How do I "handle" an event in a control?

[bellwether-softworks]

My scenario: I'm using a code editor to maintain some text, and want to execute a certain behavior when I perform a CTRL+Enter while the control has focus. I have something working, though it feels a bit sketchy:

let mut editor_text = String::new();
let editor = ui.add(
    egui::TextEdit::multiline(&mut editor_text)
        .code_editor()
        .desired_width(f32::INFINITY)
);

let events = &ui.input().events;

if editor.has_focus() && events.iter().any(|evt| match evt {
    Event::Key { key, modifiers, pressed } => {
        key == &Key::Enter && *pressed && modifiers.ctrl
    },
    _ => false
}) {
    perform_behavior();
}

My dilemma: I can successfully perform the behavior as intended, but the CTRL+Enter sequence also causes the text contents of the control to change. This isn't a big deal given my use-case, but it does help to pose a broader question of how to correctly handle and dequeue such events prior to a control processing them. Scanning through code and examples didn't turn anything up, though maybe I missed something?

[BctfN0HUK7Yg]

I think you should fork egui and fix something here

egui/egui/src/widgets/text_edit/builder.rs

Line 727 in ad54187

key: Key::Enter,

[emilk]

Good question! I haven't thought through this use case much yet. I think the only solution is to catch the events before running the TextEdit code. Perhaps something like this:

let text_edit_id = Id::new("my_code_editor");
let editor_has_focus = ui.ctx().memory().has_focus(self.id);
if editor_has_focus && events.iter().any(|evt|
    matches!(evt,
        Event::Key { key, modifiers, pressed }
        if key == &Key::Enter && *pressed && modifiers.ctrl
    )) {
    ui.ctx().memory().surrender_focus(self.id);
    perform_behavior();
}

let editor = ui.add(
    egui::TextEdit::multiline(&mut editor_text)
        .id(text_edit_id)
        .code_editor()
        .desired_width(f32::INFINITY)
);