Package org.gnome.gtk

Interface ColorButton.ColorSetCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

ColorButton

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 ColorButton.ColorSetCallback
extends FunctionPointer

Functional interface declaration of the ColorSetCallback callback.

See Also:

• run()

Method Summary

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

Method Details

run

void run()

Emitted when the user selects a color.

When handling this signal, use ColorChooser.getRgba(org.gnome.gdk.RGBA) to find out which color was just selected.

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

upcall

default void upcall(MemorySegment sourceColorButton)

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