Add Direction enum

And add a Direction argument to take_focus

examples/linear.rs

@@ -17,6 +17,9 @@ fn main() {
             .child(TextView::new("Title").h_align(HAlign::Center))
             // Box the textview, so it doesn't get too wide.
             // A 0 height value means it will be unconstrained.
+            .child(BoxView::fixed_width(30, TextView::new(text)))
+            .child(BoxView::fixed_width(30, TextView::new(text)))
+            .child(BoxView::fixed_width(30, TextView::new(text)))
             .child(BoxView::fixed_width(30, TextView::new(text))))
         .button("Quit", |s| s.quit())
         .h_align(HAlign::Center));

src/direction.rs

@@ -0,0 +1,203 @@
+//! Direction-related structures.
+//!
+//! This module defines two main concepts: [Orientation] and [Direction].
+//!
+//! ### Orientation
+//!
+//! `Orientation` is a simple enum that can take two values:
+//! `Horizontal` or `Vertical`.
+//!
+//! ### Direction
+//!
+//! `Direction` is a bit more complex, and can be of two kinds:
+//! * Absolute direction: left, up, right, or down
+//! * Relative direction: front or back.
+//!   Its actual direction depends on the orientation.
+
+use vec::Vec2;
+
+/// Describes a vertical or horizontal orientation for a view.
+#[derive(Clone,Copy,Debug,PartialEq)]
+pub enum Orientation {
+    /// Horizontal orientation
+    Horizontal,
+    /// Vertical orientation
+    Vertical,
+}
+
+impl Orientation {
+    /// Returns the component of `v` corresponding to this orientation.
+    ///
+    /// (`Horizontal` will return the x value,
+    /// and `Vertical` will return the y value.)
+    pub fn get(&self, v: &Vec2) -> usize {
+        *v.get(*self)
+    }
+
+    /// Returns the other orientation.
+    pub fn swap(&self) -> Self {
+        match *self {
+            Orientation::Horizontal => Orientation::Vertical,
+            Orientation::Vertical => Orientation::Horizontal,
+        }
+    }
+
+    /// Returns a mutable reference to the component of the given vector
+    /// corresponding to this orientation.
+    pub fn get_ref<'a, 'b>(&'a self, v: &'b mut Vec2) -> &'b mut usize {
+        match *self {
+            Orientation::Horizontal => &mut v.x,
+            Orientation::Vertical => &mut v.y,
+        }
+    }
+
+    /// Takes an iterator on sizes, and stack them in the current orientation,
+    /// returning the size of the required bounding box.
+    ///
+    /// For an horizontal view, returns (Sum(x), Max(y)).
+    /// For a vertical view, returns (Max(x),Sum(y)).
+    pub fn stack<'a, T: Iterator<Item = &'a Vec2>>(&self, iter: T) -> Vec2 {
+        match *self {
+            Orientation::Horizontal => {
+                iter.fold(Vec2::zero(), |a, b| a.stack_horizontal(b))
+            }
+            Orientation::Vertical => {
+                iter.fold(Vec2::zero(), |a, b| a.stack_vertical(b))
+            }
+        }
+    }
+
+    /// Creates a new `Vec2` with `value` in `self`'s axis.
+    pub fn make_vec(&self, value: usize) -> Vec2 {
+        let mut result = Vec2::zero();
+        *self.get_ref(&mut result) = value;
+        result
+    }
+}
+
+/// Represents a direction, either absolute or orientation-dependent.
+///
+/// * Absolute directions are Up, Down, Left, and Right.
+/// * Relative directions are Front and Back.
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub enum Direction {
+    /// An absolute direction.
+    Abs(Absolute),
+    /// A direction relative to the current orientation.
