And as you mentioned that I used c-style cast, I read C++ doc and learned about C++-style cast that I didn't knew. So what I need to use is static_cast and my code becomes

TitleItem * ti = static_cast<TitleItem*>(parentItem());

Well I think that this first publication of mine is now solved. Thank you.
I also learn that a post can only be edited 3600 seconds after it is submitted.

@manel-sam said in Serial data received:

So the append I should do it where§?

Create a member variable in your imu class.

// _packetData member variable of imu _packetData.append(serialPort->readAll()); if(_packetData.size()>=PACKET_LENGTH) { // packet complete qInfo() << QStringLiteral("data size is : ") << _packetData.size() << " octets"; qDebug() << "Serial received " << _packetData.toHex(); // go ahead with this packet QDataStream stream(_packetData); // Read The BigIndian value stream.setByteOrder(QDataStream::BigEndian); qint16 headerSignature; stream >> headerSignature; }

You may also check the data received don't exceed PACKET_LENGTH, cause it means you have already received data from the next packet. (it may be irrelevant in your case, I don't kown)

@Christian-Ehrlicher it's printed

@gouneken

multiple inheritance of QObject isn't possible (Page_all class) your Page_all class inherits QWebEnginePage and also has a QWebEnginePage as a member variable?! dont name variables the same as their type names!

the createWindow() method is intended to create a new physical window (a QWidget for example) and return the containing QWebEnginePage. You might need to create another QWebEngineView inside (or a use it directly as a window)

@gouneken said in how to enable using QWebEngineWidgets module after downloading?:

I'm using a module from another version of qt or something else

You, of course, have to install it for Qt version you're using

Understood. Thanks for your responses @artwaw and @JonB .

@Rhutu
Nothing should "vanish". If you overwrite what is in QTableWidget with something not as you intended then obviously it will cease to show whatever it showed before.

If you need to pass additional data from your main window to the slot, you can either do it via a C++ lambda for the slot, or put a slot which is in the main window instead of Obj,SLOT(WriteToFile()), and have that call Obj->WriteToFile(extra).

Stop using old-style SIGNAL/SLOT() macros for signals/slots, use https://wiki.qt.io/New_Signal_Slot_Syntax, it's better and it will help you connect correct things.

@Jerwinprabu Thank You. It is working fine now.

Hi @Geeva,

@Geeva said in JSON with multi tasking:

@JKSH Thanks for solving basic confusion. I have one more doubt also. Here, I have attached program for verification. I hope you can provide a proper solution

You're welcome. I'm happy to teach you basics. However, verifying your program is too difficult to do on a forum.

You need to do 2 things:

Take C++ lessons Practice writing and debugging simple programs for your hardware

Hi,

there are 2 possible cases:

If you are sure that void DistanceThread::run() exit after first iteration then you are setting "flagforbreak" or "diststop" in between. So could you please check the slots of those signals which you are emitting? (May be the flag set from there).

DistanceThread::run() is still executing but your conditions (i saw complex nested "If"s there :) ) may not meet anytime.(Hope U will debug it ensure that.

Regards,
Rajeesh Raveendran