diff --git a/main.pyw b/main.pyw
index c009e07..dd12ef6 100644
--- a/main.pyw
+++ b/main.pyw
@@ -13,14 +13,14 @@ class TestScene(Scene):
 
         # loading resource
 
-        normal_texture = pyglet.image.load("./assets/image/button/test_button_normal.png")
-        hover_texture = pyglet.image.load("./assets/image/button/test_button_hover.png")
-        click_texture = pyglet.image.load("./assets/image/button/test_button_clicking.png")
+        texture_normal = pyglet.image.load("./assets/image/button/test_button_normal.png")
+        texture_hover = pyglet.image.load("./assets/image/button/test_button_hover.png")
+        texture_click = pyglet.image.load("./assets/image/button/test_button_clicking.png")
 
         button_atlas = pyglet.image.atlas.TextureAtlas()
-        normal_region = button_atlas.add(normal_texture)
-        hover_region = button_atlas.add(hover_texture)
-        click_region = button_atlas.add(click_texture)
+        region_normal = button_atlas.add(texture_normal)
+        region_hover = button_atlas.add(texture_hover)
+        region_click = button_atlas.add(texture_click)
 
         self.background_batch = pyglet.graphics.Batch()
         self.label_batch = pyglet.graphics.Batch()
@@ -33,9 +33,9 @@ class TestScene(Scene):
 
             x=0.5, y=0.5, width=0.5, height=0.5,
 
-            texture_normal=normal_region,
-            texture_hover=hover_region,
-            texture_click=click_region,
+            texture_normal=region_normal,
+            texture_hover=region_hover,
+            texture_click=region_click,
 
             label_text="Hello World !",
 
@@ -51,8 +51,6 @@ class TestScene(Scene):
         self.label_batch.draw()
 
 
-
-
 # Create a new window
 window = Window(resizable=True, vsync=False)
 window.add_scene(TestScene)
diff --git a/source/gui/widget/Button.py b/source/gui/widget/Button.py
index d6f19a2..8baf391 100644
--- a/source/gui/widget/Button.py
+++ b/source/gui/widget/Button.py
@@ -38,15 +38,16 @@ class Button(BoxWidget):
 
         self.background = Sprite(
             img=self._texture_normal,
-            x=self.x, y=self.y, width=self.width, height=self.height,
             **dict_prefix("background_", kwargs)
         )
 
         self.label = pyglet.text.Label(
-            x=self.x, y=self.y, width=self.width, height=self.height,
+            anchor_x="center", anchor_y="center",
             **dict_prefix("label_", kwargs)
         )
 
+        self._refresh_size()  # refresh the size and position for the background and label
+
     # background
 
     @property
@@ -64,9 +65,20 @@ class Button(BoxWidget):
             self._texture_normal
         )
 
+    # refresh
+
     def _refresh_background(self) -> None:
         self.background.image = self.background_texture
 
+    def _refresh_size(self) -> None:
+        self.background.x = self.x
+        self.background.y = self.y
+        self.background.width = self.width
+        self.background.height = self.height
+
+        self.label.x = self.x + (self.width / 2)
+        self.label.y = self.y + (self.height / 2)
+
     @BoxWidget.hovering.setter
     def hovering(self, hovering: bool):
         # when the hover state is changed, update the background
@@ -82,15 +94,7 @@ class Button(BoxWidget):
     # event
 
     def on_resize(self, width: int, height: int):
-        self.background.x = self.x
-        self.background.y = self.y
-        self.background.width = self.width
-        self.background.height = self.height
-
-        self.label.x = self.x
-        self.label.y = self.y
-        self.label.width = self.width
-        self.label.height = self.height
+        self._refresh_size()
 
     def draw(self):
         """
diff --git a/source/gui/widget/Text.py b/source/gui/widget/Text.py
index 999f1e4..198b7a3 100644
--- a/source/gui/widget/Text.py
+++ b/source/gui/widget/Text.py
@@ -24,16 +24,20 @@ class Text(BoxWidget):
         super().__init__(scene, x, y, width, height)
 
         self.label = pyglet.text.Label(
-            x=self.x, y=self.y, width=self.width, height=self.height,
             *args, **kwargs
         )
 
-    def on_resize(self, width: int, height: int):
+        self._refresh_size()
+
+    def _refresh_size(self):
         self.label.x = self.x
         self.label.y = self.y
         self.label.width = self.width
         self.label.height = self.height
 
+    def on_resize(self, width: int, height: int):
+        self._refresh_size()
+
     def draw(self):
         """
         The draw function. Can be called to draw the widget, but can be ignored to draw it with batchs.
diff --git a/source/utils/dict.py b/source/utils/dict.py
index 2d58294..f97dde2 100644
--- a/source/utils/dict.py
+++ b/source/utils/dict.py
@@ -1,12 +1,19 @@
 from typing import Callable, Any
 
 
-def dict_filter(filter_func: Callable[[Any, Any], bool], dictionary: dict) -> dict:
+def dict_filter(filter_func: Callable[[Any, Any], bool], dictionary: dict[Any, Any]) -> dict[Any, Any]:
     """
     Filter a dict object with the filter function given.
     :filter_func: the function to filter with
     :dictionary: the dictionary to filter
     :return: the filtered dictionary
+
+    Example :
+    filter_func = lambda key, value: key.startswith("valeur")
+    dictionary = {"valeur1": 1, "valeur2": 2, "clé1": None}
+
+    result = {"valeur1": 1, "valeur2": 2}
+
     """
 
     return {
@@ -17,12 +24,18 @@ def dict_filter(filter_func: Callable[[Any, Any], bool], dictionary: dict) -> di
     }
 
 
-def dict_prefix(prefix: str, dictionary: dict) -> dict:
+def dict_prefix(prefix: str, dictionary: dict[str, Any]) -> dict[str, Any]:
     """
     Take only the keys that start with the prefix, and remove this prefix from the keys.
     :prefix: the prefix to use
     :dictionary: the dictionary to filter
     :return: the dictionary with the prefix
+
+    Example:
+    prefix = "button"
+    dictionary = {"button1": 1, "button2": 2, "label1": None}
+
+    result = {"1": 1, "2": 2}
     """
 
     return {