@SGaist Thank you very much. One last questions before closing this thread:

Does using setListWigetItem (QListWidget) make an difference in performance compared to just using the widgets inside a scrollarea or is the overhead the same?

Have a nice day! :)

@SGaist I actually have some of them built already. Thats why i was asking what would be better/ if my approach with the database would be viable. :)
Have a nice easter.

@StudentScripter

This?

WindowSplit.png

It's called Split Window / Window Tile or something like that and is a Window Manager functionality (in your case, X on Windows 7/10).
Because frameless Qt toplevel Widgets don't request a Window decoration, I think X does not recognize that you want to snap/split it anyway.
This is probably not doable with Qt only and platform/Window Manager dependent, maybe you need some extension. Haven't found one though.

Edit:
If you are fine with not using the native functionality, you could try to implement something like that using your Qt widget... when enabled, calculate the requested area (1/2, 1/4...) of your screen size and geometry and resize + move your widget accordingly.

@StudentScripter Yes, you can do that. And it shows you how they implemented stuff.

@StudentScripter When you set an item in the model, the model becomes the owner of the item and thus controls its lifetime. If calling removeRows would leave the item(s) it contains intact, you would just have a memory leak by now.

@JonB said:

Which I have always regraded as devil's spawn

Agreed. I see blockSignals() as an advanced tool to be used with great care and only when you're very aware of all consequences in given case. Similar to sender(). Definitely not something to be applied on a "let's see if it helps" basis.

@rsmwall hi and welcome to devnet,

Did you already check the projects I linked (agreed they are non trivial) ?

Do you really intend to create a new DE or do you just need something more fancy than a single window application in which case the Qt Wayland module might be of interest.

@TomZ Thank you, I follow the order you mentioned and it works fine.

if (doSVG) { painter.setFont(fNum); painter.setPen(pNum); painter.save(); painter.translate(c.toPointF()+ b.toPointF() +tit->pos()); painter.rotate(radToDeg(ra)); painter.drawText(- ti->boundingRect().width()/2, -2, QString::number(n)); painter.restore(); }

deplUI6a.png

@SGaist That seems to be the solution, haha! Thanks.

@Turbotroop
OK, so:

Is the code pasted now currently what you have, exactly? What error do you currently have? Have you acted on the previous comments?

For example: although it won't generate a compilation error, it does not make any sense to set up all these boxes or arrays in the main window destructor, does it? Why not in, say, the constructor instead?

@Chris-Kawa thank you, it helped to set the margins!

@jsulm ou! thank you!
you had helped me a lot!!

Hi and welcome to devnet,

That's a bit too vast of a topic to have a simpler answer.

What element of Cyber Security do you have in mind ?
At what level ?
Cyber Security starts from giving people access to certain hardware / applications to the boot process of your machines/devices, the kernel/OS they are running, the applications you are using on them, the libraries that composes these applications, the devices you plug in the machines, etc.

@SimonSchroeder
QDir is only for directories, not for files. So it is not a (suitable) candidate for general "file paths".

@Zwenig die einfachste Methode ist der package manager.

den findest du eigentlich vorinstalliert in der Menüleiste, einfach nach Creator oder QtCreator suchen und installieren.

darüber bekommst du auch eine version von Qt (Bibliothek), sollte neuer als 5.11 sein, also sollte dein Programm damit auch kompilieren

@ELIF Please post the actual compiler/linker error. it is somewhere above of what you posted.

when I rerun, I am told that QtWebView cannot contain more than one item, so I guess I cannot save a c++ class in QtWebView, going through the doc I found that the c++ classes I needed had already been extended to the quick module. So, I'm going to use the c++ classes in this module instead. Thank you very much for your help.

@JonBI don't know if that's the problem, but I downloaded the QWebView module using the maintenance tool but still QtCreator does not recognize it as an existing module.