StartupInterface Class

An interface that allows to implement custom startup activities. More...

Header: #include <StartupInterface>

Public Functions

virtual void afterQmlEngineLoad(QQmlEngine *engine) = 0
virtual void afterRuntimeRegistration() = 0
virtual void afterWindowShow(QWindow *window) = 0
virtual void beforeQmlEngineLoad(QQmlEngine *engine) = 0
virtual void beforeWindowShow(QWindow *window) = 0
virtual void initialize(const QVariantMap &systemProperties) = 0

Detailed Description

This interface provides hooks that are called during the startup of application-manager processes. Hence, implementers of the interface can run their custom code at certain points during the startup phase.

A plugin has to implemet the pure virtual functions of the StartupInterface. The interface is the same for the System-UI (appman), as well as for QML applications (appman-launcher-qml). The plugins that should be loaded have to be specified in the (am-config.yaml) configuration file. The following snippet shows how the application-manager can be configured to load and execute the libappmanplugin.so in both the System-UI and applications and additionally the libextplugin.so in the System-UI only:

# System-UI
plugins:
  startup: [ "path/to/libappmanplugin.so", "path/to/libextplugin.so" ]

# Applications
runtimes:
  qml:
    startup: "path/to/libappmanplugin.so"

The functions are called in the following order:

Member Function Documentation

[pure virtual] void StartupInterface::afterQmlEngineLoad(QQmlEngine *engine)

This method is called, after the QML engine has been loaded.

[pure virtual] void StartupInterface::afterRuntimeRegistration()

This method is called, right after the runtime has been registered.

Note: It will only be called in the System-UI process.

[pure virtual] void StartupInterface::afterWindowShow(QWindow *window)

This method is called, right after the main window is shown. The window parameter holds a pointer to the just shown main window.

Note: This function will only be called, if the root object of your QML tree is a visible item (e.g. a Window or Item derived class). It will not be called, if it is a QtObject for instance.

[pure virtual] void StartupInterface::beforeQmlEngineLoad(QQmlEngine *engine)

This method is called, before the QML engine is loaded.

Note: All QtApplicationManager* QML namespaces are locked for new registrations via qmlProtectModule() after this call.

[pure virtual] void StartupInterface::beforeWindowShow(QWindow *window)

This method is called, after the main window has been instantiated, but before it is shown. The window parameter holds a pointer to the main window.

Note: The window is only valid, if the root object of your QML tree is a visible item (e.g. a Window or Item derived class). It will be a nullptr, if it is a QtObject for instance.

[pure virtual] void StartupInterface::initialize(const QVariantMap &systemProperties)

This method is called right after the systemProperties have been parsed.

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