System-UI QML Types

These are the functionally grouped lists of QML types as part of QtApplicationManager.

Singleton QML types need not be declared, they are referenced by just their type name.

Instantiable QML types are declared with the their name followed by curly braces. These declarations may be nested, creating parent-child relationships between the items.

Non-Instantiable QML types are return values provided to the System-UI code, that allow the user direct access to data that would otherwise only be available (partially) through the singletons' item models.

QML Singletons


A tool for startup performance analysis


Package installation/removal/update part of the application-manager


Central registry for interfaces for System-UI-to-app communication


Application model and controller


Notification model, which handles compliant notification requests


System monitoring model, giving access to a range of measurements, e.g. CPU load, frame rate, etc


Window model and controller

Instantiable QML Types

These types are only available for the System-UI:


Definition of an IPC interface between the ApplicationManager and applications


A proxy model for the ApplicationManager singleton


A type for monitoring process resource usage

The following types are generic and can be used within an application as well as within the System-UI. There is no need to use a single-process application when using these types.


Window root item required in a multi-process environment


Client side access to IPC interface extensions in the System-UI


An abstraction layer to enable QML applications to issue notifications to the System-UI

Non-Instantiable QML Types

All these types are return values provided through the ApplicationManager singleton - they are only available from within the System-UI.


Handle for an application known to the ApplicationManager


Handle for a container, that an application's Runtime is using


Handle for a runtime that is executing an Application

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