ui refactoring/update

src/main.rs

@@ -1,32 +1,11 @@
 extern crate gtk;
 extern crate cairo;
 
-use gtk::prelude::*;
-use gtk::{Window, WindowType, DrawingArea};
+mod ui;
+
+use ui::Ui;
 
 fn main() {
-    gtk::init().expect("Failed to initialize GTK");
-    let window = Window::new(WindowType::Toplevel);
-    let drawing_area = DrawingArea::new();
-    drawing_area.set_size_request(500, 500);
-    drawing_area.connect_draw(_gtk_draw);
-    window.add(&drawing_area);
-    window.show_all();
-    window.connect_delete_event(|_,_| {
-        gtk::main_quit();
-        Inhibit(false)
-    });
-
-    gtk::main();
+    Ui::new().start();
 }
 
-fn _gtk_draw(drawing_area: &DrawingArea, ctx: &cairo::Context) -> Inhibit {
-    let width = drawing_area.get_allocated_width() as f64;
-    let height = drawing_area.get_allocated_height() as f64;
-    ctx.set_source_rgb(1.0, 0.0, 0.0);
-    ctx.arc(width / 2.0, height / 2.0,
-             width / 2.0,
-             0.0, 2.0 * 3.14);
-    ctx.fill();
-    Inhibit(true)
-}

src/ui.rs

@@ -0,0 +1,49 @@
+use cairo;
+use gtk;
+use gtk::prelude::*;
+use gtk::{Window, WindowType, DrawingArea, Grid, Button, ButtonBox, Orientation};
+
+pub struct Ui;
+
+impl Ui {
+    pub fn new() -> Ui {
+        Ui
+    }
+
+    pub fn start(&self) {
+        gtk::init().expect("Failed to initialize GTK");
+        let window = Window::new(WindowType::Toplevel);
+
+        let grid = Grid::new();
+
+        let button_bar = ButtonBox::new(Orientation::Horizontal);
+        let save = Button::new_with_label("Save");
+        button_bar.add(&save);
+        grid.attach(&button_bar, 0, 0, 1, 1);
+
+        let drawing_area = DrawingArea::new();
+        drawing_area.set_size_request(500, 500);
+        drawing_area.connect_draw(Self::gtk_draw);
+        grid.attach(&drawing_area, 0, 1, 1, 1);
+
+        window.add(&grid);
+        window.show_all();
+        window.connect_delete_event(|_,_| {
+            gtk::main_quit();
+            Inhibit(false)
+        });
+
+        gtk::main();       
+    }
+
+    fn gtk_draw(drawing_area: &DrawingArea, ctx: &cairo::Context) -> Inhibit {
+        let width = drawing_area.get_allocated_width() as f64;
+        let height = drawing_area.get_allocated_height() as f64;
+        ctx.set_source_rgb(1.0, 0.0, 0.0);
+        ctx.arc(width / 2.0, height / 2.0,
+                width / 2.0,
+                0.0, 2.0 * 3.14);
+        ctx.fill();
+        Inhibit(true)
+    }
+}