going to just use the ol update and click routine

src/button.rs

@@ -36,8 +36,8 @@ impl<'s> Button<'s> {
         self.text.set_position(position);
     }
 
-    pub fn set_callback(&mut self, callback: &'s FnMut(i32)){
-        self.callback = Some(callback);
+    pub fn is_within(point: Vector2f, button: &Button) -> bool {
+        button.body.local_bounds().contains(point)
     }
 }