show msg when running a command

src/main.rs

@@ -1,7 +1,7 @@
 #![windows_subsystem = "windows"]
-use bevy::{prelude::*, winit::WinitSettings};
+use bevy::{prelude::*, utils::Duration, winit::WinitSettings};
 use bevy_egui::{
-    egui::{self},
+    egui::{self, Color32},
     EguiContexts, EguiPlugin,
 };
 
@@ -25,14 +25,29 @@ struct NeedsStrip {
     value: bool,
 }
 
+#[derive(Resource, Debug)]
+struct UITimer(Timer);
+
+#[derive(Resource, Debug)]
+struct Msg {
+    value: String,
+}
+
 fn main() {
     App::new()
-        .insert_resource(WinitSettings::desktop_app())
+        .insert_resource(WinitSettings {
+            focused_mode: bevy::winit::UpdateMode::Continuous,
+            unfocused_mode: bevy::winit::UpdateMode::reactive_low_power(Duration::from_millis(10)),
+        })
         .insert_resource(InputText {
             value: "".to_string(),
         })
+        .insert_resource(Msg {
+            value: "".to_string(),
+        })
         .insert_resource(NeedsSort { value: false })
         .insert_resource(NeedsStrip { value: false })
+        .insert_resource(UITimer(Timer::from_seconds(3., TimerMode::Once)))
         .add_plugins(DefaultPlugins.set(WindowPlugin {
             primary_window: Some(Window {
                 title: "dsort".to_string(),
@@ -41,6 +56,7 @@ fn main() {
             ..Default::default()
         }))
         .add_plugins(EguiPlugin)
+        .add_systems(Startup, ui_startup)
         .add_systems(Update, ui_system)
         .add_systems(Update, process_text)
         .run();
@@ -78,13 +94,26 @@ fn button_clicked(button: egui::Response) -> bool {
     button.clicked() || button.drag_stopped()
 }
 
+fn ui_startup(mut contexts: EguiContexts, mut timer: ResMut<UITimer>) {
+    contexts.ctx_mut().set_visuals(egui::Visuals::light());
+    let duration = timer.0.duration();
+    timer.0.set_elapsed(duration);
+}
+
 fn ui_system(
     mut contexts: EguiContexts,
     mut input_text: ResMut<InputText>,
     mut needs_sort: ResMut<NeedsSort>,
     mut needs_strip: ResMut<NeedsStrip>,
+    time: Res<Time>,
+    mut timer: ResMut<UITimer>,
+    mut msg: ResMut<Msg>,
 ) {
-    contexts.ctx_mut().set_visuals(egui::Visuals::light());
+    timer.0.tick(time.delta());
+
+    if timer.0.finished() {
+        msg.value = "".to_string();
+    }
 
     egui::CentralPanel::default().show(contexts.ctx_mut(), |ui| {
         let window_size = ui.available_size();
@@ -92,25 +121,42 @@ fn ui_system(
 
         ui.with_layout(egui::Layout::top_down(egui::Align::Center), |ui| {
             ui.with_layout(egui::Layout::left_to_right(egui::Align::LEFT), |ui| {
-                let sort_button = ui.add(button("Sort"));
+                let sort_button = ui.add(button("sort"));
                 if button_clicked(sort_button) {
                     needs_sort.value = true;
+                    msg.value = "sorted!".to_string();
+                    timer.0.reset();
                 }
 
-                let strip_button = ui.add(button("Remove Blanks"));
+                let strip_button = ui.add(button("remove blanks"));
                 if button_clicked(strip_button) {
                     needs_strip.value = true;
+                    msg.value = "blanks removed!".to_string();
+                    timer.0.reset();
                 }
 
-                let copy_button = ui.add(button("Copy"));
+                let copy_button = ui.add(button("copy"));
                 if button_clicked(copy_button) {
                     ui.output_mut(|o| o.copied_text = input_text.value.clone());
+                    msg.value = "copied!".to_string();
+                    timer.0.reset();
                 }
 
-                let clear_button = ui.add(button("Clear"));
+                let clear_button = ui.add(button("clear"));
                 if button_clicked(clear_button) {
                     input_text.value = "".to_string();
+                    msg.value = "cleared!".to_string();
+                    timer.0.reset();
                 }
+                ui.with_layout(
+                    egui::Layout::default().with_cross_align(egui::Align::RIGHT),
+                    |ui| {
+                        ui.label(
+                            egui::RichText::new(&msg.value)
+                                .background_color(Color32::from_gray(200)),
+                        )
+                    },
+                );
             });
 
             ui.add_space(5.);