const TXshCell &TXsheet::getCell(int row, int col) const {
static const TXshCell emptyCell;
TXshColumnP column = m_imp->m_columnSet.getColumn(col);
if (!column) return emptyCell;
TXshCellColumn *xshColumn = column->getCellColumn();
if (!xshColumn) return emptyCell;
return xshColumn->getCell(row);
}
void TXsheet::getUsedLevels(set<TXshLevel *> &levels) const {
set<const TXsheet *> visitedXshs;
vector<const TXsheet *> todoXshs;
visitedXshs.insert(this);
todoXshs.push_back(this);
while (!todoXshs.empty()) {
const TXsheet *xsh = todoXshs.back();
todoXshs.pop_back();
int c0 = 0, c1 = xsh->getColumnCount() - 1;
for (int c = c0; c <= c1; ++c) {
TXshColumnP column = const_cast<TXsheet *>(xsh)->getColumn(c);
if (!column) continue;
TXshCellColumn *cellColumn = column->getCellColumn();
if (!cellColumn) continue;
int r0, r1;
if (!cellColumn->getRange(r0, r1)) continue;
TXshLevel *level = 0;
for (int r = r0; r <= r1; r++) {
TXshCell cell = cellColumn->getCell(r);
if (cell.isEmpty() || !cell.m_level) continue;
if (level != cell.m_level.getPointer()) {
level = cell.m_level.getPointer();
levels.insert(level);
if (level->getChildLevel()) {
TXsheet *childXsh = level->getChildLevel()->getXsheet();
if (visitedXshs.count(childXsh) == 0) {
visitedXshs.insert(childXsh);
todoXshs.push_back(childXsh);
}
}
}
}
}
}
}
