Thank you very much for the tip, this looks good and is effectively the best option I know until now.

@suslucoder ok im not sure what s does. Anyway, could you try (in on_Serial_Read) memset(dizi, 0, 14); memcpy(dizi, data.constData(), data.size()); in place ot the line memcpy(dizi, data.constData(), 14); and tell if it still stops at 15 ?

@rohit1729 You should read this first: https://doc.qt.io/qt-5/signalsandslots.html void panelB::mouseMoveEvent(QMouseEvent *eventMove) { QString txt; txt = QString("(X:%1,Y:%2)").arg(eventMove->pos().x()).arg(eventMove->pos().y()); emit coordinatesChanged(eventMove->pos().x(), eventMove->pos().y()); //qDebug() << txt; } coordinatesChanged would be the signal.

@Guigiidre and in the end the item/app draws the same pixels. On the one screen it will just appear smaller then on the other. No other impact on the appearance of the item. I am still not sure what you expect to be different with such requested mode.

@raven-worx Yes, this is exactly what I was looking for. I didn't realize there was an example on it, silly mistake on my part. Thank you very much!

Glad to see you have you're problem fixed.

I solved my problem with not calling parseFunction in its own class constructor but with signals and slots in mainwindow.cpp file: connect(xml, SIGNAL(started()), first, SLOT(parseFunction()));

@alogim said: Yes, that seems to be a good explanation but... why, if I put the same loop (without usleep() in the dialog class and call processEvents() after each item addition (without using threads at all), does the qGraphicsView smoothly update? Use QElapsedTimer to find out: How long does it take to emit the signal 10000 times without processEvents()? How long does it take to emit the signal 10000 times with processEvents()?

@mrjj Thanks, I've updated the syntax now. I've corrected the code now and everything seems to be working. I'm now creating one instance of the guihandler class and referencing the one instance now. @theshadowx I only want to have one instance of saloon at a time, however I do have other ui classes that use the same database. I hasn't thought about updating all classes simultaneously, think it'll come in handy. Thanks for your advice. Thank you all for your responses. Consider this one solved.

solved with QSplitter he overlaps widgets if widget have fixed size just need to set minimum and maximum size of widget i have bad read holy qtdoсs

Hi I have additional question. Maybe I should open a new topic, but it's kind of related. So, I am making this GUI with the sub-pages. The thing is, the same GUI will be used for different customers. Some will have certain pages disabled and also logic of a single page might be slightly different. Some customers may have exactly the same GUI. The question is, should I inherit from a basic page for each customer and override certain functions, or should I have a single page and use a variable "Customer" and make certain exceptions with the if structures. Additional thing bugging me is that some of the pages will look very similar and have a similar functionality. There might be some additional elements or some less. Again, should I use inheritance or a variable with the if structure? I don't want to overuse the inheritance, but I imagine the if-structures can get messy, especially as the number of customers grows. So, my idea was to do the following: basicPage similarPage similarPageCustomer1 similarPageCustomer2and3 anotherSimilarPage anotherSimilarPageCustomer1 anotherSimilarPageCustomer2and3 thirdSimilarPage thirdSimilarPageCustomer1 thirdSimilarPageCustomer2and3 But that seems like a lot of inheritance and new classes for each customer, considering that for some of them only minor things might be different, or nothing at all. Thanks for the advice.

I am part of a team and we specialise in cross-platform solutions and growing and proven ourselves with more than 150 apps so far on desktop,mobile or embedded. We have completed more than 120 Qt based projects world wide. C, C++, Python, JS is what we use with Qt everyday. Samples: http://milosolutions.com Testimonials: http://milosolutions.com/testimonials/ Skype: zanetaww WWW: http://milosolutions.com Thanks, Zaneta at MILO

Then what does your custom widget contain ?

I made a mistake in the qt5/qtbase/mkspecs/android-g++: at line QMAKE_LIBS_PRIVATE I should have removed -lm

@sierdzio Sorry my bad, i mean i want to programmatically generate Android UI prototype

If you want to do it widget style you might be interested by this Otherwise, are you going to use QML ?