Enum LifecycleEvent 

pub enum LifecycleEvent {
    Resized {
        width: u32,
        height: u32,
    },
    Focused(bool),
    ScaleFactorChanged {
        scale_factor: f64,
        refresh_rate_millihertz: Option<u32>,
    },
}

Lifecycle events — window/view state changes.

These are NOT input events — they don’t go through hit testing or DOM event dispatch. They’re handled directly by the view’s rendering pipeline (layout invalidation, viewport update, etc.).

Chrome equivalent: separate IPC messages like WidgetMsg_Resize, WidgetMsg_SetFocus, WidgetMsg_UpdateScreenInfo.

Variants

Resized

The view’s area was resized. Triggers layout invalidation.

Width and height in physical pixels.

Fields

width: u32

height: u32

Focused(bool)

The view gained or lost focus. Triggers focus/blur DOM events and caret visibility.

ScaleFactorChanged

The display changed (e.g., moved to a different monitor). Triggers re-layout at the new DPI and updates frame budget.

Chrome equivalent: WidgetMsg_UpdateScreenInfo with new device_scale_factor + vsync interval.

Fields

scale_factor: f64

refresh_rate_millihertz: Option<u32>

Display refresh rate in millihertz (e.g., 144000 = 144Hz). None = unknown → keep current budget.

Trait Implementations

impl Clone for LifecycleEvent

fn clone(&self) -> LifecycleEvent

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LifecycleEvent

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

Formats the value using the given formatter.

impl Copy for LifecycleEvent