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QTimers

The class QTimer is your tool if you want something to happen, say every 100 ms. But in that case, is it exactly every 100 ms, or could the next one go off say 96ms later? By default, it actually could. Are you guaranteed that it will go off every 100ms? The answer depends on what you are otherwise doing on your gui thread. Better watch this episode to understand these issues in details. 0:00 Intro 0:54 The timer code 3:04 Understanding the error - the timeout happens early 4:28 Different timer types 7:04 Fixing the clock 7:44 Timers are triggered by the event loop 8:26 Example of a timer that doesn't fire while the app if busy 12:00 Debugging into Qt to understand coarse timers Links: Building Qt yourself:    • Building Qt   All QML tips and tricks videos :    • QML Tips and Tricks   All Qt Widgets and more videos:    • Qt Widgets and more   About the host: The video is presented by Jesper Pedersen, who started with Qt back when Qt was widgets only and the version was 1.44, which gives him 21 years of experience with Qt. Since 2000 he has taught almost 100 Qt classes, ranging from Qt Widgets to QML. Heck, Jesper even taught a few classes on QTopia Core — Trolltech's initial attempt at creating a phone stack. Today Jesper holds a fancy business title, but that doesn't prevent him from coding both in his job and in his spare time. Every month our newsletter is featuring technical blogs on Qt, C++ and 3D topics: https://www.kdab.com/development-reso... About KDAB: KDAB offers experienced software experts to help you deliver functional, high-performing and innovative software across embedded, mobile and desktop platforms for projects using C++, Qt, QML/Qt Quick, OpenGL, Qt 3D and more. https://www.kdab.com/software-services KDAB experts regularly take time out to deliver KDAB’s world class training, in-house or at open enrolment courses around the world. We are the market leaders for training in Qt, OpenGL and C++. Contact us to find out more at training@kdab.com or visit our website: https://www.kdab.com/software-service... We are over 100 people, located all around the world. Our Head Office is in Sweden and we have other offices in Germany, France, the UK and the USA. https://www.kdab.com/about/contact/