Add CLI args

- Dumb UI widget that processes nothing
- Accept icon, value, and color as arguments

crates/popcorn/src/args.rs

@@ -0,0 +1,30 @@
+use clap::Parser;
+
+#[derive(Parser, Debug)]
+#[command(name = "popcorn", version, about = "Minimal OSD popup renderer")]
+pub struct CliArgs {
+    #[arg(long = "value")]
+    pub value: Option<u8>,
+
+    #[arg(long = "icon")]
+    pub icon: Option<String>,
+
+    #[arg(long = "color")]
+    pub color: Option<String>,
+}
+
+pub struct OsdArgs {
+    pub value: Option<u8>,
+    pub icon: Option<String>,
+    pub color: Option<String>,
+}
+
+impl From<CliArgs> for OsdArgs {
+    fn from(c: CliArgs) -> Self {
+        Self {
+            value: c.value,
+            icon: c.icon,
+            color: c.color,
+        }
+    }
+}

crates/popcorn/src/main.rs

@@ -1,6 +1,13 @@
+mod args;
 mod show_popup;
 
+use args::{CliArgs, OsdArgs};
+use clap::Parser;
+
 fn main() -> Result<(), Box<dyn std::error::Error>> {
-    show_popup::show_popup()?;
+    let cli = CliArgs::parse();
+    let parsed_args: OsdArgs = cli.into();
+
+    show_popup::show_popup(&parsed_args)?;
     Ok(())
 }

crates/popcorn/src/show_popup.rs

@@ -1,3 +1,4 @@
+use crate::args::OsdArgs;
 use i_slint_backend_winit::{
     Backend,
     winit::{
@@ -13,8 +14,20 @@ fn argb_col(color_hex: u32) -> Color {
     Color::from_argb_encoded(color_hex)
 }
 
+fn parse_hex_color(s: &str) -> Result<Color, String> {
+    let clean = s.trim().trim_start_matches('#');
+
+    let raw = u32::from_str_radix(clean, 16).map_err(|_| "invalid hex color")?;
+
+    if clean.len() == 8 {
+        Ok(Color::from_argb_encoded(raw))
+    } else {
+        Err("color must be 8 hex chars (AARRGGBB)".into())
+    }
+}
+
 /// Set Slint properties from config data  
-fn set_ui_props(ui: &OSDpopup) {
+fn set_ui_props(ui: &OSDpopup, args: &OsdArgs) -> Result<(), Box<dyn std::error::Error>> {
     // Config values
     let popup_width = 200;
     let popup_height = 50;
@@ -24,17 +37,21 @@ fn set_ui_props(ui: &OSDpopup) {
     let window_position_y = 35;
 
     let osd_bg_color = argb_col(0x_67_5f_5f_5f);
-    let fill_color = argb_col(0x_ff_12_7a_9b);
+    let fill_color = if let Some(c) = args.color.as_deref() {
+        parse_hex_color(c)?
+    } else {
+        argb_col(0x_ff_12_7a_9b)
+    };
 
     let value_font_size = 35;
     let value_font_color = argb_col(0x_ff_ff_ff_ff);
     let value_font = "Iosevka Extrabold";
-    let percent_value = 35;
+    let percent_value = i32::from(args.value.unwrap_or(0));
 
     let icon_size = value_font_size;
     let icon_font_color = value_font_color;
     let icon_font = "IosevkaTermSlab Nerd Font Mono";
-    let icon_glyph = "";
+    let icon_glyph = args.icon.as_deref().unwrap_or("");
 
     // Config values -> Slint component properties
     ui.set_popup_width(popup_width);
@@ -66,10 +83,12 @@ fn set_ui_props(ui: &OSDpopup) {
         window_position_x as f32,
         window_position_y as f32,
     ));
+
+    Ok(())
 }
 
 /// Create and show the Window UI
-pub fn show_popup() -> Result<(), Box<dyn std::error::Error>> {
+pub fn show_popup(args: &OsdArgs) -> Result<(), Box<dyn std::error::Error>> {
     // Closure that adjusts winit WindowAttributes before Slint creates the window.
     let window_attrs = |attrs: WindowAttributes| {
         // Mark the X11 window as a Dock so the WM doesn't treat it as a normal window. Window type `Notification` didn't work. Fix later.
@@ -88,7 +107,7 @@ pub fn show_popup() -> Result<(), Box<dyn std::error::Error>> {
     let ui = OSDpopup::new()?;
 
     // Send the data to the UI as properties
-    set_ui_props(&ui);
+    let _ = set_ui_props(&ui, args);
 
     // Run the UI
     ui.run()?;