Proper offset

src/cli_parser.rs

@@ -1,6 +1,6 @@
 use std::fs;
 
-use clap::{Parser};
+use clap::Parser;
 use clap_verbosity_flag::{InfoLevel, Verbosity};
 use log::info;
 #[derive(Parser, Debug, Clone)]
@@ -20,11 +20,11 @@ pub struct Cli {
     ///Maximum and minimum change to brightness;
     #[clap(short, long, value_parser, default_value_t = 10)]
     pub limit: i16,
-    ///Offset to limit
+    ///Offset to limit. Use as --offset=<Value> 
     /// if limit=10
-    /// offset = 5
+    /// offset = -5
     /// then brightness will vary between -15 to 5;
-    #[clap(short, long, value_parser, default_value_t = 7)]
+    #[clap(long, value_parser, default_value_t = -7)]
     pub offset: i16,
     ///Interval in which brightness values are refreshed
     #[clap(short, long, value_parser, default_value_t = 5)]

src/main.rs

@@ -41,7 +41,9 @@ async fn main() {
         }
         tokio::select! {
             _ = interval.tick() => info!("Current brightness {}",brightness),
-            _ = &mut rx => break,
+            _ = &mut rx => {
+                brightness_dev.set_brightness(-change);
+                break;},
         }
     }
     handle.shutdown();

src/screens.rs

@@ -6,7 +6,7 @@ use crate::cli_parser::get_offset;
 
 pub fn get_value_to_change(lim: u8, brightness: i16) -> i16 {
     debug!("Image brightness {}", brightness);
-    ((-2.0 * lim as f64 / 255_f64) * brightness as f64 + lim as f64 - get_offset() as f64) as i16
+    ((-2.0 * lim as f64 / 255_f64) * brightness as f64 + lim as f64 + get_offset() as f64) as i16
 }
 
 pub fn get_average_brightness(img: DynamicImage) -> i16 {