Question

I tried:

    QTableWidget *j = new QTableWidget (10000, 5, centralWidget);
    j->setColumnWidth (0, 500);
    j->setColumnWidth (1, 30);
    j->setColumnWidth (2, 30);
    j->setColumnWidth (3, 320);
    j->setColumnWidth (4, 310);

    j->setWordWrap (true);

Also tried resizeColumnsToContents and resizeRowsToContents, but failed.

If the text is longer than the set width, I want the sentence to break down.
Currenty, the lengthy part of the sentence just doesn’t get shown.

Answer 1

setWordWrap defines the behaviour of the text, without altering column size. If you need to keep column width fixed, call resizeRowsToContents after the insertion of the item to the cell (I assume you’re adding text to the table via QTableWidgetItem).

Please notice that if any of the words contained in the item are wider than column size, text will be elided from that point on (by default you will see ellipses: …). If you want to change such behaviour you need to reimplement item’s painting function or stretch your columns.