Struct gdk4::DragSurface

#[repr(transparent)]
pub struct DragSurface { /* private fields */ }

A DragSurface is an interface for surfaces used during DND.

Signals

compute-size

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 DragSurfaceSize object that is passed to the signal handler, using DragSurfaceSize::set_size().

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

Surface

enter-monitor

Emitted when @surface starts being present on the monitor.

event

Emitted when GDK receives an input event for @surface.

layout

Emitted when the size of @surface is changed, or when relayout should be performed.

Surface size is reported in ”application pixels”, not ”device pixels” (see gdk_surface_get_scale_factor()).

leave-monitor

Emitted when @surface stops being present on the monitor.

render

Emitted when part of the surface needs to be redrawn.

Implements

DragSurfaceExt, SurfaceExt, DragSurfaceExtManual, SurfaceExtManual

Implementations

impl DragSurface

pub const NONE: Option<&'static DragSurface> = None

Trait Implementations

impl Clone for DragSurface

fn clone(&self) -> Self

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DragSurface

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for DragSurface

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl HasParamSpec for DragSurface

type ParamSpec = ParamSpecObject

type SetValue = DragSurface

Preferred value to be used as setter for the associated ParamSpec.

type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, DragSurface>

fn param_spec_builder() -> Self::BuilderFn

impl Hash for DragSurface

fn hash<H>(&self, state: &mut H)where H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for DragSurface

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval.

impl<OT: ObjectType> PartialEq<OT> for DragSurface

fn eq(&self, other: &OT) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<OT: ObjectType> PartialOrd<OT> for DragSurface

fn partial_cmp(&self, other: &OT) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl StaticType for DragSurface

fn static_type() -> Type

Returns the type identifier of Self.

impl Eq for DragSurface

impl IsA<Surface> for DragSurface