Add proper draw and layout to Dialog

src/event.rs

@@ -17,3 +17,13 @@ pub enum EventResult {
     /// The event was consumed. An optionnal callback to run is attached.
     Consumed(Option<Rc<Callback>>, ViewPath),
 }
+
+impl EventResult {
+    pub fn callback(cb: Rc<Callback>) -> Self {
+        EventResult::Consumed(Some(cb), ViewPath::new())
+    }
+
+    pub fn consume() -> Self {
+        EventResult::Consumed(None, ViewPath::new())
+    }
+}

src/margins.rs

@@ -34,4 +34,12 @@ impl Margins {
     pub fn combined(&self) -> Vec2 {
         Vec2::new(self.horizontal(), self.vertical())
     }
+
+    pub fn top_left(&self) -> Vec2 {
+        Vec2::new(self.left, self.top)
+    }
+
+    pub fn bot_right(&self) -> Vec2 {
+        Vec2::new(self.right, self.bottom)
+    }
 }

src/vec.rs

@@ -1,7 +1,7 @@
-//! 2D points.
+//! Points on the 2D character grid.
 
 use std::ops::{Add, Sub, Mul, Div};
-use std::cmp::min;
+use std::cmp::{min,max};
 
 /// Simple 2D size, in characters.
 #[derive(Clone,Copy)]
@@ -21,12 +21,27 @@ impl Vec2 {
         }
     }
 
+    /// Returns a new Vec2 that is a maximum per coordinate.
+    pub fn max(a: Self, b: Self) -> Self {
+        Vec2::new(max(a.x, b.x), max(a.y, b.y))
+    }
+
     /// Returns a new Vec2 that is no larger than any input in both dimensions.
-    pub fn min(a: Vec2, b: Vec2) -> Vec2 {
-        Vec2 {
-            x: min(a.x, b.x),
-            y: min(a.y, b.y),
-        }
+    pub fn min(a: Self, b: Self) -> Self {
+        Vec2::new(min(a.x, b.x), min(a.y, b.y))
+    }
+
+    pub fn keep_x(&self) -> Self {
+        Vec2::new(self.x, 0)
+    }
+
+    pub fn keep_y(&self) -> Self {
+        Vec2::new(0, self.y)
+    }
+
+    /// Alias for Vec::new(0,0)
+    pub fn zero() -> Self {
+        Vec2::new(0,0)
     }
 }
 

src/view/button.rs

@@ -0,0 +1,44 @@
+use std::rc::Rc;
+
+use ncurses;
+
+use ::Cursive;
+use vec::Vec2;
+use view::{View,ViewPath,SizeRequest};
+use event::{Callback,EventResult};
+use printer::Printer;
+
+/// Simple text label with a callback when ENTER is pressed.
+pub struct Button {
+    label: String,
+    callback: Rc<Callback>,
+}
+
+impl Button {
+    pub fn new<F>(label: &str, cb: F) -> Self
+        where F: Fn(&mut Cursive, &ViewPath) + 'static
+    {
+        Button {
+            label: label.to_string(),
+            callback: Rc::new(Box::new(cb)),
+        }
+    }
+}
+
+impl View for Button {
+
+    fn draw(&self, printer: &Printer) {
+        printer.print(Vec2::zero(), &self.label);
+    }
+
+    fn get_min_size(&self, req: SizeRequest) -> Vec2 {
+        Vec2::new(self.label.len() as u32, 1)
+    }
+
+    fn on_key_event(&mut self, ch: i32) -> EventResult {
+        match ch {
+            ncurses::KEY_ENTER => EventResult::callback(self.callback.clone()),
+            _ => EventResult::Ignored,
+        }
+    }
+}

src/view/dialog.rs

@@ -1,5 +1,11 @@
-use ::Cursive;
+use std::cmp::max;
+
+use ncurses;
+
+use ::{Cursive,Margins};
+use event::EventResult;
 use view::{View,ViewPath,SizeRequest,DimensionRequest};
+use view::{Button,SizedView};
 use vec::Vec2;
 use printer::Printer;
 
@@ -11,7 +17,12 @@ enum Focus {
 
 pub struct Dialog {
     content: Box<View>,
-    buttons: Vec<Box<View>>,
+
+    buttons: Vec<SizedView<Button>>,
+
+    padding: Margins,
+    borders: Margins,
+
     focus: Focus,
 }
 
