Unsolved TableWidget Horizontal alignment

[RogerBreton]

I'm slowly getting the hang of QT.
I want to display my measurements inside a "Table".
So I use TableWidget. It works well except for a horizontal alignment problem.
This is the result of my work (after measurement is taken) :

See how all the numbers are aligned left (by default)?
This is despite having specified otherwise in Edit Widget dialog :

Have no idea what I'm doing wrong... Any help is appreciated.

Also, if you have any suggestions to edit the column widths?

[nagesh]

@RogerBreton did you modify the property through code for alignment?
Can you post the code used for set the data to Tablewidget?