Thanks,

In the designer the dock widget has a default width of 80, it is strange that we cannot change this !

Also, normally the child widgets should be resized based on the size of the dock widget... and not the inverse ! I have play with several docking control VC, WPF, ... and it was always like this !

So, why here it is the inverse ?

Also, I don't want to have a fixed(or minimum) size for childs widgets, I want that they follow the size of the dock widget ! Finally the problem is the same.

The solution is to change this by code at runtime... maybe... but it is strange that it is not a parameter in the designer !