Name: sgC58550 Date: 05/08/97


Create a TextArea, determine position of substring using indexOf(),
^Dse the returned index in eg. replaceWith or TextArea.select().^W
In the first line of the TextArea it will work OK.....
In every next line an extra difference between the meant position
and the result occurs. It seems to me that indexOf() doesn't count
any carriage returns and all the other functions does.
Try to type three lines of text in the
TextEditTest program eg. this is a test [enter] it doesn't work
[enter] what's the problem[enter].
Now, if you try to replace it (second line) with "this" it won't
work correct !! If you would try to do the same thing in the
third line the result would be worse.....

The following piece of code will demonstrate the problem:

import java.awt.*;

public class TextEditTest extends Frame {

public TextEditTest() {
setTitle("TextEditTest");
Panel p = new Panel();
p.setLayout(new FlowLayout());
p.add(new Button("Replace"));
from = new TextField(10);
p.add(from);
p.add(new Label("with"));
to = new TextField(10);
p.add(to);
add("South", p);
ta = new TextArea(8, 40);
add("Center", ta);
}

public boolean handleEvent(Event evt) {
if (evt.id == Event.WINDOW_DESTROY)
System.exit(0);
return super.handleEvent(evt);
}

public boolean action(Event evt, Object arg) {
if (arg.equals("Replace")) {
String f = from.getText();
int n = ta.getText().indexOf(f);
if (n >= 0 && f.length() >0)
ta.replaceText(to.getText(), n, n + f.length());
}
else {
return super.action(evt, arg);
}
return true;
}

public static void main(String[] args) {
Frame f = new TextEditTest();
f.setSize(300, 200);
f.setVisible(true);
}

private TextArea ta;
private TextField from, to;
}



company - Columbus Group Communications Inc.
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