CODEWITHSUNDEEP
javaswingjtable
mdm
mdm

Reputation: 3988

Choose what rows are shown in JTable

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

Upvotes: 1

Views: 102

Answers (2)

Gilbert Le Blanc
Gilbert Le Blanc

Reputation: 51485

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.

Upvotes: 3

mKorbel
mKorbel

Reputation: 109813

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

Upvotes: 3

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