@hskoglund hi~Thank you for your help! I'm sending a qt setTimeout() signal to change IE11 window size and ActiveQT window size now. What's wrong with the javascript ? Why doesn't it change? the following code. class osgActiveGLQT : public QWidget,public QAxBindable { Q_OBJECT Q_PROPERTY(QString WindowSize READ getWindowSize WRITE setWindowSize) public: osgActiveGLQT(QWidget *parent = 0); QSize sizeHint() const { return QWidget::sizeHint().expandedTo(QSize(100, 100)); } QString getWindowSize() const { return _strWindowSize; } private: //Ui::osgActiveGLQTClass ui; signals: void signalFromQt(QString); public slots: void setWindowSize(const QString &string); void resetWindowSize(const QString &string); public slots: void setTimeout();// this one we call from Javascript private: QString _strWindowSize; bool _isFullScreen; private: QPushButton* _windowSizeButton; }; osgActiveGLQT::osgActiveGLQT(QWidget *parent) : QWidget(parent), _strWindowSize("0,0"), _isFullScreen(false) { if (this->objectName().isEmpty()) this->setObjectName(QStringLiteral("osgActiveGLQTClass")); //this->resize(900, 600); _windowSizeButton = new QPushButton(this); _windowSizeButton->setObjectName(QStringLiteral("windowSizeButton")); _windowSizeButton->setGeometry(QRect(10, 5, 75, 23)); _windowSizeButton->setText(QString::fromLocal8Bit("FullWindow")); connect(_windowSizeButton, SIGNAL(clicked()), this, SLOT(setTimeout())); } void osgActiveGLQT::setWindowSize(const QString &string) { if (!requestPropertyChange("WindowSize")) return; propertyChanged("WindowSize"); _strWindowSize = string; int curIndex = _strWindowSize.indexOf(","); QString wid = _strWindowSize.mid(0, curIndex); QString hei = _strWindowSize.mid(curIndex + 1, _strWindowSize.length()); // // //resize(wid.toInt(), hei.toInt()); //update(); } // void osgActiveGLQT::resetWindowSize(const QString &string) { QString strWindowSize = string; int curIndex = strWindowSize.indexOf(","); QString wid = strWindowSize.mid(0, curIndex); QString hei = strWindowSize.mid(curIndex + 1, strWindowSize.length()); // //QMessageBox::information(this, "About QSimpleAX", strWindowSize); //resize(wid.toInt(), hei.toInt()); //update(); } void osgActiveGLQT::setTimeout() { _isFullScreen = !_isFullScreen; if (_isFullScreen) { QRect rct = QApplication::desktop()->availableGeometry(); static int screenWidth = rct.width(); static int screenHeight = rct.height(); QTimer::singleShot(150, [this] { signalFromQt(QString::number(screenWidth) + "," + QString::number(screenHeight)); }); _windowSizeButton->setText(QString::fromLocal8Bit("resetWindow")); } else { int curIndex = _strWindowSize.indexOf(","); QString wid = _strWindowSize.mid(0, curIndex); QString hei = _strWindowSize.mid(curIndex + 1, _strWindowSize.length()); static int screenWidth = wid.toInt(); static int screenHeight = hei.toInt(); QTimer::singleShot(150, [this] { signalFromQt(QString::number(screenWidth) + "," + QString::number(screenHeight)); }); _windowSizeButton->setText(QString::fromLocal8Bit("fullWindow")); } } <object ID ="osgActiveGLQT" HSPACE="0" VSPACE="0" WIDTH="900" HEIGHT="600" CLASSID="CLSID:B0545661-8607-43BA-A1C2-B43C0A93D976"> <PARAM NAME="WindowSize" VALUE ="900,600" /> [Object not available! Did you forget to build and register the server?] </object> <script language="javascript"> function osgActiveGLQT::signalFromQt( Message ) { //alert ("Got a signal from Qt: " + Message); var curIndex = Message.indexOf(","); // var widthFormQt = Message.substr(0,curIndex); var heightFormQt = Message.substr(curIndex+1, Message.length); // document.getElementById("osgActiveGLQT").style.WIDTH = widthFormQt; document.getElementById("osgActiveGLQT").style.HEIGHT = heightFormQt; var IntwidthFormQt = parseInt(widthFormQt); var IntheightFormQt = parseInt(heightFormQt); window.moveTo(0,0);// window.resizeTo(IntwidthFormQt,IntheightFormQt);// var strWindowSize = "window.resizeTo(" + widthFormQt + "," + heightFormQt + ");"; //osgActiveGLQT.resetWindowSize(Message); } </script>

@ACollins Is it same if you remove Qt.ItemIsTristate ?

