While building my own application using GPUI, I found that the `key_up`
event doesn't fire on Windows or macOS, with each platform failing for
different reasons. These events aren't used anywhere in Zed yet, so it
makes sense that the issue hasn't already been caught.
I don't have a Linux machine set up right now, so I don't know if these
events fire correctly on Linux or not.
---
Without this fix, a simple layout like the following:
```rust
div()
.on_key_down(cx.listener(|_, event, _, _| println!("Key down: {:?}", event)))
.on_key_up(cx.listener(|_, event, _, _| println!("Key up: {:?}", event)));
```
...would result in the following logs if the 'a' key was pressed:
```text
Key down: KeyDownEvent { keystroke: Keystroke { modifiers: Modifiers { control: false, alt: false, shift: false, platform: false, function: false }, key: "a", key_char: Some("a") }, is_held: false }
<eof>
```
With this fix, the `key_up` event fires correctly, resulting in the
following logs:
```text
Key down: KeyDownEvent { keystroke: Keystroke { modifiers: Modifiers { control: false, alt: false, shift: false, platform: false, function: false }, key: "a", key_char: Some("a") }, is_held: false }
Key up: KeyUpEvent { keystroke: Keystroke { modifiers: Modifiers { control: false, alt: false, shift: false, platform: false, function: false }, key: "a", key_char: None } }
<eof>
```
---
I've made the assumption that the `key_char` field shouldn't be set on
the `key_up` event since, unlike the `key_down` event, it's not an event
that may produce a character.
Happy to make any changes to this PR as required. If it would be
preferable to test this on Linux as well before it's merged, let me know
and I'll sort something out.
Hopefully this makes the experience of building new applications on GPUI
smoother, and potentially saves the Zed team some time if this event is
ever used in the future.
Release Notes:
- N/A
Felix Packard
bbd1e628f0