don't reload every time the filter changes

src/main.rs

@@ -29,6 +29,7 @@ struct Entry {
 	name: String,
 	path: PathBuf,
 	filetype: FileType,
+	visible: bool,
 }
 
 #[derive(PartialEq)]
@@ -87,13 +88,19 @@ impl FileGui {
 			.unwrap()
 			.filter_map(|dir_entry| dir_entry.ok().map(Entry::new))
 			.flatten()
-			.filter(|e| e.name.contains(&self.search_input))
 			.collect();
 		self.entries
 			.sort_by(|a, b| b.is_dir().cmp(&a.is_dir()).then(a.name.cmp(&b.name)));
+		self.refresh_filter();
 		self.loaded_dir = self.current_dir.clone();
 	}
 
+	fn refresh_filter(&mut self) {
+		for entry in &mut self.entries {
+			entry.visible = entry.name.contains(&self.search_input);
+		}
+	}
+
 	fn to_parent(&mut self) {
 		if let Some(path) = self.current_dir.parent() {
 			self.current_dir = path.to_owned();
@@ -115,10 +122,8 @@ impl FileGui {
 			}
 		}
 	}
-}
 
-impl eframe::App for FileGui {
+	fn key_inputs(&mut self, ctx: &egui::Context) {
-	fn update(&mut self, ctx: &egui::Context, frame: &mut Frame) {
 		if ctx.input(|i| i.key_pressed(Key::F) && i.modifiers.ctrl) {
 			ctx.memory_mut(|m| m.request_focus(self.search_input_id));
 		}
@@ -128,6 +133,15 @@ impl eframe::App for FileGui {
 		if ctx.input(|i| i.key_pressed(Key::R) && i.modifiers.ctrl) {
 			self.refresh_entries();
 		}
+		if ctx.input(|i| i.key_pressed(Key::ArrowUp) && i.modifiers.alt) {
+			self.to_parent();
+		}
+	}
+}
+
+impl eframe::App for FileGui {
+	fn update(&mut self, ctx: &egui::Context, frame: &mut Frame) {
+		self.key_inputs(ctx);
 		egui::TopBottomPanel::top("top_bar").show(ctx, |ui| {
 			ui.horizontal(|ui| {
 				if ui.button("⏶").clicked() {
@@ -149,7 +163,7 @@ impl eframe::App for FileGui {
 				let filter_input = ui.text_edit_singleline(&mut self.search_input);
 				self.search_input_id = filter_input.id;
 				if filter_input.changed() {
-					self.refresh_entries();
+					self.refresh_filter();
 				}
 
 				if let Some(filename) = self.loaded_dir.file_name() {
@@ -163,19 +177,24 @@ impl eframe::App for FileGui {
 				.max_scroll_height(frame.info().window_info.size.y)
 				.column(Column::auto())
 				.column(Column::remainder())
-				.body(|body| {
+				.body(|mut body| {
 					let mut to_open = None;
-					body.rows(18.0, self.entries.len(), |row_index, mut row| {
+					for (row_index, entry) in self.entries.iter().enumerate() {
-						let entry = &self.entries[row_index];
+						if entry.visible {
+							body.row(18.0, |mut row| {
 								row.col(|ui| {
 									ui.label(entry.filetype.icon());
 								});
 								row.col(|ui| {
-							if ui.button(&entry.name).clicked() {
+									let f = ui.button(&entry.name);
+									if f.clicked() {
 										to_open = Some(row_index);
 									}
+									// if f.has_focus() && ui.input(|i| i.key_pressed(Key::Delete)) {}
 								});
 							});
+						}
+					}
 					if let Some(row_index) = to_open {
 						self.open(row_index);
 					}
@@ -207,6 +226,7 @@ impl Entry {
 		};
 
 		Some(Self {
+			visible: true,
 			name,
 			path,
 			filetype,