migrations/egui
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[app] Add demo app slider to change scale of all of Egui

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This commit is contained in:
Emil Ernerfeldt
2020-10-17 23:54:46 +02:00
parent 251cde60f0
commit a4e19d7207
9 changed files with 149 additions and 85 deletions
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19
egui_glium/src/backend.rs
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@@ -51,7 +51,10 @@ pub fn run(title: &str, mut storage: FileStorage, mut app: impl App + 'static) -
let mut ctx = egui::Context::new();
*ctx.memory() = egui::app::get_value(&storage, EGUI_MEMORY_KEY).unwrap_or_default();
let mut raw_input = make_raw_input(&display);
let mut raw_input = egui::RawInput {
pixels_per_point: Some(native_pixels_per_point(&display)),
..Default::default()
};
let start_time = Instant::now();
let mut previous_frame_time = None;
@@ -62,11 +65,14 @@ pub fn run(title: &str, mut storage: FileStorage, mut app: impl App + 'static) -
let mut redraw = || {
let egui_start = Instant::now();
raw_input.time = start_time.elapsed().as_nanos() as f64 * 1e-9;
raw_input.screen_size =
screen_size_in_pixels(&display) / raw_input.pixels_per_point.unwrap();
let backend_info = egui::app::BackendInfo {
web_info: None,
cpu_usage: previous_frame_time,
seconds_since_midnight: Some(seconds_since_midnight()),
native_pixels_per_point: Some(native_pixels_per_point(&display)),
};
let mut ui = ctx.begin_frame(raw_input.take());
@@ -75,10 +81,17 @@ pub fn run(title: &str, mut storage: FileStorage, mut app: impl App + 'static) -
let frame_time = (Instant::now() - egui_start).as_secs_f64() as f32;
previous_frame_time = Some(frame_time);
painter.paint_jobs(&display, paint_jobs, &ctx.texture());
painter.paint_jobs(&display, ctx.pixels_per_point(), paint_jobs, &ctx.texture());
{
let egui::app::AppOutput { quit } = app_output;
let egui::app::AppOutput {
quit,
pixels_per_point,
} = app_output;
if let Some(pixels_per_point) = pixels_per_point {
// User changed GUI scale
raw_input.pixels_per_point = Some(pixels_per_point);
}
*control_flow = if quit {
glutin::event_loop::ControlFlow::Exit