Implement styling for ProgressBar

style/src/lib.rs

@@ -1,5 +1,6 @@
 pub mod button;
 pub mod container;
+pub mod progress_bar;
 pub mod scrollable;
 pub mod slider;
 pub mod text_input;

style/src/progress_bar.rs

@@ -0,0 +1,42 @@
+//! Provide progress feedback to your users.
+use iced_core::{Background, Color};
+
+/// The appearance of a progress bar.
+#[derive(Debug)]
+pub struct Style {
+    pub background: Background,
+    pub bar: Background,
+    pub border_radius: u16,
+}
+
+/// A set of rules that dictate the style of a progress bar.
+pub trait StyleSheet {
+    fn style(&self) -> Style;
+}
+
+struct Default;
+
+impl StyleSheet for Default {
+    fn style(&self) -> Style {
+        Style {
+            background: Background::Color(Color::from_rgb(0.6, 0.6, 0.6)),
+            bar: Background::Color(Color::from_rgb(0.3, 0.9, 0.3)),
+            border_radius: 5,
+        }
+    }
+}
+
+impl std::default::Default for Box<dyn StyleSheet> {
+    fn default() -> Self {
+        Box::new(Default)
+    }
+}
+
+impl<T> From<T> for Box<dyn StyleSheet>
+where
+    T: 'static + StyleSheet,
+{
+    fn from(style: T) -> Self {
+        Box::new(style)
+    }
+}