Scrolling in JTextPane - not the usual question

Thread view:

ni4ni - 01 Feb 2005 11:22 GMT

I have a JTextPane inside a JScrollPane .
I add a bulk of text to it and highlight few scattered words.

Until now everything works just fine.
Now I have a forward and backward buttons which should scroll the text
to the next or previous highlighted word respectively.

I do not need to scroll to the last line as most people post here, but
to a certain point within the text (character number or maybe a line
number).

Any ideas how to do that ?

Reply to this Message

Roland - 01 Feb 2005 12:03 GMT

> I have a JTextPane inside a JScrollPane .
> I add a bulk of text to it and highlight few scattered words.
[quoted text clipped - 8 lines]
>
> Any ideas how to do that ?

int pos = ... // calculate position of word in document
Rectangle r = yourTextPane.modelToView(pos);
Rectangle vis = yourTextPane.getVisibleRect();
r.height = vis.height;
yourTextPane.scrollRectToVisible(r);

Untested, but based on JEditorPane.scrollToReference(String)

Signature

Regards,

Roland de Ruiter
___ ___
/__/ w_/ /__/
/ \ /_/ / \

Reply to this Message

klynn47@comcast.net - 01 Feb 2005 12:48 GMT

What about setCaretPosition? I needed to move the cursor to the end of
the text that I entered, and I used setCaretPosition

Reply to this Message

Roland - 01 Feb 2005 12:59 GMT

> What about setCaretPosition? I needed to move the cursor to the end of
> the text that I entered, and I used setCaretPosition

Yeah, that seems much simpler. I don't know if takes care of scrolling
when the new caret position isn't yet visible. Just a case of trying it
out, I guess.
And setCaretPosition also changes the position of the input caret, but
if OP doesn't mind, he/she should use this.

Signature

Regards,

Roland de Ruiter
___ ___
/__/ w_/ /__/
/ \ /_/ / \

Reply to this Message

ni4ni - 01 Feb 2005 15:26 GMT

setCaretPosition did not work for me (I tried it before posting my
question).

Anyway, I ended up using
myJScrollPane.getVerticalScrollBar().setValue() after I realized that
scrolling to the right line is good enough for me.

Thanks

Guy

Reply to this Message

Scrolling in JTextPane - not the usual question

Free Magazines