Table with different amount of rows(diff. width) and columns(Qt5, QGridLayout)

Table with different amount of rows(diff. width) and columns(Qt5,
QGridLayout)

I want create a Table based on QGridLayout that consist my custom widgets
with different amount of columns in each row, for example:
http://urls.by/tbl
How i can do it?
When i change widgets width in first row, another rows also change width.