Package org.gnome.gtk

Interface FontButton.FontSetCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

FontButton

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 FontButton.FontSetCallback
extends FunctionPointer

Functional interface declaration of the FontSetCallback callback.

See Also:

• run()

Method Summary

Modifier and Type	Method	Description
void	run()	Emitted when the user selects a font.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment) method.
default void	upcall(MemorySegment sourceFontButton)	The upcall method is called from native code.

Method Details

run

void run()

Emitted when the user selects a font.

When handling this signal, use FontChooser.getFont() to find out which font was just selected.

Note that this signal is only emitted when the user changes the font. If you need to react to programmatic font changes as well, use the notify::font signal.

upcall

default void upcall(MemorySegment sourceFontButton)

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

toCallback

default MemorySegment toCallback(Arena arena)

Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment) method.

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the function pointer will be allocated in this arena

Returns:

the native function pointer