Subcategories

• General and Desktop

  This is where all the desktop OS and general Qt questions belong.
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  Recently I ran the program at the terminal and found:Debug assertion and cannot seek the string iterator before begin. But I built the program at QT without an error.
• Mobile and Embedded

  The forum for developing everything embedded: Linux, WinCE, Symbian, MeeGo... you name it.
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  Hi, IIRC, you may have to add an entitlement to your app. See here.
• QML and Qt Quick

  Looking for The Bling Thing(tm)? Post here!
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  Okay, so here you go: types.h #ifndef TYPES_H #define TYPES_H #include <QObject> #include <QVector> #include <QVariant> #include <QVariantList> struct Bottle { Q_GADGET Q_PROPERTY(QString name MEMBER m_name) Q_PROPERTY(qreal size MEMBER m_size) public: QString m_name; qreal m_size; }; class DataSource : public QObject { Q_OBJECT public: Q_INVOKABLE QVariantList getData(); }; #endif // TYPES_H main.cpp #include <QGuiApplication> #include <QQmlApplicationEngine> #include <QQmlContext> #include "types.h" QVariantList DataSource::getData() { return { QVariant::fromValue<Bottle>({ "First bottle", 0.75 }), QVariant::fromValue<Bottle>({ "Second bottle", 0.70 }) }; } int main(int argc, char *argv[]) { QGuiApplication app(argc, argv); QQmlApplicationEngine engine; engine.addImportPath(QStringLiteral("qrc:/")); QUrl url(QStringLiteral("qrc:/main.qml")); QObject::connect(&engine, &QQmlApplicationEngine::objectCreated, &app, [url] (QObject * obj, const QUrl & objUrl) -> void { if (!obj && url == objUrl) QCoreApplication::exit(-1); }, Qt::QueuedConnection); DataSource source; engine.rootContext()->setContextProperty(QStringLiteral("DataSource"), &source); qmlRegisterUncreatableType<Bottle>("Example", 1, 0, "Bottle", ""); engine.load(url); return app.exec(); } main.qml import QtQuick 2.15 import QtQuick.Window 2.15 import QtQuick.Controls 2.15 import Example 1.0 Window { id: mainWindow visible: true width: 300 height: 200 title: qsTr("Some title") Component { id: template Text { text: "defaultText" } } Column { Component.onCompleted: DataSource.getData().forEach(function(element) { template.createObject(this, { text: element.name }); }, this) } } PS. QML is damn annoying ...
• Tools

  Have a question about Qt Creator, our cross-platform IDE, or any of the other tools? Ask here!
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  Hi and welcome to devnet, How did you get the sources ?
• Installation and Deployment

  Your Qt just doesn't want to build? Your compiler can't find the libs? Here's where you find comfort and understanding. And help.
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  @gde23 Hi，I encountered the same problem.Can you tell me the solution to this problem？
• Game Development

  What can we say - we like games. And you can use Qt to write some. Questions? Ask here.
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  I built Qt to static release and compressed EXE using UPX. My EXE has only 7 MBytes. But I use pure OpenGL without Qt3D. Cube_OpenGLES20_Qt5Cpp.zip
• Qt WebKit

  Questions about Qt WebKit and related topics? Post here!
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  Re: QML webview delete cookies Hi all, i am new to the Qt forum,so prior apologies for any inconsistent post standards. I am having a very similar problemt as mentioned in the Forum page above. To brief, i am using Qt 5.15 and developing an Android application to show a signin webpage page on QML Webview. Once the user logs in any webview session, the cookies are retained from the page (and maybe the page itself in the cache) and any further calls to the webpage return same session response values and the page doesn't load at all. I tried using Javascript, Dynamic Loading of Webview and even clearComponentCache() from the QQMLEngine but nothing seems to work. Since, it is a very basic need for client side browser settings do we have any clean way of doing the same. P.S: if i tried to implement the first solution mentioned in the abovbe post and on android, i am getting an error: "E chromium: [ERROR:database.cc(1707)] Cookie sqlite error 1032, errno 0: attempt to write a readonly database" I tried changing the QFile::Permissions but in vain. Anobody who can point me in the right direction, Please help!! Thanks in advance.
• QtWebEngine

  Discussions and questions on QtWebEngine
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  I can make a http request with http sites but not https sites. What do I need to include? is it that I need to add some kind of encrypted interaction
• Language Bindings

  You're using Qt with other languages than C++, eh? Post here!
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  @Rodrigo-B hi and welcome to devnet, As already written, the accelerators are not permanently shown on Windows.
• 3rd Party Software

  Combining Qt with 3rd party libraries or components? Ask here!
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  @ronaldon said in PDFhummus error: PDFWriter.h: No such file or directory. I need help to use PDFhummus with QT Creator: @JonB I think I understand now, I shouldn't use PDFWriter.lib, instead i should add to my project the PDF Hummus fonts. It is that true? Hi, As @JonB requested: where is the header of that library located on your hard drive ? That path is missing from your INCLUDEPATH variable.
• Qt for Python

  For discussion and questions about Qt for Python (PySide 2)

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  Hi, setVisible will schedule an update to happen when the event loop can do it. Even loop that you block with your lengthy calculation. You might want to consider using QtConcurrent::run to avoid blocking your GUI.
• Qt for WebAssembly

  Specific issues when using Qt for WebAssembly

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  I can only see in Qt documentation mentioning support for MEMFS and IDBFS. I wonder if Qt wasm has support for workerfs as defined in Emscripten? I am planning to use the https://web.dev/file-system-access/ API together with workerfs to emulate mounting a user directory for use in my wasm application. Do you think it is feasible? Thanks
• Qt for MCUs

  Discussions and questions about Qt Quick Ultralite and using Qt on microcontrollers in general

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  [Duplicate of https://forum.qt.io/topic/124377/pos-pax-s920-qt --JKSH] Hi, I would like to know if is possible to use some version of Qt to create the UI for the POS PAX S920. Here is the full specs: PAX S920 Specs It's an 32 bits ARM11, 64MB DDR RAM and 128MB NAND Flash. I don't know if is it possible. If yes, should this topic be inside the Qt for MCU or in Qt Mobile and Embedded? Thanks
• Qt 6

  This is where all Qt 6 related questions belong

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  Sorry, I was not explicit about the question: Is the serial port and Bluetooth support coming to Qt 6? If yes, is there a rough estimate of when is this scheduled? Is there support for those two coming to Qt for Python? Actually, it was not available in PySide2 and Qt 5. Thanks.