+    Rel(Relative),
+}
+
+impl Direction {
+    /// Returns the relative direction for the given orientation.
+    pub fn relative(self, orientation: Orientation) -> Option<Relative> {
+        match self {
+            Direction::Abs(abs) => abs.relative(orientation),
+            Direction::Rel(rel) => Some(rel),
+        }
+    }
+
+    /// Returns the absolute direction in the given `orientation`.
+    pub fn absolute(self, orientation: Orientation) -> Absolute {
+        match self {
+            Direction::Abs(abs) => abs,
+            Direction::Rel(rel) => rel.absolute(orientation),
+        }
+    }
+
+    /// Shortcut to create `Direction::Rel(Relative::Back)`
+    pub fn back() -> Self {
+        Direction::Rel(Relative::Back)
+    }
+
+    /// Shortcut to create `Direction::Rel(Relative::Front)`
+    pub fn front() -> Self {
+        Direction::Rel(Relative::Front)
+    }
+
+    /// Shortcut to create `Direction::Abs(Absolute::Left)`
+    pub fn left() -> Self {
+        Direction::Abs(Absolute::Left)
+    }
+
+    /// Shortcut to create `Direction::Abs(Absolute::Right)`
+    pub fn right() -> Self {
+        Direction::Abs(Absolute::Right)
+    }
+
+    /// Shortcut to create `Direction::Abs(Absolute::Up)`
+    pub fn up() -> Self {
+        Direction::Abs(Absolute::Up)
+    }
+
+    /// Shortcut to create `Direction::Abs(Absolute::Down)`
+    pub fn down() -> Self {
+        Direction::Abs(Absolute::Down)
+    }
+
+    /// Shortcut to create `Direction::Abs(Absolute::None)`
+    pub fn none() -> Self {
+        Direction::Abs(Absolute::None)
+    }
+}
+
+/// Direction relative to an orientation.
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub enum Relative {
+    /// Front relative direction.
+    ///
+    /// * Horizontally, this means `Left`
+    /// * Vertically, this means `Up`
+    ///
+    /// TODO: handle right-to-left?
+    Front,
+
+    /// Back relative direction.
+    ///
+    /// * Horizontally, this means `Right`
+    /// * Vertically, this means `Down`.
+    Back,
+}
+
+impl Relative {
+    /// Returns the absolute direction in the given `orientation`.
+    pub fn absolute(self, orientation: Orientation) -> Absolute {
+        match (orientation, self) {
+            (Orientation::Horizontal, Relative::Front) => Absolute::Left,
+            (Orientation::Horizontal, Relative::Back) => Absolute::Right,
+            (Orientation::Vertical, Relative::Front) => Absolute::Up,
+            (Orientation::Vertical, Relative::Back) => Absolute::Down,
+        }
+    }
+}
+
+/// Absolute direction (up, down, left, right).
+#[derive(Debug, Clone, Copy, PartialEq)]
+pub enum Absolute {
+    /// Left
+    Left,
+    /// Up
+    Up,
+    /// Right
+    Right,
+    /// Down
+    Down,
+
+    /// No real direction
+    None,
+}
+
+impl Absolute {
+    /// Returns the relative direction for the given orientation.
+    ///
+    /// Returns `None` when the direction does not apply to the given
+    /// orientation (ex: `Left` and `Vertical`).
+    pub fn relative(self, orientation: Orientation) -> Option<Relative> {
+        match (orientation, self) {
+            (Orientation::Horizontal, Absolute::Left) |
+            (Orientation::Vertical, Absolute::Up) => Some(Relative::Front),
+            (Orientation::Horizontal, Absolute::Right) |
+            (Orientation::Vertical, Absolute::Down) => Some(Relative::Back),
+            _ => None,
+        }
+    }
+}