@Forfunckle said in Rectangle Item stops getting hover events: How can I implement a mouse press - mouse move event system? Override https://doc.qt.io/qt-5/qwidget.html#mousePressEvent, https://doc.qt.io/qt-5/qwidget.html#mouseReleaseEvent and https://doc.qt.io/qt-5/qwidget.html#mouseMoveEvent Also set https://doc.qt.io/qt-5/qwidget.html#mouseTracking-prop Example: https://doc.qt.io/qt-5/qtwidgets-widgets-scribble-example.html

@AliM93 said in query value to variable?: maybe you can type like this srst= ui->label->setText(.. ), in this way you can even modify you variable just typing the new one, or maye you need to include into Thank you very much

@mzimmers great you found it! But paintEvent itself should not be called that much regularly! I suspect your logo is being resized (wiggles) all the time!

@artwaw said in QtPDF not availabel on mac?: I checked that QtCharts are now also a pricey addon As far as I remember QtCharts has always been an add-on (or GPL). You really have to be careful with licenses. For commercial software you can use the LGPL-part of Qt. If you are using GPL-modules all your software needs to be under the GPL (meaning everyone who gets your software has also a right to get your source code). So, as long as your software is not GPL you cannot use either QtCharts or QtPDF. (Unless you pay for the commercial license.)

Try updating to Qt 5.14.2, maybe it is some Qt issue and has been fixed? And another thing, although it should not have any influence: try running windeployqt from your deployment dir, not from Qt's bin directory.

We have identified the source of the issue and working for the fix. Fix should be in production really soon.

Qt include dirs are already marked as system includes dirs when using imported targets - at least on windows and linux. So make sure to use a recent Qt and CMake version.

@bwylegly , With me, I use StactView for change many views. You can try it, refer document here: https://doc.qt.io/qt-5/qml-qtquick-controls2-stackview.html

Sounds like a QEventLoop. But it will somehow block the thread nevertheless. If you really want Qt to "keep processing things", asynchronization like signals and slots may still be the best way.

@HrishiGobler set style sheet to it setStyleSheet("border: none;"); But it may affect some other styled appearance.

@SGaist The StackOverflow entry explains it better than I could but essentially, GCC can build a shared library that is executable if it includes main(). Qt Creator is OK with trying to execute it and it works, Terminal will try to do whatever the user tells it and it works. The GUI launcher is apparently smart enough to check the file type before it tries to execute and doesn't want to execute a shared library. Apparently, the default for the version of GCC that I ended up using is to build this kind of file unless you include the -no-pie switch on the linker.

Did a minimal example for you guys today: #include <QCoreApplication> #include <QObject> #include <QWebSocket> #include <iostream> class Client : public QObject { Q_OBJECT public: explicit Client(const QUrl &url); ~Client(); void connect(); void send(const std::string & message); private Q_SLOTS: void onConnected(); void onClosed(); void onError(QAbstractSocket::SocketError errorCode); private: QWebSocket * m_webSocket; QUrl m_url; }; Client::Client(const QUrl &url) : QObject(), m_url(url) { m_webSocket = new QWebSocket(); QObject::connect(m_webSocket, &QWebSocket::connected, this, &Client::onConnected); QObject::connect(m_webSocket, &QWebSocket::disconnected, this, &Client::onClosed); QObject::connect(m_webSocket, QOverload<QAbstractSocket::SocketError>::of(&QWebSocket::error), this, &Client::onError); } Client::~Client() { delete m_webSocket; } void Client::connect() { m_webSocket->open(m_url); } void Client::send(const std::string & message) { qint64 numbytesWritten = m_webSocket->sendTextMessage(QString::fromStdString(message)); std::cout << "Wrote " << numbytesWritten << " bytes" << std::endl; } void Client::onConnected() { std::cout << "Connected" << std::endl; } void Client::onClosed() { std::cout << "Closed" << std::endl; } void Client::onError(QAbstractSocket::SocketError errorCode) { std::cout << "Error: " << errorCode << std::endl; } int main(int argc, char ** argv) { QCoreApplication app(argc, argv); //QUrl url("ws://echo.websocket.org"); QUrl url("ws://thisisnotavalidurl.com:5000"); Client client(url); //client.connect(); client.send("Test message"); return app.exec(); } #include "main.moc" If you do the invalid url and try to connect the error callback is called, so that works. However, if you run it it as is above, without connecting, the error callback is never called. I can only conclude that send is not even an async operation in Qt and they intend for the return value to be the only indicication.

