General and Desktop

Did you already saw the Scalability part ? QPainter uses the devicePixelRatio of the target.

@SGaist, excellent. Needed that changeEvent to change color on enabled/disabled and for hit test rect().contains(releaseEvent->pos()) looks like working perfectly.

Then make a texture out of it and render it as part of your scene with the rest of your assets.

@PhabSeals said in Passing QWheelEvents to child causes infinite loop: I also can't send the wheelEvent directly to the child object because there is no way of accessing it in the QApplication event filter because the QApplication does not know if widgetInFocus is a MyWidget object or not. Presuming that MyWidget is registered with the metaobject system, ie uses Q_OBJECT, either of the following will resolve this question: !strcmp(widgetInFocus->staticMetaObject().className(), "MyWidget"); qobject_cast<MyWidget *>(widgetInFocus) != nullptr;

@Emon-Haque, took a while to figure out that setMaximumSize(QSize(14, 14)) is what I need in the constructor!

Appreciate the help, I'll take all your suggestions and learn from them. Thank you!

The rules on Windows to avoid DLL hell are pretty simple: Deploy the dlls your application requires in the same folder as your executable (plugins like Qt's own can live in different folders though). Do NOT install any dll in system folders. This can have unexpected side effects and wreak havoc. Unless really required (most of the time it's not), do not modify the PATH environment variable.

That was it, thank you!

Use QProcess and read stdout/stderr.

Qt 5.11.3 I receive data from different devices and problem is everywhere.

From https://doc.qt.io/qt-5/qregularexpression.html For an overview of the regular expression syntax supported by QRegularExpression, please refer to the [...] pcrepattern man page And from that page: The long synonyms for property names that Perl supports (such as \p{Letter}) are not supported by PCRE, nor is it permitted to prefix any of these properties with "Is". Basically: Qt uses pcre in QRegularExpression and that library doesn't support those blocks

Qt does that because you asked it to do contradictory things and it has to choose one. If you do not want the window maximized then do not call showMaximized() and hide the maximize widget (https://doc.qt.io/qt-5/qwidget.html#windowFlags-prop) to make it difficult for the user to do it.

Your answers help me a lot, I will try this based on your example, thanks !

@SGaist I have tried to ask/suggest that to the OP several times now....

@eyllanesc, hmm not bad: [image: c36e825c-6b45-47e3-b86d-e9c3c69c5461.gif] would be nicer if there's some easy way to add a QPropertyAnimation for color. Instead of svg file there should be some way to use path data, to avoid DOM traversing, directly and animate its color.

@eyllanesc, posted as another question.

Oh, right. Thanks, I just tried it and it works exactly. Just put it in an if-statement to check if it's at the end of the array so I can see if I need a comma or not.