private void recomputeNumVisibleRows() {
Rectangle rect = new Rectangle();
getBounds(rect);
int h = table.getRowHeight();
numVisibleRows = (rect.height + (h - 1)) / h;
numUsableRows = numVisibleRows - 2;
scrollBar.setBlockIncrementHP(new BigInteger(Integer.toString(addressSize * (numUsableRows))));
model.fireTableDataChanged();
// FIXME: refresh selection
}
