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egui-winit: Automatically detect and apply dark or light mode (#1045)

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This commit is contained in:
Emil Ernerfeldt
2022-02-02 17:09:36 +01:00
committed by GitHub
parent 270c08a030
commit c3be566574
8 changed files with 601 additions and 15 deletions
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23
egui-winit/src/epi.rs
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@@ -223,11 +223,13 @@ impl EpiIntegration {
*egui_ctx.memory() = persistence.load_memory().unwrap_or_default();
let prefer_dark_mode = prefer_dark_mode();
let frame = epi::Frame::new(epi::backend::FrameData {
info: epi::IntegrationInfo {
name: integration_name,
web_info: None,
prefer_dark_mode: None, // TODO: figure out system default
prefer_dark_mode,
cpu_usage: None,
native_pixels_per_point: Some(crate::native_pixels_per_point(window)),
},
@@ -235,6 +237,12 @@ impl EpiIntegration {
repaint_signal,
});
if prefer_dark_mode == Some(true) {
egui_ctx.set_visuals(egui::Visuals::dark());
} else {
egui_ctx.set_visuals(egui::Visuals::light());
}
let mut slf = Self {
frame,
persistence,
@@ -340,3 +348,16 @@ impl EpiIntegration {
.save(&mut *self.app, &self.egui_ctx, window);
}
}
#[cfg(feature = "dark-light")]
fn prefer_dark_mode() -> Option<bool> {
match dark_light::detect() {
dark_light::Mode::Dark => Some(true),
dark_light::Mode::Light => Some(false),
}
}
#[cfg(not(feature = "dark-light"))]
fn prefer_dark_mode() -> Option<bool> {
None
}