#72 add Clone

src/views/command.rs

@@ -12,7 +12,7 @@ pub struct Command<V, F> {
 impl<V, F> Command<V, F>
 where
     V: View,
-    F: Fn(&mut Context) + 'static,
+    F: Fn(&mut Context) + Clone + 'static,
 {
     pub fn new(v: V, name: String, key: Option<HotKey>, f: F) -> Self {
         Self {
@@ -27,7 +27,7 @@ where
 impl<V, F> View for Command<V, F>
 where
     V: View,
-    F: Fn(&mut Context) + 'static,
+    F: Fn(&mut Context) + Clone + 'static,
 {
     fn process(
         &self,
@@ -96,7 +96,7 @@ where
 impl<V, F> private::Sealed for Command<V, F>
 where
     V: View,
-    F: Fn(&mut Context) + 'static,
+    F: Fn(&mut Context) + Clone + 'static,
 {
 }
 

src/views/env.rs

@@ -12,7 +12,7 @@ impl<S, V, F> View for EnvView<S, V, F>
 where
     V: View,
     S: Clone + Default + 'static,
-    F: Fn(S, &mut Context) -> V + 'static,
+    F: Fn(S, &mut Context) -> V + Clone + 'static,
 {
     fn process(
         &self,
@@ -81,7 +81,7 @@ where
 impl<S, V, F> private::Sealed for EnvView<S, V, F> {}
 
 /// Reads from the environment.
-pub fn env<S: Clone + Default + 'static, V: View, F: Fn(S, &mut Context) -> V + 'static>(
+pub fn env<S: Clone + Default + 'static, V: View, F: Fn(S, &mut Context) -> V + Clone + 'static>(
     f: F,
 ) -> impl View {
     EnvView {

src/views/focus.rs

@@ -10,7 +10,7 @@ pub struct Focus<F> {
 impl<V, F> View for Focus<F>
 where
     V: View,
-    F: Fn(bool) -> V + 'static,
+    F: Fn(bool) -> V + Clone + 'static,
 {
     fn process(
         &self,
@@ -102,6 +102,6 @@ impl<F> private::Sealed for Focus<F> {}
 
 /// Calls calls a function with true if the view subtree returned
 /// by the function has the keyboard focus.
-pub fn focus<V: View, F: Fn(bool) -> V + 'static>(f: F) -> impl View {
+pub fn focus<V: View, F: Fn(bool) -> V + Clone + 'static>(f: F) -> impl View {
     Focus { func: f }
 }

src/views/geom.rs

@@ -11,7 +11,7 @@ pub struct Geom<V, F> {
 impl<V, F> View for Geom<V, F>
 where
     V: View,
-    F: Fn(&mut Context, LocalSize, LocalToWorld) + 'static,
+    F: Fn(&mut Context, LocalSize, LocalToWorld) + Clone + 'static,
 {
     fn process(
         &self,
@@ -93,7 +93,7 @@ impl<V, F> private::Sealed for Geom<V, F> {}
 impl<V, F> Geom<V, F>
 where
     V: View,
-    F: Fn(&mut Context, LocalSize, LocalToWorld) + 'static,
+    F: Fn(&mut Context, LocalSize, LocalToWorld) + Clone + 'static,
 {
     pub fn new(child: V, f: F) -> Self {
         Self { child, func: f }

src/views/handle.rs

@@ -13,7 +13,7 @@ pub struct Handle<V, F, A, A2> {
 impl<V, F, A, A2> Handle<V, F, A, A2>
 where
     V: View,
-    F: Fn(&mut Context, &A) -> A2 + 'static,
+    F: Fn(&mut Context, &A) -> A2 + Clone + 'static,
 {
     pub fn new(v: V, f: F) -> Self {
         Self {
@@ -28,7 +28,7 @@ where
 impl<V, F, A, A2> View for Handle<V, F, A, A2>
 where
     V: View,
-    F: Fn(&mut Context, &A) -> A2 + 'static,
+    F: Fn(&mut Context, &A) -> A2 + Clone + 'static,
     A: 'static,
     A2: 'static,
 {

src/views/key.rs

@@ -11,7 +11,7 @@ pub struct KeyView<V, F> {
 impl<V, F, A> KeyView<V, F>
 where
     V: View,
-    F: Fn(&mut Context, Key) -> A + 'static,
+    F: Fn(&mut Context, Key) -> A + Clone + 'static,
 {
     pub fn new(v: V, f: F) -> Self {
         KeyView { child: v, func: f }
@@ -21,7 +21,7 @@ where
 impl<V, F, A> View for KeyView<V, F>
 where
     V: View,
-    F: Fn(&mut Context, Key) -> A + 'static,
+    F: Fn(&mut Context, Key) -> A + Clone + 'static,
     A: 'static,
 {
     fn process(

src/views/list.rs

@@ -240,23 +240,23 @@ impl<ID, F> private::Sealed for List<ID, F> {}
 ///     ))
 /// }));
 /// ```
-pub fn list<ID: Hash, V: View, F: Fn(&ID) -> V + 'static>(ids: Vec<ID>, f: F) -> List<ID, F> {
+pub fn list<ID: Hash, V: View, F: Fn(&ID) -> V + Clone + 'static>(ids: Vec<ID>, f: F) -> List<ID, F> {
     List {
         orientation: ListOrientation::Vertical,
         ids,
         func: f,
     }
 }
 
-pub fn hlist<ID: Hash, V: View, F: Fn(&ID) -> V + 'static>(ids: Vec<ID>, f: F) -> List<ID, F> {
+pub fn hlist<ID: Hash, V: View, F: Fn(&ID) -> V + Clone + 'static>(ids: Vec<ID>, f: F) -> List<ID, F> {
     List {
         orientation: ListOrientation::Horizontal,
         ids,
         func: f,
     }
 }
 
-pub fn zlist<ID: Hash, V: View, F: Fn(&ID) -> V + 'static>(ids: Vec<ID>, f: F) -> List<ID, F> {
+pub fn zlist<ID: Hash, V: View, F: Fn(&ID) -> V + Clone + 'static>(ids: Vec<ID>, f: F) -> List<ID, F> {
     List {
         orientation: ListOrientation::Z,
         ids,