QML provides a brand new approach to developing GUI applications for a range of different devices. This makes it really easy to write C++ apps for multiple operating systems. We can develop the same QML and QtQuick application for both desktop and mobile.
By assigning the file type to a specific file we can determine what kind of information and data we expect to find inside that particular file. There are a lot of applications that handle multiple file types, so we want to use specific one that can be reserved only for the given application. By double clicking on the file the default app will be launched and the file loaded into it.
Qt Quick is a part of the SDK from Qt. It consists primarily of the following:
By creating a Qt Quick application we are connecting all of these three parts into one. The most common use case for this type of application is to create a GUI with QML and Javascript to handle the user interface and user interactions and C++ as the back end to handle complicated calculations and time-consuming processes.