Add helper functions for alignment to widget module

examples/tour/src/main.rs

@@ -1,6 +1,6 @@
 use iced::widget::{
-    button, checkbox, column, container, horizontal_space, image, radio, row,
-    scrollable, slider, text, text_input, toggler, vertical_space,
+    button, center_x, center_y, checkbox, column, horizontal_space, image,
+    radio, row, scrollable, slider, text, text_input, toggler, vertical_space,
 };
 use iced::widget::{Button, Column, Container, Slider};
 use iced::{Center, Color, Element, Fill, Font, Pixels};
@@ -166,16 +166,13 @@ impl Tour {
             .padding(20)
             .into();
 
-        let scrollable = scrollable(
-            container(if self.debug {
-                content.explain(Color::BLACK)
-            } else {
-                content
-            })
-            .center_x(Fill),
-        );
+        let scrollable = scrollable(center_x(if self.debug {
+            content.explain(Color::BLACK)
+        } else {
+            content
+        }));
 
-        container(scrollable).center_y(Fill).into()
+        center_y(scrollable).into()
     }
 
     fn can_continue(&self) -> bool {
@@ -543,7 +540,7 @@ fn ferris<'a>(
     width: u16,
     filter_method: image::FilterMethod,
 ) -> Container<'a, Message> {
-    container(
+    center_x(
         // This should go away once we unify resource loading on native
         // platforms
         if cfg!(target_arch = "wasm32") {
@@ -554,7 +551,6 @@ fn ferris<'a>(
         .filter_method(filter_method)
         .width(width),
     )
-    .center_x(Fill)
 }
 
 fn padded_button<Message: Clone>(label: &str) -> Button<'_, Message> {