src/lib.rs

@@ -52,12 +52,12 @@ pub mod vec;
 pub mod theme;
 pub mod align;
 pub mod menu;
+pub mod direction;
 
 // This probably doesn't need to be public?
 mod printer;
 mod menubar;
 mod xy;
-mod orientation;
 
 mod div;
 mod utf8;
@@ -65,7 +65,6 @@ mod utf8;
 mod backend;
 
 pub use xy::XY;
-pub use orientation::Orientation;
 pub use printer::Printer;
 
 use backend::{Backend, NcursesBackend};

src/menu.rs

@@ -89,7 +89,9 @@ impl MenuTree {
     }
 
     /// Adds a actionnable leaf to the end of this tree - chainable variant.
-    pub fn leaf<F: 'static + Fn(&mut Cursive)>(self, title: &str, cb: F) -> Self {
+    pub fn leaf<F>(self, title: &str, cb: F) -> Self
+        where F: 'static + Fn(&mut Cursive)
+    {
         self.with(|menu| menu.add_leaf(title, cb))
     }
 

src/orientation.rs

@@ -1,61 +0,0 @@
-//! Define an Orientation and associated methods.
-use vec::Vec2;
-
-/// Describes a vertical or horizontal orientation for a view.
-#[derive(Clone,Copy,Debug,PartialEq)]
-pub enum Orientation {
-    /// Horizontal orientation
-    Horizontal,
-    /// Vertical orientation
-    Vertical,
-}
-
-impl Orientation {
-    /// Returns the component of `v` corresponding to this orientation.
-    ///
-    /// (`Horizontal` will return the x value,
-    /// and `Vertical` will return the y value.)
-    pub fn get(&self, v: &Vec2) -> usize {
-        *v.get(*self)
-    }
-
-    /// Returns the other orientation.
-    pub fn swap(&self) -> Self {
-        match *self {
-            Orientation::Horizontal => Orientation::Vertical,
-            Orientation::Vertical => Orientation::Horizontal,
-        }
-    }
-
-    /// Returns a mutable reference to the component of the given vector
-    /// corresponding to this orientation.
-    pub fn get_ref<'a, 'b>(&'a self, v: &'b mut Vec2) -> &'b mut usize {
-        match *self {
-            Orientation::Horizontal => &mut v.x,
-            Orientation::Vertical => &mut v.y,
-        }
-    }
-
-    /// Takes an iterator on sizes, and stack them in the current orientation,
-    /// returning the size of the required bounding box.
-    ///
-    /// For an horizontal view, returns (Sum(x), Max(y)).
-    /// For a vertical view, returns (Max(x),Sum(y)).
-    pub fn stack<'a, T: Iterator<Item = &'a Vec2>>(&self, iter: T) -> Vec2 {
-        match *self {
-            Orientation::Horizontal => {
-                iter.fold(Vec2::zero(), |a, b| a.stack_horizontal(b))
-            }
-            Orientation::Vertical => {
-                iter.fold(Vec2::zero(), |a, b| a.stack_vertical(b))
-            }
-        }
-    }
-
-    /// Creates a new `Vec2` with `value` in `self`'s axis.
-    pub fn make_vec(&self, value: usize) -> Vec2 {
-        let mut result = Vec2::zero();
-        *self.get_ref(&mut result) = value;
-        result
-    }
-}

src/vec.rs

@@ -1,6 +1,6 @@
 //! Points on the 2D character grid.
 use XY;
-use orientation::Orientation;
+use direction::Orientation;
 
 use std::ops::{Add, Div, Mul, Sub};
 use std::cmp::{Ordering, max, min};

src/view/button.rs

@@ -1,5 +1,6 @@
 use std::rc::Rc;
 
+use direction::Direction;
 use theme::ColorStyle;
 use Cursive;
 use vec::Vec2;
@@ -58,7 +59,7 @@ impl View for Button {
         }
     }
 
-    fn take_focus(&mut self) -> bool {
+    fn take_focus(&mut self, _: Direction) -> bool {
         true
     }
 }

src/view/dialog.rs

@@ -2,6 +2,7 @@ use std::cmp::max;
 use std::any::Any;
 
 use Cursive;
+use direction;
 use align::*;
 use event::*;
 use theme::ColorStyle;
@@ -246,16 +247,34 @@ impl View for Dialog {
                     EventResult::Ignored => {
                         match event {
                             // Up goes back to the content
-                            Event::Key(Key::Up) |
-                            Event::Key(Key::Tab) |
-                            Event::Shift(Key::Tab) => {
-                                if self.content.take_focus() {
+                            Event::Key(Key::Up) => {
+                                if self.content
+                                    .take_focus(direction::Direction::down()) {
                                     self.focus = Focus::Content;
                                     EventResult::Consumed(None)
                                 } else {
                                     EventResult::Ignored
                                 }
                             }
+                            Event::Shift(Key::Tab) => {
+                                if self.content
+                                    .take_focus(direction::Direction::back()) {
+                                    self.focus = Focus::Content;
+                                    EventResult::Consumed(None)
+                                } else {
+                                    EventResult::Ignored
+                                }
+                            }
+                            Event::Key(Key::Tab) => {
+                                if self.content
+                                    .take_focus(direction::Direction::front()) {
+                                    self.focus = Focus::Content;
+                                    EventResult::Consumed(None)
+                                } else {
+                                    EventResult::Ignored
+                                }
+
+                            }
                             // Left and Right move to other buttons
                             Event::Key(Key::Right) if i + 1 <
                                                       self.buttons
@@ -276,9 +295,10 @@ impl View for Dialog {
         }
     }
 
-    fn take_focus(&mut self) -> bool {
-        // TODO: add a direction to the focus. Meanwhile, takes button first.
-        if self.content.take_focus() {
+    fn take_focus(&mut self, source: direction::Direction) -> bool {
+        // Dialogs aren't meant to be used in layouts, so...
+        // Let's be super lazy and not even care about the focus source.
+        if self.content.take_focus(source) {
             self.focus = Focus::Content;
             true
         } else if !self.buttons.is_empty() {

src/view/edit_view.rs

@@ -1,6 +1,7 @@
 use unicode_segmentation::UnicodeSegmentation;
 use unicode_width::UnicodeWidthStr;
 
