Function OH_ArkUI_RegisterSystemFontStyleChangeEvent 

pub unsafe extern "C" fn OH_ArkUI_RegisterSystemFontStyleChangeEvent(
    node: ArkUI_NodeHandle,
    userData: *mut c_void,
    onFontStyleChange: Option<unsafe extern "C" fn(event: *mut ArkUI_SystemFontStyleEvent, userData: *mut c_void)>,
) -> i32

Available on crate feature api-12 only.

The event called when the system font style changes. Only one system font change callback can be registered for the same component.

Arguments

• node - Indicates the target node.

• userData - Indicates the custom data to be saved.

• onFontStyleChange - Callback Events.

Returns

• Error code. [ARKUI_ERROR_CODE_NO_ERROR] Success. [ARKUI_ERROR_CODE_PARAM_INVALID] Function parameter exception.

Available since API-level: 12