Method insertChildren

src/backend/worksheet/TreeModel.cpp:53–64

}

bool TreeItem::insertChildren(int position, int count, int columns) {
	if (position < 0 || position > childItems.size())
		return false;

	for (int row = 0; row < count; ++row) {
		QVector<QVariant> childData(columns);
		auto* childItem = new TreeItem(childData, this);
		childItems.insert(position, childItem);
	}

	return true;
}

bool TreeItem::insertColumns(int position, int columns) {
	if (position < 0 || position > itemData.size())