update file dialog

Author: teh-cmc

crates/re_data_source/src/data_loader/loader_external.rs

@@ -44,7 +44,7 @@ pub static EXTERNAL_LOADER_PATHS: Lazy<Vec<std::path::PathBuf>> = Lazy::new(|| {
     executables.into_iter().collect()
 });
 
-/// Iterator over all registered [`DataLoader`]s.
+/// Iterator over all registered external [`DataLoader`]s.
 #[inline]
 pub fn iter_external_loaders() -> impl ExactSizeIterator<Item = std::path::PathBuf> {
     EXTERNAL_LOADER_PATHS.iter().cloned()

crates/re_ui/src/command.rs

@@ -86,7 +86,7 @@ impl UICommand {
                 "Save data for the current loop selection to a Rerun data file (.rrd)",
             ),
 
-            UICommand::Open => ("Open…", "Open a Rerun Data File (.rrd)"),
+            UICommand::Open => ("Open…", "Open any supported files (.rrd, images, meshes, …)"),
 
             UICommand::CloseCurrentRecording => (
                 "Close current Recording",

crates/re_viewer/src/app.rs

@@ -1269,18 +1269,28 @@ fn file_saver_progress_ui(egui_ctx: &egui::Context, background_tasks: &mut Backg
 #[cfg(not(target_arch = "wasm32"))]
 fn open_file_dialog_native() -> Vec<std::path::PathBuf> {
     re_tracing::profile_function!();
-    let supported: Vec<_> = re_data_source::SUPPORTED_RERUN_EXTENSIONS
-        .iter()
-        .chain(re_data_source::SUPPORTED_IMAGE_EXTENSIONS)
-        .chain(re_data_source::SUPPORTED_MESH_EXTENSIONS)
-        .chain(re_data_source::SUPPORTED_POINT_CLOUD_EXTENSIONS)
-        .chain(re_data_source::SUPPORTED_TEXT_EXTENSIONS)
-        .copied()
-        .collect();
-    rfd::FileDialog::new()
-        .add_filter("Supported files", &supported)
-        .pick_files()
-        .unwrap_or_default()
+
+    let supported: Vec<_> = if re_data_source::iter_external_loaders().len() == 0 {
+        re_data_source::SUPPORTED_RERUN_EXTENSIONS
+            .iter()
+            .chain(re_data_source::SUPPORTED_IMAGE_EXTENSIONS)
+            .chain(re_data_source::SUPPORTED_MESH_EXTENSIONS)
+            .chain(re_data_source::SUPPORTED_POINT_CLOUD_EXTENSIONS)
+            .chain(re_data_source::SUPPORTED_TEXT_EXTENSIONS)
+            .copied()
+            .collect()
+    } else {
+        vec![]
+    };
+
+    let mut dialog = rfd::FileDialog::new();
+
+    // If there's at least one external loader registered, then literally anything goes!
+    if !supported.is_empty() {
+        dialog = dialog.add_filter("Supported files", &supported);
+    }
+
+    dialog.pick_files().unwrap_or_default()
 }
 
 #[cfg(target_arch = "wasm32")]