QT widget design - square under main window

[StenGay]

My setup is like this:

main.cpp:

//Window customization
w.setWindowFlags(w.windowFlags() | Qt::FramelessWindowHint);
w.setAttribute(Qt::WA_TranslucentBackground);

Stylesheet:

#centralwidget  {
	border-radius:20px;
}

And the widget then looks like this:

As you can see there's a rectangle att the bottom. How can I identify what element this is, remove it or if I cant, atleast cover it with the rounded widget by moving it up/moving main widget down?

[Pl45m4]

@StenGay said in QT widget design - square under main window:

As you can see there's a rectangle att the bottom. How can I identify what element this is, remove it or if I cant, atleast cover it with the rounded widget by moving it up/moving main widget down?

There is no "square" under your mainWindow... It's a part of it ;-)
Took me minutes of looking at the image to see what you are talking about. Better point to it directly in the image or something :)
Your the color scheme of your desktop background also doesn't help :)

#centralwidget {
border-radius:20px;
}

You only set rounded corners to your centralWidget and not the whole window.
The area below is exactly what is not part of your centralWidget.

See:

• https://doc.qt.io/qt-6/qmainwindow.html#qt-main-window-framework

If you dont need the QMainWindow related stuff (menuBars, statusBars, etc) you could replace it with your inner widget. Then it should look like desired.

Edit:

If I'm not mistaken, the part which bothers you, is the QStatusBar.
Quick and dirty fix:
(I still would consider moving to a plain QWidget and start from there)

 w.statusBar()->hide();

You can even remove it from your UI file, if you design your base MainWindow in QtDesigner. Go to Design Mode, right-click on your MainWindow or on "MainWindow" in the object list at the top right and select "Remove StatusBar" or find the QStatusBar in the object list directly and delete it.

[StenGay]

@Pl45m4 said in QT widget design - square under main window:

Took me minutes of looking at the image to see what you are talking about. Better point to it directly in the image or something :)
Your the color scheme of your desktop background also doesn't help :)

Sorry about that 😄

Thanks for the reply, I'll try that once I get home to my computer!