I am using QSizeGrip in my Widget and apparently on Windows I dont get the MouseButtonRelease event whereas I do get the same on MAC OS X.
I have tested this using installEventFilter and printing out the event names.
On windows whenever I resize I get the events in the below order
ToolTip or Leave
So, whenever I get in the above order I am assuming as resize happened but strictly speaking, I should be getting a MouseButtonRelease event as I get in MAC OSX.
Please look into this.