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Hi, What exact instructions did you follow ? The ones from the documentation ?

You're welcome ! Since everything is clear now, please mark the thread as solved using the "Topic Tools" button so that other forum users may know a solution has been found :)

Hi, That's something you need to check with the Windows API directly. Qt doesn't handle the window decoration.

Solve it... added to the .pro file QT += datavisualization

Hmm, this still feels a bit weird, but at least solves the problem. One thing to add: in case of QListView or QTreeView, the event filter should be installed not on the widget itself, but on its viewport.

@J.Hilk QtCreator dark theme is selected and the preview does show different colors: [image: 7dce418b-9ef1-4939-b1a0-a7af1aa09ca4.png] Screenshot 2019-04-08 at 20.40.33 However in the C++ tab which shows some code, there's no highlighting there either: [image: df7d37e3-d0a8-4b92-93b9-a4e84a8306f4.png] Screenshot 2019-04-08 at 20.42.07

It'll be useful if you can post screenshot of non-resized (and hence not blurred) and resized/blurred version of the image. Also, note that scaling down images will almost always suffer from quality loss.

Possibly relevant, from openGL.org: "How you access overlay planes depends on the windowing system interface. While GLUT 3.7 has entry points defined for the use of overlays, currently the entry points are disabled. To use overlays, your application needs to use WGL, GLX, or another platform-specific interface." I happen to be using GLUT so whatever I was doing wrong, it was bound for failure anyway. Womp.

@maxwell31 said in Problem Compiling Widget application, Linux: QApplication::QApplication(int&, char**, int) This is a Qt4 ctor: https://doc.qt.io/archives/qt-4.8/qapplication.html#QApplication-3 Looks like you're picking up the Qt4 include files.

I don't tend to use the SCXML anymore. I just use the C++ framework and build my state machine in code. I tend to inherit QState with a BaseState class implementation that I can used to define base functionality with certain signals / slots and usually have access to a shared pointer which contains state machine data. From there I inherit the BaseState and apply the state specific logic. For prototyping state machine structure I tend to use the draw.io app which is a little less clunky than the SCXML editor.

@adaptine said in connect with extra argument on slot: @koahnig I'm not quite sure what you mean, but my additional parameter is not changing all the time. I'm simply looping a QHash once where the connect-method is called, using the QHash-key as the additional parameter such that the "nodeValueUpdate"-method knows which key-value pair in the QHash which is to be updated on "dataChangeOccurred"-signal. I referred to the official documentation which "allows" the default argument through routine declaration. Those default are argument are static and cannot change at all during runtime. The lambda implementation requires newer Qt libs prebuilds because of compiler features. Anyway it is good to see that you have a solution.

I found a solution. thank you very much for helping!

@kitfox Hi! You can add these commands to your .pro file: MOC_DIR = ./src/moc OBJECTS_DIR = ./src/objects RCC_DIR = ./src/resource It will clean up your application build directory and store all the moc, objects, resources files in the src directory.

@PsionicAlch Take a look at https://doc.qt.io/qt-5/qmake-variable-reference.html#installs You should also consider using Qt resource files https://doc.qt.io/qt-5/resources.html

@kitfox You can use QTextStream, but you have to open the file first: QFile file(":/mainmenu.xml"); if (data.open(QFile::ReadOnly)) { QTextStream in(&file); QString xmlStrn = in.readAll(); file.close(); }

@Kacank87 I don't have any examples for that device (is there any documentation/examples/SDK from device manufacturer?), but in general you can use https://doc.qt.io/qt-5/qserialport.html in Qt to access serial port. What exactly to send/receive depends on your device.

Rather than using a bunch of ifs, what about using a QMap or a QHash to store the information and retrieve that in the slot ? This will make your implementation easier to maintain.