Struct i_slint_core::graphics::CachedGraphicsData

pub struct CachedGraphicsData<T> {
    pub data: T,
    pub dependency_tracker: Option<Pin<Box<PropertyTracker>>>,
}

CachedGraphicsData allows the graphics backend to store an arbitrary piece of data associated with an item, which is typically computed by accessing properties. The dependency_tracker is used to allow for a lazy computation. Typically back ends store either compute intensive data or handles that refer to data that’s stored in GPU memory.

Fields

data: T

The backend specific data.

dependency_tracker: Option<Pin<Box<PropertyTracker>>>

The property tracker that should be used to evaluate whether the primitive needs to be re-created or not.

Implementations

impl<T> CachedGraphicsData<T>

pub fn new(update_fn: impl FnOnce() -> T) -> Self

Creates a new TrackingRenderingPrimitive by evaluating the provided update_fn once, storing the returned rendering primitive and initializing the dependency tracker.