Resolution handling in QMainWindow

Question

I've a QMainWwindow, and I've fixed its size.

i.e. I've set Minimum and maximum size of the window to the same number.

Could anyone tell me whether this will be a problem if I'm to use this in another screen with a different resolution, and if so, how am I to handle it?

Kindly advise, and also if there's another way ( perhaps more elegant) to set the size of the QMainWindow.

UPDATE :

I have a QMainWindow with a QTableView as a widget, amongst others. When I expand the main Window, the tableview does not, and it leaves an ungainly blank space, so I fixed the size.

If I were to make it resizeable, how do I expand the QTableView widget, alongwith the QMainWindow. I have a Central Widget, this widget has a vertical box layout, and to this layout I've added the 3 widgets, one with QGridlayout, one horizontal line, and the other QTableView. The QTableView, on its own, is not inside a layout.

I'd imagined this would be sufficient to expand the table too, once QMainWindow were expanded, or reduced, but it doesn't happen.

How do i go about it, i.e., expanding the QTableView as well?

Thanks.

Answer 1

It will be a problem if you fix the size to one that is larger than the screen can handle. There are various ways to scale the size of a window according to the screen size. I recommend using QApplication::desktop(), which will return the desktop widget (you may need to #include <QDesktopWidget>. Note that this widget can actually encompass multiple screens, so if you just want the current screen, you can just do:

QRect screenGeometry = QApplication::desktop()->screenGeometry();

You could alternatively use QDesktopWidget::availableGeometry().

It is worth mentioning that among Qt users, I think there is a general dislike of fixed size windows. Most recommend taking full advantage of the Qt layout system, which provides lots of flexibility for resizing windows. I'm not saying you should definitely do this, because all projects are different, but it could be worth looking into.