Add View::focus_view

src/lib.rs

@@ -392,6 +392,8 @@ impl Cursive {
         self.screen_mut().find(sel)
     }
 
+    /// Tries to find the view identified by the given id.
+    ///
     /// Convenient method to use `find` with a `view::Selector::Id`.
     ///
     /// # Examples
@@ -417,6 +419,18 @@ impl Cursive {
         self.find(&view::Selector::Id(id))
     }
 
+    /// Moves the focus to the view identified by `id`.
+    ///
+    /// Convenient method to call `focus` with a `view::Selector::Id`.
+    pub fn focus_id(&mut self, id: &str) -> Result<(), ()> {
+        self.focus(&view::Selector::Id(id))
+    }
+
+    /// Moves the focus to the view identified by `sel`.
+    pub fn focus(&mut self, sel: &view::Selector) -> Result<(), ()> {
+        self.screen_mut().focus_view(sel)
+    }
+
     /// Adds a global callback.
     ///
     /// Will be triggered on the given key press when no view catches it.

src/view/mod.rs

@@ -113,7 +113,7 @@ pub trait View {
     /// Draws the view with the given printer (includes bounds) and focus.
     fn draw(&self, printer: &Printer);
 
-    /// Finds the view pointed to by the given path.
+    /// Finds the view identified by the given selector.
     ///
     /// See [`Finder::find`] for a nicer interface, implemented for all views.
     ///
@@ -126,6 +126,13 @@ pub trait View {
         None
     }
 
+    /// Moves the focus to the view identified by the given selector.
+    ///
+    /// Returns `Ok(())` if the view was found and selected.
+    fn focus_view(&mut self, &Selector) -> Result<(), ()> {
+        Err(())
+    }
+
     /// This view is offered focus. Will it take it?
     ///
     /// `source` indicates where the focus comes from.

src/view/view_wrapper.rs

@@ -55,6 +55,11 @@ pub trait ViewWrapper {
         self.get_view_mut().find_any(selector)
     }
 
+    /// Wraps the `focus_view` method.
+    fn wrap_focus_view(&mut self, selector: &Selector) -> Result<(), ()> {
+        self.get_view_mut().focus_view(selector)
+    }
+
     /// Wraps the `needs_relayout` method.
     fn wrap_needs_relayout(&self) -> bool {
         self.get_view().needs_relayout()
@@ -89,6 +94,10 @@ impl<T: ViewWrapper> View for T {
     fn needs_relayout(&self) -> bool {
         self.wrap_needs_relayout()
     }
+
+    fn focus_view(&mut self, selector: &Selector) -> Result<(), ()> {
+        self.wrap_focus_view(selector)
+    }
 }
 
 /// Convenient macro to implement the [`ViewWrapper`] trait.

src/views/dialog.rs

@@ -402,4 +402,8 @@ impl View for Dialog {
     fn find_any(&mut self, selector: &Selector) -> Option<&mut Any> {
         self.content.find_any(selector)
     }
+
+    fn focus_view(&mut self, selector: &Selector) -> Result<(), ()> {
+        self.content.focus_view(selector)
+    }
 }

src/views/id_view.rs

@@ -27,4 +27,11 @@ impl<T: View + Any> ViewWrapper for IdView<T> {
             s => self.view.find_any(s),
         }
     }
+
+    fn wrap_focus_view(&mut self, selector: &Selector) -> Result<(), ()> {
+        match selector {
+            &Selector::Id(id) if id == self.id => Ok(()),
+            s => self.view.focus_view(s),
+        }
+    }
 }

src/views/linear_layout.rs

@@ -401,4 +401,15 @@ impl View for LinearLayout {
             .filter_map(|c| c.view.find_any(selector))
             .next()
     }
+
+    fn focus_view(&mut self, selector: &Selector) -> Result<(), ()> {
+        for (i, child) in self.children.iter_mut().enumerate() {
+            if child.view.focus_view(selector).is_ok() {
+                self.focus = i;
+                return Ok(());
+            }
+        }
+
+        Err(())
+    }
 }

src/views/list_view.rs

@@ -118,7 +118,10 @@ impl ListView {
             direction::Relative::Front => {
                 let start = if from_focus { self.focus } else { 0 };
 
-                Box::new(self.children.iter_mut().enumerate().skip(start))
+                Box::new(self.children
+                             .iter_mut()
+                             .enumerate()
+                             .skip(start))
             }
             direction::Relative::Back => {
                 let end = if from_focus {
@@ -296,7 +299,8 @@ impl View for ListView {
 
     fn take_focus(&mut self, source: direction::Direction) -> bool {
         let rel = source.relative(direction::Orientation::Vertical);
-        let i = if let Some(i) = self.iter_mut(rel.is_none(),
+        let i = if let Some(i) =
+            self.iter_mut(rel.is_none(),
                           rel.unwrap_or(direction::Relative::Front))
                 .filter_map(|p| try_focus(p, source))
                 .next() {
@@ -317,4 +321,18 @@ impl View for ListView {
             .filter_map(|v| v.find_any(selector))
             .next()
     }
+
+    fn focus_view(&mut self, selector: &Selector) -> Result<(), ()> {
+        if let Some(i) = self.children
+               .iter_mut()
+               .enumerate()
+               .filter_map(|(i, v)| v.view().map(|v| (i, v)))
+               .filter_map(|(i, v)| v.focus_view(selector).ok().map(|_| i))
+               .next() {
+            self.focus = i;
+            Ok(())
+        } else {
+            Err(())
+        }
+    }
 }

src/views/stack_view.rs

@@ -186,4 +186,14 @@ impl View for StackView {
             .filter_map(|l| l.view.find_any(selector))
             .next()
     }
+
+    fn focus_view(&mut self, selector: &Selector) -> Result<(), ()> {
+        for layer in &mut self.layers {
+            if layer.view.focus_view(selector).is_ok() {
+                return Ok(());
+            }
+        }
+
+        Err(())
+    }
 }