotes: 8

Tyler
Tyler

Reputation: 301

The value is, in fact, there. The reason you don't see anything is because the character is a carriage return. The carriage return, I believe, just moves the next line (you can google it's exact function). If you google "ascii table" you will see that the 13 you get from KeyCodes.KEY_ENTER corresponds with CR, the carriage return character.

Upvotes: 8

Dave
Dave

Reputation: 4597

KeyCodes.KEY_ENTER is the integer value of the Enter key. event.getCharCode() is the character representation, so it would show as a newline after bar =

Upvotes: 0

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