+use direction::Direction;
 use theme::{ColorStyle, Effect};
 use vec::Vec2;
 use view::{IdView, View};
@@ -144,7 +145,7 @@ impl View for EditView {
         Vec2::new(self.min_length, 1)
     }
 
-    fn take_focus(&mut self) -> bool {
+    fn take_focus(&mut self, _: Direction) -> bool {
         true
     }
 

src/view/full_view.rs

@@ -1,5 +1,5 @@
 use view::{View, ViewWrapper};
-use orientation::Orientation;
+use direction::Orientation;
 use vec::Vec2;
 
 /// Simple wrapper view that asks for all the space it can get.

src/view/linear_layout.rs

@@ -1,9 +1,9 @@
 use XY;
+use direction;
 use view::View;
 use view::SizeCache;
 use vec::Vec2;
 use Printer;
-use orientation::Orientation;
 use event::{Event, EventResult, Key};
 
 use std::cmp::min;
@@ -11,7 +11,7 @@ use std::cmp::min;
 /// Arranges its children linearly according to its orientation.
 pub struct LinearLayout {
     children: Vec<Child>,
-    orientation: Orientation,
+    orientation: direction::Orientation,
     focus: usize,
 
     cache: Option<XY<SizeCache>>,
@@ -40,7 +40,7 @@ impl Child {
 
 impl LinearLayout {
     /// Creates a new layout with the given orientation.
-    pub fn new(orientation: Orientation) -> Self {
+    pub fn new(orientation: direction::Orientation) -> Self {
         LinearLayout {
             children: Vec::new(),
             orientation: orientation,
@@ -77,12 +77,12 @@ impl LinearLayout {
 
     /// Creates a new vertical layout.
     pub fn vertical() -> Self {
-        LinearLayout::new(Orientation::Vertical)
+        LinearLayout::new(direction::Orientation::Vertical)
     }
 
     /// Creates a new horizontal layout.
     pub fn horizontal() -> Self {
-        LinearLayout::new(Orientation::Horizontal)
+        LinearLayout::new(direction::Orientation::Horizontal)
     }
 
     // If the cache can be used, return the cached size.
@@ -110,15 +110,60 @@ impl LinearLayout {
             .any(View::needs_relayout)
     }
 
+    /// Returns a cyclic mutable iterator starting with the child in focus
+    fn iter_mut<'a>(&'a mut self, from_focus: bool,
+                    direction: direction::Relative)
+                    -> Box<Iterator<Item = (usize, &'a mut Child)> + 'a> {
+
+        match direction {
+            direction::Relative::Front => {
+                let start = if from_focus {
+                    self.focus
+                } else {
+                    0
+                };
+
+                Box::new(self.children.iter_mut().enumerate().skip(start))
+            }
+            direction::Relative::Back => {
+                let end = if from_focus {
+                    self.focus + 1
+                } else {
+                    self.children.len()
+                };
+                Box::new(self.children[..end].iter_mut().enumerate().rev())
+            }
+        }
+    }
+
+    fn move_focus(&mut self, source: direction::Direction) -> EventResult {
+
+        let i = if let Some(i) = source.relative(self.orientation)
+            .and_then(|rel| {
+                // The iterator starts at the focused element.
+                // We don't want that one.
+                self.iter_mut(true, rel)
+                    .skip(1)
+                    .filter_map(|p| try_focus(p, source))
+                    .next()
+            }) {
+            i
+        } else {
+            return EventResult::Ignored;
+        };
+        self.focus = i;
+        EventResult::Consumed(None)
+    }
+
     fn focus_prev(&mut self) -> EventResult {
         if let Some(i) = self.children[..self.focus]
             .iter_mut()
             .rev()
             .map(Child::as_mut)
-            .position(View::take_focus) {
+            .position(|v| v.take_focus(direction::Direction::back())) {
 
             // We're looking at the list in reverse
-            self.focus -= i+1;
+            self.focus -= i + 1;
             EventResult::Consumed(None)
         } else {
             EventResult::Ignored
@@ -130,7 +175,7 @@ impl LinearLayout {
             .iter_mut()
             .rev()
             .map(Child::as_mut)
-            .position(View::take_focus) {
+            .position(|v| v.take_focus(direction::Direction::front())) {
             // Our slice doesn't start at 0
             self.focus += i + 1;
             EventResult::Consumed(None)
@@ -140,6 +185,15 @@ impl LinearLayout {
     }
 }
 
