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Context::request_repaint will wake up the UI thread (#1366)

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This adds a callback (set by `Context::set_request_repaint_callback`)
which integration can use to wake up the UI thread.

eframe (egui_web and egui_glow) will use this, replacing
`epi::Frame::request_repaint`.

Existing code calling `epi::Frame::request_repaint` should be changed
to instead call `egui::Context::request_repaint`.

This is the first callback added to the egui API, which otherwise is
completely driven by data.

The purpose of this is to remove the confusion between the two
`request_repaint` methods (by removing one). Furthermore, it makes
`epi::Frame` a lot simpler, allowing future simplifications to it
(perhaps no longer having it be `Send+Sync+Clone`).
This commit is contained in:
Emil Ernerfeldt
2022-03-15 17:21:52 +01:00
committed by GitHub
parent 6aee4997d4
commit c768d1d48e
12 changed files with 46 additions and 48 deletions
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19
egui_web/src/backend.rs
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@@ -50,12 +50,6 @@ impl NeedRepaint {
}
}
impl epi::backend::RepaintSignal for NeedRepaint {
fn request_repaint(&self) {
self.0.store(true, SeqCst);
}
}
// ----------------------------------------------------------------------------
fn web_location() -> epi::Location {
@@ -150,8 +144,6 @@ impl AppRunner {
let prefer_dark_mode = crate::prefer_dark_mode();
let needs_repaint: std::sync::Arc<NeedRepaint> = Default::default();
let frame = epi::Frame::new(epi::backend::FrameData {
info: epi::IntegrationInfo {
name: "egui_web",
@@ -163,10 +155,19 @@ impl AppRunner {
native_pixels_per_point: Some(native_pixels_per_point()),
},
output: Default::default(),
repaint_signal: needs_repaint.clone(),
});
let needs_repaint: std::sync::Arc<NeedRepaint> = Default::default();
let egui_ctx = egui::Context::default();
{
let needs_repaint = needs_repaint.clone();
egui_ctx.set_request_repaint_callback(move || {
needs_repaint.0.store(true, SeqCst);
});
}
load_memory(&egui_ctx);
if prefer_dark_mode == Some(true) {
egui_ctx.set_visuals(egui::Visuals::dark());