Package org.gnome.gtk

Interface GLArea.RenderCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

GLArea

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 GLArea.RenderCallback
extends FunctionPointer

Functional interface declaration of the RenderCallback callback.

See Also:

• run(org.gnome.gdk.GLContext)

Method Summary

Modifier and Type	Method	Description
boolean	run(@Nullable GLContext context)	Emitted every time the contents of the GtkGLArea should be redrawn.
default MemorySegment	toCallback(Arena arena)	Creates a native function pointer to the upcall(java.lang.foreign.MemorySegment, java.lang.foreign.MemorySegment) method.
default int	upcall(MemorySegment sourceGLArea, MemorySegment context)	The upcall method is called from native code.

Method Details

run

boolean run(@Nullable GLContext context)

Emitted every time the contents of the GtkGLArea should be redrawn.

The context is bound to the area prior to emitting this function, and the buffers are painted to the window once the emission terminates.

upcall

default int upcall(MemorySegment sourceGLArea,
 MemorySegment context)

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

toCallback

default MemorySegment toCallback(Arena arena)

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

Specified by:

toCallback in interface FunctionPointer

Parameters:

arena - the arena in which the function pointer is allocated

Returns:

the native function pointer