Add scroll example

examples/scroll.rs

@@ -0,0 +1,31 @@
+extern crate cursive;
+
+use cursive::traits::Boxable;
+use cursive::views::{Canvas, Dialog, ScrollView, LinearLayout, Button};
+use cursive::Printer;
+
+fn main() {
+    let mut siv = cursive::Cursive::default();
+
+    siv.add_layer(Dialog::around(
+            ScrollView::new(
+                LinearLayout::vertical()
+                .child(Button::new("Foo", |s| s.add_layer(Dialog::info("Ah"))))
+                .child(Canvas::new(()).with_draw(draw).fixed_size((120, 40)))
+                .child(Button::new("Bar", |s| s.add_layer(Dialog::info("Uh"))))
+                ).scroll_x(true),
+            ).fixed_size((60, 30)));
+
+    siv.add_global_callback('q', |s| s.quit());
+
+    siv.run();
+}
+
+fn draw(_: &(), p: &Printer) {
+    for x in 0..p.size.x {
+        for y in 0..p.size.y {
+            let c = (x + 6*y) % 10;
+            p.print((x, y), &format!("{}", c));
+        }
+    }
+}