Interface AppLaunchContext.LaunchStartedCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

AppLaunchContext

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public static interface AppLaunchContext.LaunchStartedCallback
extends FunctionPointer

Functional interface declaration of the LaunchStartedCallback callback.

See Also:

• run(AppInfo, Variant)

Method Summary

Modifier and Type	Method	Description
void	run(@Nullable AppInfo info, @Nullable Variant platformData)	The Gio.AppLaunchContext::launch-started signal is emitted when a AppInfo is about to be launched.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(MemorySegment, MemorySegment, MemorySegment) method.
default void	upcall(MemorySegment sourceAppLaunchContext, MemorySegment info, MemorySegment platformData)	The upcall method is called from native code.

Method Details

run

void run(@Nullable AppInfo info,
 @Nullable Variant platformData)

The Gio.AppLaunchContext::launch-started signal is emitted when a AppInfo is about to be launched. If non-null the platformData is an GVariant dictionary mapping strings to variants (ie a{sv}), which contains additional, platform-specific data about this launch. On UNIX, at least the startup-notification-id keys will be present.

The value of the startup-notification-id key (type s) is a startup notification ID corresponding to the format from the startup-notification specification. It allows tracking the progress of the launchee through startup.

It is guaranteed that this signal is followed by either a Gio.AppLaunchContext::launched or Gio.AppLaunchContext::launch-failed signal.

Because a launch operation may involve spawning multiple instances of the target application, you should expect this signal to be emitted multiple times, one for each spawned instance.

Since:

2.72

upcall

default void upcall(MemorySegment sourceAppLaunchContext,
 MemorySegment info,
 MemorySegment platformData)

The upcall method is called from native code. The parameters are marshaled and run(AppInfo, Variant) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

Creates a native function pointer to the upcall(MemorySegment, MemorySegment, MemorySegment) method.

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the arena in which the function pointer is allocated

Returns:

the native function pointer