#qlayout

To disable the resizing of the window, a simple method is to use the setSizeConstraint function of the Layout.

To do this get the layout from the window first.

QDialog *myWindow = new QDialog;

QLayout *myLayout = myWindow->layout();

Then set the SizeConstraint property to fixed size using SetFixedSize enum of QLayout class. So that The window size is set to sizeHint(); it cannot be resized at all.

myLayout->setSizeConstraint(QLayout::SetFixedSize);