Struct i_slint_core::item_rendering::CachedRenderingData

#[repr(C)]
pub struct CachedRenderingData { /* private fields */ }

This structure must be present in items that are Rendered and contains information. Used by the backend.

Implementations

impl CachedRenderingData

pub fn get_or_update<T: Clone>(
    &self,
    cache: &RefCell<RenderingCache<T>>,
    update_fn: impl FnOnce() -> T
) -> T

This function allows retrieving the backend specific per-item data cache, updating it if depending properties have changed. The supplied update_fn will be called when properties have changed or the cache is initialized the first time.

pub fn release<T>(&self, cache: &mut RenderingCache<T>) -> Option<T>

This function can be used to remove an entry from the rendering cache for a given item, if it exists, i.e. if any data was ever cached. This is typically called by the graphics backend’s implementation of the release_item_graphics_cache function.

pub fn get_entry<'a, T>(
    &self,
    cache: &'a mut RenderingCache<T>
) -> Option<&'a mut CachedGraphicsData<T>>

Return the value if it is in the cache

Trait Implementations

impl Debug for CachedRenderingData

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

Formats the value using the given formatter.

impl Default for CachedRenderingData

fn default() -> CachedRenderingData

Returns the “default value” for a type.