Grazie per le risposte, ne approfitto per fare altre due domande, garantisco che sono le ultime :) Avevo sentito voci recenti che dicevano che volevano far diventare a pagamento le librerie Qt, com'è andata a finire questa storia? Parlando di Embedded, se lo sviluppo su IOS/Android non è considerato tale e nemmeno lo sviluppo su Raspberry, cosa intendono per embedded? Forse i device che non hanno un sistema operativo che ci gira sotto? Grazie.

lvc needs to be defined as a context property before the qml engine call of load

Are all signals on objects going this route or just Connections objects?

My OS is Debian Buster With sudo apt-get install qtcreator. i installed the IDE After that, i downloaded the the openNN package from GitHub and stored it somewhere in my home directory. Then i opened the the demo-file iris_plant.pro

It might simply comes from rect dimension to not be defined.

Well keep in mind two things first PEP-8 is not an actually good set of standards as they contain of lot of nonsensical items that have nothing to do with creating quality code and have more to do with restricting someones style to fit someone else's view of what should and should not be -- these kind of standards are rarely ever good standards as basic standards should leave room for style flexibility while covering all those things that are actually good coding practices which those standards also do not fully cover Next Python-Qt is not pure Python code which is what PEP-8 only applies to and this is just an example of why they are not good standards to follow and/or should be taken with a major grain of salt and only use those things that are actually good generic programming practices as opposed to some self-opinionated preferences. Now if you feel a need to follow PEP-8 as if it were created by some gods then go ahead just know that within Python-Qt there is a statement that if you do not import your Python-Qt files first that (especially in multi-version settings) you may end up with incorrect file associations and all the issues that go right along with that. Oh as a secondary note I had someone once tell me that those standards are a must to use by anyone and everyone using python and I simply said not if they are not required to do so by whomever is signing the paycheck and again frankly if some company asked me about those standards I would give them my honest opinion which is not to use them as is -- not saying all of it is bad -- but it truly is not something I would adhere to by any stretch of the imagination unless the guy signing my paycheck said I had to which they often do not. Further if you step into a house that did not use PEP-8 for there coding standards (as they did not consult the gods that forbade this) then you would do a much better job if you figure out their standards (if any) and adhere to these so all the code remains having the same look and feel. BTW you might be surprised to find that this happens (not using PEP-8) more often than not because other experienced software engineers feel the same way I do in that those are not good standards due to their heavy incomplete bias On a slightly different note -- I think there actually would be a much cleaner and more concise manner to setup a primary file whose job is to determine what set of code to call based on various criterion and then encapsulate the various functionalities as completely autonomous units. Also if the purpose of all the code is to determine if you have missing code libraries and to determine which program to actually launch then -- I am definitely sure I can help you design a much cleaner process than you currently have and do not think it would require a lot of re-coding just some adjustments and clean ups an encapsulating

@Mikeeeeee This really isn't very hard. You originally showed qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found. This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem. Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vnc, wayland-egl, wayland, wayland-xcomposite-egl, wayland-xcomposite- You ran a program to get this. I don't know whether it was Qt Creator or your own application, but it was one of them, whichever. Right? As we have already told you: Open a console/terminal. Type: export QT_DEBUG_PLUGINS=1 Type the path to Qt Creator or your own executable to run it. Whichever one caused your original error. At this point you should get your error again, but this time the environment variable should cause debug output, stating which it can't load "xcb".

You can also check out the swag project https://github.com/a-team-fr/swag, it is a small project so quite easy to step in but yet it is covering a significant number of topics (coupling with cpp/qml, dynamic creation of element, multimedia, networking...). I am the only contributor so I would be very glad to welcome and assist you in your Qt journey !

What OS are you on ?

May be you might want to look at this example provided on the git (Same Example) [https://github.com/qt/qtremoteobjects/tree/dev/examples/remoteobjects/simpleswitch](GIT by Qt)

@SGaist I'm not currently sending that. New project. I suppose I could just use a linux message queue and have thread in the app that listens for it.

Very probable. The only plugin always shipped with Qt is SQLite.

@Mr-Workalot Should i add this code segment in my main.cpp or mainwindow.cpp or mainwindow.h ?? Thanks for this.

Does the python version use the same version of Qt ?

None, forums are not for feature request. You can do that on the [bug tracking system](https://bug reports.qt.io). Some recommendations: be precise give as much details as possible provide references to support your use case

Why are you installing Qt Creator independently since it's installed along Qt when using either the online or offline installer ?

Hi, There's no move semantics involved especially between threads. Qt copies the data you pass as parameter(s) of your signal.

Hi and welcome to devnet, Did you already look at the macOS part of Qt's documentation ?

Grazie mille proverò

Non e' una funzionalita' inclusa in Qt, la libreria piu' promettente sembra essere https://github.com/galkahana/PDF-Writer