update examples

examples/edn.rs

@@ -0,0 +1,48 @@
+use tek_tui::{*, tek_layout::{*, tek_engine::*}};
+use tek_edn::*;
+use std::sync::{Arc, RwLock};
+use crossterm::event::{*, KeyCode::*};
+
+const EDN: &'static [&'static str] = &[
+    include_str!("edn01.edn"),
+    include_str!("edn02.edn"),
+];
+
+fn main () -> Usually<()> {
+    let state = Arc::new(RwLock::new(Example(0)));
+    Tui::new().unwrap().run(&state)?;
+    Ok(())
+}
+
+pub struct Example(usize);
+
+impl EdnViewData<TuiOut> for &Example {
+    fn get_content <'a> (&'a self, sym: EdnItem<&'a str>) -> RenderBox<'a, TuiOut> {
+        Box::new(Thunk::new(move||match sym {
+            EdnItem::Sym(":hello-world") => "Hello world!",
+            EdnItem::Sym(":hello") => "Hello",
+            EdnItem::Sym(":world") => "world",
+            _ => ""
+        }))
+    }
+}
+
+impl Content<TuiOut> for Example {
+    fn content (&self) -> impl Render<TuiOut> {
+        Bsp::a(
+            Push::xy(1, 1, Align::n(format!("Example {}/{}:", self.0 + 1, EDN.len()))),
+            EdnView::new(self, EDN[self.0])
+        )
+    }
+}
+
+impl Handle<TuiIn> for Example {
+    fn handle (&mut self, input: &TuiIn) -> Perhaps<bool> {
+        match input.event() {
+            kpat!(Right) => self.0 = (self.0 + 1) % EDN.len(),
+            kpat!(Left) => self.0 = if self.0 > 0 { self.0 - 1 } else { EDN.len() - 1 },
+            _ => return Ok(None)
+        }
+        Ok(Some(true))
+    }
+}