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src/ui/widgets/cursor.rs

@@ -0,0 +1,39 @@
+use async_trait::async_trait;
+use toss::frame::{Frame, Pos, Size};
+
+use super::{BoxedWidget, Widget};
+
+pub struct Cursor {
+    inner: BoxedWidget,
+    pos: Pos,
+}
+
+impl Cursor {
+    pub fn new<W: Into<BoxedWidget>>(inner: W) -> Self {
+        Self {
+            inner: inner.into(),
+            pos: Pos::ZERO,
+        }
+    }
+
+    pub fn at(mut self, pos: Pos) -> Self {
+        self.pos = pos;
+        self
+    }
+
+    pub fn at_xy(self, x: i32, y: i32) -> Self {
+        self.at(Pos::new(x, y))
+    }
+}
+
+#[async_trait]
+impl Widget for Cursor {
+    fn size(&self, frame: &mut Frame, max_width: Option<u16>, max_height: Option<u16>) -> Size {
+        self.inner.size(frame, max_width, max_height)
+    }
+
+    async fn render(self: Box<Self>, frame: &mut Frame) {
+        self.inner.render(frame).await;
+        frame.set_cursor(Some(self.pos));
+    }
+}