Remove "seconds_since_midnight" from epi/eframe. Use chrono instead

chrono works both natively and on web.

Related: https://github.com/emilk/egui/issues/212

egui_glium/Cargo.toml

@@ -32,9 +32,6 @@ directories-next = { version = "2", optional = true }
 ron = { version = "0.6", optional = true }
 serde = { version = "1", optional = true }
 
-# feature "time"
-chrono = { version = "0.4", optional = true }
-
 [dev-dependencies]
 image = { version = "0.23", default-features = false, features = ["png"] }
 
@@ -63,6 +60,3 @@ persistence = [
 
 # experimental support for a screen reader
 screen_reader = ["egui-winit/screen_reader"]
-
-# for seconds_since_midnight (used in egui_demo_lib)
-time = ["chrono"]

egui_glium/src/backend.rs

@@ -149,7 +149,6 @@ fn integration_info(
         web_info: None,
         prefer_dark_mode: None, // TODO: figure out system default
         cpu_usage: previous_frame_time,
-        seconds_since_midnight: seconds_since_midnight(),
         native_pixels_per_point: Some(native_pixels_per_point(display)),
     }
 }

egui_glium/src/lib.rs

@@ -91,20 +91,6 @@ use glium::glutin;
 
 // ----------------------------------------------------------------------------
 
-/// Time of day as seconds since midnight. Used for clock in demo app.
-pub fn seconds_since_midnight() -> Option<f64> {
-    #[cfg(feature = "time")]
-    {
-        use chrono::Timelike;
-        let time = chrono::Local::now().time();
-        let seconds_since_midnight =
-            time.num_seconds_from_midnight() as f64 + 1e-9 * (time.nanosecond() as f64);
-        Some(seconds_since_midnight)
-    }
-    #[cfg(not(feature = "time"))]
-    None
-}
-
 pub fn screen_size_in_pixels(display: &glium::Display) -> egui::Vec2 {
     let (width_in_pixels, height_in_pixels) = display.get_framebuffer_dimensions();
     egui::vec2(width_in_pixels as f32, height_in_pixels as f32)