Package org.gnome.gtk

Interface ListBoxUpdateHeaderFunc

All Superinterfaces:

FunctionPointer

Functional Interface:

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

@FunctionalInterface
@Generated("io.github.jwharm.JavaGI")
public interface ListBoxUpdateHeaderFunc
extends FunctionPointer

Functional interface declaration of the ListBoxUpdateHeaderFunc callback.

See Also:

• run(org.gnome.gtk.ListBoxRow, org.gnome.gtk.ListBoxRow)

Method Summary

Modifier and Type	Method	Description
void	run(ListBoxRow row, @Nullable ListBoxRow before)	Whenever row changes or which row is before row changes this is called, which lets you update the header on row.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) method.
default void	upcall(MemorySegment row, MemorySegment before, MemorySegment userData)	The upcall method is called from native code.

Method Details

run

void run(ListBoxRow row,
 @Nullable
 @Nullable ListBoxRow before)

Whenever row changes or which row is before row changes this is called, which lets you update the header on row.

You may remove or set a new one via ListBoxRow.setHeader(org.gnome.gtk.Widget) or just change the state of the current header widget.

upcall

default void upcall(MemorySegment row,
 MemorySegment before,
 MemorySegment userData)

The upcall method is called from native code. The parameters are marshaled and run(org.gnome.gtk.ListBoxRow, org.gnome.gtk.ListBoxRow) is executed.

toCallback

default MemorySegment toCallback(Arena arena)

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