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[egui_web] Fix for pressing tab and backspace in a text field

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Fixes https://github.com/emilk/egui/issues/48
This commit is contained in:
Emil Ernerfeldt 2020-11-18 19:16:13 +01:00
parent 552104429d
commit 90cecace0c
1 changed files with 22 additions and 0 deletions
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22
egui_web/src/lib.rs
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@ -347,6 +347,28 @@ fn install_document_events(runner_ref: &AppRunnerRef) -> Result<(), JsValue> {
runner_lock.input.raw.events.push(egui::Event::Text(key));
}
runner_lock.needs_repaint = true;
// So, shall we call prevent_default?
// YES:
// * Tab (move to next text field)
//
// SOMETIMES:
// * Backspace - when entering text we don't want to go back one page.
//
// NO:
// * F5 / cmd-R (refresh)
// * cmd-shift-C (debug tools)
// * ...
//
// NOTE: if we call prevent_default for cmd-c/v/x, we will prevent copy/paste/cut events.
// Let's do things manually for now:
if matches!(
event.key().as_str(),
"Backspace" // so we don't go back to previous page when deleting text
| "Tab" // so that e.g. tab doesn't move focus to url bar
) {
event.prevent_default();
}
}) as Box<dyn FnMut(_)>);
document.add_event_listener_with_callback("keydown", closure.as_ref().unchecked_ref())?;
closure.forget();