pivot-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Roger and Beth Whitcomb <RogerandB...@rbwhitcomb.com>
Subject Re: 2.0.2 How to move scroll bar to bottom of ScrollPane?
Date Fri, 07 Dec 2012 07:27:26 GMT
Hi Jason,
     It's not exactly that.  It's just that in the case of TextArea all 
the real calculations happen as part of the painting code, so the bounds 
of the last character don't calculate right unless we let the paint 
happen before trying to get the bounds.  Not all components are like 
that.  And I suppose, ideally, TextArea wouldn't be like that either, 
but ....


On 12/6/12 9:49 PM, Jason Murray wrote:
> Thank you very much, that works perfectly! So anything that is set
> after it's painted requires a callback?
> --Jason
> On Tue, Dec 4, 2012 at 10:52 AM, Roger L. Whitcomb
> <Roger.Whitcomb@actian.com> wrote:
>> Hi Jason,
>>          The way we handle this case is to queue a callback that gets the
>> Bounds of the last character and calls "scrollAreaToVisible" with those
>> bounds.  Like this:
>>              ApplicationContext.queueCallback(new Runnable() {
>>                  @Override
>>                  public void run() {
>>                      Bounds bounds =
>> resultArea.getCharacterBounds(resultArea.getCharacterCount());
>>                      resultArea.scrollAreaToVisible(bounds);
>>                  }
>>              });
>> The reason you have to do the queued callback is that the painting code is
>> what actually sets the bounds, and so the value is not available until the
>> repaint happens, and then the callback is invoked right after that.
>> HTH,
>> ~Roger Whitcomb
>> -----Original Message-----
>> From: Jason Murray [mailto:icecreamguy39@gmail.com]
>> Sent: Saturday, December 01, 2012 8:29 PM
>> To: user@pivot.apache.org
>> Subject: 2.0.2 How to move scroll bar to bottom of ScrollPane?
>> Right now, I have a TextArea set to refresh its text after the enter key
>> is pressed.
>> This works just fine, but the scroll bar of the ScrollPane that the
>> TextArea is in doesn't automatically scroll down to the bottom where
>> anything new would be.
>> Is there a method of ScrollPane that I could put inside an event listener
>> to do this?
>> --Jason

View raw message