Package org.gnome.gtk

Interface SpinButton.InputCallback

All Superinterfaces:

FunctionPointer

Enclosing class:

SpinButton

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 SpinButton.InputCallback
extends FunctionPointer

Functional interface declaration of the InputCallback callback.

See Also:

• run(io.github.jwharm.javagi.base.Out<java.lang.Double>)

Method Summary

Modifier and Type	Method	Description
int	run(Out<Double> newValue)	Emitted to convert the users input into a double value.
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 sourceSpinButton, MemorySegment newValue)	The upcall method is called from native code.

Method Details

run

int run(Out<Double> newValue)

Emitted to convert the users input into a double value.

The signal handler is expected to use Editable.getText() to retrieve the text of the spinbutton and set newValue to the new value.

The default conversion uses g_strtod().

upcall

default int upcall(MemorySegment sourceSpinButton,
 MemorySegment newValue)

The upcall method is called from native code. The parameters are marshaled and run(io.github.jwharm.javagi.base.Out<java.lang.Double>) 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 function pointer will be allocated in this arena

Returns:

the native function pointer