C++ & Qt

15 Dec 2022 12:20

Welcome to the group, @cesargastonpe! :-)

Wanna share your story of how you started with Qt, QML or C++? Maybe some nice feature that made you stick with it.
Rules are set on the description of the group. :)

C++ & Qt

14 Dec 2022 13:05

That's why you can always ask here!

C++ & Qt

14 Dec 2022 05:29

And then you need to set the text in QLineEdit to upper, of course.

C++ & Qt

14 Dec 2022 05:25

The second parameter in addDatabase() indicates the connection name, not the filename. You can set the filename with db.setDatabaseName(filename); before opening the database. That should work.

C++ & Qt

13 Dec 2022 23:19

Come on, do not post the same thing on all topics. If you're proramming with Qt Widgets, post it only in here.

C++ & Qt

13 Dec 2022 20:06

so far I have tried
auto var = ui->LineEdit->text()[0];
var = var.toUpper();

C++ & Qt

13 Dec 2022 17:55

but that is unrelated to calculating the transfer speed... did you have a working code without the transfer speed calculation?

C++ & Qt

13 Dec 2022 16:57

server.cpp

while(socket->waitForReadyRead()){
buffer.append(socket->readAll());}

C++ & Qt

13 Dec 2022 13:24

Question regarding multiple qml engines

Qt Quick has QQmlEngine and QQmlContext. We can create multiple context such that the cpp objects have specified scope in qml. Can we create multiple engines? If we can create multiple engine whats the use case? And lastly.. whats the pros and cons of creating multiple engines?

C++ & Qt

13 Dec 2022 06:44

If a template class A
template<typename T> class A;
it has a friend template operator ==
template <typename E> friend bool operator ==(const A&,const A<E>&){…}
But in my project I haven't called this function in the code, So this code will not be generated by the compiler in the end. Even though underlying type T or E isn’t overloading operator ==, this code should pass compiler check. But Qt6 will generate some code by moc to check these types have some function or not, It seems that moc can't determine whether the code is finally generated by the compiler.

C++ & Qt

12 Dec 2022 13:43

Well, you remember the time when the transfer is started, and you count the bytes written to the socket... then, at any time you can divide the amount of transmitted bytes with the amount of passed seconds and get B/s... That would get you the average speed of the whole transfer. If you want the current speed, you need to reset the byte counter and start counting from 0 every time interval you want to measure.

C++ & Qt

12 Dec 2022 11:55

you use tcpServer->write(byteArray) I suppose.... So you just sum up byteArray.length()

C++ & Qt

12 Dec 2022 11:53

well, you count the data bytes you transfer and divide that by the time of the transfer

C++ & Qt

11 Dec 2022 19:49

Qt location went away with the move to Qt 6, however Qt 6.5 may bring back Qt Location, however it isn't guaranteed yet that it will be released with Qt 6.5.

Also, the API will/has change(d) substantially.

More info here:
https://www.qt.io/blog/the-road-to-qt-location

C++ & Qt

11 Dec 2022 17:54

The default parameter of listen for the host address is QHostAddress::Any, so it listens on all the network interfaces for both ipv4 and ipv6. Make sure you use the same port number for the socket that server is listening to.

C++ & Qt

15 Dec 2022 10:00

Hi, when I use the QPushButton press signal, it works fine with the mouse, but it doesn't work properly with touch, please guide me.

C++ & Qt

14 Dec 2022 08:59

thanks so much. I can't believe I didn't catch this before

C++ & Qt

14 Dec 2022 05:29

QString upper = lower.left(1).toUpper() + lower.mid(1)

C++ & Qt

14 Dec 2022 04:47

My QSQLite database initialized w/o error, but it doesn't write to disk? What do you think is going wrong in my init file ?

C++ & Qt

13 Dec 2022 23:16

Connect the textChanged signal to a function that makes the first character uppercase

C++ & Qt

13 Dec 2022 20:05

How do I always change the LineEdit first character to uppercase

C++ & Qt

13 Dec 2022 16:57

I try to implement that you say...but server doesn't read & error occurred.

C++ & Qt

13 Dec 2022 16:57

client.cpp
QByteArray byteArray = str.toUtf8();
byteArray.prepend(header);

int bytes_written = 0;
while (1){
if(bytes_written == byteArray.size()) break;
int written = socket->write(byteArray.mid(bytes_written,1),1);//1Byte
bytes_written += written;
socket->waitForBytesWritten();
}

C++ & Qt

13 Dec 2022 06:47

Is this some defect of moc or correct behavior?

C++ & Qt

12 Dec 2022 13:59

Hi, Why space between two widget? what problem?

C++ & Qt

12 Dec 2022 12:03

like this...speed:1.33MB/s

C++ & Qt

12 Dec 2022 11:54

how count data bytes that transfer?I have no idea:(

C++ & Qt

12 Dec 2022 11:48

Hi friends.Im' beginner. my project is sending video from QTCpServer to QTCPclient . I'm want to know data transfer rate when sending & show it . I don't know to implement code of data transfer rate in sending file.Can you help me?

C++ & Qt

11 Dec 2022 19:38

If you want maps, you can use QtLocation which has esri, open box map providers. (They are provided as a plugin to QtLocation module)
Unfortunately Google isn't one of the provider. Luckily you have a third-party provider plugin for Google maps which you can try using with QtLocation. Below is the repo link.

https://github.com/vladest/googlemaps

C++ & Qt

11 Dec 2022 17:38

It is working only with 127.......