General and Desktop

I don't know why but if i use just setLine(QLineF(myStartItem->pos(),myEndItem->pos())); instead of setLine(QLineF(myStartItem->pos()+p,myEndItem->pos()+p)); //p is abitrary point it works just fine, doesn't flashes and it makes no sense to me

@ripley said in how to set save variables into a QList iterating it?: QList<QLabel> First this won't work - you can save a pointer to an object in a container but not the object itself. Second - you want a vector, not a list Storing them in a loop is possible but I don't think it's really needed for three elements for (QLabel *l : {variable_1, variable_2, variable_3}) list.push_back(l);

I have the exact same issue #include <QtWidgets/QApplication> #include <QtWidgets/QTextEdit> int main(int argc, char* argv[]) { QApplication a(argc, argv); QTextEdit textEdit; textEdit.show(); return a.exec(); } Just this is enough to make QTextEdit lag like @legitnameyo said. Maybe because of different hardware but on my PC it takes about 0.5 seconds before something appears in the text edit. EDIT: yes it happens even in Release mode without a debugger attached Qt: 5.13.0 msvc2017_64

Hi Any widget you add in the designer is accessible via ui->widgetname So if you place your code after setupUI in constructor then you can just use it like any normal pointer that you new'd yourself

Hi, In addition to what @mrjj suggested, you likely want to model that with a statemachine.

Hi, here is the attachement of qt version,compiler and error(which i am getting)[image: 48f92640-1c1f-444d-94f0-404aaa8854a5.png][image: af8a3889-077b-4e6d-ae0f-524da8a9ff97.png] [image: 2640002d-9ead-45cf-88ed-4ba2cb5347ce.png] please go through that,if i talk about Device means Yes I am using the embedded,beagleboneboard(device connection is this board only,in command prompt I connected that using :"ssh debian@192.168.7.2").

@sgaist I solved: [image: 7ff0b869-05bb-41d9-90f9-42178f416819.png] Thank you very much!

Hi, That's because you are on macOS. The system natively supports printing in a PDF.

Hi and welcome to devnet, What version of Qt are you using ? What OS are you running ?

Hi, Are you sure you built the qtserialport module as part of your static build ? Did you check the content of the lib folder of your build ?

I would add something like QWebSocket::setBindAddress(const QHostAddress &address, quint16 port = 0, QAbstractSocket::BindMode mode = DefaultForPlatform) which could then be used in QWebSocketPrivate::open()

Then the way to go would be TCP for IPC with QDataStream with good protocol or shared memory. I dont know which WindowManager is suitable Windows for the different processes. Maybe as good starting point for study is https://doc.qt.io/Neptune3UI/neptune3ui-overview.html, the source code is available in Github. Be aware is for Linux and not Windows.

@shuga said in dataChanged API causing stack overflow when moving from QT5.12.1 to QT5.12.4/QT5.13: the API "dataChanged" is not returning correctly You may need to post some code snippets, we're not magicians... Please show how you're connecting such signal "dataChanged" and what the slot is doing. Also information about OS version and compiler used would be helpful

One other possibility would be to implement your own QAbstractListModel on top of your object list. That way you would directly manipulate the structure without additional back and forth of your data.

I solved this problem and post a generic solution here: https://forum.qt.io/topic/106344/qlistwidget-dragdrop-event-signal/5

@shazter The way you manage errors are IMHO depending of the context of the application and how you want it to behave. I don't think a method is better than another.

@sgaist Hello, I found a work around. And removed the border image entirely. Then used a QLabel to place the image exactly where I want it.

Yes, I saw this one pager, but is describes more the other features instead of the request and response feature. I hope he will create a new blog soon with some small examples how to use.