Turn off opaque resizing of QMainWindow / QDockWidget separator

Question

Is it possible to turn off opaque resizing on QMainWindow / QDockWidget separators?

(i.e. the central widget only resizes once the separator is dropped, and not during the drag.)

Answer 1

QMainWindow has an animated property that specifies whether animation is used for manipulation of dock widgets and tool bars. By default, this property is enabled so you'll get dynamic (and animated) resizing of the central widget when moving dock widgets around. Clearing it should give you functionality similar to turning off opaque resize in a QSplitter.

QMainWindow* mainWin(new QMainWindow);
mainWin->setAnimated(false);