General and Desktop

Ok. Yes, compiling QT5 on my own without wayland would be a solution, although a bit inconvinient one. Nevertheless, I will try it! Thank you all!

I might dig into the Qt source and see if there is some way to hack it to the surface via subclassing. I'll post here if I actually figure out a way to do it.

@Wasee try to build your program with tool-chain of your another linux system. or Cross compile your program according to another linux system architecture

@jsulm how can I link the qml file to the Qt Quick test project. I tried with same way as I link cpp file earlier, but its not working.

@Jared-Zhou I don't know how it works/what you can do about it, but just to say I assume this is to do with RTL reading/display of the Arabic string, and it somehow being detected as containing some non-Arabic characters and (unfortunate) different handling between QLabel versus QPushButton. I assume if you replace that QTE. with some Arabic characters they both display the same, correct way.

@RetroZelda I don't know why you have a problem, but since you say "so its solved as far as im concerned" I won't spend further time investigating. But I do just want to say this is not an issue to do with Qt Creator/Designer. That simply ends up generating C++ code (when uic is run during build) which calls Qt libraries to do the work.

Hi, You can substract two paths: int radius=100; QPainterPath path; path.addEllipse(rect().center(),radius,radius); QPainterPath recPath; int recW=radius/2; QRectF rec=path.boundingRect(); rec.setSize(QSize(recW,recW)); rec.translate(0,radius-recW/2); recPath.addRect(rec); path=path.subtracted(recPath); // substract rect from ellipse painter.fillPath(path,Qt::red);

@J-Hilk I had the time now to try out your example. It works indeed as expected. There must be something in my code that prevents the application from working as expected, perhaps a side effect of something that I have not found yet. I will further investigate. Ralf

@pengxu I would look at reimplementing your Widgets hover events, mousemove events, enter/leaveEvents or even event/eventFilter to set your cursor, if you are finding provlems with what you have now. For hover events, at least, you could also implement your desired cursor via stylesheet, which may work better than what you have now in code.

@IknowQT You can anymate any properties of a widget (like size) without custom classes using https://doc.qt.io/qt-5/animation-overview.html. In that link you can even see some examples. What exactly do you want to animate?

@Swati777999 said in Connecting to Database in Qt: I didn't get your point clearly We are talking about absolute C++ basics now! Please learn those! bool DbManager::addEntry(const QString &name) { ... QSqlQueryModel model; ... } In the code above "model" only exists inside DbManager::addEntry. As soon as DbManager::addEntry is done "mode" goes out of scope and is deleted! Also, I see that you do "return success;" before you create your model - how can this work at all?!

What you could do is to show more of your code / .pro file. A guess in the dark is to add QT+=network to your .pro file.

@Swati777999 said in main.cpp Vs mainwindow.cpp: As it is not mentioned which sections of these codes will go to which files; MainWindow.cpp, main.cpp, or mainwindow.h , it creates trouble for beginners There are tons of example Qt applications linked in Qt documentation. You should really take a look...

@ChrisW67, yes, now I get that file save dialog. I also get this message in Qt Creator output Invalid parameter passed to C runtime function.

@GRS26 said in Problem while trying to build fritzing: or maybe is a linking problem As I said - you need Qt 5.14 or higher since - as you can see when you follow my the link in my first post - the used enum is only available in Qt 5.14 and up. Or ask the developer of your app you're trying to compile to add support for your ancient Qt version.

Hi, One side note: unless you try to open your database on a read-only filesystem where the file does not exist, you won't have any error. This comes from SQLite, if the database file does not exist, it's created.