diff --git a/ui/Cargo.toml b/ui/Cargo.toml
index 46bf689..e731166 100644
--- a/ui/Cargo.toml
+++ b/ui/Cargo.toml
@@ -10,12 +10,15 @@ serde = { version = "1.0.203", features = ["derive"] }
 serde_json = { version = "1.0.120" }
 paste = "1.0.15"
 anyhow = { version = "1.0.86", features = ["backtrace"] }
+itertools = "0.14.0"
 
 vulkan-rs = { git = "https://gavania.de/hodasemi/vulkan_lib.git" }
 utilities = { git = "https://gavania.de/hodasemi/utilities.git" }
 assetpath = { git = "https://gavania.de/hodasemi/vulkan_lib.git" }
 ecs = { git = "https://gavania.de/hodasemi/ecs.git" }
 
+ui_proc_macro = { path = "../ui_proc_macro" }
+
 # optional
 audio = { git = "https://gavania.de/hodasemi/audio.git", optional = true }
 
diff --git a/ui/src/builder/builder.rs b/ui/src/builder/builder.rs
index 745af22..50b1871 100644
--- a/ui/src/builder/builder.rs
+++ b/ui/src/builder/builder.rs
@@ -203,7 +203,8 @@ impl Functionality for GuiBuilder {
             let suffix_less_function_name = handle_function_suffix(function_name);
 
             let button: Arc<Button> = self.element(&suffix_less_function_name)?;
-            button.set_callback(callback);
+            todo!()
+            // button.set_callback(callback);
         }
 
         Ok(())
diff --git a/ui/src/builder/snippet.rs b/ui/src/builder/snippet.rs
index 39717f8..b3866be 100644
--- a/ui/src/builder/snippet.rs
+++ b/ui/src/builder/snippet.rs
@@ -181,7 +181,8 @@ impl Functionality for GuiSnippet {
             let suffix_less_function_name = handle_function_suffix(function_name);
 
             let button: Arc<Button> = self.element(&suffix_less_function_name)?;
-            button.set_callback(callback);
+            todo!()
+            // button.set_callback(callback);
         }
 
         Ok(())
diff --git a/ui/src/elements/button.rs b/ui/src/elements/button.rs
index 1760bbe..a140103 100644
--- a/ui/src/elements/button.rs
+++ b/ui/src/elements/button.rs
@@ -271,9 +271,9 @@ pub struct Button {
     #[cfg(feature = "audio")]
     _hover_sound: Option<Arc<Audible>>,
 
-    click_executable: Arc<Executable<()>>,
-    select_executable: Arc<Executable<bool>>,
-    on_select_executable: Arc<Executable<bool>>,
+    pub(crate) click_executable: Arc<Executable<()>>,
+    pub(crate) select_executable: Arc<Executable<bool>>,
+    pub(crate) on_select_executable: Arc<Executable<bool>>,
 
     normal: FillType,
     selected: FillType,
@@ -313,26 +313,23 @@ impl Button {
         self.selectable.select(gui_handler)
     }
 
-    pub fn set_callback<F>(&self, callback: F)
-    where
-        F: Fn(&mut Commands, &mut GuiHandler) -> Result<()> + Send + Sync + 'static,
-    {
-        self.click_executable.set_callback(
-            move |commands: &mut Commands, gui_handler: &mut GuiHandler, _: ()| {
-                callback(commands, gui_handler)
-            },
-        );
-    }
+    // pub fn set_callback<F>(&self, callback: F)
+    // where
+    //     F: Fn(&mut Commands, &mut GuiHandler) -> Result<()> + Send + Sync + 'static,
+    // {
+    //     self.click_executable.set_callback(
+    //         move |commands: &mut Commands, gui_handler: &mut GuiHandler, _: ()| {
+    //             callback(commands, gui_handler)
+    //         },
+    //     );
+    // }
 
