Request repaint when value changes

[zax71]

Hi all, how should I repaint the UI if the return value from a function changes? I've attempted the below, but if there is no mouse movement for a few seconds, and hence no repaints being called for, then it stops. Using the delayed repaint method works better, but still stalls out after some time. If there are more structural changes needed, then the full codebase is at https://github.com/zax71/technus-timecode to reference.

#[derive(Default, Serialize, Deserialize)]
pub struct TimecodeDisplay {
    current_timecode: Timecode,
}

impl TimecodeDisplay {
    pub fn add(&mut self, ctx: &egui::Context, ui: &mut egui::Ui, global_state: &mut GlobalState) {
        ui.label(format!("{}", self.current_timecode));

        // Update the cached timecode value if there is an update
        if let Some(tc) = global_state.mtc_decoder.get_current_timecode() {
            self.current_timecode = tc;
            ctx.request_repaint(); // Keep the timecode updating even when there is no user input
        }
    }
}

Any help would be greatly appreciated!