Interface DragSurface

All Superinterfaces:

Proxy

All Known Implementing Classes:

DragSurface.DragSurface$Impl

@Generated("org.javagi.JavaGI")
public interface DragSurface
extends Proxy

A surface that is used during DND.

Nested Class Summary

Nested Classes

Modifier and Type	Interface	Description
static interface	DragSurface.ComputeSizeCallback	Functional interface declaration of the ComputeSizeCallback callback.
static class	DragSurface.DragSurface$Impl	The DragSurface$Impl type represents a native instance of the DragSurface interface.
static class	DragSurface.DragSurfaceInterface	The GdkDragSurfaceInterface implementation is private to GDK.

Method Summary

Modifier and Type	Method	Description
default void	emitComputeSize(@Nullable DragSurfaceSize size)	Emits the "compute-size" signal.
static @Nullable Type	getType()	Get the GType of the DragSurface class.
default SignalConnection<DragSurface.ComputeSizeCallback>	onComputeSize(DragSurface.ComputeSizeCallback handler)	Emitted when the size for the surface needs to be computed, when it is present.
default boolean	present(int width, int height)	Present dragSurface.

Methods inherited from interface Proxy

handle

Method Details

getType

static @Nullable Type getType()

Get the GType of the DragSurface class.

Returns:

the GType

present

default boolean present(int width,
 int height)

Present dragSurface.

Parameters:

width - the unconstrained drag_surface width to layout

height - the unconstrained drag_surface height to layout

Returns:

false if it failed to be presented, otherwise true.

onComputeSize

default SignalConnection<DragSurface.ComputeSizeCallback> onComputeSize(DragSurface.ComputeSizeCallback handler)

Emitted when the size for the surface needs to be computed, when it is present.

This signal will normally be emitted during the native surface layout cycle when the surface size needs to be recomputed.

It is the responsibility of the drag surface user to handle this signal and compute the desired size of the surface, storing the computed size in the Gdk.DragSurfaceSize object that is passed to the signal handler, using DragSurfaceSize.setSize(int, int).

Failing to set a size so will result in an arbitrary size being used as a result.

Parameters:

handler - the signal handler

Returns:

a signal handler ID to keep track of the signal connection

Since:

4.12

See Also:

• DragSurface.ComputeSizeCallback.run(DragSurfaceSize)

emitComputeSize

default void emitComputeSize(@Nullable DragSurfaceSize size)

Emits the "compute-size" signal. See onComputeSize(DragSurface.ComputeSizeCallback).