How to set QTableWidget upper left corner using a background image？

Question

How to set QTableWidget upper left corner using a background image? Now it is white. (Pointed in the image below)

Answer 1

You will have to use a custom row-headers column:

• disable the builtin row headers column,
• add a column to hold row numbers,
• define slots to update row ID when rows are added/removed and to select row, change its font etc,
• and finally set the widget to be used in column=0 column header.