General and Desktop

@Pradson said in The inferior stopped because it triggered an exception.: Why am I facing different behavior with same code? Most probably an issue in your code which does not always lead to a crash. But like always is such situations: run your app through debugger and check the stack trace after crash.

@Morbius said in Terminating a application: That's good info, that exit() leaves memory leaks. std::exit doesn't invoke destructors for non-static, non-thread-local objects. Private memory is still freed by process termination in most if not all modern operating systems. Otherwise, a program crashing would also leak. The stuff with connect is cute, but a simpler method is to add a public member to yer MainWindow: [...] This creates a situation where code needs to either be aware of whether the event loop has started, or use this variable and QCoreApplication::quit. https://doc.qt.io/qt-6/qcoreapplication.html#quit provides instructions for signaling the event loop to terminate whether or not it has already started: It's good practice to always connect signals to this slot using a QueuedConnection. If a signal connected (non-queued) to this slot is emitted before control enters the main event loop (such as before "int main" calls exec()), the slot has no effect and the application never exits. Using a queued connection ensures that the slot will not be invoked until after control enters the main event loop.

The issue got fixed after we downgraded Qt6.5 to Qt6.2. After that hang transformed into an internalSslError(). The issue was due to "Windows Secure Channel" coming along with Qt6.5. With Qt6.2, we were able to link the OpenSSL 1.1.1.

Oh, dear, the problem has nothing to do with opencv or video capture. If you add a frame to your QLabel like webcamLabel->setFrameShape(QFrame::Box); You will see that's your QLabel above other widgets, so blocking their mouse events. About the "responsive" top part, that's because QVBoxLayout has default 9px margins. If you add layout->setContentsMargins(0, 0, 0, 0); Then they'll be not responsive at all. So the problem can be easily solved after you learn how to properly use layouts to arrange the widgets and not let anyone block others. I think you are just copying the code from somewhere else, right? The orignal example probably doesn't use ui file and only has an empty window. In your case, I would suggest that don't create the layout and the label in the cpp file, but in the ui file with all the other widgets.

@Christian-Ehrlicher said in Do I need mapTo/FromSource() with QSortFilterProxyModel?: @SamiV123 said in Do I need mapTo/FromSource() with QSortFilterProxyModel?: course in my code I don't interact with the model through the same abstract model interface but use a much better interface But you obviously doing something wrong as you told us. But without code. There's nothing wrong with using an API to deal with your data that doesn't go through some QXYXModel interface.

@anshah You can't rely on fixed sizes because the default font size can be different from one distro to another (or changed by users). [image: Linux1.png] [image: Linux2.png]

@leinad Seems like DirectConnection had something to do with it. Thanks.

@Bob64 Hi, I tried but it is impossible using property source i.e i want to proccess Image form ImageCapture(It captures image from camera). If I debug source value I get this value "image://camera/preview_0" from source property and I can't convert it to QImage.

@BAKI said in I checked an error while running python on Raspberry Pi.: It seems that the Raspberry Pi OS lite version does not support GUI. By default on most Linux distributions X11 does NOT support connections from applications started as root (like you do with sudo). Why are you starting your app as root?

@SGaist Thank you soo very much.

@XiaofengXu Qt Widgets Layout Management

@Renjith-R hello，Have you found a solution later on，to get only the USER environment or only the system environment variable

@SGaist Ok thanks! I will try to do that but I am really not an expert :)

Hi, From the top of my head, you should call resize using sizeHint as input.

for me too only with debug mode this happens onecore\windows\directx\database\helperlibrary\lib\directxdatabasehelper.cpp(652)\d3d9.dll!00007FF80BA4BBD5: (caller: 00007FF80BA4B6DC) ReturnHr(1) tid(6c98) 80004002 No such interface supported onecore\windows\directx\database\helperlibrary\lib\directxdatabasehelper.cpp(652)\d3d9.dll!00007FF80BA4BBD5: (caller: 00007FF80BA4B6DC) ReturnHr(2) tid(6c98) 80004002 No such interface supported

@jsulm Okay, I'll try that. On Linux though, are the screen names typically the connectors? If so, they'd be unique enough for me, since this application is Linux only.

@mrjj thank you