Gdk::DragSurface Class Reference

Interface for drag surface surfaces. More...

#include <gdkmm/dragsurface.h>

Inheritance diagram for Gdk::DragSurface:

Public Member Functions
	DragSurface (DragSurface && src) noexcept
DragSurface &	operator= (DragSurface && src) noexcept
	~DragSurface () noexcept override
GdkDragSurface *	gobj ()
	Provides access to the underlying C GObject. More...
const GdkDragSurface *	gobj () const
	Provides access to the underlying C GObject. More...
bool	present (int width, int height)
	Present drag_surface. More...
Glib::SignalProxy< void(DragSurfaceSize &)>	signal_compute_size ()

Static Public Member Functions
static void	add_interface (GType gtype_implementer)
static GType	get_type ()
	Get the GType for this class, for use with the underlying GObject type system. More...

Protected Member Functions
	DragSurface ()
	You should derive from this class to use it. More...

Related Functions
(Note that these are not member functions.)
Glib::RefPtr< Gdk::DragSurface >	wrap (GdkDragSurface * object, bool take_copy=false)
	A Glib::wrap() method for this object. More...

Detailed Description

Interface for drag surface surfaces.

A Gdk::DragSurface is a surface that is used during a DnD operation.

Since gtkmm 3.98:

Constructor & Destructor Documentation

DragSurface() [1/2]

Gdk::DragSurface::DragSurface ( )

protected

You should derive from this class to use it.

DragSurface() [2/2]

Gdk::DragSurface::DragSurface ( DragSurface &&  src )

noexcept

~DragSurface()

Gdk::DragSurface::~DragSurface ( )

overridenoexcept

Member Function Documentation

add_interface()

static void Gdk::DragSurface::add_interface ( GType  gtype_implementer )

static

get_type()

static GType Gdk::DragSurface::get_type ( )

static

Get the GType for this class, for use with the underlying GObject type system.

gobj() [1/2]

GdkDragSurface * Gdk::DragSurface::gobj ( )

inline

Provides access to the underlying C GObject.

gobj() [2/2]

const GdkDragSurface * Gdk::DragSurface::gobj ( ) const

inline

Provides access to the underlying C GObject.

operator=()

DragSurface & Gdk::DragSurface::operator= ( DragSurface &&  src )

noexcept

present()

bool Gdk::DragSurface::present	(	int	width,
		int	height
	)

Present drag_surface.

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.

signal_compute_size()

Glib::SignalProxy< void(DragSurfaceSize &)> Gdk::DragSurface::signal_compute_size

(

)

Slot Prototype:

void on_my_compute_size(DragSurfaceSize& size)

Flags: Run Last

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 Gdk::DragSurfaceSize::set_size().

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

Since gtkmm 4.12:

Parameters

size	The size of the drag surface.

Friends And Related Function Documentation

wrap()

Glib::RefPtr< Gdk::DragSurface > wrap ( GdkDragSurface *  object, bool  take_copy = false  )

related

A Glib::wrap() method for this object.

Parameters

object	The C instance.
take_copy	False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns

A C++ instance that wraps this C instance.