private void validate() {
_valid = true;
_minLayoutWidth = 0;
_prefLayoutWidth = 0;
for (int r = 0; r < _xxxx.length; r++) {
WidthManager wm = _xxxx[r];
wm.validate();
_yyyy.setPreferredRowHeight(r, wm.getPreferredHeight());
int w = wm.getPreferredWidth();
if (w > _prefLayoutWidth) _prefLayoutWidth = w;
_yyyy.setMinimumRowHeight(r, wm.getMinimumHeight());
w = wm.getMinimumWidth();
if (w > _minLayoutWidth) _minLayoutWidth = w;
}
_yyyy.validate();
}
