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How to determine line number/caret position [message #443312]

Wed, 22 September 2004 12:44

Hermann Platzer

Messages: 4
Registered: July 2009

Junior Member

I have a StyledText widget and want to display in a separate label the
actual line number and caret position.
Which listener is to use resp is there somewhere a code snippet?

Best regards,
Hermann

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Re: How to determine line number/caret position [message #443316 is a reply to message #443312]

Wed, 22 September 2004 14:36

Rob Warner

Messages: 9
Registered: July 2009

Junior Member

You can use a key listener:

styledText.addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent event) {
// Update your label
}
});

Use styledText.getCaretOffset() to get the caret position.
Use styledText.getLineAtOffset(caretOffset) to get the line number.
Remember that the returned line number is zero-based, so you'll probably
want to add 1.

Hermann Platzer wrote:

> I have a StyledText widget and want to display in a separate label the
> actual line number and caret position.
> Which listener is to use resp is there somewhere a code snippet?

> Best regards,
> Hermann

Report message to a moderator

Re: How to determine line number/caret position [message #443353 is a reply to message #443316]

Thu, 23 September 2004 06:46

Hermann Platzer

Messages: 4
Registered: July 2009

Junior Member

Thanks - that works fine!
I've tried a VerifyKeyListener, but the counts are not correct in all
situations ... (Eclipse 2.1.0)

Rob Warner wrote:

> You can use a key listener:

> styledText.addKeyListener(new KeyAdapter() {
> public void keyPressed(KeyEvent event) {
> // Update your label
> }
> });

> Use styledText.getCaretOffset() to get the caret position.
> Use styledText.getLineAtOffset(caretOffset) to get the line number.
> Remember that the returned line number is zero-based, so you'll probably
> want to add 1.

> Hermann Platzer wrote:

> > I have a StyledText widget and want to display in a separate label the
> > actual line number and caret position.
> > Which listener is to use resp is there somewhere a code snippet?

> > Best regards,
> > Hermann

Report message to a moderator

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