Rename Margins -> Vec4

And move it to the vec module

examples/lorem.rs

@@ -22,6 +22,7 @@ fn main() {
     siv.add_layer(TextView::new(&content));
     // Show a popup on top of the view.
     siv.add_layer(Dialog::new(TextView::new("Try resizing the terminal!\n(Press 'q' to quit when you're done.)"))
+                  .padding((0,0,0,0))
                   .dismiss_button("Ok"));
 
     siv.run();

src/lib.rs

@@ -30,9 +30,6 @@ pub mod vec;
 pub mod color;
 
 mod div;
-mod margins;
-
-pub use margins::Margins;
 
 use std::any::Any;
 use std::rc::Rc;

src/margins.rs

@@ -1,50 +0,0 @@
-use vec::Vec2;
-
-/// Fixed margins around a rectangular view.
-pub struct Margins {
-    /// Left margin
-    pub left: usize,
-    /// Right margin
-    pub right: usize,
-    /// Top margin
-    pub top: usize,
-    /// Bottom margin
-    pub bottom: usize,
-}
-
-impl Margins {
-    /// Creates new margins.
-    pub fn new(left: usize, right: usize, top: usize, bottom: usize) -> Self {
-        Margins {
-            left: left,
-            right: right,
-            top: top,
-            bottom: bottom,
-        }
-    }
-
-    /// Returns left + right.
-    pub fn horizontal(&self) -> usize {
-        self.left + self.right
-    }
-
-    /// Returns top + bottom.
-    pub fn vertical(&self) -> usize {
-        self.top + self.bottom
-    }
-
-    /// Returns (left+right, top+bottom).
-    pub fn combined(&self) -> Vec2 {
-        Vec2::new(self.horizontal(), self.vertical())
-    }
-
-    /// Returns (left, top).
-    pub fn top_left(&self) -> Vec2 {
-        Vec2::new(self.left, self.top)
-    }
-
-    /// Returns (right, bottom).
-    pub fn bot_right(&self) -> Vec2 {
-        Vec2::new(self.right, self.bottom)
-    }
-}

src/vec.rs

@@ -122,3 +122,74 @@ impl Mul<usize> for Vec2 {
         }
     }
 }
+
+/// Four values representing each direction.
+pub struct Vec4 {
+    /// Left margin
+    pub left: usize,
+    /// Right margin
+    pub right: usize,
+    /// Top margin
+    pub top: usize,
+    /// Bottom margin
+    pub bottom: usize,
+}
+
+impl Vec4 {
+    /// Creates a new Vec4.
+    pub fn new(left: usize, right: usize, top: usize, bottom: usize) -> Self {
+        Vec4 {
+            left: left,
+            right: right,
+            top: top,
+            bottom: bottom,
+        }
+    }
+
+    /// Returns left + right.
+    pub fn horizontal(&self) -> usize {
+        self.left + self.right
+    }
+
+    /// Returns top + bottom.
+    pub fn vertical(&self) -> usize {
+        self.top + self.bottom
+    }
+
+    /// Returns (left+right, top+bottom).
+    pub fn combined(&self) -> Vec2 {
+        Vec2::new(self.horizontal(), self.vertical())
+    }
+
+    /// Returns (left, top).
+    pub fn top_left(&self) -> Vec2 {
+        Vec2::new(self.left, self.top)
+    }
+
+    /// Returns (right, bottom).
+    pub fn bot_right(&self) -> Vec2 {
+        Vec2::new(self.right, self.bottom)
+    }
+}
+
+/// Generic trait for converting a value into a Vec4.
+pub trait ToVec4 {
+    /// Converts self to a Vec4.
+    fn to_vec4(self) -> Vec4;
+}
+
+impl ToVec4 for Vec4 {
+    fn to_vec4(self) -> Vec4 { self }
+}
+
+impl ToVec4 for (usize,usize,usize,usize) {
+    fn to_vec4(self) -> Vec4 {
+        Vec4::new(self.0, self.1, self.2, self.3)
+    }
+}
+
+impl ToVec4 for (i32,i32,i32,i32) {
+    fn to_vec4(self) -> Vec4 {
+        Vec4::new(self.0 as usize, self.1 as usize, self.2 as usize, self.3 as usize)
+    }
+}

src/view/dialog.rs

@@ -3,11 +3,11 @@ use std::cmp::max;
 use ncurses;
 
 use color;
-use ::{Cursive,Margins};
+use ::{Cursive};
 use event::EventResult;
 use view::{View,SizeRequest,DimensionRequest};
 use view::{Button,SizedView};
-use vec::Vec2;
+use vec::{Vec2,Vec4,ToVec4};
 use printer::Printer;
 
 #[derive(PartialEq)]
@@ -29,8 +29,8 @@ pub struct Dialog {
 
     buttons: Vec<SizedView<Button>>,
 
-    padding: Margins,
-    borders: Margins,
+    padding: Vec4,
+    borders: Vec4,
 
     focus: Focus,
 }
@@ -43,8 +43,8 @@ impl Dialog {
             buttons: Vec::new(),
             title: String::new(),
             focus: Focus::Content,
-            padding: Margins::new(1,1,0,0),
-            borders: Margins::new(1,1,1,1),
+            padding: Vec4::new(1,1,0,0),
+            borders: Vec4::new(1,1,1,1),
         }
     }
 
@@ -71,6 +71,12 @@ impl Dialog {
         self
     }
 
+    pub fn padding<T: ToVec4>(mut self, padding: T) -> Self {
+        self.padding = padding.to_vec4();
+
+        self
+    }
+
 }
 
 impl View for Dialog {