How do I detect if a TextEdit's cursor position was changed

[doonv]

There doesn't seem to be a way to do this from what I've seen.

[YgorSouza]

I don't think there is an API that tells you directly if the cursor changed, but you can get the current value and then compare to the previous value that you stored somewhere.

impl eframe::App for MyApp {
    fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
        egui::CentralPanel::default().show(ctx, |ui| {
            let id = "prev-cursor".into();
            let previous_range = ui.data(|data| data.get_temp(id));
            let range = egui::TextEdit::singleline(&mut self.name)
                .show(ui)
                .cursor_range;
            ui.strong(format!(
                "Changed: {}",
                previous_range.unwrap_or(range) != range
            ));
            ui.label(format!("{range:?}"));
            ui.data_mut(|data| data.insert_temp(id, range));
        });
    }
}

Screencast.from.2024-05-24.21-08-41.mp4

[doonv]

This works, but I still wish there was an API for this.