@Axel-Spoerl Thank you for your answer

@jsulm Okay, I'll try that. On Linux though, are the screen names typically the connectors? If so, they'd be unique enough for me, since this application is Linux only.

@SimonSchroeder Thank you! That is really good advice, I will try it out now :)

Hi and welcome to devnet, From a quick look, it is done through a serial port so QSerialPort would make sense for that part. However for the protocol part, you will have to check the Arduino documentation.

@JKSH Yes now It's working Thank you so much!

@alan02011114 I don't understand what your question is. As the error message tells you, your slot requires a dfreceived/second position argument and you are not supplying it in your lambda so you get the error.

Hi and welcome to devnet, QStackedWidget does not care nor handle what do the widgets inside it. What will not happen is UI updates but all the rest will. What you can do is disable these processing when the widgets are not visible if it makes sense.

@SGaist thanks much!!

Bonjour, es-tu sûr que le jpg a la bonne taille et qu'il peut être affiché dans le QPushButton ? Voici une petite méthode pour mettre une icône à la bonne taille. Salutations de Vienne, où il fait froid, dans le lockdown. Axel QImage tint(QString icon, QColor color, qreal strength, int w, int h) { QImage src = QIcon(icon).pixmap(QSize(w,h)).toImage(); if(src.isNull()) return QImage(); QGraphicsScene scene; QGraphicsPixmapItem item; item.setPixmap(QPixmap::fromImage(src)); QGraphicsColorizeEffect effect; effect.setColor(color); effect.setStrength(strength); item.setGraphicsEffect(&effect); scene.addItem(&item); QImage res = src; QPainter ptr(&res); scene.render(&ptr, QRectF(), src.rect() ); return res; }

If you use the the same model instance in more than one place they will always have the same index. This may, or may not be what you want. FYI

@activeLearner There are many ways to do it StackedWidgets It is simplest way to do the things that you have said. It may take memory but it is easiest method to solve this. How it works First Create buttons Add stacked widgets then you can create specific widgets such as human elephant in living beings. (You can promote widgets in ui too) Again you can add another stacked widgets inside that widget so it's most easy way to do so https://doc.qt.io/qt-5/qstackedwidget.html Simple dialogs || windows You can create windows on clicking the buttons and again inside it you can do same and achieve it. I don't recommend it as it looks so untidy 3.tabWidget It's similar to stacked widgets but it looks more like your browser tabs You can create tabWidget inside it and do same for more deep https://doc.qt.io/qt-5/qtwidgets-dialogs-tabdialog-example.html 4.Simple Widgets Another approach to get this is you can simply create widgets and use setVisible property to show on the basis of user clicks There is nothing that is best option. I like stackedWidget the most and can handle almost all things for simple development

In that case you could create a widget that comes on top your UI, make it transparent so you can see through it and then cut the holes you want when you need to follow the animation.

Thank you all guys. Your suggestions and expert opinion helped a lot with solving the problem. QT forum is always so helpful. After trying many things here is the conclusion and code is now working perfectly fine I removed the tic toc part time(&start); timer = double(getTickCount()); tic(); It was working but crashing then just to make sure that QImage is not NULL I removed the img = QImage(); // releasing memory with if(!img.isNull()) img = QImage(); Its working perfectly fine now.

@Robin_Khn Ok super. So its just qmake/moc that is a little slow sometimes. So when you add something to the UI from and go back to the code, you can press ctrl+shift+b (build file) it knows the new Widget right away.

@mrjj That worked, thank you very much.

@SGaist It's not enabled by default but it's available as a widget that you can place on the panel. Please tell me if I'm wrong here: Each application is given an area in the framebuffer to do its drawings and WM place additional window borders , shadows , effects and some handles to control windows. But I wonder how can WM separate toolbars from the window ? Are toolbars placed on some queue or special buffer which is visible to WM and DE(to use with the global menu widget)?

https://www.linkedin.com/in/sujan-d-6a980151/ This is my Linked In profile. Let me know if visa sponsor is available with you ? I am interested but I am Indian, if you sponsor me work visa, I will be able to move.