How to make selected and clickable text (get data)?

Question

Qt

The question is. There is data that is output to the 16th dump, in the form of a table drawn by QPainter, the size of the table changes with the size of the window where the table is. The option to use the model is not suitable, the elements are displayed in the order of 5500 and if the window decreases, you will need to remove part of it, that's okay, but if you increase it, then several thousand + at once. It's very long, QPainter provides fast rendering, but it's drawing. Are there any efficient alternatives with text interaction option. I also tried by specifying the rect area for each dump value, also slowly .. I hope the essence is clear