Add checkbox view

examples/list_view.rs

@@ -2,7 +2,7 @@ extern crate cursive;
 
 use cursive::Cursive;
 use cursive::With;
-use cursive::view::{ListView, Dialog, EditView, TextView, LinearLayout};
+use cursive::view::{ListView, Checkbox, Dialog, EditView, TextView, LinearLayout};
 
 fn main() {
     let mut siv = Cursive::new();
@@ -13,6 +13,7 @@ fn main() {
                                     .child(EditView::new().min_length(15))
                                     .child(TextView::new("@"))
                                     .child(EditView::new().min_length(10)))
+                              .child("Receive spam?", Checkbox::new())
                               .delimiter()
                               .with(|list| {
                                   for i in 0..50 {

src/view/checkbox.rs

@@ -0,0 +1,86 @@
+use With;
+use Printer;
+use vec::Vec2;
+use view::View;
+use event::{Event, EventResult, Key};
+use direction::Direction;
+
+
+/// Checkable box.
+#[derive(Debug)]
+pub struct Checkbox {
+    checked: bool,
+}
+
+impl Checkbox {
+    /// Creates a new, unchecked checkbox.
+    pub fn new() -> Self {
+        Checkbox {
+            checked: false,
+        }
+    }
+
+    /// Toggles the checkbox state.
+    pub fn toggle(&mut self) {
+        self.checked = !self.checked;
+    }
+
+    /// Check the checkbox.
+    pub fn check(&mut self) {
+        self.checked = true;
+    }
+
+    /// Check the checkbox.
+    ///
+    /// Chainable variant.
+    pub fn checked(self) -> Self {
+        self.with(Self::check)
+    }
+
+    /// Returns `true` if the checkbox is checked.
+    pub fn is_checked(&self) -> bool {
+        self.checked
+    }
+
+    /// Uncheck the checkbox.
+    pub fn uncheck(&mut self) {
+        self.checked = false;
+    }
+
+    /// Uncheck the checkbox.
+    ///
+    /// Chainable variant.
+    pub fn unchecked(self) -> Self {
+        self.with(Self::uncheck)
+    }
+}
+
+impl View for Checkbox {
+    fn get_min_size(&mut self, _: Vec2) -> Vec2 {
+        Vec2::new(3, 1)
+    }
+
+    fn take_focus(&mut self, _: Direction) -> bool {
+        true
+    }
+
+    fn draw(&self, printer: &Printer) {
+        printer.with_selection(printer.focused, |printer| {
+            printer.print((0,0), "[ ]");
+            if self.checked {
+                printer.print((1, 0), "X");
+            }
+        });
+
+    }
+
+    fn on_event(&mut self, event: Event) -> EventResult {
+        match event {
+            Event::Key(Key::Enter) |
+            Event::Char(' ') => self.toggle(),
+            _ => return EventResult::Ignored,
+        }
+
+        EventResult::Consumed(None)
+    }
+}

src/view/mod.rs

@@ -48,6 +48,7 @@ mod scroll;
 // Views
 mod box_view;
 mod button;
+mod checkbox;
 mod dialog;
 mod edit_view;
 mod full_view;
@@ -79,6 +80,7 @@ pub use self::scroll::ScrollBase;
 pub use self::id_view::IdView;
 pub use self::box_view::BoxView;
 pub use self::button::Button;
+pub use self::checkbox::Checkbox;
 pub use self::dialog::Dialog;
 pub use self::edit_view::EditView;
 pub use self::full_view::FullView;