Module tooltip 

Tooltip primitive — a small label revealed after a short hover delay.

on_hover_enter/on_hover_leave/tick drive the timing state so the primitive is unit-testable without a winit event loop or a wall clock.

Structs

Tooltip

TooltipHost

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.

Enums

TooltipSide

Which side of its control a tooltip prefers. A control in a row has its neighbours beside it, so its chip goes below; one in a vertical rail has them above and below, so its chip goes beside it, where it hides none of them.

Constants

DEFAULT_DELAY

HOVER_DWELL

Middle of the 400-600ms comfort band: shows help promptly on a deliberate hover without firing on a pointer merely passing through.

Functions

chip_paint_bounds

Every pixel draw_chip can paint for a chip at rect: the chip, its edge and snapping, and the floating shadow under it.

chip_reach_above

How far above its anchor a one-line chip reaches when chip_rect stands it there: its gap off the anchor, its height and the margin it keeps inside its viewport. A viewport with this much room above the anchor holds the chip there.

chip_rect

Preferred placement is centred just below the anchor; flips above when it would spill past the bottom edge and there is more room above. Clamped horizontally too, so a control at the far edge gets a chip that hugs it instead of painting off-screen.

chip_rect_on

chip_rect on the preferred side of the anchor.

chip_size

The chip’s size for label: wrapped Caption text plus the chip’s pads.

chip_size_in_viewport

Measure the complete hint at the width its viewport can actually hold.

draw_chip

The floating material every floating surface is made of (blurred where the renderer runs the backdrop pass, the opaque panel ground otherwise), with the panel edge, at the control radius: a tooltip is a small floating Panel, not a card.

draw_hover_tooltip

Composes chip_size, chip_rect and draw_chip — the one call TooltipHost uses to render a tooltip.

draw_hover_tooltip_on

draw_hover_tooltip on the side of its anchor the control prefers.

draw_marked_tooltip_on

A chip saying label at anchor, marked by a dot in color before it: what a control says about itself after the person used it (why it did not run, in the danger colour).

draw_person_tooltip_on

A tooltip naming a person: their presence color as a dot before label, the way presence marks them everywhere else, on the side of anchor the control prefers.

hover_chip_rect_on

Where draw_hover_tooltip_on places the chip for label.