@@ -21,14 +32,19 @@ impl Dialog {
             content: Box::new(view),
             buttons: Vec::new(),
             focus: Focus::Nothing,
+            padding: Margins::new(1,1,0,0),
+            borders: Margins::new(1,1,1,1),
         }
     }
 
-    pub fn button<'a, F>(self, label: &'a str, cb: F) -> Self
-        where F: Fn(&mut Cursive, &ViewPath)
+    pub fn button<'a, F>(mut self, label: &'a str, cb: F) -> Self
+        where F: Fn(&mut Cursive, &ViewPath) + 'static
     {
+        self.buttons.push(SizedView::new(Button::new(label, cb)));
+
         self
     }
+
 }
 
 fn offset_request(request: DimensionRequest, offset: i32) -> DimensionRequest {
@@ -41,16 +57,86 @@ fn offset_request(request: DimensionRequest, offset: i32) -> DimensionRequest {
 
 impl View for Dialog {
     fn draw(&self, printer: &Printer) {
-        
+
+        let mut height = 0;
+        let mut x = 0;
+        for button in self.buttons.iter().rev() {
+            // button.draw(&printer.sub_printer(), 
+            let size = button.size;
+            let offset = printer.size - self.borders.bot_right() - self.padding.bot_right() - size - Vec2::new(x, 0);
+            button.draw(&printer.sub_printer(offset, size));
+            x += size.x + 1;
+            height = max(height, size.y+1);
+        }
+
+        let inner_size = printer.size
+            - Vec2::new(0, height)
+            - self.borders.combined()
+            - self.padding.combined();
+
+        self.content.draw(&printer.sub_printer(self.borders.top_left() + self.padding.top_left(), inner_size));
+
+        printer.print(Vec2::new(0,0), "+");
+        printer.print(Vec2::new(printer.size.x-1, 0), "+");
+        printer.print(Vec2::new(0, printer.size.y-1), "+");
+        printer.print(Vec2::new(printer.size.x-1, printer.size.y-1), "+");
     }
 
-    fn get_min_size(&self, size: SizeRequest) -> Vec2 {
-        let content_req = SizeRequest {
-            w: offset_request(size.w, -2),
-            h: offset_request(size.h, -2),
-        };
+    fn get_min_size(&self, req: SizeRequest) -> Vec2 {
+        let content_req = req.reduced(self.padding.combined() + self.borders.combined());
         let content_size = self.content.get_min_size(content_req);
 
-        content_size + (2u32,2u32)
+        let mut buttons_size = Vec2::new(0,0);
+        for button in self.buttons.iter() {
+            let s = button.view.get_min_size(req);
+            buttons_size.x += s.x + 1;
+            buttons_size.y = max(buttons_size.y, s.y + 1);
+        }
+
+        let inner_size = Vec2::new(
+            max(content_size.x, buttons_size.x),
+            content_size.y + buttons_size.y);
+
+        inner_size + self.padding.combined() + self.borders.combined()
+    }
+
+    fn layout(&mut self, mut size: Vec2) {
+        // First layout the buttons
+        size = size - (self.borders.combined() + self.padding.combined());
+        let req = SizeRequest {
+            w: DimensionRequest::AtMost(size.x),
+            h: DimensionRequest::AtMost(size.y),
+        };
+
+        let mut buttons_height = 0;
+        for button in self.buttons.iter_mut().rev() {
+            let size = button.get_min_size(req);
+            buttons_height = max(buttons_height, size.y+1);
+            button.layout(size);
+        }
+
+        self.content.layout(size - Vec2::new(0, buttons_height));
+    }
+
+    fn on_key_event(&mut self, ch: i32) -> EventResult {
+        match self.focus {
+            Focus::Content => match self.content.on_key_event(ch) {
+                EventResult::Ignored if !self.buttons.is_empty() => match ch {
+                    ncurses::KEY_DOWN => {
+                        self.focus = Focus::Button(0);
+                        EventResult::Consumed(None, ViewPath::new())
+                    },
+                    _ => EventResult::Ignored,
+                },
+                res => res,
+            },
+            Focus::Button(i) => match self.buttons[i].on_key_event(ch) {
+                EventResult::Ignored => match ch {
+                    _ => EventResult::Ignored,
+                },
+                res => res,
+            },
+            Focus::Nothing => EventResult::Ignored,
+        }
     }
 }

src/view/mod.rs

@@ -6,6 +6,9 @@ mod text_view;
 mod key_event_view;
 mod view_path;
 mod dialog;
+mod button;
+mod sized_view;
+mod view_wrapper;
 
 use std::any::Any;
 
