public Coord contentsz() {
Coord max = new Coord(0, 0);
for (Widget wdg = child; wdg != null; wdg = wdg.next) {
if (twdgs.contains(wdg)) continue;
if (!wdg.visible) continue;
Coord br = wdg.c.add(wdg.sz);
if (br.x > max.x) max.x = br.x;
if (br.y > max.y) max.y = br.y;
}
return (max.sub(1, 1));
}
public void addtwdg(Widget wdg) {
twdgs.add(wdg);
placetwdgs();
}