     pub fn set_select_callback<F>(&self, callback: F)
     where
         F: Fn(&mut Commands, &mut GuiHandler, bool) -> Result<()> + Send + Sync + 'static,
     {
-        self.on_select_executable.set_callback(
-            move |commands: &mut Commands, gui_handler: &mut GuiHandler, select: bool| {
-                callback(commands, gui_handler, select)
-            },
-        );
+        todo!()
+        // self.on_select_executable.set_callback(callback);
     }
 
     pub fn set_custom_callback<F>(&self, callback: F)
@@ -593,18 +590,20 @@ impl Button {
     fn create_selected_changed_callback(button: Arc<Button>) {
         let button_weak = Arc::downgrade(&button);
 
-        let selected_changed =
-            move |_commands: &mut Commands, gui_handler: &mut GuiHandler, selected: bool| {
-                if let Some(button) = button_weak.upgrade() {
-                    if selected {
-                        button.set_button_state(gui_handler, ButtonState::Selected)?;
-                    } else {
-                        button.set_button_state(gui_handler, ButtonState::Normal)?;
-                    }
+        let selected_changed = move |_world: &mut World,
+                                     _commands: &mut Commands,
+                                     gui_handler: &mut GuiHandler,
+                                     selected: bool| {
+            if let Some(button) = button_weak.upgrade() {
+                if selected {
+                    button.set_button_state(gui_handler, ButtonState::Selected)?;
+                } else {
+                    button.set_button_state(gui_handler, ButtonState::Normal)?;
                 }
+            }
 
-                Ok(())
-            };
+            Ok(())
+        };
 
         button.select_executable.set_callback(selected_changed);
     }
diff --git a/ui/src/elements/callback_impl.rs b/ui/src/elements/callback_impl.rs
new file mode 100644
index 0000000..3d3f27c
--- /dev/null
+++ b/ui/src/elements/callback_impl.rs
@@ -0,0 +1,22 @@
+use anyhow::Result;
+use ecs::{resources::Resource as ResourceTrait, *};
+use itertools::Itertools;
+use ui_proc_macro::implement_callbacks;
+
+use crate::prelude::*;
+
+use std::marker::PhantomData;
+
+pub trait SetCallback<T, R, Func, Filter> {
+    fn set_callback(&self, func: Func);
+}
+
+pub trait SetSelectCallback<T, R, Func, Filter> {
+    fn set_select_callback(&self, func: Func);
+}
+
+pub trait SetCustomCallback<T, R, Func, Filter> {
+    fn set_custom_callback(&self, func: Func);
+}
+
+implement_callbacks!(2, 0);
diff --git a/ui/src/elements/mod.rs b/ui/src/elements/mod.rs
index 4393d69..9f6f0e2 100644
--- a/ui/src/elements/mod.rs
+++ b/ui/src/elements/mod.rs
@@ -18,6 +18,7 @@ pub mod ui_element;
 pub mod traits;
 
 mod callback_builder;
+pub mod callback_impl;
 pub mod prelude;
 mod wrapper;
 
diff --git a/ui/src/elements/multi_line_textfield.rs b/ui/src/elements/multi_line_textfield.rs
index 0d314a6..010d6ee 100644
--- a/ui/src/elements/multi_line_textfield.rs
+++ b/ui/src/elements/multi_line_textfield.rs
@@ -101,7 +101,10 @@ impl MultiLineTextFieldBuilder {
         multi_line_text_field.text_changed_exec.set_callback({
             let weak_tf = Arc::downgrade(&multi_line_text_field);
 
