Struct lv2_sys::LV2UI_Idle_Interface

#[repr(C)]pub struct LV2UI_Idle_Interface {
    pub idle: Option<unsafe extern "C" fn(ui: LV2UI_Handle) -> c_int>,
}

UI Idle Interface (LV2_UI__idleInterface)

UIs can provide this interface to have an idle() callback called by the host rapidly to update the UI.

Fields

idle: Option<unsafe extern "C" fn(ui: LV2UI_Handle) -> c_int>

Run a single iteration of the UI's idle loop.

This will be called rapidly in the UI thread at a rate appropriate for a toolkit main loop. There are no precise timing guarantees, but the host should attempt to call idle() at a high enough rate for smooth animation, at least 30Hz.

@return non-zero if the UI has been closed, in which case the host should stop calling idle(), and can either completely destroy the UI, or re-show it and resume calling idle().

Trait Implementations

impl Clone for LV2UI_Idle_Interface

fn clone(&self) -> LV2UI_Idle_Interface

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for LV2UI_Idle_Interface

impl Debug for LV2UI_Idle_Interface

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

Formats the value using the given formatter.