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• Qt Development

  Everything development. From desktop and mobile to cloud. Games, tools, 3rd party libraries. Everything.

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  Qt for MCUs
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  The drop in refresh rate isn't the big concern, but it is a helpful indicator that something is getting "gummed up". The big concern is the hang on re-activating the app. After launching and backgrounding the application, wait for 10-15 minutes. I notice that the refresh rate slowly drops over this time. Then bring the application back to the foreground. You will get a beachball hang for several seconds. The length of the hang seems correlated to the amount of time in the app was in the background (not active). I completely understand and agree with the reasonable limit on GUI update rate. The longer answer above mentions that there is hardware in the loop for this application. As such, the fastest average update rate to the GUI is about 20Hz (1/50ms). Most systems are closer to 10-15Hz average update rate to the GUI. The hang that occurs after the app is backgrounded/foregrounded does not seem to be impacted by this update rate; it only seems to depend on the amount of time the app is inactive. Another thing to note is that I've purposely stripped down this application to aide in debugging this hang. While the update rate to the GUI shouldn't need to be faster than 10-15Hz, one use case for this app is as a simple data logger. As such, some users want to log data "as fast as possible". To do this, the signals coming from StemWorker::pollStemForChanges() are also connected to some plots via qCustomPlot objects. I originally suspected qCustomPlot the source of the hang, which is how I started to move towards the stripped down version of the app posted here. You can run the full version (even without the associated hardware) which is available in compiled binaries here with source here. (and thanks for your input on this so far)
• Education and Certification

  Qt in Education, Qt Certification

  Qt in Education

  Qt Certification
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  1920
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  Since I have not received the certificates with the contact formular people I found out the right contact for certificate is this email address: certification (at) qt.io From there I got the information that there is currently a bug in the Persona VUE System. When you finish an exam it states you get the certificate in 4 to 6 weeks but actually you never receive it because: Persona VUE does not notify automatically to Digia According to Digia they were thinking no one took the exam currently because of COVID so they were not aware that the notification system between Persona / Digia was broken. I had to send my passed exam dates so they manually start printing the certificates. Some days ago I received my certificates but printed with the name wrong. If you have special letters in you're name like in my case the german "ß" be aware that they maybe get printed wrong. So now I wait again for the certificates... But I have to say response from certification (at) qt.io is fast. I wish they would have stated this contact address somewhere more obvious....
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  Brainstorm
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  Honestly, the contract rate is exactly double of flu. These are numbers from a university in CA. The survival rate is 99.99% for most people, while 99.9% for vulnerable groups (not great). There is also some substances that have shown to take care of it quickly. So now that we know a lot more now it is less of a worry. Besides, flu killed more ppl in the USA during the woodstock year flu pandemic (1969?) (like 1 million if my numbers are right) than ppl have died in USA this year of covid. This is basically a bad flu that has been politicized and overreacted to. If we do stupid things like shut down that will kill more people. I read that 300 Million people will starve by years end due to shutting down countries. Twice as many people have died in the USA from suicide and drug overdose due to lockdowns than covid (according to CDC). So the reaction is deadly. If this didn't have massive political element to this I might believe the hype, but there is so much garbage in the media on this. It is all about fear fear fear. Scare the people into submission. I do social distancing and masks mostly to put other people at ease. I know people in the hospital that are extremely ill from this and have had family members get it. So its a real thing, but the reaction is non nonsensical. I know I have been exposed and likely have antibodies. I had a family member be sick with this for 2 months. Anyway, what I am saying is "don't worry, be happy". I just thank my maker that I am alive and can continue to enjoy life. So, if this is against the rules to post this I will delete it. This is what I know and feel about this. Wash your hands. I think that is your best weapon.
• Special Interest Groups

  Forums connected to various groups live here

  QtonPi

  Qt Contribution

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  Qt on BlackBerry and QNX

  C++ Gurus

  Independent Developers

  OpenReq Issue Link Map Tool
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  9663
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  Hi, Looks like you guys have material for a new bug report.
• International

  Language specific discussions from Albanian to Turkiye

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  Normalerweise sage ich ja.@jsulm Self. Connect(self. Button, SIGNAL( "clicked()") , set value) Def setvalue() ; Self. QlineEdit. SetText("test") Jetzt habe ich aber keine QlineEdit sondern diese Adresse bzw. Hexa Code.
• Behind the Scenes

  This is where all the posts related to the Qt web services go. Including severe sillyness.

  Qt.io webservices

  Wiki Discussion
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  9800
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  @AndyS I did another edit yesterday, but now they are both included. Also the older one. Thanks.