use crate::{epi, Theme, WindowInfo};
use egui_winit::{native_pixels_per_point, WindowSettings};
use winit::event_loop::EventLoopWindowTarget;
#[cfg(target_os = "linux")]
use winit::platform::unix::WindowBuilderExtUnix;
pub fn points_to_size(points: egui::Vec2) -> winit::dpi::LogicalSize<f64> {
winit::dpi::LogicalSize {
width: points.x as f64,
height: points.y as f64,
}
}
pub fn read_window_info(window: &winit::window::Window, pixels_per_point: f32) -> WindowInfo {
let position = window
.outer_position()
.ok()
.map(|pos| pos.to_logical::<f32>(pixels_per_point.into()))
.map(|pos| egui::Pos2 { x: pos.x, y: pos.y });
let size = window
.inner_size()
.to_logical::<f32>(pixels_per_point.into());
WindowInfo {
position,
fullscreen: window.fullscreen().is_some(),
size: egui::Vec2 {
x: size.width,
y: size.height,
},
}
}
pub fn window_builder(
native_options: &epi::NativeOptions,
window_settings: &Option<WindowSettings>,
) -> winit::window::WindowBuilder {
let epi::NativeOptions {
always_on_top,
maximized,
decorated,
fullscreen,
drag_and_drop_support,
icon_data,
initial_window_pos,
initial_window_size,
min_window_size,
max_window_size,
resizable,
transparent,
..
} = native_options;
let window_icon = icon_data.clone().and_then(load_icon);
let mut window_builder = winit::window::WindowBuilder::new()
.with_always_on_top(*always_on_top)
.with_decorations(*decorated)
.with_fullscreen(fullscreen.then(|| winit::window::Fullscreen::Borderless(None)))
.with_maximized(*maximized)
.with_resizable(*resizable)
.with_transparent(*transparent)
.with_window_icon(window_icon);
#[cfg(target_os = "linux")]
{
window_builder = window_builder.with_rgba_visual(true);
window_builder = window_builder.with_app_paintable(true);
window_builder = window_builder.with_double_buffered(true);
window_builder = window_builder.with_transparent_draw(!*transparent);
}
if let Some(min_size) = *min_window_size {
window_builder = window_builder.with_min_inner_size(points_to_size(min_size));
}
if let Some(max_size) = *max_window_size {
window_builder = window_builder.with_max_inner_size(points_to_size(max_size));
}
window_builder = window_builder_drag_and_drop(window_builder, *drag_and_drop_support);
if let Some(window_settings) = window_settings {
window_builder = window_settings.initialize_window(window_builder);
} else {
if let Some(pos) = *initial_window_pos {
window_builder = window_builder.with_position(winit::dpi::PhysicalPosition {
x: pos.x as f64,
y: pos.y as f64,
});
}
if let Some(initial_window_size) = *initial_window_size {
window_builder = window_builder.with_inner_size(points_to_size(initial_window_size));
}
}
window_builder
}
fn load_icon(icon_data: epi::IconData) -> Option<winit::window::Icon> {
winit::window::Icon::from_rgba(icon_data.rgba, icon_data.width, icon_data.height).ok()
}
#[cfg(target_os = "windows")]
fn window_builder_drag_and_drop(
window_builder: winit::window::WindowBuilder,
enable: bool,
) -> winit::window::WindowBuilder {
use winit::platform::windows::WindowBuilderExtWindows as _;
window_builder.with_drag_and_drop(enable)
}
#[cfg(not(target_os = "windows"))]
fn window_builder_drag_and_drop(
window_builder: winit::window::WindowBuilder,
_enable: bool,
) -> winit::window::WindowBuilder {
window_builder
}
pub fn handle_app_output(
window: &winit::window::Window,
current_pixels_per_point: f32,
app_output: epi::backend::AppOutput,
) {
let epi::backend::AppOutput {
close: _,
window_size,
window_title,
decorated,
fullscreen,
drag_window,
window_pos,
visible,
} = app_output;
if let Some(decorated) = decorated {
window.set_decorations(decorated);
}
if let Some(window_size) = window_size {
window.set_inner_size(
winit::dpi::PhysicalSize {
width: (current_pixels_per_point * window_size.x).round(),
height: (current_pixels_per_point * window_size.y).round(),
}
.to_logical::<f32>(native_pixels_per_point(window) as f64),
);
}
if let Some(fullscreen) = fullscreen {
window.set_fullscreen(fullscreen.then(|| winit::window::Fullscreen::Borderless(None)));
}
if let Some(window_title) = window_title {
window.set_title(&window_title);
}
if let Some(window_pos) = window_pos {
window.set_outer_position(winit::dpi::PhysicalPosition {
x: window_pos.x as f64,
y: window_pos.y as f64,
});
}
if drag_window {
let _ = window.drag_window();
}
if let Some(visible) = visible {
window.set_visible(visible);
}
}
pub fn create_storage(_app_name: &str) -> Option<Box<dyn epi::Storage>> {
#[cfg(feature = "persistence")]
if let Some(storage) = super::file_storage::FileStorage::from_app_name(_app_name) {
return Some(Box::new(storage));
}
None
}
pub struct EpiIntegration {
pub frame: epi::Frame,
last_auto_save: std::time::Instant,
pub egui_ctx: egui::Context,
pending_full_output: egui::FullOutput,
egui_winit: egui_winit::State,
close: bool,
can_drag_window: bool,
}
impl EpiIntegration {
pub fn new<E>(
event_loop: &EventLoopWindowTarget<E>,
