lucid coral
When I call tauri::api::dialog::blocking::FileDialogBuilder::new().pick_folder() in a menu handler, it blocks the main thread, but doesn't show the dialog itself.
I was assuming the behaviour would be something like: show OS file picker, block everything else until a folder is picked, once it's picked, return and continue the rest.
Am I misunderstanding something? Any help would be appreciated.
celest crag
The menu event handler runs on the main thread, so the NOTE from https://docs.rs/tauri/latest/tauri/api/dialog/blocking/index.html unfortunately applies here as well.
lucid coral
Ah OK, I see. Thank you, that makes sense. If I need the behaviour I mention, where until the folder is picked, the function doesn't return, would I need to make an async fn? I have not ever touched that side of Rust and am worried it's a whole can of worms.
Maybe to explain in more detail: I have a command that I want to be fallible, and needs to be checked on the Frontend to have succeeded (i.e. with try {await invoke(...)} catch (e) { console.log("oh no") }), so the signature is something like
use tauri::api::dialog::blocking::FileDialogBuilder as Dialog;
#[tauri::command]
pub fn open_folder_and_do_something() -> Result<(), String> {
let path = Dialog::new().pick_folder().ok_or("no folder picked")?;
some_other_result_fn(&path)?; // if this isn't Ok, the frontend has to know
Ok(())
}
I want to be able to call the same command from a menu handler. I don't know what's the recommended / standard approach for something like this. I assume it's a frequently encountered need.
Since the command is fallible, I cannot easily use the non-blocking picker, as there's no way to find out if some_other_result_fn is Ok, as it would only be called and returned from in the pick_folder(|path| {some_other_result_fn(path)}) closure.
celest crag
So basically 2 options here, both are conceptually the same:
std::thread::spawn in on_menu_event and call the command in theretauri::async_runtime::spawn to call the commandthe async task is a bit lighter but i don't think it really matters.
lucid coral
OK thank you for the advice! Will attempt the async command approach.