General and Desktop

thank you very much, I moved "loader.setLoadHints(0);" before "loader.instance();", the problem was solved. the program such as below: int main(int argc, char *argv[]) { ...... QPluginLoader loader("ExtraFiltersPlugin.dll"); loader.setLoadHints(0); QObject *plugin = loader.instance(); if (plugin) { FilterInterface *fff = qobject_cast<FilterInterface *>(plugin); fff->test(); } MainWindow w; w.ploader = &loader; ...... } void MainWindow::on_unloadBtn_clicked() { ploader->unload(); }

If GPL is acceptable to you: https://github.com/KDAB/KDDockWidgets If you need LGPL: https://github.com/githubuser0xFFFF/Qt-Advanced-Docking-System LGPL but not ready out of the box: https://github.com/qt-creator/qt-creator/tree/master/src/libs/advanceddockingsystem (this is the one Qt Creator uses to display its dock widgets)

@RobbieP said in Still having trouble deserializing binary data from another UDP source (non-qt): the correct cast was (char *)&inPacket Yeah. Which should have gone through as reinterpret_cast<char *>(&inPacket) ? Not that it's much different, but keeps the wolves at bay. the writer is using fennecPacketStruct though isn't it? But not in the definition of PCSBSocketUDP::WriteData(void *inBuf, ...), or sendTo(..., (char*)inBuf), which are the equivalent of your udpSocket->read(&inPacket, ...).

It goes by a different name in the VS Tools. When you're not building with qmake there's no pro file and no CONFIG. You configure individual parameters of the tools used in the build process. For this particular option go to the project properties -> Qt Resource Compiler -> rcc and the option is called "Two-Pass Mode" here. Set it to Yes.

This is a "feature" of the default delegate. It's easily solved: just add this class class HighlightTextDelegate : public QStyledItemDelegate{ Q_OBJECT #if (QT_VERSION >= QT_VERSION_CHECK(5, 13, 0)) Q_DISABLE_COPY_MOVE(HighlightTextDelegate) #else Q_DISABLE_COPY(HighlightTextDelegate) #endif public: using QStyledItemDelegate::QStyledItemDelegate; protected: void initStyleOption(QStyleOptionViewItem *option, const QModelIndex &index) const override { QStyledItemDelegate::initStyleOption(option, index); const QVariant foregroundData = index.data(Qt::ForegroundRole); if (foregroundData.canConvert<QBrush>()) option->palette.setBrush(QPalette::HighlightedText, qvariant_cast<QBrush>(foregroundData)); } }; then call treeWidget->setItemDelegate(new HighlightTextDelegate(treeWidget));

@Sinarch said in Using MVC's insertRow() with custom subclassed QStandardItem: Currently I'm trying to implement a method for moving items in a tree up and down (without drag and drop, but by clicking specific buttons). [..] I'm doing it from scratch, and for that I need the insertRow() function. I don't get this. What you need is to either reimplement moveRows of the model or (easier to implement if performance is not a bottleneck) just call layoutAboutToBeChanged, do your reordering and then call layoutChanged

Really Thank you bro <3 you helped me a lot ... for me i was trying to get some examples from github i didn't look so much in openssl documentation a thank you the idea now is very clear because of your help i wish happy life for you bro <3 many thanks

@jack1998 said in srt file: my file is always between 0 and 60s it means that I have 00;00;60 the next instruction is 00;00;01 and not 00;01;00 There is no 60th second... Seconds go from 0 to 59. The 60th second is 1 minute (01:00) Just restart everything after you get to one minute so you start counting from 00:00,000 again

@Duc-Nguyen Is m_series a valid pointer? Why do you create chart as local variable? You know that it will be deleted as soon as plot_chart() finishes?

Hi, I would recommend a look at this excellent article from KDAB about using custom QStyle.

Ok, thanks.

https://doc.qt.io/qt-5/qtcore-index.html

@Chris-Kawa That would work for multiple QOpenGLWidgets in the same application. My use case involves sharing the context of one QOpenGLWidget with that of a QOffscreenSurface

@DungeonLords There is no point newing and deleteing a QDir *dir; class member. Just use QDir dir; for it. You can set the path in the declaration, or use void QDir::setPath(const QString &path) when you want to do so. Note that using QDir anywhere with a relative path as you do ("1.txt") is "likely to be wrong". That would look for it relative to the application's current working directory, and I doubt you know or intend that. Use absolute paths to find files. Use QStandardPaths Class for certain common directory paths. Not to mention: do you really have a directory named 1.txt?? There are a lot of examples where QDir dir("1.txt"); use in one method only. Depends whether you want to use the same QDir instance in multiple places in the class, and care that it should not be reconstrcuted.

@exStudent are the sizes of the images too big?

Thanks for your help.

@JonB Thanks