Add Popup AsyncWidget

src/ui.rs

@@ -4,6 +4,7 @@ mod input;
 mod rooms;
 mod util;
 mod widgets;
+mod widgets2;
 
 use std::convert::Infallible;
 use std::io;

src/ui/widgets2.rs

@@ -0,0 +1,3 @@
+mod popup;
+
+pub use self::popup::*;

src/ui/widgets2/popup.rs

@@ -0,0 +1,54 @@
+use async_trait::async_trait;
+use toss::widgets::{Background, Border, Float, Layer2, Padding, Text};
+use toss::{AsyncWidget, Frame, Size, Style, Styled, WidgetExt, WidthDb};
+
+type Body<I> = Background<Border<Padding<I>>>;
+type Title = Float<Padding<Background<Padding<Text>>>>;
+
+pub struct Popup<I>(Float<Layer2<Body<I>, Title>>);
+
+impl<I> Popup<I> {
+    pub fn new<S: Into<Styled>>(inner: I, title: S) -> Self {
+        let title = Text::new(title)
+            .padding()
+            .with_horizontal(1)
+            // The background displaces the border without affecting the style
+            .background()
+            .with_style(Style::new())
+            .padding()
+            .with_horizontal(2)
+            .float()
+            .with_top()
+            .with_left();
+
+        let body = inner.padding().with_horizontal(1).border().background();
+
+        Self(title.above(body).float().with_center())
+    }
+
+    pub fn with_border_style(mut self, style: Style) -> Self {
+        let border = &mut self.0.inner.first.inner;
+        border.style = style;
+        self
+    }
+}
+
+#[async_trait]
+impl<E, I> AsyncWidget<E> for Popup<I>
+where
+    E: Send,
+    I: AsyncWidget<E> + Send + Sync,
+{
+    async fn size(
+        &self,
+        widthdb: &mut WidthDb,
+        max_width: Option<u16>,
+        max_height: Option<u16>,
+    ) -> Result<Size, E> {
+        self.0.size(widthdb, max_width, max_height).await
+    }
+
+    async fn draw(self, frame: &mut Frame) -> Result<(), E> {
+        self.0.draw(frame).await
+    }
+}