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[egui_glium] Your app state will auto-save to a good directory

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Directory found with https://docs.rs/directories-next/2.0.0/directories_next/struct.ProjectDirs.html#method.data_dir
This commit is contained in:
Emil Ernerfeldt
2020-12-19 21:06:59 +01:00
parent 89937bf636
commit 8f034d391d
5 changed files with 114 additions and 22 deletions
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75
egui_glium/src/backend.rs
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@@ -63,18 +63,48 @@ fn create_display(
glium::Display::new(window_builder, context_builder, &event_loop).unwrap()
}
fn create_storage(app_name: &str) -> Option<Box<dyn egui::app::Storage>> {
if let Some(proj_dirs) = directories_next::ProjectDirs::from("", "", app_name) {
let data_dir = proj_dirs.data_dir().to_path_buf();
if let Err(err) = std::fs::create_dir_all(&data_dir) {
eprintln!(
"Saving disabled: Failed to create app path at {:?}: {}",
data_dir, err
);
None
} else {
let mut config_dir = data_dir;
config_dir.push("app.json");
let storage = crate::storage::FileStorage::from_path(config_dir);
Some(Box::new(storage))
}
} else {
eprintln!("Saving disabled: Failed to find path to data_dir.");
None
}
}
/// Run an egui app
pub fn run(mut storage: Box<dyn egui::app::Storage>, mut app: Box<dyn App>) -> ! {
app.load(storage.as_ref());
let window_settings: Option<WindowSettings> =
egui::app::get_value(storage.as_ref(), WINDOW_KEY);
pub fn run(mut app: Box<dyn App>) -> ! {
let mut storage = create_storage(app.name());
if let Some(storage) = &mut storage {
app.load(storage.as_ref());
}
let window_settings: Option<WindowSettings> = storage
.as_mut()
.and_then(|storage| egui::app::get_value(storage.as_ref(), WINDOW_KEY));
let event_loop = glutin::event_loop::EventLoop::with_user_event();
let display = create_display(app.name(), window_settings, &event_loop);
let repaint_signal = std::sync::Arc::new(GliumRepaintSignal(event_loop.create_proxy()));
let mut ctx = egui::CtxRef::default();
*ctx.memory() = egui::app::get_value(storage.as_ref(), EGUI_MEMORY_KEY).unwrap_or_default();
*ctx.memory() = storage
.as_mut()
.and_then(|storage| egui::app::get_value(storage.as_ref(), EGUI_MEMORY_KEY))
.unwrap_or_default();
app.setup(&ctx);
let mut input_state = GliumInputState::from_pixels_per_point(native_pixels_per_point(&display));
@@ -84,6 +114,8 @@ pub fn run(mut storage: Box<dyn egui::app::Storage>, mut app: Box<dyn App>) -> !
let mut painter = Painter::new(&display);
let mut clipboard = init_clipboard();
let mut last_auto_save = Instant::now();
event_loop.run(move |event, _, control_flow| {
let mut redraw = || {
let frame_start = Instant::now();
@@ -153,6 +185,21 @@ pub fn run(mut storage: Box<dyn egui::app::Storage>, mut app: Box<dyn App>) -> !
}
handle_output(egui_output, &display, clipboard.as_mut());
if let Some(storage) = &mut storage {
let now = Instant::now();
if now - last_auto_save > app.auto_save_interval() {
egui::app::set_value(
storage.as_mut(),
WINDOW_KEY,
&WindowSettings::from_display(&display),
);
egui::app::set_value(storage.as_mut(), EGUI_MEMORY_KEY, &*ctx.memory());
app.save(storage.as_mut());
storage.flush();
last_auto_save = now;
}
}
};
match event {
@@ -167,15 +214,17 @@ pub fn run(mut storage: Box<dyn egui::app::Storage>, mut app: Box<dyn App>) -> !
display.gl_window().window().request_redraw(); // TODO: ask Egui if the events warrants a repaint instead
}
glutin::event::Event::LoopDestroyed => {
egui::app::set_value(
storage.as_mut(),
WINDOW_KEY,
&WindowSettings::from_display(&display),
);
egui::app::set_value(storage.as_mut(), EGUI_MEMORY_KEY, &*ctx.memory());
app.save(storage.as_mut());
app.on_exit();
storage.flush();
if let Some(storage) = &mut storage {
egui::app::set_value(
storage.as_mut(),
WINDOW_KEY,
&WindowSettings::from_display(&display),
);
egui::app::set_value(storage.as_mut(), EGUI_MEMORY_KEY, &*ctx.memory());
app.save(storage.as_mut());
storage.flush();
}
}
glutin::event::Event::UserEvent(RequestRepaintEvent) => {