Try to draw simple "Hello world!"

showbits-thermal-printer/Cargo.toml

@@ -7,6 +7,7 @@ edition.workspace = true
 anyhow.workspace = true
 axum = "0.7.4"
 clap = { version = "4.5.1", features = ["derive", "deprecated"] }
+cosmic-text.workspace = true
 escpos = { version = "0.7.2", features = ["full"] }
 image.workspace = true
 palette.workspace = true

showbits-thermal-printer/src/drawer.rs

@@ -1,3 +1,10 @@
+use cosmic_text::{Attrs, Metrics};
+use palette::Srgb;
+use showbits_common::{
+    widgets::{FontStuff, HasFontStuff, Text},
+    Tree, WidgetExt,
+};
+use taffy::style_helpers::length;
 use tokio::sync::mpsc;
 
 use crate::printer::Printer;
@@ -10,14 +17,30 @@ pub enum Command {
     ChatMessage { username: String, content: String },
 }
 
+#[derive(Default)]
+struct Context {
+    font_stuff: FontStuff,
+}
+
+impl HasFontStuff for Context {
+    fn font_stuff(&mut self) -> &mut FontStuff {
+        &mut self.font_stuff
+    }
+}
+
 pub struct Drawer {
     rx: mpsc::Receiver<Command>,
     printer: Printer,
+    ctx: Context,
 }
 
 impl Drawer {
     pub fn new(rx: mpsc::Receiver<Command>, printer: Printer) -> Self {
-        Self { rx, printer }
+        Self {
+            rx,
+            printer,
+            ctx: Context::default(),
+        }
     }
 
     pub fn run(&mut self) -> anyhow::Result<()> {
@@ -35,17 +58,30 @@ impl Drawer {
         match command {
             Command::Stop => {} // Already handled one level above
             Command::Rip => self.printer.rip()?,
-            Command::Test => todo!(),
+            Command::Test => self.on_test()?,
             Command::Text(_) => todo!(),
             Command::ChatMessage { username, content } => todo!(),
         }
         Ok(())
     }
 
-    // fn on_rip(&mut self) -> anyhow::Result<()> {
-    //     self.printer.init()?.feeds(6)?.print()?;
-    //     Ok(())
-    // }
+    fn on_test(&mut self) -> anyhow::Result<()> {
+        let mut tree = Tree::<Context>::new();
+
+        let root = Text::simple(
+            &mut self.ctx.font_stuff,
+            Metrics::new(16.0, 32.0),
+            Attrs::new(),
+            "Hello world!",
+        )
+        .color(Srgb::new(1.0, 1.0, 1.0))
+        .node()
+        .margin_all(length(10.0))
+        .register(&mut tree)?;
+
+        self.printer.print_tree(&mut tree, &mut self.ctx, root)?;
+        Ok(())
+    }
 
     // fn on_text(&mut self, text: String) -> anyhow::Result<()> {
     //     let text = util::sanitize(&text);