Choose what rows are shown in JTable

Question

I have a JTable and, inside its TableModel, I saved an int; this is the row index that I want my view to "keep in the middle" of the Viewport.
What I mean is that, for example, if I have 1000 rows, 10 are shown in the View at any time and my index is 500, I want my vieport to automatically show rows 495-504. These rows are not necessarily selected. I hope I was able to explain my problem properly.

Thank you

score 3 · Answer 1 · edited May 23 '17 at 09:59

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1) JTable (notice can by caused by Filtering) returns number of rows

2) each of row can returns Rectangle

3) put this Rectangle to the JScrollPane#scrollRectToVisible(Rectangle aRect) wrapped into invokeLater(), simple example about moving JViewport to the decision row here

edited May 23 '17 at 09:59

Community

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answered Jan 27 '12 at 14:26

mKorbel

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score 3 · Accepted Answer · answered Jan 27 '12 at 14:28

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Assuming your row heights are the same,

int rowPosition = index - 10 / 2;
int pixelPosition = rowPosition * table.getRowHeight(rowPosition);
scrollPane.getViewPort().setViewPosition(new Point(0, pixelPosition));

If the row heights aren't the same, you would have to sum all of the row heights from row 1 to row index - 5.

answered Jan 27 '12 at 14:28

Gilbert Le Blanc

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Instead of table.getHeight(), try scrollPane.getViewPort().getExtentSize(). – Gilbert Le Blanc Jan 27 '12 at 16:23

Choose what rows are shown in JTable

2 Answers2