+fn try_focus((i, child): (usize, &mut Child), source: direction::Direction)
+             -> Option<usize> {
+    if child.view.take_focus(source) {
+        Some(i)
+    } else {
+        None
+    }
+}
+
 impl View for LinearLayout {
     fn draw(&mut self, printer: &Printer) {
         // Use pre-computed sizes
@@ -282,16 +336,25 @@ impl View for LinearLayout {
         compromise
     }
 
-    fn take_focus(&mut self) -> bool {
-        if let Some(i) = self.children
-            .iter_mut()
-            .map(Child::as_mut)
-            .position(View::take_focus) {
-            self.focus = i;
-            true
+    fn take_focus(&mut self, source: direction::Direction) -> bool {
+        // In what order will we iterate on the children?
+        let rel = source.relative(self.orientation);
+        // We activate from_focus only if coming from the "sides".
+        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() {
+
+            // ... we can't update `self.focus` here,
+            // because rustc thinks we still borrow `self`.
+            // :(
+            i
         } else {
-            false
-        }
+            return false;
+        };
+
+        self.focus = i;
+        true
     }
 
     fn on_event(&mut self, event: Event) -> EventResult {
@@ -299,31 +362,36 @@ impl View for LinearLayout {
             EventResult::Ignored => {
                 match event {
                     Event::Shift(Key::Tab) if self.focus > 0 => {
-                        self.focus_prev()
+                        self.move_focus(direction::Direction::back())
                     }
                     Event::Key(Key::Tab) if self.focus + 1 <
                                             self.children.len() => {
-                        self.focus_next()
+                        self.move_focus(direction::Direction::front())
                     }
-                    Event::Key(Key::Left) if self.orientation ==
-                                             Orientation::Horizontal &&
-                                             self.focus > 0 => {
-                        self.focus_prev()
+                    Event::Key(Key::Left)
+                        if self.orientation ==
+                           direction::Orientation::Horizontal &&
+                           self.focus > 0 => {
+                        self.move_focus(direction::Direction::right())
                     }
                     Event::Key(Key::Up) if self.orientation ==
-                                           Orientation::Vertical &&
-                                           self.focus > 0 => self.focus_prev(),
-                    Event::Key(Key::Right) if self.orientation ==
-                                              Orientation::Horizontal &&
-                                              self.focus + 1 <
-                                              self.children.len() => {
-                        self.focus_next()
+                                           direction::Orientation::Vertical &&
+                                           self.focus > 0 => {
+                        self.move_focus(direction::Direction::down())
                     }
-                    Event::Key(Key::Down) if self.orientation ==
-                                             Orientation::Vertical &&
-                                             self.focus + 1 <
-                                             self.children.len() => {
-                        self.focus_next()
+                    Event::Key(Key::Right)
+                        if self.orientation ==
+                           direction::Orientation::Horizontal &&
+                           self.focus + 1 <
+                           self.children.len() => {
+                        self.move_focus(direction::Direction::left())
+                    }
+                    Event::Key(Key::Down)
+                        if self.orientation ==
+                           direction::Orientation::Vertical &&
+                           self.focus + 1 <
+                           self.children.len() => {
+                        self.move_focus(direction::Direction::up())
                     }
                     _ => EventResult::Ignored,
                 }

src/view/mod.rs

@@ -25,7 +25,8 @@
 //! * By default, `View::layout()` should be called before any call to
 //!   `View::draw()` with the same available size. The only exceptions is
 //!   when both following conditions are met:
-//!     * The available size has not changed since the last call to `View::layout()`
+//!     * The available size has not changed since the last call to
+//!       `View::layout()`
 //!     * `View::needs_relayout()` returns `false`
 //!
 //!   In this case, it is safe to omit the call to `View::layout()`.
@@ -65,6 +66,7 @@ mod tracked_view;
 use std::any::Any;
 
 use XY;
+use direction::Direction;
 use event::{Event, EventResult};
 use vec::Vec2;
 use Printer;
@@ -135,7 +137,11 @@ pub trait View {
     }
 
