General and Desktop

Hi, Keep the QPixmap rather than execute the conversion each time.

Use a stable solver. Your matrix is quite close to singular. QR comes to mind, eigen already provides it out of the box.

This code looks strange ... class positionsForm *form = new class positionsForm(model, this); The class name doesn't start with a capital letter and looking like a function, confusing. Why are you using class , obviously positionsForm is a class. and finally: connect(ui->positionsTable->model(), SIGNAL(dataChanged(QModelIndex,QModelIndex)), this, SLOT(emitSignal())); since model is defined in ArticlesWindow why not make the connection straight away in that class ?

@hskoglund said in Qt5 default text encoding has chaged: Utils.h:173: error: C2440: 'return': cannot convert from 'const char8_t [4]' to 'QString' Because of QT_NO_CAST_FROM_ASCII which should be enabled for all projects by default - a QString and a char* are two completely different types which should not implicitly convert into each other.

I'm using GCC 64 bit I found a bug report about this, so I think it's a known error (to compensate for an MSVC issues). I am ignoring it and all seems to work (though I don't like such scary messages suggesting I'm going to free memory incorrectly)

Thanks - I was following some internal documentation which is probably not the best idea. Your answer makes sense.

It was a great help for running threads. Running in QtConcurrent::run([=], really solved all the issues of my UI non responsive ness.. Thanks a lot for your help

@markolino_it Then please mark the topic as solved.

@overfl0w said in qt.qpa.xcb: could not connect to display: which is still ROOT privilege uid/gid of 0), it fails about the 3rd of 4th plugin loading (XCB) Usually, root cannot access X server when running from other user account. Do you really have to start your app as root? Regarding plug-ins: set QT_DEBUG_PLUGINS=1 in a terminal and start your app there: there should be much more output providing more details why exactly the plug-in isn't loaded, please post it.

Hi, If memory serves well, you should do that to the widget inside the QDockWidget.

@SGaist , I think the actual problem was low resources ( disk space ), I've cleaned up and removed a lot of junk, now installing again.

Ok it works! In the constructor: positionsForm::positionsForm(QSqlRelationalTableModel *parentmodel, QWidget *parent) : QDialog(parent), ui(new Ui::positionsForm) this->parentmodel = parentmodel; connect(ui->positionsTable->model(), SIGNAL(dataChanged(QModelIndex,QModelIndex)), this, SLOT(updateParent())); And the function: void positionsForm::updateParent(){ qDebug() << "updateParent called!!"; this->parentmodel->select(); }

Looks likes there might be a bug that has crept in. I have a related but different issue with the macOS style.

Are you sure that it is not just related to the fact that you are at the far left of the tab list ? The same happens with macOS. The left button is transparent but as soon as you start moving the tabs with the right arrow, the left one fully appears and becomes usable. It becomes again transparent when full left is reached again.

Did you saw this updated version of the example code you likely used for your application: https://appfluence.com/productivity/how-to-authenticate-qt-google-sso/ ?