Commands are not proccessed after update

[maan2003]

to reproduce: make sure after 1sec window receives no events (extend the time if needed). "send command in update" will be logged but "got command" will only be logged after next window event

use std::time::Duration;

use druid::widget::prelude::*;
use druid::{AppLauncher, Selector, WindowDesc};
use tracing::info;

struct CustomWidget;

const DOIT: Selector = Selector::new("druid-issue.commands-not-in-update");

impl Widget<()> for CustomWidget {
    fn event(&mut self, ctx: &mut EventCtx, event: &Event, _data: &mut (), _env: &Env) {
        match event {
            Event::WindowConnected => {
                ctx.request_timer(Duration::from_millis(1000));
            }
            Event::Timer(_) => {
                ctx.request_update();
            }
            Event::Command(cmd) if cmd.is(DOIT) => {
                info!("got command");
            }
            _ => {}
        }
    }

    fn lifecycle(&mut self, _ctx: &mut LifeCycleCtx, _event: &LifeCycle, _data: &(), _env: &Env) {}

    fn update(&mut self, ctx: &mut UpdateCtx, _old_data: &(), _data: &(), _env: &Env) {
        info!("send command in update");
        ctx.submit_command(DOIT);
    }

    fn layout(
        &mut self,
        _layout_ctx: &mut LayoutCtx,
        _bc: &BoxConstraints,
        _data: &(),
        _env: &Env,
    ) -> Size {
        Size::ZERO
    }

    fn paint(&mut self, _ctx: &mut PaintCtx, _data: &(), _env: &Env) {}
}

pub fn main() {
    AppLauncher::with_window(WindowDesc::new(CustomWidget))
        .log_to_console()
        .launch(())
        .expect("launch failed");
}

[Alban-Boissard]

Hi, I have to deal with this bug in a small App build on druid 0.7. Is it still present is the master branch ? And if yes, is there a not too ugly workaround ? thank for creating druid, it's a very pleasant Gui to work with.

[maan2003]

yes this is present on master branch. and a workaround is used in nursery

[Alban-Boissard]

Thanks a lot for the workaround !