add ShowSize

src/draw/sizer.rs

@@ -29,3 +29,17 @@ impl Sizer {
         })
     }
 }
+
+pub struct ShowSize;
+
+impl Draw<Tui> for ShowSize {
+    fn layout (&self, area: XYWH<u16>) -> Perhaps<XYWH<u16>> {
+        let info = format!("{area:?}");
+        Ok(Some(XYWH(area.0, area.1, info.len() as u16, 1)))
+    }
+    fn draw (self, to: &mut Tui) -> Drawn<u16> {
+        let area = to.area();
+        let info = format!("{area:?}");
+        to.text(&info, area.0, area.1, info.len() as u16)
+    }
+}