General and Desktop

@fritzw This didn't work for me I also had to add a flag for bypassing window manager, and worked fine if I set the geometry before widget.show() also didn't had to adjust the geometry for the taskbar(tested for KDE only) pyqt5 code: a = QApplication(sys.argv) widget = QLabel(None) widget.setWindowFlags(Qt.WindowStaysOnTopHint | Qt.X11BypassWindowManagementHint) allScreens = QApplication.desktop().geometry() self.setGeometry(allScreens) widget.show() a.exec()

@Calicoder You also need to understand why you need to cast (you can also use dynamic_cast). Parent has no getValues() method, so you need to cast the pointer to ChildB to be able to call this method. And of course you need to check the pointer after casting as parent is not going to always be ChildB instance.

I got it. Thanks a lot.

@seok There are lots of Google hits for qgraphicsview rubber band zoom. There is an old thread at https://www.qtcentre.org/threads/12836-Graphics-view-rubberband-zooming which says: Setting the drag mode as Rubberband drag, you will only be able to select items based on the selection. To implement the zoom based on rubberband, u will need to implement ur own rubberband. For this u need to catch the mouse events in scene or view. Based on this, once u get the rectangle after rubberbanding, u just nee to call fitInView() function. So I don't know if this is what you had in mind. I didn't read through the other hits, but I would if that is what I wanted to achieve.

Thanks for replying, I managed to get it using the following command. [root@localhost ~]# ln -s /usr/lib64/libGL.so.1 /usr/ lib/libGL.so (solution link: http://c.biancheng.net/view/3901.html)

@leonmarker Can you please explain in an understandable way what you want to do and what the problem is?

@SGaist Hi, We are using rtx2080ti with cuda 11.5 with driver version 495.29.05

I've created a QThread object inside myClass and started the thread upon invoking myClass.recvFromQML(..). It solved the freezing issue. Thanks

@JKSH said in Qt Basics and Selection of Base class: @Swati777999 said in Qt Basics and Selection of Base class: Yes, it worked for me. Thanks. :) Great! Can you now explain why it works? this points to the parent object of the constructor. To display the contents of primWin widget , it has to be set as the central widget of the Qmainwindow.

@Pythonic-person said in Widgets with SizePolicy there is no effects: Do you mean taking the main window size and then change the widget size with the code? You either use one of the provided layout mechanisms, develop you your only layout implementation, or you do all the resizing of contained widgets yourself 1990's style. If you wish to do it yourself then you need to override the resizeEvent() of the container widget and resize the contained widgets yourself using whatever logic you see fit.

I figured it out. Instead of using toPlainText to get the data I use to Html and store that. Works like a champ. Thanks again SGaist.

Hi, A minimal compilable example would be nice for the bug report. Did you also check with Qt 5.15.0 and 5.15.1 ? Just in case it something that changed with 5.15.2.

Hi, Either subclass QScrollBar and reimplement the paintEvent method or QAbstractSlider.

Hi, If you properly installed it, the same way as any other Qt module.

Where are you using that painter ?

Hi, If you want to have that handled for you, you need to use layouts.

@Kaguro said in QUdpSocket broadcast messages with more ip address: If someone has more IP addresses (for virtualmachine etc...) then they didnt get any messages but if some has just one ip address then he could send messages to everyone and recieve from everyone. If we set QHostAddress::Broadcast to 10.0.10.255 (this is our IP range) then everything is working correctly for everyone. Sounds like you didn't bind to the correct address on the receiver side. So the question is how does it work? Well, you could use a multicast group with UDP, to mix and match the different interfaces you have defined.