max_texture_side: usize,
window: &winit::window::Window,
system_theme: Option<Theme>,
storage: Option<Box<dyn epi::Storage>>,
#[cfg(feature = "glow")] gl: Option<std::sync::Arc<glow::Context>>,
#[cfg(feature = "wgpu")] wgpu_render_state: Option<egui_wgpu::RenderState>,
) -> Self {
let egui_ctx = egui::Context::default();
*egui_ctx.memory() = load_egui_memory(storage.as_deref()).unwrap_or_default();
let frame = epi::Frame {
info: epi::IntegrationInfo {
system_theme,
cpu_usage: None,
native_pixels_per_point: Some(native_pixels_per_point(window)),
window_info: read_window_info(window, egui_ctx.pixels_per_point()),
},
output: Default::default(),
storage,
#[cfg(feature = "glow")]
gl,
#[cfg(feature = "wgpu")]
wgpu_render_state,
};
let mut egui_winit = egui_winit::State::new(event_loop);
egui_winit.set_max_texture_side(max_texture_side);
let pixels_per_point = window.scale_factor() as f32;
egui_winit.set_pixels_per_point(pixels_per_point);
Self {
frame,
last_auto_save: std::time::Instant::now(),
egui_ctx,
egui_winit,
pending_full_output: Default::default(),
close: false,
can_drag_window: false,
}
}
pub fn warm_up(&mut self, app: &mut dyn epi::App, window: &winit::window::Window) {
crate::profile_function!();
let saved_memory: egui::Memory = self.egui_ctx.memory().clone();
self.egui_ctx.memory().set_everything_is_visible(true);
let full_output = self.update(app, window);
self.pending_full_output.append(full_output); *self.egui_ctx.memory() = saved_memory; self.egui_ctx.clear_animations();
}
pub fn should_close(&self) -> bool {
self.close
}
pub fn on_event(&mut self, app: &mut dyn epi::App, event: &winit::event::WindowEvent<'_>) {
use winit::event::{ElementState, MouseButton, WindowEvent};
match event {
WindowEvent::CloseRequested => self.close = app.on_close_event(),
WindowEvent::Destroyed => self.close = true,
WindowEvent::MouseInput {
button: MouseButton::Left,
state: ElementState::Pressed,
..
} => self.can_drag_window = true,
_ => {}
}
self.egui_winit.on_event(&self.egui_ctx, event);
}
pub fn update(
&mut self,
app: &mut dyn epi::App,
window: &winit::window::Window,
) -> egui::FullOutput {
let frame_start = std::time::Instant::now();
self.frame.info.window_info = read_window_info(window, self.egui_ctx.pixels_per_point());
let raw_input = self.egui_winit.take_egui_input(window);
let full_output = self.egui_ctx.run(raw_input, |egui_ctx| {
crate::profile_scope!("App::update");
app.update(egui_ctx, &mut self.frame);
});
self.pending_full_output.append(full_output);
let full_output = std::mem::take(&mut self.pending_full_output);
{
let mut app_output = self.frame.take_app_output();
app_output.drag_window &= self.can_drag_window; self.can_drag_window = false;
if app_output.close {
self.close = app.on_close_event();
}
handle_app_output(window, self.egui_ctx.pixels_per_point(), app_output);
}
let frame_time = (std::time::Instant::now() - frame_start).as_secs_f64() as f32;
self.frame.info.cpu_usage = Some(frame_time);
full_output
}
pub fn post_rendering(&mut self, app: &mut dyn epi::App, window: &winit::window::Window) {
let inner_size = window.inner_size();
let window_size_px = [inner_size.width, inner_size.height];
app.post_rendering(window_size_px, &self.frame);
}
pub fn handle_platform_output(
&mut self,
window: &winit::window::Window,
platform_output: egui::PlatformOutput,
) {
self.egui_winit
.handle_platform_output(window, &self.egui_ctx, platform_output);
}
pub fn maybe_autosave(&mut self, app: &mut dyn epi::App, window: &winit::window::Window) {
let now = std::time::Instant::now();
if now - self.last_auto_save > app.auto_save_interval() {
self.save(app, window);
self.last_auto_save = now;
}
}
pub fn save(&mut self, _app: &mut dyn epi::App, _window: &winit::window::Window) {
#[cfg(feature = "persistence")]
if let Some(storage) = self.frame.storage_mut() {
crate::profile_function!();
if _app.persist_native_window() {
crate::profile_scope!("native_window");
epi::set_value(
storage,
STORAGE_WINDOW_KEY,
&WindowSettings::from_display(_window),
);
}
if _app.persist_egui_memory() {
crate::profile_scope!("egui_memory");
epi::set_value(storage, STORAGE_EGUI_MEMORY_KEY, &*self.egui_ctx.memory());
}
{
crate::profile_scope!("App::save");
_app.save(storage);
}
crate::profile_scope!("Storage::flush");
storage.flush();
}
}
}
#[cfg(feature = "persistence")]
const STORAGE_EGUI_MEMORY_KEY: &str = "egui";
#[cfg(feature = "persistence")]
const STORAGE_WINDOW_KEY: &str = "window";
pub fn load_window_settings(_storage: Option<&dyn epi::Storage>) -> Option<WindowSettings> {
#[cfg(feature = "persistence")]
{
epi::get_value(_storage?, STORAGE_WINDOW_KEY)
}
#[cfg(not(feature = "persistence"))]
None
}
pub fn load_egui_memory(_storage: Option<&dyn epi::Storage>) -> Option<egui::Memory> {
#[cfg(feature = "persistence")]
{
epi::get_value(_storage?, STORAGE_EGUI_MEMORY_KEY)
}
#[cfg(not(feature = "persistence"))]
None
}