Full screen HMI

The reference image includes a second HMI that demonstrates how to run a single, monolithic HMI without packaging apps into Blackberry ARchive (BAR) files.

The default HMI delivered with QNX Apps and Media reference images uses Application and Window Management components, such as the Authorization Manager (authman) and Application Launcher (launcher), and apps packed into BAR files. If you don't want to use this HMI model, you can configure your system to use a second HMI, also written in Qt.

To configure your system to display this simple HMI instead of the default Home screen:

On your target, select Settings to get the IP address for your target platform.
On your host system, use SSH to connect to the target (username: root, password: root).
Use elvis or vi to change the relevant line in /var/etc/services-enabled to disable the QT home screen. Change:
```
QTHOMESCREEN:true
```
to
```
QTHOMESCREEN:false
```
Save the services-enabled file.
Restart your board.

After the board restarts, the simple HMI showing the QNX logo and the target's IP address appears:

Figure 1. A simple HMI that consists of a white background, the QNX logo, and the target's IP address.

To make this change persistent during image rebuilds, modify the services-enabled file in your deployment workspace: $QNX_DEPLOYMENT_WORKSPACE/target/product/AnM/boards/board-specific/var/etc

You can use the same method to enable and disable other services:

# service:true | false

For example:

WIFI:false
QTHOMESCREEN:false
USBCAM:true

Note: It's expected that developers write their own full screen HMI, as the sample provided is intended just to demonstrate how to start Qt runtime and its dependencies (e.g., graphics/Screen, multimedia/mm-renderer). For more information, see "Writing an HMI" and "Source code for sample Qt apps" in the QT Developer's Guide.