Pretty cool! This is the heart of all our qt applications. Visual Studio should now be showing the new multi-platform Qt Quick project. Press 'Finish' to complete the project creation wizard. Add project configurations for both the Windows and the Raspberry Pi versions of Qt. I was curious, so I also looked up how the QEventLoop works. The Qt Quick Application Wizard dialog will open press 'Next >' for configurations setup. You can see that the central event loop is constructed and executed here. After some more searching, I found this here. This in turn calls QCoreApplication.exec. After some searching, I was able to find here. ![]() It’s not too interesting, since it calls the method in QGuiApplication. Here is the implementation of the QApplication.exec method. an easy way to play m3u8 stream links or test a single hls streaming example. Thus, I eventually found it in the kernel subdirectory here. The windows batch scripts that generate m3u8 playlists from. ![]() However, I didn’t see qapplication.h in there. Within this repository, after some poking around, you’ll find the Qt Widgets code here.įirst, I looked in the widgets subdirectory. The qt source code for several qt modules, including Qt Widgets is found in the qtbase repository. The following answer sketches out one example of the path taken to finding the source code.įirst, if you look at the documentation page for QApplication, you’ll notice that it’s in the Qt Widgets module. What is the difference between the Qt GUI module and the Qt Widgets module? What is the difference between the QGuiApplication and QApplication classes? These justifications will help us improve the lesson for future employees. If any exercises seem irrelevant, you can skip them and instead write a justification as to why they are unimportant. To learn as much as possible from these exercises, write your responses before revealing the provided answers. These articles are worth skimming quickly so that you’re aware that they exist when you need them: Read the “Detailed Description” section of the QWidget class.Read the “Detailed Description” section of the QGuiApplication class.Read the “Detailed Description” section of the QThread class.These articles provide conceptual basis for working with Qt, either in C++ or using PyQt: Be sure you’re looking at the appropriate documentation for the version of Qt you are using. Thus, a lot of online documentation and examples still link to Qt5. Note that, as of writing this module in early 2021, Qt6 is relatively new compared to Qt5. The qt modules have different licenses and operating system support, thus it’s important to be aware of what modules you’re using. For example, the Qt Core, Qt GUI, Qt Widgets, and Qt Quick are all different modules. This article assumes some familiarity with C++. ![]() You can do some very sexy things, and all the basics are covered too.When developing cross-platform, native desktop applications, we typically use the Qt platform. Once you've got the hang of QML-C++ interactions, and know how to make your own plugins, the development flow is excellent you can quickly develop complex views, easily add animations and effects, the coupling between data views list tables and lists and their C++ models is very good, and everything you throw into a GUI is easily customisable. Doing fancy stuff like custom window frames is an adventure.Īll of this said, I think the benefits are still well worth dealing with the tiresome aspects. If you want to do quick prototyping using qmlscene, you have to package your custom components in an extension plugin. The learning curve on QML-C++ interactions is a slippery one. Deployment is still under-documented and full of hidden gotchas there is a lack of non-trivial real-world use case examples. *With caveats, of course - it still lacks the distributed knowledge and support systems offered by a truly mature library. ![]() The short answer to your question I'd give is: yes, it most definitely is.* We're nearing the end of a development process in which we've ported one of our applications from Widgets to Qt Quick the application is graphically fairly simple (using just standard control types) but complex in terms of the user interactions and views it contains.
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