Struct gtk4::EventController

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

EventController is the base class for event controllers.

These are ancillary objects associated to widgets, which react to GdkEvents, and possibly trigger actions as a consequence.

Event controllers are added to a widget with WidgetExt::add_controller(). It is rarely necessary to explicitly remove a controller with WidgetExt::remove_controller().

See the chapter on input handling for an overview of the basic concepts, such as the capture and bubble phases of even propagation.

This is an Abstract Base Class, you cannot instantiate it.

Properties

name

The name for this controller, typically used for debugging purposes.

Readable | Writeable

propagation-limit

The limit for which events this controller will handle.

Readable | Writeable

propagation-phase

The propagation phase at which this controller will handle events.

Readable | Writeable

widget

The widget receiving the GdkEvents that the controller will handle.

Readable

Implements

EventControllerExt, glib::ObjectExt

Implementations

impl EventController

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

Trait Implementations

impl Clone for EventController

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 EventController

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

Formats the value using the given formatter.

impl Display for EventController

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

Formats the value using the given formatter.

impl HasParamSpec for EventController

type ParamSpec = ParamSpecObject

type SetValue = EventController

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

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

fn param_spec_builder() -> Self::BuilderFn

impl Hash for EventController

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 EventController

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 ParentClassIs for EventController

type Parent = Object

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

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 EventController

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 EventController

fn static_type() -> Type

Returns the type identifier of Self.

impl Eq for EventController

impl IsA<EventController> for DragSource

impl IsA<EventController> for DropControllerMotion

impl IsA<EventController> for DropTarget

impl IsA<EventController> for DropTargetAsync

impl IsA<EventController> for EventControllerFocus

impl IsA<EventController> for EventControllerKey

impl IsA<EventController> for EventControllerLegacy

impl IsA<EventController> for EventControllerMotion

impl IsA<EventController> for EventControllerScroll

impl IsA<EventController> for Gesture

impl IsA<EventController> for GestureClick

impl IsA<EventController> for GestureDrag

impl IsA<EventController> for GestureLongPress

impl IsA<EventController> for GesturePan

impl IsA<EventController> for GestureRotate

impl IsA<EventController> for GestureSingle

impl IsA<EventController> for GestureStylus

impl IsA<EventController> for GestureSwipe

impl IsA<EventController> for GestureZoom

impl IsA<EventController> for PadController

impl IsA<EventController> for ShortcutController