Automating scrolling of a JTable when model gets updated

Hi,
I have a JTable in a JScrollPane with a table model that updates in real time and I need to keep the currently selected row on the same place on screen (for example when a row is inserted before the selected row I'd like the scroll pane to automatically scroll one row down so the selected row remains at the same location on screen).
the scrollpane before the row insertion:
row A
row B
row C
row D (selected)
row E
now 'row F' is inserted between B and C
row B
row F
row C
row D (selected)
row E
(row A is scrolled out of sigth and D remains (visually) the 4th row in the view)
Is there any easy way how to achieve this ? I tried a number of approaches but all end up with an annoying scrollpane jitter.

I'd try to call JViewPort's scrollRectToVisible(Rectangle contentRect) for the JScrollPane.getViewPort() and keep the parameter Rectangle's size the same (JViewPort.getViewRect()) but adjust the y-position by amount returned by JTable.getRowHeight() + JTable.getRowmargin(). This would be done after row wuold be added and only if vertical scrollbar is visible.
Maybe this is what you have tried already. Anyway I hope this helps.

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I am having a table with 4 columns as mentioned below
For a particular prod the value greater less than 5 should be rounded to 5 and value greater than 5 should be rounded to 10. And the rounded quantity should be adjusted with in a product starting with orderby of rank with in a prod else leave it
Table1
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2     A     6     2
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4     B     6     1
5     B     3     2
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Hi,
Below is the scenario. Which I am looking for.
ITEM_ID(A)
ITEM_ID Value Date
A          3     D1
A          5     D2
A          3     D3
A          5     D4
A          3     D5
A          5     D6
Rounding for Item A has to be done for the rows less then D2 and rounding value is
x and value adjustment to be done from very next row.
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--For record D2 (updated value has to be taken from rounding which updated in D1 row rounding) and the adjustment has to be done from very next row D3 to till the end or adjustment value is o.
--For D3 row onwards no rounding has to be done.
ITEM_ID(B)
B          7     D1
B          8     D2
B          9     D3
B          5     D4
B          4     D5
B          3     D6
Rounding for Item has to be done for the rows less then D3 and rounding value is
y and value adjustment to be done from very next row.
--For record D1 rounding to be done and value adjustment is to be done from D2 to till the end untill the adjustment value is 0.
--For record D2 (updated value has to be taken from rounding which updated in D1 row rounding) and the adjustment has to be done from very next row D3 to till the end or adjustment value is o.
--For record D3 (updated value has to be taken from rounding which updated in D2 row rounding) and the adjustment has to be done from very next row D4 to till the end or adjustment value is o.
--For D4 row onwards no rounding has to be done.
Thanks in Advance
Edited by: unique on Apr 16, 2010 11:20 PM

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Automating scrolling of a JTable when model gets updated

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