-            move |_commands: &mut Commands, gui_handler: &mut GuiHandler, _text| {
+            move |_world: &mut World,
+                  _commands: &mut Commands,
+                  gui_handler: &mut GuiHandler,
+                  _text| {
                 if let Some(tf) = weak_tf.upgrade() {
                     tf.update_text(gui_handler)?;
                 }
diff --git a/ui/src/elements/textfield.rs b/ui/src/elements/textfield.rs
index 448adc4..29ee757 100644
--- a/ui/src/elements/textfield.rs
+++ b/ui/src/elements/textfield.rs
@@ -172,7 +172,8 @@ impl TextField {
     where
         F: Fn(&mut Commands, &mut GuiHandler, Option<String>) -> Result<()> + Send + Sync + 'static,
     {
-        self.text_changed_executable.set_callback(f);
+        todo!()
+        // self.text_changed_executable.set_callback(f);
     }
 
     pub fn set_text_color(&self, gui_handler: &mut GuiHandler, text_color: Color) -> Result<()> {
diff --git a/ui/src/gui_handler/gui/executable.rs b/ui/src/gui_handler/gui/executable.rs
index a21573c..31ed035 100644
--- a/ui/src/gui_handler/gui/executable.rs
+++ b/ui/src/gui_handler/gui/executable.rs
@@ -9,8 +9,11 @@ use crate::prelude::*;
 
 /// `Executable` holds a closure which can be executed
 pub struct Executable<I: Send + Sync> {
-    callback:
-        RwLock<Option<Arc<dyn Fn(&mut Commands, &mut GuiHandler, I) -> Result<()> + Send + Sync>>>,
+    callback: RwLock<
+        Option<
+            Arc<dyn Fn(&mut World, &mut Commands, &mut GuiHandler, I) -> Result<()> + Send + Sync>,
+        >,
+    >,
 }
 
 impl<I: Send + Sync + 'static> Executable<I> {
@@ -28,7 +31,7 @@ impl<I: Send + Sync + 'static> Executable<I> {
     /// * `callback` is a `Option<Callback>` closure
     pub fn set_callback<F>(&self, callback: impl Into<Option<F>>)
     where
-        F: Fn(&mut Commands, &mut GuiHandler, I) -> Result<()> + Send + Sync + 'static,
+        F: Fn(&mut World, &mut Commands, &mut GuiHandler, I) -> Result<()> + Send + Sync + 'static,
     {
         let mut function = self.callback.write().unwrap();
 
@@ -43,8 +46,8 @@ impl<I: Send + Sync + 'static> Executable<I> {
         if let Some(callback) = self.callback.read().unwrap().as_ref() {
             let callback = callback.clone();
 
-            gui_handler.add_callback(move |commands, gui_handler| {
-                (callback)(commands, gui_handler, input)
+            gui_handler.add_callback(move |world, commands, gui_handler| {
+                (callback)(world, commands, gui_handler, input)
             });
         }
 
diff --git a/ui/src/gui_handler/gui_handler.rs b/ui/src/gui_handler/gui_handler.rs
index e0bd334..d533d13 100644
--- a/ui/src/gui_handler/gui_handler.rs
+++ b/ui/src/gui_handler/gui_handler.rs
@@ -245,7 +245,9 @@ pub struct GuiHandler {
 
     text_sample_count: VkSampleCountFlags,
 
-    callback_list: Vec<Box<dyn FnOnce(&mut Commands, &mut GuiHandler) -> Result<()> + Send + Sync>>,
+    callback_list: Vec<
+        Box<dyn FnOnce(&mut World, &mut Commands, &mut GuiHandler) -> Result<()> + Send + Sync>,
+    >,
 }
 
 impl GuiHandler {
@@ -927,7 +929,7 @@ impl GuiHandler {
     }
 
     pub(crate) fn add_callback<
-        F: FnOnce(&mut Commands, &mut GuiHandler) -> Result<()> + Send + Sync + 'static,
+        F: FnOnce(&mut World, &mut Commands, &mut GuiHandler) -> Result<()> + Send + Sync + 'static,
     >(
         &mut self,
         f: F,
@@ -935,12 +937,17 @@ impl GuiHandler {
         self.callback_list.push(Box::new(f));
     }
 
