Add on_submit to EditView

It simplifies the Edit example

examples/edit.rs

@@ -6,15 +6,9 @@ fn main() {
     let mut siv = Cursive::new();
 
     // Create a dialog with an edit text and a button.
-    siv.add_layer(Dialog::new(EditView::new().min_length(20).with_id("edit"))
+    siv.add_layer(Dialog::new(EditView::new()
-                      .padding((1, 1, 1, 0))
+                              .min_length(20)
-                      .title("Enter your name")
+                              .on_submit(|s, name| {
-                      .button("Ok", |s| {
-                          // When the button is clicked, read the text and print it in a new dialog.
-                          let name = s.find_id::<EditView>("edit")
-                                      .unwrap()
-                                      .get_content()
-                                      .to_string();
                                   if name.is_empty() {
                                       s.add_layer(Dialog::new(TextView::new("Please enter a name!"))
                                                   .dismiss_button("Ok"));
@@ -24,7 +18,9 @@ fn main() {
                                       s.add_layer(Dialog::new(TextView::new(&content))
                                                   .button("Quit", |s| s.quit()));
                                   }
-                      }));
+                              }))
+                      .padding((1, 1, 1, 0))
+                      .title("Enter your name"));
 
     siv.run();
 }

src/views/edit_view.rs

@@ -70,6 +70,9 @@ pub struct EditView {
     /// Will be called with the current content and the cursor position
     on_edit: Option<Rc<Fn(&mut Cursive, &str, usize)>>,
 
+    /// Callback when <Enter> is pressed.
+    on_submit: Option<Rc<Fn(&mut Cursive, &str)>>,
+
     enabled: bool,
 }
 
@@ -85,6 +88,7 @@ impl EditView {
             min_length: 1,
             last_length: 0, // scrollable: false,
             on_edit: None,
+            on_submit: None,
             enabled: true,
         }
     }
@@ -117,6 +121,14 @@ impl EditView {
         self
     }
 
+    /// Sets a callback to be called when `<Enter>` is pressed.
+    ///
+    /// `callback` will be given the content of the view.
+    pub fn on_submit<F: Fn(&mut Cursive, &str) + 'static>(mut self, callback: F) -> Self {
+        self.on_submit = Some(Rc::new(callback));
+        self
+    }
+
     /// Enable or disable this view.
     pub fn set_enabled(&mut self, enabled: bool) {
         self.enabled = enabled;
@@ -294,6 +306,13 @@ impl View for EditView {
                     .len();
                 self.remove(len);
             }
+            Event::Key(Key::Enter) if self.on_submit.is_some() => {
+                let cb = self.on_submit.clone().unwrap();
+                let content = self.content.clone();
+                return EventResult::with_cb(move |s| {
+                    cb(s, &content);
+                });
+            }
             _ => return EventResult::Ignored,
         }