     /// This view is offered focus. Will it take it?
-    fn take_focus(&mut self) -> bool {
+    ///
+    /// `source` indicates where the focus comes from.
+    /// When the source is unclear, `Front` is usually used.
+    fn take_focus(&mut self, source: Direction) -> bool {
+        let _ = source;
         false
     }
 }
@@ -178,7 +184,7 @@ impl SizeCache {
     /// * for each dimension, `constrained = (size == req)`
     fn build(size: Vec2, req: Vec2) -> XY<Self> {
         XY::new(SizeCache::new(size.x, size.x == req.x),
-        SizeCache::new(size.y, size.y == req.y))
+                SizeCache::new(size.y, size.y == req.y))
     }
 }
 

src/view/select_view.rs

@@ -2,6 +2,7 @@ use std::cmp::min;
 use std::rc::Rc;
 
 use Cursive;
+use direction::Direction;
 use view::{IdView, View};
 use align::{Align, HAlign, VAlign};
 use view::scroll::ScrollBase;
@@ -215,7 +216,7 @@ impl<T: 'static> View for SelectView<T> {
         EventResult::Consumed(None)
     }
 
-    fn take_focus(&mut self) -> bool {
+    fn take_focus(&mut self, _: Direction) -> bool {
         true
     }
 

src/view/stack_view.rs

@@ -1,5 +1,6 @@
 use std::any::Any;
 
+use direction::Direction;
 use backend::Backend;
 use vec::Vec2;
 use view::{Offset, Position, Selector, ShadowView, View};
@@ -96,7 +97,7 @@ impl View for StackView {
             // We do it here instead of when adding a new layer because...?
             // (TODO: try to make it during layer addition)
             if layer.virgin {
-                layer.view.take_focus();
+                layer.view.take_focus(Direction::none());
                 layer.virgin = false;
             }
         }
@@ -111,10 +112,10 @@ impl View for StackView {
             .fold(Vec2::new(1, 1), Vec2::max)
     }
 
-    fn take_focus(&mut self) -> bool {
+    fn take_focus(&mut self, source: Direction) -> bool {
         match self.layers.last_mut() {
             None => false,
-            Some(mut v) => v.view.take_focus(),
+            Some(mut v) => v.view.take_focus(source),
         }
     }
 

src/view/text_view.rs

@@ -1,4 +1,5 @@
 use XY;
+use direction::Direction;
 use vec::Vec2;
 use view::View;
 use view::SizeCache;
@@ -239,7 +240,7 @@ impl View for TextView {
         size.or_min((self.width.unwrap_or(0), self.rows.len()))
     }
 
-    fn take_focus(&mut self) -> bool {
+    fn take_focus(&mut self, _: Direction) -> bool {
         self.scrollbase.scrollable()
     }
 

src/view/view_wrapper.rs

@@ -1,5 +1,6 @@
 use std::any::Any;
 
+use direction::Direction;
 use vec::Vec2;
 use view::{Selector, View};
 use Printer;
@@ -37,8 +38,8 @@ pub trait ViewWrapper {
     }
 
     /// Wraps the `take_focus` method.
-    fn wrap_take_focus(&mut self) -> bool {
-        self.get_view_mut().take_focus()
+    fn wrap_take_focus(&mut self, source: Direction) -> bool {
+        self.get_view_mut().take_focus(source)
     }
 
     /// Wraps the `find` method.
@@ -69,8 +70,8 @@ impl<T: ViewWrapper> View for T {
         self.wrap_layout(size);
     }
 
-    fn take_focus(&mut self) -> bool {
-        self.wrap_take_focus()
+    fn take_focus(&mut self, source: Direction) -> bool {
+        self.wrap_take_focus(source)
     }
 
     fn find(&mut self, selector: &Selector) -> Option<&mut Any> {

src/xy.rs

@@ -1,4 +1,4 @@
-use orientation::Orientation;
+use direction::Orientation;
 
 use std::iter;
 
@@ -46,14 +46,12 @@ impl<T> XY<T> {
     }
 
     /// Returns a new XY by calling `f` on `self` and `other` for each axis.
-    pub fn zip_map<U,V,F: Fn(T,U) -> V>(self, other: XY<U>, f: F) -> XY<V> {
-        XY::new(f(self.x, other.x),
-                f(self.y, other.y))
+    pub fn zip_map<U, V, F: Fn(T, U) -> V>(self, other: XY<U>, f: F) -> XY<V> {
+        XY::new(f(self.x, other.x), f(self.y, other.y))
     }
 }
 
-impl <T> XY<Option<T>> {
-
+impl<T> XY<Option<T>> {
     /// Returns a new XY by calling `unwrap_or` on each axis.
     pub fn unwrap_or(self, other: XY<T>) -> XY<T> {
         self.zip_map(other, |s, o| s.unwrap_or(o))