(#10) Introduce initial EditField implementation

examples/05_edit_field.rs

@@ -0,0 +1,15 @@
+use rcui::*;
+
+fn main() {
+    Rcui::exec(Proxy::wrap(
+        |field, rcui, event| {
+            if let Event::KeyStroke(key) = event {
+                if *key as u8 as char == '\n' {
+                    rcui.quit()
+                }
+            }
+            field.handle_event(rcui, event)
+        },
+        EditField::new(),
+    ))
+}

src/edit_field.rs

@@ -1 +1,49 @@
-// TODO(#10): EditField is not implemented
+use super::*;
+
+#[derive(Default)]
+pub struct EditField {
+    text: String,
+    buffer: Vec<u8>,
+    // TODO(#34): EditField does not have any cursor functionality
+}
+
+impl EditField {
+    pub fn new() -> Self {
+        Self {
+            text: String::new(),
+            buffer: Vec::new(),
+        }
+    }
+
+    pub fn wrap() -> Box<Self> {
+        Box::new(Self::new())
+    }
+}
+
+impl Widget for EditField {
+    fn render(&mut self, _context: &mut Rcui, rect: &Rect, _active: bool) {
+        let x = rect.x.floor() as i32;
+        let y = rect.y.floor() as i32;
+        mv(y, x);
+        // TODO(#35): EditField does not wrap during the rendering
+        addstr(&self.text);
+    }
+
+    fn handle_event(&mut self, _context: &mut Rcui, event: &Event) {
+        // TODO(#37): move the utf8 buffer mechanism to the main event loop
+        if let Event::KeyStroke(key) = event {
+            self.buffer.push(*key as u8);
+            match std::str::from_utf8(&self.buffer) {
+                Ok(s) => {
+                    self.text.push_str(&s);
+                    self.buffer.clear()
+                }
+                Err(_) => {
+                    if self.buffer.len() >= 4 {
+                        self.buffer.clear()
+                    }
+                }
+            }
+        }
+    }
+}

src/item_list.rs

@@ -82,7 +82,6 @@ impl<T: ToString + Clone> Widget for ItemList<T> {
                     };
 
                     attron(COLOR_PAIR(color_pair));
-                    // TODO(#17): ItemList should extend cursor to the whole available width
                     let x = rect.x.floor() as i32;
                     let y = (rect.y + i as f32).floor() as i32;
                     let w = rect.w.floor() as usize;

src/lib.rs

@@ -74,11 +74,17 @@ impl Rcui {
         self.event_queue.push_back(event);
     }
 
+    // TODO(#36): no support for nested event loops via Rcui::exec()
+
     pub fn exec(mut ui: Box<dyn Widget>) {
         let mut context = Self::new();
 
+        let locale_conf = LcCategory::all;
+        setlocale(locale_conf, "en_US.UTF-8");
+
         initscr();
         keypad(stdscr(), true);
+        timeout(10);
 
         start_color();
         init_pair(style::REGULAR_PAIR, COLOR_WHITE, COLOR_BLACK);
@@ -103,8 +109,20 @@ impl Rcui {
             }
             erase();
             ui.render(&mut context, &screen_rect(), true);
-            let key = getch();
-            context.push_event(Event::KeyStroke(key));
+
+            // Busy waiting on the key event
+            let mut key = getch();
+            while key == ERR {
+                key = getch();
+            }
+
+            // Flushing everything we've got
+            while key != ERR {
+                context.push_event(Event::KeyStroke(key));
+                key = getch();
+            }
+
+            // Handling all of the events from the queue
             while !context.event_queue.is_empty() {
                 if let Some(event) = context.event_queue.pop_front() {
                     if let Event::Quit = event {