@@ -15,9 +18,12 @@ pub use self::box_view::BoxView;
 pub use self::stack_view::StackView;
 pub use self::text_view::TextView;
 pub use self::dialog::Dialog;
+pub use self::button::Button;
+pub use self::sized_view::SizedView;
+pub use self::view_wrapper::ViewWrapper;
 
 use event::EventResult;
-use vec::Vec2;
+use vec::{Vec2,ToVec2};
 use printer::Printer;
 
 /// Describe constraints on a view layout in one dimension.
@@ -31,6 +37,16 @@ pub enum DimensionRequest {
     Unknown,
 }
 
+impl DimensionRequest {
+    pub fn reduced(self, offset: u32) -> Self {
+        match self {
+            DimensionRequest::Fixed(w) => DimensionRequest::Fixed(w - offset),
+            DimensionRequest::AtMost(w) => DimensionRequest::AtMost(w - offset),
+            DimensionRequest::Unknown => DimensionRequest::Unknown,
+        }
+    }
+}
+
 /// Describes constraints on a view layout.
 #[derive(PartialEq,Clone,Copy)]
 pub struct SizeRequest {
@@ -40,6 +56,23 @@ pub struct SizeRequest {
     pub h: DimensionRequest,
 }
 
+impl SizeRequest {
+    pub fn reduced<T: ToVec2>(self, offset: T) -> Self {
+        let ov = offset.to_vec2();
+        SizeRequest {
+            w: self.w.reduced(ov.x),
+            h: self.h.reduced(ov.y),
+        }
+    }
+
+    pub fn dummy() -> Self {
+        SizeRequest {
+            w: DimensionRequest::Unknown,
+            h: DimensionRequest::Unknown,
+        }
+    }
+}
+
 /// Main trait defining a view behaviour.
 pub trait View {
     /// Called when a key was pressed. Default implementation just ignores it.

src/view/sized_view.rs

@@ -0,0 +1,34 @@
+use view::View;
+use vec::Vec2;
+use view::ViewWrapper;
+
+/// Wrapper around a view that remembers its size.
+pub struct SizedView <T: View> {
+    pub view: T,
+    pub size: Vec2,
+}
+
+impl<T: View> SizedView<T> {
+    /// Wraps the given view.
+    pub fn new(view: T) -> Self {
+        SizedView {
+            view: view,
+            size: Vec2::zero(),
+        }
+    }
+}
+
+impl <T: View> ViewWrapper for SizedView<T> {
+    fn get_view(&self) -> &View {
+        &self.view
+    }
+
+    fn get_view_mut(&mut self) -> &mut View {
+        &mut self.view
+    }
+
+    fn wrap_layout(&mut self, size: Vec2) {
+        self.view.layout(size);
+        self.size = size;
+    }
+}

src/view/view_wrapper.rs

@@ -0,0 +1,43 @@
+use vec::Vec2;
+use view::{View,SizeRequest};
+use printer::Printer;
+use event::EventResult;
+
+pub trait ViewWrapper {
+    fn get_view(&self) -> &View;
+    fn get_view_mut(&mut self) -> &mut View;
+
+    fn wrap_draw(&self, printer: &Printer) {
+        self.get_view().draw(printer);
+    }
+
+    fn wrap_get_min_size(&self, req: SizeRequest) -> Vec2 {
+        self.get_view().get_min_size(req)
+    }
+
+    fn wrap_on_key_event(&mut self, ch: i32) -> EventResult {
+        self.get_view_mut().on_key_event(ch)
+    }
+
+    fn wrap_layout(&mut self, size: Vec2) {
+        self.get_view_mut().layout(size);
+    }
+}
+
+impl <T: ViewWrapper> View for T {
+    fn draw(&self, printer: &Printer) {
+        self.wrap_draw(printer);
+    }
+
+    fn get_min_size(&self, req: SizeRequest) -> Vec2 {
+        self.wrap_get_min_size(req)
+    }
+
+    fn on_key_event(&mut self, ch: i32) -> EventResult {
+        self.wrap_on_key_event(ch)
+    }
+
+    fn layout(&mut self, size: Vec2) {
+        self.wrap_layout(size);
+    }
+}