Struct TooltipHost 

pub struct TooltipHost { /* private fields */ }

One controller owned by crate::app::App — not one tooltip widget per control — is what makes tooltips work for every widget exposing Widget::tooltip with zero per-app wiring, and guarantees at most one chip on screen. Timing is wall-clock through an injected now: Instant, so it’s unit-testable.

Implementations

impl TooltipHost

pub fn new() -> TooltipHost

pub fn with_dwell(self, dwell: Duration) -> TooltipHost

pub fn on_pointer( &mut self, target: Option<(Rect, String)>, now: Instant, ) -> bool

Re-hovering the same region keeps the accumulated dwell (so a jittering pointer still reveals); moving to a different region restarts it. Returns true when the caller should request a redraw.

pub fn refresh(&mut self, target: Option<(Rect, String)>)

What the region under a shown tooltip says now: a new label for the same region replaces the shown one without restarting the dwell; the region gone or moved hides it.

pub fn dismiss(&mut self) -> bool

Returns whether anything was showing/pending, so the caller can request a redraw to clear the chip.

pub fn tick(&mut self, now: Instant) -> bool

Returns true on the tick it becomes visible.

pub fn visible(&self) -> Option<(&str, Rect)>

The label is the raw string the region exposed; the caller resolves i18n and renders via draw_hover_tooltip.

pub fn needs_frame(&self) -> bool

Trait Implementations

impl Debug for TooltipHost

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

Formats the value using the given formatter.

impl Default for TooltipHost

fn default() -> TooltipHost

Returns the “default value” for a type.