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@Christian-Ehrlicher I thought that I had them, but I will check again.

@SGaist . Sorry. I am running ubuntu 22.04 wayland and Qt Creator 13.0.2 based on Qt 6.6.3 (GCC 10.3.1 20210422 (Red Hat 10.3.1-1), x86_64)

I now filed a KDE bug about this compiling everything I could find out: https://bugs.kde.org/show_bug.cgi?id=489516

Were you able to find a solution to this? Currently stuck on this. I see my soundcard when doing aplay -l and arecord -l. I am also able to play audio with gst-launch-1.0 playbin. Alsamixer shows me an entire array of controls. However, Qt doesn't seem to recognize this.

@jeremy_k said in Console App how to populate a 10.000*10.000 Grid efficiently?: A easy optimization for setting a quadrant or an entire 2d space as a single color is to remove all subtrees of that tree, Absolutely. If that's the sort of thing you want to do. Doesn't seem to relate to toggling the state of 100,000 adjacent bits in 5 million. it stores all squares that shall be changed in a vector. The squares changed can be anywhere in this big map, eventually reaching many millions of squares needed to be changed at onces. If that is what you need to do, again I'm not sure I see any use of these quadtrees. But only you need the exact situation.

@l3u_ Undefined Behavior can also mean that code which "shouldn't work", does 7/10 times what your actual intention was (even though the code is wrong) and crashes 3/10 times. This still doesn't make the code correct, even if some resulting behavior leads to crashing your program while the other "seem" to work.

Hello, I reply this old topic but I could not find a solution for a problem. I want to set the padding of the text editor to zero. textEdit->document()->setDocumentMargin(0); as @mpergand said this works. However when I try to design application for different platform a problem occurred. On the mac the text is fit all the width of the texteditor, but in android there is always a small space at the end. Both text editors' width set to 150, on mac 45 of letter i can fit, on the phone 44i can fit and the small space. MAC [image: eda211d0-d08f-4d81-b24d-a28fa8c25b77.png] Android phone A34 [image: de938eab-51c8-47ea-bc4d-364b19e211c3.png] I tried all the below , none of them works part of the code: QTextDocument *doc = textEdit->document(); doc->setDocumentMargin(0); doc->setIndentWidth(0); textEdit->setContentsMargins(0,0,0,0); // textEdit->set QTextCursor cursor(doc); // Select the entire text cursor.select(QTextCursor::Document); // Create a character format and set the font style QTextCharFormat format; // QFont font("Arial", 12, QFont::Bold); // Example: Arial, 12pt, bold format.setFont(timesFont); // Apply the format to the selected text cursor.mergeCharFormat(format); // Set block format to ensure no extra margins QTextBlockFormat blockFormat; blockFormat.setBottomMargin(0); blockFormat.setTopMargin(0); blockFormat.setLeftMargin(0); blockFormat.setRightMargin(0); cursor.setBlockFormat(blockFormat); textEdit->setTextCursor(cursor); Why there is a difference ?

Hello, @Alexey_Golubev ADP Vantage Hcm To fix the touchscreen issue, add these lines to ~/.profile: export QT_QPA_PLATFORM=linuxfb export QT_QPA_FB_TSLIB=1 export QT_QPA_GENERIC_PLUGINS=tslib Then, reload the profile and launch your program: source ~/.profile /home/pi/Qt_Projects/kiab/kiab I hope this information will be helpful for you Best Regards Chris Wright

I do see two blue rectangles sometimes with Qt 5.15.3 and Qt 6.7 under Ubuntu 22.04, Xorg (not Wayland), but no overlapped blue rectangles(artifacts in your images). There is only one left after resizing. No single change in your code.

@thomas_arri said in Qt 6 with MSVC 2022: The problem i have is to deal with <QUiLoader>. Header file is not found! Then you should do what the documentation states: Header: #include <QUiLoader> CMake: find_package(Qt6 REQUIRED COMPONENTS UiTools) target_link_libraries(mytarget PRIVATE Qt6::UiTools) qmake: QT += uitools Don't know what this has to do with the topic though.

Thank you for pointing that out. I can accept a merger request in my project now.

@ChrisW67, that's brilliant. Thank you. I've found some useful corroberating information at https://superuser.com/a/1512700/904401.

Yes, it's possible, but references in .rep files typically don't persist during transfer. Use return values, state management, or callbacks to ensure the replica site gets the updated value.

@franco-amato Just checking you are aware of existing QMessageLogger Class.

Something along these lines might work (untested): class Uploader : public QObject { Q_OBJECT public: explicit Uploader(QObject *p = nullptr) : QObject(p) , m_nam(new QNetworkAccessManager(this)) { } void upload(const QUrl& target, const QString &file) { m_target = target; m_file = file; QNetworkReply *headReply = m_nam->head(QNetworkRequest(m_target)); connect(headReply, &QNetworkReply::finished, this, &Uploader::receiveHeadReply); // connect error signals etc... } public slots: void receiveHeadReply(QNetworkReply *reply) { qDebug() << Q_FUNC_INFO << reply->error() << reply->request().url() << reply->header(QNetworkRequest::ContentLengthHeader) << reply->header(QNetworkRequest::LastModifiedHeader); bool upload = false; if (reply->error() == QNetworkReply::NoError) { // file exists // prompt for overwrite // if yes then upload = true; } else if (reply->error() == QNetworkReply::ContentNotFoundError) { qDebug() << "Not there so we can upload"; upload = true; } else { // some other error condition we need to handle or ignore } reply->deleteLater(); if (upload) { // open m_file, read data, send data QByteArray data; QNetworkReply *putReply = m_nam->put(QNetworkRequest(m_target), data); connect(putReply, &QNetworkReply::finished, this, &Uploader::receivePutReply); } } void receivePutReply(QNetworkReply *reply) { qDebug() << Q_FUNC_INFO << reply->error() << reply->request().url(); reply->deleteLater(); } private: QNetworkAccessManager *m_nam; QUrl m_target; QString m_file; };

@jdent said in How can I extract the underlying value from QVariant?: Do I need to do a switch with types? is QVariant::metaType the way to find the kind of value inside the QVariant? Can you show an example? This would be one way to go. I have never had a need for this, but I'll give it a try how you could solve this with a switch statement: switch(myVariant.metaType().id()) { case QMetaType::fromType<int>().id(): // handle int break; case QMetaType::fromType<QString>().id(): // handle QString break; default: // maybe a message/log that this case is unhandled break; } (I have never used QMetaType this extensively. I hope that calling id() is the smartest choice to distinguish these cases.) std::variant also has a solution with the overload pattern (using lambdas) using std::visit. It might be possible to use the overload pattern with std::visit on QVariants as well.