add second example with TTYApplication & Char-View

Cargo.toml

@@ -2,6 +2,7 @@
 members = [
     "lib-nested-core",
     "lib-nested-tty",
-    "examples/tty-01-hello"
+    "examples/tty-01-hello",
+    "examples/tty-02-node"
 ]
 

examples/tty-02-node/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "tty-02-node"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+r3vi = { path = "../../../lib-r3vi" }
+nested = { path = "../../lib-nested-core" }
+nested-tty = { path = "../../lib-nested-tty" }
+termion = "*"
+cgmath = "*"
+
+[dependencies.async-std]
+version = "1.9.0"
+features = ["unstable", "attributes"]
+

examples/tty-02-node/src/main.rs

@@ -0,0 +1,89 @@
+extern crate cgmath;
+extern crate nested;
+extern crate nested_tty;
+extern crate r3vi;
+extern crate termion;
+
+use {
+    cgmath::Vector2,
+    nested::{
+        editTree::NestedNode,
+        reprTree::{Context, ReprTree},
+    },
+    nested_tty::{
+        terminal::TermOutWriter, DisplaySegment, Terminal, TerminalAtom, TerminalCompositor,
+        TerminalEvent, TerminalStyle, TerminalView,
+        TTYApplication
+    },
+    r3vi::{
+        buffer::singleton::*,
+        view::{port::UpdateTask, singleton::*, ViewPort},
+    },
+    std::sync::{Arc, Mutex, RwLock},
+    termion::event::{Event, Key},
+};
+
+#[async_std::main]
+async fn main() {
+    let app = TTYApplication::new( |ev| { /* event handler */ } );
+    let compositor = TerminalCompositor::new(app.port.inner());
+
+    /* setup context & create Editor-Tree
+     */
+    let ctx = Arc::new(RwLock::new(Context::default()));
+
+    // abstract data
+    let rt = ReprTree::from_char(&ctx, 'λ');
+
+    let mut node = Context::make_node(
+        &ctx,
+        // node type
+        Context::parse(&ctx, "Char"),
+        // depth
+        SingletonBuffer::new(0).get_port(),
+    )
+    .unwrap();
+
+    /* add a display view to the node
+     */
+    let char_view = rt
+        .read()
+        .unwrap()
+        .get_port::<dyn SingletonView<Item = char>>()
+        .expect("unable to get Char-view")
+        .map(move |c| TerminalAtom::from(if c == '\0' { ' ' } else { c }))
+        .to_grid();
+
+    let mut display_rt = ReprTree::new(Context::parse(&ctx, "Display"));
+
+    display_rt.insert_branch(ReprTree::new_leaf(
+        Context::parse(&ctx, "TerminalView"),
+        char_view.into(),
+    ));
+
+    node = node.set_view(Arc::new(RwLock::new(display_rt)));
+
+    compositor.write().unwrap().push(
+        nested_tty::make_label("Hello World")
+            .map_item(|p, a| {
+                a.add_style_back(TerminalStyle::fg_color(((25 * p.x % 255) as u8, 200, 0)))
+            })
+            .offset(Vector2::new(5, 0)),
+    );
+
+    compositor.write().unwrap()
+        .push(nested_tty::make_label("Char").offset(Vector2::new(0, 2)));
+
+    compositor.write().unwrap()
+        .push(node.display_view().offset(Vector2::new(15, 2)));
+
+    compositor.write().unwrap()
+        .push(nested_tty::make_label("<List Char>").offset(Vector2::new(0, 3)));
+
+    compositor.write().unwrap()
+        .push(nested_tty::make_label("---").offset(Vector2::new(15, 3)));
+
+    /* write the changes in the view of `term_port` to the terminal
+     */
+    app.show().await.expect("output error!");
+}