add error dialog box when GUI is started

Cargo.toml

@@ -1,12 +1,13 @@
 [package]
 name = "wordle_finder"
-version = "2.2.3"
+version = "2.2.4"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
 clap = "3.0.14"
+native-dialog = { version = "0.6.3", features = ["windows_dpi_awareness", "windows_visual_styles"] }
 regex = "1.5.4"
 serde = { version = "1.0.136", features = ["derive"] }
 serde_json = "1.0.79"

README.md

@@ -4,10 +4,7 @@ Rust program to help find the wordle word
 ## Use
 This program can be used from a terminal, run `./wordle_finder --help` for more info. If you'd like to use the GUI frontend, you can launch it by running `./wordle_finder -g` in a terminal or opening the binary from a file explorer.
 
-<details>
-  <summary>GUI Frontend for version 2.0.0</summary>
-<img src="https://user-images.githubusercontent.com/58576759/154787824-4358b931-f161-4ecb-9859-ba21066512c2.png" alt="GUI" />
-</details>
+![GUI Example](assets/main_ui.png)
 
 ## Downloading
 I provide pre-built binaries on the releases page. I do not test the Windows binary, but it may work.

src/main.rs

@@ -16,6 +16,7 @@
 
 use clap::{Arg, Command};
 use regex::Regex;
+use native_dialog::{MessageDialog, MessageType};
 
 mod gui;
 mod utils;
@@ -60,7 +61,22 @@ fn main() {
     // this should launch the GUI if run from a file explorer
     if matches.is_present("gui") || std::env::args().len() == 1 {
         match gui::run_gui() {
-            Err(error) => panic!("Error when running GUI: {:?}", error),
+            Err(error) => {
+                let result = MessageDialog::new()
+                    .set_title("Error")
+                    .set_text(&format!("{:?}", &error))
+                    .set_type(MessageType::Error)
+                    .show_alert();
+
+                match result {
+                    Err(second_error) => {
+                        eprintln!("Error when launching MessageDialog: {}", second_error);
+                        panic!("Error when running GUI: {:?}", error);
+                    },
+                    _ => ()
+                }
+
+            },
             _ => (),
         };
         std::process::exit(0);