General and Desktop

Hi

please prefer posting your code as text rather than screenshot.

Your questions are a little unclear to me, but if I understand it right, at least for the two first

yes you can safely delete an object from within it's parent or from any other object, however, if you ever want an object to delete itself, I would rather suggest doing this->deletelater() ; no the deleter is not deleted please reformulate correctly

Its possible to sort second table by id and then convert it into tree

@Pl45m4 Functions ( downloadFile and replyFinished) are not in the header. I did not specify that but I did add MyClass scope e.g. void MyClass::downloadFile().

@SGaist So:

MyClass(QObject *parent = nullptr) : QAbstractListModel(parent), m_manager(new QNetworkAccessManager(this)) { connect(m_manager, &QNetworkAccessManager::finished, this, &MyClass::downloadFinished); }

Found the answer in https://forum.qt.io/topic/70575/qt-charts-crash
In main.cpp you should change QGuiApplication to QApplication
QApplication app(argc, argv);

Thanks, Simon.

Here are two bugs for the context:
https://bugreports.qt.io/browse/QTBUG-119912
https://bugreports.qt.io/browse/QTBUG-119913

And the change that removed them:
https://codereview.qt-project.org/c/qt/qtgrpc/+/585992

P.S. The fact you complain about the removal, forces us to reconsider our decision.

@Max said in Managing events of a QScxmlStateMachine:

If the machine is in a particular state, I modify the style of another widget before the hand is sent back to the user

In an event driven application you would react on state machine change instead of posting an event and expecting it to take effect immediately. You should rethink your design.

After some digging through the source code of QAbstractOAuth to see which classes are used under the hood I managed to do it this way:

std:: string json = CalendarJsonParser::writeEventQuery(event); // the Request Body - yes, I'm using the jsoncpp library instead of QJsonObject, for some reason QVariantMap parameters; parameters["calendarId"] = QString::fromStdString(calendar_list[calendarIdx].id); //the Parameters QString urlStr = "https://www.googleapis.com/calendar/v3/calendars/calendarId/events"; QUrl url = QUrl(urlStr); QUrlQuery query; //the query should store the parameters //adding the parameters to the query for (auto it = parameters.begin(), end = parameters.end(); it != end; ++it){ query.addQueryItem(it.key(), it.value().toString()); } //adding the query to the url: url.setQuery(query); //creating request from the url QNetworkRequest req(url); QByteArray verb = "POST"; //POST, PUT, use whatever the API defines //google is my QOAuth2AuthorizationCodeFlow object, so I'm adding the additional token stuff here google->prepareRequest(&req, verb, json.data()); //getting the reply pointer: auto reply = google->networkAccessManager()->sendCustomRequest(req, verb, json.data()); //doing something with the reply connect(reply, &QNetworkReply::finished, this, [=]() { /*implement handling here*/ });

@linuxkid said in Problems migrating from 5.14.2 tp Qt 6.8.0:

Launching the debugger does tell me:

And now learn how to use a debugger and look into the stack trace from where it is coming.

"If the QT_FATAL_WARNINGS environment variable is set, qWarning() exits after printing the warning message. This makes it easy to obtain a backtrace in the debugger."

Not that all is properly written down in the documentation...

I tried with MySQL Server 8.3 client libs + MySQL 8.3 Server, MySQL 8.3 Client libs + MariaDB 10.11 Server, MariaDB C Connector 3.3.2 client libs + MySQL 8.3 Server and MariaDB C Connector 3.3.2 and MariaDB 10.11 Server and all works as expected. I only modifed your example to not create a db in the first place and therefore also don't call db.close() with an open query (which is really a strange usecase and I'm not sure we support it but I guess it's only for the testcase):

int main(int argc, char* argv[]) { QCoreApplication a(argc, argv); QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL"); db.setHostName("192.168.178.64"); db.setUserName("testuser"); db.setPassword("testuser"); db.setDatabaseName("testdb"); if (!db.open()) { qDebug() << "Failed to open database : " << db.lastError(); return 0; } QSqlQuery query(db); query.exec("DROP TABLE `org_data_class`"); query.prepare("CREATE TABLE `org_data_class` (" "`index` int(11) NOT NULL AUTO_INCREMENT," "`equip` varchar(50) NOT NULL," "`command` varchar(50) NOT NULL," "PRIMARY KEY (`index`) USING BTREE" ")DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;"); if (!query.exec()) { qDebug() << "Failed to create table : " << query.lastError(); return 0; } query.prepare("INSERT INTO `org_data_class` (`equip`, `command`) VALUES" "('AAA', 'CMD1'), ('BBB', 'CMD2'), ('CCC', 'CMD3');"); if (!query.exec()) { qDebug() << "Failed to insert data : " << query.lastError(); return 0; } QSqlQuery q("SELECT * FROM org_data_class"); while (q.next()) { qDebug() << db.lastError(); qDebug() << q.isValid() << q.isActive() << q.lastError(); qDebug() << q.value(0) << q.value(1) << q.value(2); } return 0; }

If this testcase does not work for you the only way I see is to try to backport all changes to the Qt mysql plugin to see if this helps somehow (but I can't remember of such a change tbh) or debug by yourself what's going wrong.