-    pub fn process_callbacks(&mut self, commands: &mut Commands) -> Result<()> {
+    pub fn process_callbacks(&mut self, world: &mut World) -> Result<()> {
         let callbacks = mem::take(&mut self.callback_list);
+        let mut commands = Commands::new(world.now());
 
         callbacks
             .into_iter()
-            .try_for_each(|callback| callback(commands, self))
+            .try_for_each(|callback| callback(world, &mut commands, self))?;
+
+        commands.apply_deferred(world);
+
+        Ok(())
     }
 
     fn render(
diff --git a/ui/src/keyboard/mod.rs b/ui/src/keyboard/mod.rs
index 89aa016..7ab36c7 100644
--- a/ui/src/keyboard/mod.rs
+++ b/ui/src/keyboard/mod.rs
@@ -376,19 +376,20 @@ impl Keyboard {
         let weak_textfield = Arc::downgrade(&textfield);
         let weak_button = Arc::downgrade(&button_ref);
 
-        button_ref.set_callback(Box::new(
-            move |_commands: &mut Commands, gui_handler: &mut GuiHandler| {
-                if let Some(textfield) = weak_textfield.upgrade() {
-                    if let Some(button) = weak_button.upgrade() {
-                        if let Some(text) = button.text()? {
-                            textfield.add_letter(gui_handler, text.as_bytes()[0] as char)?;
-                        }
-                    }
-                }
+        todo!();
+        // button_ref.set_callback(Box::new(
+        //     move |_world: &mut World, _commands: &mut Commands, gui_handler: &mut GuiHandler| {
+        //         if let Some(textfield) = weak_textfield.upgrade() {
+        //             if let Some(button) = weak_button.upgrade() {
+        //                 if let Some(text) = button.text()? {
+        //                     textfield.add_letter(gui_handler, text.as_bytes()[0] as char)?;
+        //                 }
+        //             }
+        //         }
 
-                Ok(())
-            },
-        ));
+        //         Ok(())
+        //     },
+        // ));
 
         Ok(())
     }
diff --git a/ui_proc_macro/src/lib.rs b/ui_proc_macro/src/lib.rs
index 18adf4d..d475fa4 100644
--- a/ui_proc_macro/src/lib.rs
+++ b/ui_proc_macro/src/lib.rs
@@ -3,9 +3,8 @@ mod update;
 use update::update;
 
 use proc_macro::TokenStream;
-use quote::quote;
 use syn::{
-    DeriveInput, LitInt, Result,
+    LitInt, Result,
     parse::{Parse, ParseStream},
     parse_macro_input,
     token::Comma,
@@ -30,7 +29,7 @@ impl Parse for UpdateInfo {
 }
 
 #[proc_macro]
-pub fn implement_updates(input: TokenStream) -> TokenStream {
+pub fn implement_callbacks(input: TokenStream) -> TokenStream {
     let input = parse_macro_input!(input as UpdateInfo);
 
     update(input.max_components, input.max_resources)
diff --git a/ui_proc_macro/src/update.rs b/ui_proc_macro/src/update.rs
index c8b5660..65389eb 100644
--- a/ui_proc_macro/src/update.rs
+++ b/ui_proc_macro/src/update.rs
@@ -1,4 +1,6 @@
+use proc_macro::TokenStream;
 use proc_macro2::TokenStream as TokenStream2;
+use quote::quote;
 use update_macro_base::*;
 
 fn resource_only_events_and_systems(update: &Update) -> TokenStream2 {
@@ -11,7 +13,7 @@ fn resource_only_events_and_systems(update: &Update) -> TokenStream2 {
     let resource_store = &resource_tokens.resource_store;
     let resource_idents = &resource_tokens.resource_idents;
 
-    todo!()
+    quote! {}
 }
 
 fn events_and_systems(update: &Update) -> TokenStream2 {
@@ -40,29 +42,77 @@ fn events_and_systems(update: &Update) -> TokenStream2 {
     let resource_store = &resource_tokens.resource_store;
     let resource_idents = &resource_tokens.resource_idents;
 
