Request_redraw() call from a task spawned by async_std::task::spawn_local doesn’t produce RedrawRequested event.

[VincentJousse]

Request_redraw() call from a task spawned by async_std::task::spawn_local doesn’t produce RedrawRequested event.
Need to wait for another event like a mouse event to receive the RedrawRequested event.

[maroider]

What platform does this happen on?

[VincentJousse]

Sorry about this, I forgot this information !
It happens on the web.
See my previous bug which covered macOS and web : #1763

[daxpedda]

I just hit that and started investigating it, the problem is very simple: request_redraw() doesn't wake up the event loop, it just queues the request but does nothing else.

A simple workaround is just to send a custom event, which actually does the whole waking up process.
Working on a PR!