/**
* Add a "dummy" row. It does not have a #Window and its height is
* zero. This may be used to "reserve" a row index when a row is
* not present in a certain instance of the form.
*/
void AddDummy() {
rows.push_back(Row::Type::DUMMY);
}
/**
* Add a #Widget row. The object will be deleted automatically.
*/
void Add(Widget *widget) {
rows.push_back(widget);
}
void AddItem(Window &w) {
items.push_back(&w);
}