@ForeverNoob said in QTreeWidget.itemAt returns wrong item in dropEvent:

Why is that?

It can only be for one reason:

event.position().x(), event.position().y()

these coords are not what you would expect.

The documentation says:

item at the coordinates (x, y). The coordinates are relative to the tree widget's viewport().

So compare that with the position of your correct item

@Pl45m4 said in How to stop a checkable button from automatically rendering differently when checked?:

You could check the source code of QAbstractButton / QToolButton yourself and see how it's done

Better the style he's using to see what triggers the darkening. Otoh when the style does this I don't understand why a QToolButton should behave differently only for his application.

I found, that connecting from a webassembly websocket client to a wss server works with the sshechoclient and sshechoserver example programs by doing a little modification to the sshechocilent program: delete or comment out the parts which relate to security:

// Copyright (C) 2016 Kurt Pattyn <pattyn.kurt@gmail.com>. // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause #include "sslechoclient.h" #include <QtCore/QCoreApplication> #include <QtCore/QDebug> #include <QtCore/QFile> #include <QtWebSockets/QWebSocket> QT_USE_NAMESPACE //! [constructor] SslEchoClient::SslEchoClient(const QUrl &url, QObject *parent) : QObject(parent) { connect(&m_webSocket, &QWebSocket::connected, this, &SslEchoClient::onConnected); // connect(&m_webSocket, QOverload<const QList<QSslError>&>::of(&QWebSocket::sslErrors), // this, &SslEchoClient::onSslErrors); // QSslConfiguration sslConfiguration; // QFile certFile(QStringLiteral(":/localhost.cert")); // certFile.open(QIODevice::ReadOnly); // QSslCertificate certificate(&certFile, QSsl::Pem); // certFile.close(); // sslConfiguration.addCaCertificate(certificate); // m_webSocket.setSslConfiguration(sslConfiguration); m_webSocket.open(QUrl(url)); } //! [constructor] //! [onConnected] void SslEchoClient::onConnected() { qDebug() << "WebSocket connected"; connect(&m_webSocket, &QWebSocket::textMessageReceived, this, &SslEchoClient::onTextMessageReceived); m_webSocket.sendTextMessage(QStringLiteral("Hello, world!")); } //! [onConnected] //! [onTextMessageReceived] void SslEchoClient::onTextMessageReceived(QString message) { qDebug() << "Message received:" << message; qApp->quit(); } // void SslEchoClient::onSslErrors(const QList<QSslError> &errors) // { // qWarning() << "SSL errors:" << errors; // m_webSocket.ignoreSslErrors(); //qApp->quit(); // } //! [onTextMessageReceived]

Important!: If the wss server is running on localhost with fake certs, then in Edge browser, client connecting to the server will work, but not in other browsers. But if your wss server has domain name with valid cert (e.g. type of Let's Encrypt), then it will work in major browsers (Chrome, Edge, Firefox) (I tested, it works). Also, host your client application through https connection, e.g. with qtwasmserver.

After some debugging it seems to be a bug fixed in Qt 6.4. (and backported in 6.2/6.3)
According to the old code, QWebSocketPrivate::processData used to be connected using Qt::QueuedConnection, so it may be called after QWebSocketPrivate::processStateChanged. This means the close frame can be unprocessed, leaving closedCode in 1000.
The commit fixing this is e1c92b57.

@jsulm said in Is there any conflict between QtQuick folder duplicates?:

It's your application, right?

Yes, right.

@jsulm said in Is there any conflict between QtQuick folder duplicates?:

Why should there be a duplicate in your application on user PC?

It's unimportant, this has already fixed. But I need some safe way to load QtQuick from qml folder even if there is a duplicate in the root.

@jsulm said in Is there any conflict between QtQuick folder duplicates?:

How do you deploy your app?

By installer.

There's a whole article on the subject in Apple's documentation under Dynamic Library Design Guidelines.

real sorry .... see these morning "enum QFont::weight" .... so understand.

thanks to all

I filed a bug report and it seems that the bug is identified and solved.
Mni tnx,

BR Henning