@jsulm Okay. I am truly sorry for this, but apparently what I was looking for was showMaximized(). Thank you for the help.

@cosmonaut65 said in EGLFS Full Screen issue on Raspberry Pi 4 Desktop:

For the time being, booting into the CLI will have to do I guess

is your issue solved then? if so please don't forget to mark your post as such. Thanks.

Hey! I've found the solution myself again.)) I answered it at StackOverflow:
https://stackoverflow.com/questions/25340593/issue-with-fullscreen-mode-in-android-with-qt-5-3-1/59469941#59469941
Here is my result:
photo_2019-12-24_19-14-51.jpg
The status and navigation bars are hidden:
photo_2019-12-24_19-14-53.jpg

Same problem here with QPushButton's menu.
Qt 5.14.1, Mingw, Windows 10, Windows 11.

and some interest thing is that when I use an application to record my screen, it's showing the menu!!!!!! (checked the video of screen), but I can't see when interacting :|

additionaly to what @raven-worx said, you can try setting this windowflag

setWindowFlag(Qt::MaximizeUsingFullscreenGeometryHint,true);

this should paint the window over everything.

Thanks for the Reply.
I will try your solution also.
But i found one solution.

I just replaced

window.show()

in startup.qml to

window.showFullScreen()

And this fulfills my requirements.

@p3c0 Thanks for your help, I will try your option, I hope I could use QQuickWidget instead of QQmlApplicationEngine with no problem or unexpected effect.

@jsulm Sorry, i was i little wrong. Widget is full screen after showNormal(). I have the same problem if i call hide instead of showNormal.

Just an update: I ended up just using a "container widget" that holds the video widget. This way I can just add the container widget to the layout and detach the video widget from the container when going full screen. Then I just add it back to the container instead of trying to add it to the layout exactly as it was. In my case, I'm actually using a QStackedWidget as the "container" since I need to switch the video out with other views anyways. It works out perfectly. This project is really coming along nicely. I'm loving Qt right now. :)

@Wilk said:

The reason that it did not work with QMainWindow or QWidget is that those classes does not implement fullScreen as full featured property - it can not be set with setFullScreen() slot.

I see, thanks for the precision.

@Wilk said:

Thanks alot

No problem, I hope your bug report will be helpful for other people.

I think I was finally able to solve the problem.

As the solution suggested by @hskoglund is Windows-specific, I decided to first investigate a bit deeper the other options presented by @J-Hilk

It turned out that the Qt::WindowStaysOnTopHint flag was not set for our main window. I am now setting that flag in our main windows's constructor, and afterwards show it full screen. This seems to work.

Thanks again for your suggestions!

@D.Fahsig
I am not sure where is the error but it works for me .May be try reinstalling the Qt with necessary components may fix some times. Good luck
FYI: i also Qt 5.5 on windows 7 64 bit.

Just to be clear, it's not app crash, I did not describe it good.
Sometimes fullscreen mode look messy(look at image), let say it's happening every 10th time.
But, I can exit from that messy fullscreen and video plays in normal mode.

I tried:

resize(QApplication::desktop()->width(), QApplication::desktop()->height());

But no effect.

@SGaist
I have Gamma Ray, I guess it can help.
Which informations are relevant?

Hi,

Sounds like you may have found a regression. You should take a look at the bug report system to see if it's something known. If not please consider opening a new report providing a minimal compilable example showing the behavior

Have this issue (Win10, Qt 5.12). "flags: Qt.WindowFullScreen" workaround is not working for me. What helped was switching to OpenGLES in my main cpp file.

QCoreApplication::setAttribute(Qt::AA_UseOpenGLES, true);