diff --git a/widget/src/main.rs b/widget/src/main.rs
index f4752c4..4d29fc1 100644
--- a/widget/src/main.rs
+++ b/widget/src/main.rs
@@ -1,10 +1,9 @@
 use owm_rs::free_api_v25::current::WeatherResponse;
 use owm_widg_config::config::Config;
 use owm_widg_config::general::ApiVersion;
-use slint::SharedString;
 use std::fs;
 
-slint::include_modules!();
+mod show_popup;
 
 fn main() -> Result<(), Box<dyn std::error::Error>> {
     let path = dirs::config_dir()
@@ -46,39 +45,19 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
                 "standard" => 'K',
                 _ => '?',
             };
-
-            // Create and show the UI
-            let ui = MainWindow::new()?;
-            ui.set_city(SharedString::from(city));
-            ui.set_country(SharedString::from(country));
-            ui.set_weather_main(SharedString::from(weather_main));
-            ui.set_weather_description(SharedString::from(weather_description));
-            ui.set_weather_icon(SharedString::from(icon_to_nerd_font(&icon)));
-            ui.set_temperature(SharedString::from(temperature));
-            ui.set_unit(SharedString::from(unit));
-
-            ui.run()?;
+            
+            show_popup::show_popup(
+                city,
+                country,
+                weather_main,
+                weather_description,
+                icon,
+                temperature,
+                unit,
+            )?;
         }
         other => return Err(format!("Unsupported api_version: {other:?}").into()),
     }
 
     Ok(())
 }
-
-/// Convert OWM icon codes (e.g. "01d", "09n") to Nerd Font weather glyphs.
-fn icon_to_nerd_font(code: &str) -> String {
-    match code {
-        "01d" => "",         // clear day
-        "01n" => "",         // clear night
-        "02d" | "02n" => "", // few clouds
-        "03d" | "03n" => "", // scattered clouds
-        "04d" | "04n" => "", // broken clouds
-        "09d" | "09n" => "", // shower rain
-        "10d" | "10n" => "", // rain
-        "11d" | "11n" => "", // thunderstorm
-        "13d" | "13n" => "", // snow
-        "50d" | "50n" => "", // mist
-        _ => "",
-    }
-    .into()
-}
diff --git a/widget/src/show_popup.rs b/widget/src/show_popup.rs
new file mode 100644
index 0000000..3c3e50a
--- /dev/null
+++ b/widget/src/show_popup.rs
@@ -0,0 +1,44 @@
+use slint::SharedString;
+
+slint::include_modules!();
+
+/// Create and show the UI window populated with weather data.
+pub fn show_popup(
+    city: String,
+    country: String,
+    weather_main: String,
+    weather_description: String,
+    icon_code: String,
+    temperature: String,
+    unit: char,
+) -> Result<(), Box<dyn std::error::Error>> {
+    let ui = MainWindow::new()?;
+    ui.set_city(SharedString::from(city));
+    ui.set_country(SharedString::from(country));
+    ui.set_weather_main(SharedString::from(weather_main));
+    ui.set_weather_description(SharedString::from(weather_description));
+    ui.set_weather_icon(SharedString::from(icon_to_nerd_font(&icon_code)));
+    ui.set_temperature(SharedString::from(temperature));
+    ui.set_unit(SharedString::from(unit));
+
+    ui.run()?;
+    Ok(())
+}
+
+/// Convert OWM icon codes (e.g. "01d", "09n") to Nerd Font weather glyphs.
+fn icon_to_nerd_font(code: &str) -> String {
+    match code {
+        "01d" => "",         // clear day
+        "01n" => "",         // clear night
+        "02d" | "02n" => "", // few clouds
+        "03d" | "03n" => "", // scattered clouds
+        "04d" | "04n" => "", // broken clouds
+        "09d" | "09n" => "", // shower rain
+        "10d" | "10n" => "", // rain
+        "11d" | "11n" => "", // thunderstorm
+        "13d" | "13n" => "", // snow
+        "50d" | "50n" => "", // mist
+        _ => "",
+    }
+    .into()
+}