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TextField methods help!

Posted on 2004-08-13
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Last Modified: 2010-03-31
I have a textField and a textArea:

TextArea messages = new TextArea(10,50);                      
TextField message = new TextField(52);

I have an ActionListener here:

        message.addActionListener(new ActionListener()
      {
            public void actionPerformed(ActionEvent e)
            {
                // Complete message sending action
               
               
               
            }
      };

What I wanna do is, when the user enter stuff into the textField and press enter, I wan the text to appear in textArea and the textField will be cleared. First, which method of TextField should I use to get the text? And second, how can I clear the field?

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Question by:jtcy
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8 Comments
 
LVL 7

Accepted Solution

by:
JugglerW earned 200 total points
ID: 11792483
TRy this:

TextArea messages = new TextArea(10,50);                      
TextField message = new TextField(52);

I have an ActionListener here:

        message.addActionListener(new ActionListener()
     {
          public void actionPerformed(ActionEvent e)
          {
              String text = message.getText();              
              String tmp = messages.getText();
              tmp += "\r\n" + text;
              messages.setText( tmp );
              message.setText("");
          }
     };
0
 

Author Comment

by:jtcy
ID: 11792621
um~~~ does that assume messages to have only one sentence? It should be more than one sentences.....
0
 
LVL 7

Expert Comment

by:JugglerW
ID: 11792684
What do you mean with sentence?
You may append new lines of text to the text already in text area as I've done above with.

    tmp += "\r\n" + text;

Note the += !

You may also use append() to add to end of text:

messages.append( message.getText() );

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Author Comment

by:jtcy
ID: 11792987
Oh thanks, it;s working
0
 

Author Comment

by:jtcy
ID: 11793042
What about I wanna have a "->" sign in front of the user's own message in messages? Like if the user enter hello, it will apeear as -> hello in the textArea?
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LVL 7

Expert Comment

by:JugglerW
ID: 11793536
JUst add the -> before you appenmd to textarea:

messages.append( "-> " + message.getText() );
0
 

Author Comment

by:jtcy
ID: 11803811
Thanks!

Um...how do i set the scrollbar to hm..sort of automatically scrolling down when there are new messages?? Like....for now, if the text area has been full of messages, the next messages wont appear unless the user scrolls the bar down himself. How can i make the scrollbar scrolls down itself when it is needed? ie. always update the latest messaage at the bottom?

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LVL 7

Expert Comment

by:JugglerW
ID: 11804639
use JTextArea.scrollRectToVisible(); ( see JDK doc for details)

And: Please open new question to get more help and to give others a chance.
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