The Qt5 HMI is based on version 5.2 of the Qt framework and uses the QPPS library to access PPS and talks directly to Screen through its C API.
The application and window management display area of the Qt5 HMI includes seven tabs. Each tab is associated to a different view of the same process. The core view is the display area with the status bar and taskbar.
Here are the tabs on the application and window management display area:
- Push-to-Talk—activates Automatic Speech Recognition (ASR)
- Home—shows a consolidated view of several key apps
- Navigation—allows the user to interact with the currently active navigation engine
- Media Player—allows the user to play videos or music, or to listen to the radio
- Car Control—provides access to vehicle settings for audio, climate control, etc.
- Communications—provides access to email, text messages, contacts, and a telephone dial pad
- Apps Section—shows the complete set of available apps
Figure 1. Home screen (Core view) with application and window management taskbarPrerequisite knowledge
To understand the Qt5 application and window management, you must be proficient with C++ and understand the design and concept of the Qt framework, which provides a toolset for writing UI-based native applications on embedded platforms. For more information about Qt, see the Qt Company website.
If you want to customize the Qt5 application and window management, or write a replacement using the same technologies, you must know how to use the Qt development tools, particularly Qt Creator.