added a input element #19

src/demos/mod.rs

@@ -16,10 +16,14 @@ pub fn app(screen: Arc<Screen>) -> Rsx {
     rsx! {
         @Handler::new({
             let screen = screen.clone();
-            move |_, _: &crossterm::event::Event| {
+            move |_, e: &crossterm::event::Event| {
+                if let crossterm::event::Event::Key(crossterm::event::KeyEvent { code, .. }) = e {
+                    if *code == crossterm::event::KeyCode::Char('q') {
                         screen.close();
+                    }
+                }
             }});
-        FlexRow, gap: 1, {
+        FlexRow {
             FlexCol, gap: 3, {
                 Heading, smooth: false, { "OSUI" }
                 @Transform::new().padding(2, 2);
@@ -37,11 +41,16 @@ pub fn app(screen: Arc<Screen>) -> Rsx {
                 // TODO: div with width full
             }
 
-            FlexCol {
+            FlexCol, gap: 2, {
+                @transform!{ y: Center };
                 static Div { // static only affects the element, not children
                     %count
                     "This will increment every second: {count}"
                 }
+
+                @Transform::new().padding(1, 1).dimensions(40, 1);
+                @Style { foreground: Some(0xffffff), background: Background::RoundedOutline(0xff0000) };
+                Input { }
             }
         }
     }

src/elements/input.rs

@@ -0,0 +1,73 @@
+use crossterm::event::{KeyCode, KeyEvent};
+
+use crate::{
+    state::{use_state, State},
+    widget::Element,
+};
+
+pub struct Input {
+    pub state: State<String>,
+    cursor: usize,
+}
+
+impl Element for Input {
+    fn render(&mut self, scope: &mut crate::prelude::RenderScope) {
+        let s = self.state.get();
+        scope.draw_text(0, 0, &s);
+        if let Some(c) = s.chars().nth(self.cursor) {
+            scope.draw_text_inverted(self.cursor as u16, 0, &c.to_string());
+        } else {
+            scope.draw_text_inverted(s.len() as u16, 0, " ");
+        }
+    }
+
+    fn event(&mut self, event: &dyn crate::prelude::Event) {
+        if let Some(crossterm::event::Event::Key(KeyEvent { code, .. })) = event.get() {
+            match code {
+                KeyCode::Char(c) => {
+                    self.state.get().insert(self.cursor, *c);
+                    self.cursor += 1;
+                }
+                KeyCode::Backspace => {
+                    if self.cursor > 0 {
+                        self.state.get().remove(self.cursor - 1);
+                        self.cursor -= 1;
+                    }
+                }
+                KeyCode::Delete => {
+                    if self.cursor > 0 && self.state.get().len() > self.cursor {
+                        self.state.get().remove(self.cursor);
+                    }
+                }
+                KeyCode::Left => {
+                    if self.cursor > 0 {
+                        self.cursor -= 1;
+                    }
+                }
+                KeyCode::Right => {
+                    if self.cursor < self.state.get().len() {
+                        self.cursor += 1;
+                    }
+                }
+                _ => {}
+            }
+        }
+    }
+
+    fn as_any(&self) -> &dyn std::any::Any {
+        self
+    }
+
+    fn as_any_mut(&mut self) -> &mut dyn std::any::Any {
+        self
+    }
+}
+
+impl Input {
+    pub fn new() -> Self {
+        Self {
+            state: use_state(String::new()),
+            cursor: 0,
+        }
+    }
+}