Caret Position

[- ions]

hi, i am in the procces of writing a chat program for a main
Assigment, the problem im stuck on is one of the Carets position in a
JTextArea, when i hit the enter key, it appends the msg to the
conversation window but the caret in the msg area is at the start of
the next line, which in turn lets the enter key continualy send a
blank msg when its held down. I have a send button as well (as u do)
and i have that set inactive if the (!msgArea.equals("")) and the
caret goes to the very start when the button has been hit, but because
the caret is on the next line of the msgArea, the msgArea will never
be empty, ive tryed the setCaretPosition but that didnt seem to work
(i did if i set it to 1 but that lead to a NullPointerException ) So
its doing both: appending the message on the press of ENTER(good), but
doing the carrige return aswell (bad)

Heres some code:

public void keyPressed(KeyEvent ke)
{
send = msgArea.getText();
name = "They says: ";

if(ke.getKeyCode() == KeyEvent.VK_ENTER)
{
if(!send.equals(""))
{
sendMsg();
msgArea.setCaretPosition(0); //Dosn't work
}

else;
}
}

if i have poorly explainded this (probabal) explain what i havnt
expained well :S, otherwise ne advice appreciated :)

[Neomorph]

On 7 Aug 2003 07:16:27 -0700, ne*************@hotmail.com (- ions)
two-finger typed:

hi, i am in the procces of writing a chat program for a main
Assigment, the problem im stuck on is one of the Carets position in a
JTextArea, when i hit the enter key, it appends the msg to the
conversation window but the caret in the msg area is at the start of
the next line, which in turn lets the enter key continualy send a
blank msg when its held down. I have a send button as well (as u do)
and i have that set inactive if the (!msgArea.equals("")) and the
caret goes to the very start when the button has been hit, but because
the caret is on the next line of the msgArea, the msgArea will never
be empty, ive tryed the setCaretPosition but that didnt seem to work
(i did if i set it to 1 but that lead to a NullPointerException ) So
its doing both: appending the message on the press of ENTER(good), but
doing the carrige return aswell (bad)

Heres some code:

public void keyPressed(KeyEvent ke)
{
send = msgArea.getText();
Maybe if you add .trim() to your .getTex():
send = msgArea.getText().trim();
This will cut any spaces or newlines from the beginning and from the end of
the string, so you can compare better below.
name = "They says: ";

if(ke.getKeyCode() == KeyEvent.VK_ENTER)
{
if(!send.equals(""))
{
sendMsg();
msgArea.setCaretPosition(0); //Dosn't work
Are you sure you don't want to clear the textarea after having added its
text somewhere else ?:
msgArea.setText("");
}

else;
}
}

if i have poorly explainded this (probabal) explain what i havnt
expained well :S, otherwise ne advice appreciated :)

Well, it was a bit jumbled, but I think I got the gist of it ;-)

Cheers.

[Neomorph]

On 8 Aug 2003 21:07:24 -0700, ne*************@hotmail.com (- ions)
two-finger typed:

Thanks mate, that seemed to do the trick, when enter is held down the
msgArea still does the carridge returns resulting in a blank line(s)
between the top and the text, but when it is eventualy sent only the
text is sent. i guess i can put up with that blank line tho :)

Actually, what you are describing here is normal for a (J)TextArea.

Enter is supposed to add an extra newline into the text area. Otherwise you
have to use a TextListener or the ActionListener you are already using, to
modify the text in the msgArea:
msgArea.setText(msgArea.getText().trim());

Cheers.