Question

I have a QTableWidget and the first column contains numbers from 1 to 1000. Now I need to sort the table based on this first column.

I’m using the function sortItems(int column, Qt::AscendingOrder), but it is displayed as:

1, 10, 100, 1000, 101, 102, …

Yet I need this result:

1, 2, 3 ,4…., 1000.

I’m using a CSV file for populating the table.

Answer 1

The easiest way is probably to subclass QTableWidgetItem and then implement the < operator to be smart about the fact that you’re sorting numbers and not strings.

class MyTableWidgetItem : public QTableWidgetItem {
    public:
        bool operator <(const QTableWidgetItem &other) const
        {
            return text().toInt() < other.text().toInt();
        }
};

Then when you’re populating your table you can pass it instances of your custom items that know how to sort themselves properly instead of the generic ones.