Enum On 

#[repr(C)]
pub enum On {
    MouseOver = 0,
    MouseDown = 1,
    LeftMouseDown = 2,
    MiddleMouseDown = 3,
    RightMouseDown = 4,
    MouseUp = 5,
    LeftMouseUp = 6,
    MiddleMouseUp = 7,
    RightMouseUp = 8,
    MouseEnter = 9,
    MouseLeave = 10,
    Scroll = 11,
    TextInput = 12,
    VirtualKeyDown = 13,
    VirtualKeyUp = 14,
    HoveredFile = 15,
    DroppedFile = 16,
    HoveredFileCancelled = 17,
    FocusReceived = 18,
    FocusLost = 19,
    Default = 20,
    Collapse = 21,
    Expand = 22,
    Increment = 23,
    Decrement = 24,
}

Defines the type of event that can trigger a callback action.

Variants

MouseOver = 0

Mouse cursor is hovering over the element.

MouseDown = 1

Mouse cursor has is over element and is pressed (not good for “click” events - use MouseUp instead).

LeftMouseDown = 2

(Specialization of MouseDown). Fires only if the left mouse button has been pressed while cursor was over the element.

MiddleMouseDown = 3

(Specialization of MouseDown). Fires only if the middle mouse button has been pressed while cursor was over the element.

RightMouseDown = 4

(Specialization of MouseDown). Fires only if the right mouse button has been pressed while cursor was over the element.

MouseUp = 5

Mouse button has been released while cursor was over the element.

LeftMouseUp = 6

(Specialization of MouseUp). Fires only if the left mouse button has been released while cursor was over the element.

MiddleMouseUp = 7

(Specialization of MouseUp). Fires only if the middle mouse button has been released while cursor was over the element.

RightMouseUp = 8

(Specialization of MouseUp). Fires only if the right mouse button has been released while cursor was over the element.

MouseEnter = 9

Mouse cursor has entered the element.

MouseLeave = 10

Mouse cursor has left the element.

Scroll = 11

Mousewheel / touchpad scrolling.

TextInput = 12

The window received a unicode character (also respects the system locale). Check keyboard_state.current_char to get the current pressed character.

VirtualKeyDown = 13

A virtual keycode was pressed. Note: This is only the virtual keycode, not the actual char. If you want to get the character, use TextInput instead. A virtual key does not have to map to a printable character.

You can get all currently pressed virtual keycodes in the keyboard_state.current_virtual_keycodes and / or just the last keycode in the keyboard_state.latest_virtual_keycode.

VirtualKeyUp = 14

A virtual keycode was release. See VirtualKeyDown for more info.

HoveredFile = 15

A file has been dropped on the element.

DroppedFile = 16

A file is being hovered on the element.

HoveredFileCancelled = 17

A file was hovered, but has exited the window.

FocusReceived = 18

Equivalent to onfocus.

FocusLost = 19

Equivalent to onblur.

Default = 20

Default action triggered by screen reader (usually same as click/activate)

Collapse = 21

Element should collapse (e.g., accordion panel, tree node)

Expand = 22

Element should expand (e.g., accordion panel, tree node)

Increment = 23

Increment value (e.g., number input, slider)

Decrement = 24

Decrement value (e.g., number input, slider)

Trait Implementations

impl Clone for On

fn clone(&self) -> On

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for On

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

Formats the value using the given formatter.

impl From<On> for EventFilter

Convert from On enum to EventFilter.

This determines which specific filter variant is used based on the event type. For example, On::TextInput becomes a Focus event filter, while On::VirtualKeyDown becomes a Window event filter (since it’s global to the window).

fn from(input: On) -> EventFilter

Converts to this type from the input type.

impl Hash for On

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

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 On

fn cmp(&self, other: &On) -> 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 PartialEq for On

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

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

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 PartialOrd for On

fn partial_cmp(&self, other: &On) -> 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 Copy for On

impl Eq for On

impl StructuralPartialEq for On