Use BoxableView trait bound

src/cursive.rs

@@ -9,7 +9,7 @@ use std::path::Path;
 use std::sync::mpsc;
 use theme;
 use vec::Vec2;
-use view::{self, AnyView, Finder, Position, View};
+use view::{self, AnyView, BoxableView, Finder, Position, View};
 use views::{self, LayerPosition};
 
 /// Identifies a screen in the cursive root.
@@ -454,7 +454,10 @@ impl Cursive {
     /// siv.add_layer(views::TextView::new("Hello world!"));
     /// # }
     /// ```
-    pub fn add_layer<T: 'static + View>(&mut self, view: T) {
+    pub fn add_layer<T>(&mut self, view: T)
+    where
+        T: BoxableView,
+    {
         self.screen_mut().add_layer(view);
     }
 
@@ -463,7 +466,7 @@ impl Cursive {
     /// Fullscreen layers have no shadow.
     pub fn add_fullscreen_layer<T>(&mut self, view: T)
     where
-        T: 'static + View,
+        T: BoxableView,
     {
         self.screen_mut().add_fullscreen_layer(view);
     }

src/views/any_box.rs

@@ -1,5 +1,5 @@
 use std::ops::{Deref, DerefMut};
-use view::{AnyView, View, ViewWrapper};
+use view::{AnyView, BoxableView, ViewWrapper};
 
 /// A boxed `AnyView`.
 pub struct AnyBox {
@@ -13,8 +13,8 @@ impl AnyBox {
     }
 
     /// Box the given view
-    pub fn boxed<T: View>(view: T) -> Self {
+    pub fn boxed<T: BoxableView>(view: T) -> Self {
-        AnyBox::new(Box::new(view))
+        AnyBox::new(view.as_boxed_view())
     }
 
     /// Returns the inner boxed view.

src/views/stack_view.rs

@@ -7,7 +7,8 @@ use std::cell;
 use std::ops::Deref;
 use theme::ColorStyle;
 use vec::Vec2;
-use view::{AnyView, Offset, Position, Selector, View, ViewWrapper};
+use view::{AnyView, BoxableView, Offset, Position, Selector, View,
+           ViewWrapper};
 use views::{AnyBox, Layer, ShadowView};
 
 /// Simple stack of views.
@@ -180,7 +181,7 @@ impl StackView {
     /// Fullscreen layers have no shadow.
     pub fn add_fullscreen_layer<T>(&mut self, view: T)
     where
-        T: 'static + View,
+        T: BoxableView,
     {
         let boxed = AnyBox::boxed(view);
         self.layers.push(Child {
@@ -194,7 +195,7 @@ impl StackView {
     /// Adds new view on top of the stack in the center of the screen.
     pub fn add_layer<T>(&mut self, view: T)
     where
-        T: 'static + View,
+        T: BoxableView,
     {
         self.add_layer_at(Position::center(), view);
     }
@@ -204,7 +205,7 @@ impl StackView {
     /// Chainable variant.
     pub fn layer<T>(self, view: T) -> Self
     where
-        T: 'static + View,
+        T: BoxableView,
     {
         self.with(|s| s.add_layer(view))
     }
@@ -265,7 +266,7 @@ impl StackView {
     /// Chainable variant.
     pub fn fullscreen_layer<T>(self, view: T) -> Self
     where
-        T: 'static + View,
+        T: BoxableView,
     {
         self.with(|s| s.add_fullscreen_layer(view))
     }
@@ -273,7 +274,7 @@ impl StackView {
     /// Adds a view on top of the stack.
     pub fn add_layer_at<T>(&mut self, position: Position, view: T)
     where
-        T: 'static + View,
+        T: BoxableView,
     {
         let boxed = AnyBox::boxed(view);
         self.layers.push(Child {
@@ -294,7 +295,7 @@ impl StackView {
     /// Chainable variant.
     pub fn layer_at<T>(self, position: Position, view: T) -> Self
     where
-        T: 'static + View,
+        T: BoxableView,
     {
         self.with(|s| s.add_layer_at(position, view))
     }