Introduce state lifetime for style_sheet in ProgressBar

native/src/widget/progress_bar.rs

@@ -21,15 +21,15 @@ pub use iced_style::progress_bar::{Style, StyleSheet};
 ///
 /// ![Progress bar drawn with `iced_wgpu`](https://user-images.githubusercontent.com/18618951/71662391-a316c200-2d51-11ea-9cef-52758cab85e3.png)
 #[allow(missing_debug_implementations)]
-pub struct ProgressBar {
+pub struct ProgressBar<'a> {
     range: RangeInclusive<f32>,
     value: f32,
     width: Length,
     height: Option<Length>,
-    style_sheet: Box<dyn StyleSheet>,
+    style_sheet: Box<dyn StyleSheet + 'a>,
 }
 
-impl ProgressBar {
+impl<'a> ProgressBar<'a> {
     /// The default height of a [`ProgressBar`].
     pub const DEFAULT_HEIGHT: u16 = 30;
 
@@ -63,14 +63,14 @@ impl ProgressBar {
     /// Sets the style of the [`ProgressBar`].
     pub fn style(
         mut self,
-        style_sheet: impl Into<Box<dyn StyleSheet>>,
+        style_sheet: impl Into<Box<dyn StyleSheet + 'a>>,
     ) -> Self {
         self.style_sheet = style_sheet.into();
         self
     }
 }
 
-impl<Message, Renderer> Widget<Message, Renderer> for ProgressBar
+impl<'a, Message, Renderer> Widget<Message, Renderer> for ProgressBar<'a>
 where
     Renderer: crate::Renderer,
 {
@@ -147,12 +147,13 @@ where
     }
 }
 
-impl<'a, Message, Renderer> From<ProgressBar> for Element<'a, Message, Renderer>
+impl<'a, Message, Renderer> From<ProgressBar<'a>>
+    for Element<'a, Message, Renderer>
 where
     Renderer: 'a + crate::Renderer,
     Message: 'a,
 {
-    fn from(progress_bar: ProgressBar) -> Element<'a, Message, Renderer> {
+    fn from(progress_bar: ProgressBar<'a>) -> Element<'a, Message, Renderer> {
         Element::new(progress_bar)
     }
 }

style/src/progress_bar.rs

@@ -32,9 +32,9 @@ impl std::default::Default for Box<dyn StyleSheet> {
     }
 }
 
-impl<T> From<T> for Box<dyn StyleSheet>
+impl<'a, T> From<T> for Box<dyn StyleSheet + 'a>
 where
-    T: 'static + StyleSheet,
+    T: 'a + StyleSheet,
 {
     fn from(style: T) -> Self {
         Box::new(style)

web/src/widget/progress_bar.rs

@@ -18,15 +18,15 @@ use std::ops::RangeInclusive;
 ///
 /// ![Progress bar](https://user-images.githubusercontent.com/18618951/71662391-a316c200-2d51-11ea-9cef-52758cab85e3.png)
 #[allow(missing_debug_implementations)]
-pub struct ProgressBar {
+pub struct ProgressBar<'a> {
     range: RangeInclusive<f32>,
     value: f32,
     width: Length,
     height: Option<Length>,
-    style: Box<dyn StyleSheet>,
+    style: Box<dyn StyleSheet + 'a>,
 }
 
-impl ProgressBar {
+impl<'a> ProgressBar<'a> {
     /// Creates a new [`ProgressBar`].
     ///
     /// It expects:
@@ -61,7 +61,7 @@ impl ProgressBar {
     }
 }
 
-impl<Message> Widget<Message> for ProgressBar {
+impl<'a, Message> Widget<Message> for ProgressBar<'a> {
     fn node<'b>(
         &self,
         bump: &'b bumpalo::Bump,
@@ -106,11 +106,11 @@ impl<Message> Widget<Message> for ProgressBar {
     }
 }
 
-impl<'a, Message> From<ProgressBar> for Element<'a, Message>
+impl<'a, Message> From<ProgressBar<'a>> for Element<'a, Message>
 where
     Message: 'static,
 {
-    fn from(container: ProgressBar) -> Element<'a, Message> {
+    fn from(container: ProgressBar<'a>) -> Element<'a, Message> {
         Element::new(container)
     }
 }