Qt app doesn't close properly (still visible in task manager)

hobbyProgrammer

@Pl45m4 said in Qt app doesn't close properly (still visible in task manager):

Maybe you can replace your windows with one or two windows with a widget container like QStackedWidget or you replace widgets on runtime. This would reduce the amount of show / hide processes. But depends on you and your needs, what will work best for you. :)

That sounds pretty good, but all the windows have different functions. The first window is to login the second is to select something and the third is a drawing app using qgraphicsview.

Pl45m4

@hobbyProgrammer said in Qt app doesn't close properly (still visible in task manager):

replace it with the new window

Widget, not window.

@hobbyProgrammer said in Qt app doesn't close properly (still visible in task manager):

So with QStackedWidget I don't need to hide my window

Yes, it works like a book. You can dynamically flip pages / widgets instead of showing a new window with static content.

@hobbyProgrammer said in Qt app doesn't close properly (still visible in task manager):

The first window is to login the second is to select something and the third is a drawing app using qgraphicsview

I think two windows are enough. You could use a QDialog to login. After successful login, you show your QMainWindow with your QGraphicsView and your "settings". Either at the same time or you put a QStackedWidget on your QMainWindow and flip after you set everything up, to start drawing

hobbyProgrammer

@Pl45m4 I understand, but I would (for now) really just like to find a way to make it work with 3 screens. Unless there's an easy way to change the screens to widgets, but I don't have much experience with that.
I currently have screens with different UI's.
I use screens with menu bars etc. so how can I convert that to a widget?

Pl45m4

@hobbyProgrammer

I've edited my last post. Check it out.

@hobbyProgrammer said in Qt app doesn't close properly (still visible in task manager):

I use screens with menu bars etc. so how can I convert that to a widget?

You use Menus in your QMainWindow, right? You can leave them as they are.
The QStackedWidget would only affect your MainWindows CentralWidget (Content of QMainWindow)

QWidget is the base class of nearly everything in Qt. Every widget is... well... a QWidget (or inherits it).

See:
https://doc.qt.io/qt-5/qwidget.html

hobbyProgrammer

@Pl45m4 no the menus are different for each screen. However, I think I can apply this to the first two screens. The third one is diferent...

Pl45m4

@hobbyProgrammer

I think you are making it more complicated than it really is or I dont understand what you are actually doing / planing to do :)
From what I've read the last days, you are coding a more or less "simple" drawing app (with clickable and editable polygons / objects, contextMenu on rightclick and further settings in a different window.... and now with a login window at program start) Correct?

hobbyProgrammer

@Pl45m4 yes that's correct

hobbyProgrammer

@Pl45m4

I wouldn't mind it if I had to remake the .ui file, but is there a way to keep the classes as they are?
I really don't want 1 big class for this as it would probably be 500 lines of code. I would like it to stay organized.

JonB

@hobbyProgrammer
Briefly, because you need this whole behaviour sorted out, as per the mess which is developing in your other thread, https://forum.qt.io/topic/108715/check-button-press-of-qmessagebox.

You have two choices:

setQuitOnLastWindowClosed(true): Make sure your code always has a window open, till you/the user chooses to close it and exit the application.
setQuitOnLastWindowClosed(false): If you cannot do the above, you must recognise in code when the last of your windows is closed and then exit the application explicitly.

Pl45m4

@hobbyProgrammer said in Qt app doesn't close properly (still visible in task manager):

I really don't want 1 big class for this as it would probably be 500 lines of code

500 LOC are not that much actually :)

You need to know what you want. If you set setQuitOnLastWindowClosed(false) only because of your MessageBox behavior, there is something wrong / not well structured with your classes.