new_handler function

src/event.rs

@@ -1,4 +1,4 @@
-use crate::{key::Key, Element};
+use crate::{arc, key::Key, Element};
 
 /// Enum defining commands that can be issued by an `Element`.
 #[derive(Clone)]
@@ -89,3 +89,47 @@ pub enum Event {
 /// - &mut T: The element,
 /// - &mut EventResponse: The event response
 pub type Handler<T> = std::sync::Arc<std::sync::Mutex<dyn FnMut(&mut T, &mut EventResponse)>>;
+
+/// Creates a new `Handler<T>` from a given function closure.
+///
+/// This function takes a closure and wraps it in an `Arc<Mutex<dyn FnMut>>`, allowing it to be
+/// used as a thread-safe, mutable handler that can be shared across threads. The handler function
+/// receives a mutable reference to a `T` type and a mutable reference to an `EventResponse`, allowing
+/// it to mutate both the state and response.
+///
+/// # Type Parameters
+///
+/// - `T`: The type of the data that the handler will operate on.
+/// - `F`: The type of the handler function, which must implement `FnMut(&mut T, &mut EventResponse) + 'static`.
+///
+/// # Parameters
+///
+/// - `handler_fn`: The closure or function that will serve as the handler, taking mutable references
+///   to both the `T` data and an `EventResponse`.
+///
+/// # Returns
+///
+/// Returns a `Handler<T>`, which is an `Arc<Mutex<dyn FnMut(&mut T, &mut EventResponse)>>`.
+///
+/// This type alias makes it easy to manage the handler in a multi-threaded context, allowing shared ownership
+/// with safe, mutable access to the underlying function.
+///
+/// # Examples
+///
+/// ```rust
+/// use osui::ui::button;
+/// rsx! {
+///     button {
+///         // Create a new handler and assign it to on_click
+///         on_click: new_handler(move |btn: &mut Button, _response| {
+///             btn.text = "Clicked".to_string();
+///         }
+///     ), "click me" }
+/// }
+/// ```
+pub fn new_handler<T, F>(handler_fn: F) -> Handler<T>
+where
+    F: FnMut(&mut T, &mut EventResponse) + 'static,
+{
+    arc!(handler_fn)
+}

src/test/mod.rs

@@ -1,14 +1,9 @@
-use crate::{self as osui, arc, rsx, rsx_elem, ui::*, Element, EventResponse};
+use crate::{self as osui, event::new_handler, rsx, ui::*, Element};
 
 pub fn app() -> Box<dyn Element> {
-    let mut something = String::from("!");
     rsx! {
-        button { on_click: arc!(move |_btn: &mut Button, response: &mut EventResponse| {
-            something += "!";
-            response.update_element_by_id("my_id", rsx_elem! {
-                text { id: "my_id", y: 2, "{something}" }
-            });
-        }), style.clicked_background: Color::Green, style.hover_background: Color::Magenta, "click me" }
-        text { id: "my_id", y: 2, "!" }
+        button { on_click: new_handler(move |btn: &mut Button, _response| {
+            btn.text = "Clicked".to_string();
+        }), "click me" }
     }
 }

src/ui/elements.rs

@@ -5,7 +5,7 @@ use std::{
 
 use crate::{
     command, create_frame, element,
-    event::{Command, Event, Handler},
+    event::{Command, Event, Handler, },
     execute_response,
     key::Key,
     render_to_frame,