Struct lv2_raw::ui::LV2UIIdleInterface [−] [src]

#[repr(C)]
pub struct LV2UIIdleInterface {
    pub idle: extern "C" fn(_: LV2UIHandle) -> 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: extern "C" fn(_: LV2UIHandle) -> 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().