added heading #19

src/demos/mod.rs

@@ -20,7 +20,8 @@ pub fn app(screen: Arc<Screen>) -> Rsx {
                 screen.close();
         }});
         FlexRow, gap: 1, {
-            FlexCol {
+            FlexCol, gap: 3, {
+                Heading, smooth: false, { "OSUI" }
                 @Transform::new().padding(2, 2);
                 @Style { foreground: None, background: Background::RoundedOutline(0x00ff00) };
                 Div {

src/elements/heading.rs

@@ -0,0 +1,55 @@
+use std::sync::{Arc, Mutex};
+
+use figlet_rs::FIGfont;
+
+use crate::{
+    widget::{Element, Widget},
+    NoRender,
+};
+
+pub struct Heading {
+    pub font: FIGfont,
+    pub smooth: bool,
+    children: Mutex<Vec<Arc<Widget>>>,
+}
+
+impl Heading {
+    pub fn new() -> Heading {
+        Heading {
+            font: FIGfont::standard().unwrap(),
+            smooth: false,
+            children: Mutex::new(Vec::new()),
+        }
+    }
+}
+
+impl Element for Heading {
+    fn render(&mut self, scope: &mut crate::prelude::RenderScope) {
+        let mut s = String::new();
+        for element in self.children.lock().unwrap().iter() {
+            if let Some(e) = element.get_elem().as_any().downcast_ref::<String>() {
+                s += e;
+            }
+        }
+        if let Some(t) = self.font.convert(&s) {
+            scope.draw_text(&if self.smooth {
+                format!("{t}").replace("-", "─").replace("|", "│")
+            } else {
+                format!("{t}")
+            });
+        }
+    }
+
+    fn draw_child(&self, element: &Arc<Widget>) {
+        element.inject(|w| w.component(NoRender));
+        self.children.lock().unwrap().push(element.clone());
+    }
+
+    fn as_any(&self) -> &dyn std::any::Any {
+        self
+    }
+
+    fn as_any_mut(&mut self) -> &mut dyn std::any::Any {
+        self
+    }
+}

src/elements/mod.rs

@@ -1,8 +1,10 @@
 pub mod div;
 pub mod flex;
+pub mod heading;
 
 pub use div::*;
 pub use flex::*;
+pub use heading::*;
 
 use crate::Element;