You need to install the webkitwidgets library. On Ubuntu, try this in a terminal: sudo apt-get install libqt5webkit5-dev On Fedora, the package has a different name, thus try: sudo apt-get install qt5-qtwebkit-devel Or on Fedora, via dnf: sudo dnf install qt5-qtwebkit-devel
Ref: http://doc.qt.io/qt-5/qscreen.html#grabWindow You say you require a screenshot of a window, therefore screenshot = screen.grabWindow(0, 0, 0, 100, 100) is not the appropriate call here, since it captures the entire screen, cropped according to the final 4 parameters. (the 100 parameters are width and height). screenshot = screen.grabWindow( widget.winId() ) captures the widget window. However, … Read more
We should check our driver first $ cd /opt/Qt5.2.1/5.2.1/gcc_64/plugins/sqldrivers then we can find some files Use the command below to check library $ ldd libqsqlmysql.so if you find the problem libmysqlclient_r.so.16 => not found it may be the library-dependency problem. After I did a little research on the Internet, there is a way would be … Read more
To detect a hung event loop, you need to wrap the operation that can hang the event loop, to detect when it takes too long. The “operation” is the QCoreApplication::notify member. It is called to deliver events to all event loops, in all threads. An event loop hang occurs when the code that processes an … Read more
Example: Read json from file /* test.json */ { “appDesc”: { “description”: “SomeDescription”, “message”: “SomeMessage” }, “appName”: { “description”: “Home”, “message”: “Welcome”, “imp”:[“awesome”,”best”,”good”] } } void readJson() { QString val; QFile file; file.setFileName(“test.json”); file.open(QIODevice::ReadOnly | QIODevice::Text); val = file.readAll(); file.close(); qWarning() << val; QJsonDocument d = QJsonDocument::fromJson(val.toUtf8()); QJsonObject sett2 = d.object(); QJsonValue value = sett2.value(QString(“appName”)); … Read more
It is possible, but it is not portable. The QBackingStore is just a wrapper class around a QImage buffer on most platforms, but I suppose this is not guaranteed. I’ve researched this issue when writing the QuickWidget. A cast is needed: QImage * image = dynamic_cast<QImage*>(backingStore()->paintDevice()); if (image != 0) // it’s an image, do … Read more
Qt style sheets support sub-controls and pseudo states, you can use it to improve your customization. see Qt6 docs In this case you can use the ::item sub-control and the :focus pseudo state (the “current” pseudo state doesn’t exist, but the :focus does the same). This is an example that you can use: QTableView::item:focus { … Read more
Option 1: Promoted I suppose you mean inserting a QChartView, because QChartView inherits from QGraphicsView, this would be a good option, for this we do the following: first add QT += charts in the .pro place the QGraphicsView to the design. Right click on the QGraphicsView and select Promote to… When doing the above, a … Read more
After looking through a repository that was being updated to Qt5 as well; I found they used a line like this. filename, _filter = QtWidgets.QFileDialog.getOpenFileName(None, “Open ” + key + ” Data File”, ‘.’, “(*.csv)”) filename is a string and the (*.csv) gets discarded in the _filter variable
In Qt5 winEvent was replaced by nativeEvent: bool winEvent(MSG* pMsg, long* result) is now bool nativeEvent(const QByteArray & eventType, void * message, long *result) And in EcWin7::winEvent you have to cast void to MSG: bool EcWin7::winEvent(void * message, long * result) { MSG* msg = reinterpret_cast<MSG*>(message); if (msg->message == mTaskbarMessageId) { … I was able … Read more