Struct egui::interaction::InteractionSnapshot

pub struct InteractionSnapshot {
    pub clicked: Option<Id>,
    pub long_touched: Option<Id>,
    pub drag_started: Option<Id>,
    pub dragged: Option<Id>,
    pub drag_stopped: Option<Id>,
    pub hovered: HashSet<Id, BuildIdHasher>,
    pub contains_pointer: HashSet<Id, BuildIdHasher>,
}

Calculated at the start of each frame based on:

• Widget rects from precious frame
• Mouse/touch input
• Current InteractionState.

Fields

clicked: Option<Id>

The widget that got clicked this frame.

long_touched: Option<Id>

This widget was long-pressed on a touch screen, so trigger a secondary click on it (context menu).

drag_started: Option<Id>

Drag started on this widget this frame.

This will also be found in dragged this frame.

dragged: Option<Id>

This widget is being dragged this frame.

Set the same frame a drag starts, but unset the frame a drag ends.

NOTE: this may not have a corresponding crate::WidgetRect, if this for instance is a drag-and-drop widget which isn’t painted whilst being dragged

drag_stopped: Option<Id>

This widget was let go this frame, after having been dragged.

The widget will not be found in Self::dragged this frame.

hovered: HashSet<Id, BuildIdHasher>

A small set of widgets (usually 0-1) that the pointer is hovering over.

Show these widgets as highlighted, if they are interactive.

While dragging or clicking something, nothing else is hovered.

Use Self::contains_pointer to find a drop-zone for drag-and-drop.

contains_pointer: HashSet<Id, BuildIdHasher>

All widgets that contain the pointer this frame, regardless if the user is currently clicking or dragging.

This is usually a larger set than Self::hovered, and can be used for e.g. drag-and-drop zones.

Implementations

impl InteractionSnapshot

pub fn ui(&self, ui: &mut Ui)

Trait Implementations

impl Clone for InteractionSnapshot

fn clone(&self) -> InteractionSnapshot

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for InteractionSnapshot

fn default() -> InteractionSnapshot

Returns the “default value” for a type.