-    todo!()
+    quote! {
+        impl<Func, #filter_type_impls #query_type_impls #resource_type_impls> SetCallback<#query_types, #resource_types, Func, #filter_types> for Button
+        where
+            Func: Fn(&mut Commands, &mut GuiHandler, #( #queries, )* #resources ) -> Result<()> + Send + Sync + 'static,
+            #filter_requirements
+            #component_requirements
+            #resource_requirement
+        {
+            fn set_callback(&self, func: Func) {
+                #( #verify_dedup )*
+
+                self.click_executable.set_callback(
+                    move |world: &mut World, commands: &mut Commands, gui_handler: &mut GuiHandler, _: ()| -> Result<()> {
+                        let mut complying_entities: Vec<Vec<&EntityObject>> = vec![Vec::new(); #query_count];
+
+                        for entity in unsafe { utilities::prelude::remove_life_time(world).entities() } {
+                            let mut comply_queries = Vec::new();
+
+                            #( #check_entities )*
+
+                            if !comply_queries.is_empty() {
+                                comply_queries
+                                    .into_iter()
+                                    .for_each(|q| complying_entities[q].push(entity));
+                            }
+                        }
+
+                        // check if one of the queries could not be fullfilled
+                        for queryable_entities in complying_entities.iter() {
+                            if queryable_entities.is_empty() {
+                                return Ok(());
+                            }
+                        }
+
+                        #resource_store
+
+                        for entities in complying_entities.into_iter().multi_cartesian_product() {
+                            #( #component_stores )*
+                            #( #query_structs )*
+
+                            func(commands, gui_handler, #( #query_idents, )* #( #resource_idents, )*)?;
+                        }
+
+                        Ok(())
+                    }
+                )
+            }
+        }
+    }
 }
 
-fn update(max_components: usize, max_resources: usize) -> TokenStream2 {
+pub fn update(max_components: usize, max_resources: usize) -> TokenStream {
     let mut queries: Vec<Vec<usize>> = Vec::new();
 
     for c in Update::MIN_COMPONENTS..=max_components {
         queries.push(vec![c]);
     }
 
-    for x in Update::MIN_COMPONENTS..=max_components {
-        for y in Update::MIN_COMPONENTS..=max_components {
-            queries.push(vec![x, y]);
-        }
-    }
+    // for x in Update::MIN_COMPONENTS..=max_components {
+    //     for y in Update::MIN_COMPONENTS..=max_components {
+    //         queries.push(vec![x, y]);
+    //     }
+    // }
 
-    for x in Update::MIN_COMPONENTS..=max_components {
-        for y in Update::MIN_COMPONENTS..=max_components {
-            for z in Update::MIN_COMPONENTS..=max_components {
-                queries.push(vec![x, y, z]);
-            }
-        }
-    }
+    // for x in Update::MIN_COMPONENTS..=max_components {
+    //     for y in Update::MIN_COMPONENTS..=max_components {
+    //         for z in Update::MIN_COMPONENTS..=max_components {
+    //             queries.push(vec![x, y, z]);
+    //         }
+    //     }
+    // }
 
     let mut resources = Vec::new();
 
@@ -90,16 +140,18 @@ fn update(max_components: usize, max_resources: usize) -> TokenStream2 {
         events.push(q);
     }
 
-    // updates.push(Update::new(vec![1].into_iter(), 0));
+    // updates.push(events_and_systems(&Update::new(vec![2].into_iter(), 0)));
 
     // let q = quote! {
     //     #( #updates )*
     // };
 
-    // panic!("{q}");
-
-    TokenStream::from(quote! {
+    let q = quote! {
         #( #updates )*
         #( #events )*
-    })
+    };
+
+    panic!("{q}");
+
+    TokenStream::from(q)
 }