Enum Event

pub enum Event<T> {
    Pressed,
    Pressing,
    PressLost,
    ShortClicked,
    Clicked,
    LongPressed,
    LongPressedRepeat,
    Released,
    Pointer(PointerEvent),
    Special(T),
}

Events are triggered in LVGL when something happens which might be interesting to the user, e.g. if an object:

• is clicked
• is dragged
• its value has changed, etc.

All objects (such as Buttons/Labels/Sliders etc.) receive these generic events regardless of their type.

Variants

Pressed

The object has been pressed

Pressing

The object is being pressed (sent continuously while pressing)

PressLost

The input device is still being pressed but is no longer on the object

ShortClicked

Released before long_press_time config time. Not called if dragged.

Clicked

Called on release if not dragged (regardless to long press)

LongPressed

Pressing for long_press_time config time. Not called if dragged.

LongPressedRepeat

Called after long_press_time config in every long_press_rep_time ms. Not called if dragged.

Released

Called in every case when the object has been released even if it was dragged. Not called if slid from the object while pressing and released outside of the object. In this case, Event<_>::PressLost is sent.

Pointer(PointerEvent)

Pointer-like input devices events (E.g. mouse or touchpad)

Special(T)

Special event for the object type

Trait Implementations

impl<T: Clone> Clone for Event<T>

fn clone(&self) -> Event<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Event<T>

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

Formats the value using the given formatter.

impl<S> From<Event<S>> for lv_event_code_t

fn from(event: Event<S>) -> Self

Converts to this type from the input type.

impl<T: Ord> Ord for Event<T>

fn cmp(&self, other: &Event<T>) -> Ordering

This method returns an Ordering between self and other.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<T: PartialEq> PartialEq for Event<T>

fn eq(&self, other: &Event<T>) -> bool

Tests for self and other values to be equal, and is used by ==.

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

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

impl<T: PartialOrd> PartialOrd for Event<T>

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl<S> TryFrom<u32> for Event<S>

type Error = ()

The type returned in the event of a conversion error.

fn try_from(value: lv_event_code_t) -> Result<Self, Self::Error>

Performs the conversion.

impl<T: Copy> Copy for Event<T>

impl<T: Eq> Eq for Event<T>

impl<T> StructuralPartialEq for Event<T>