Adding some nice things

src/main.rs

@@ -1,5 +1,6 @@
 use config::{default_save_filename, load_config, save_config, Config};
 use eframe::egui;
+use eframe::egui::Color32;
 use infos::{Difficulty, LauncherInfo, WadInfo};
 use native_dialog::{MessageDialog, MessageType};
 use std::path::PathBuf;
@@ -86,33 +87,27 @@ impl RustDoomLauncher {
     }
 
     fn get_launcher_and_command(&self, show_dialogs: bool) -> Result<(&str, Vec<&str>), MyErrors> {
-        let launcher = match self.selected_launcher {
-            Some(l) => self.all_launchers.get(l).unwrap(),
-            None => {
-                if show_dialogs {
-                    MessageDialog::new()
-                        .set_type(MessageType::Error)
-                        .set_title("I can't let you do that")
-                        .set_text("You didn't pick a launcher!\nPlease do that")
-                        .show_alert()
-                        .unwrap();
-                }
-                return Err(MyErrors::NoLauncher);
+        let (launcher, iwad) = match self.launcher_and_iwad() {
+            Err(e) => {
+                let text = match e {
+                    MyErrors::NoIwad => {
+                        "an IWAD"
+                    },
+                    MyErrors::NoLauncher => {
+                        "a launcher"
                     }
                 };
-        let iwad = match self.selected_iwad {
-            Some(i) => self.all_iwads.get(i).unwrap(),
-            None => {
                 if show_dialogs {
                     MessageDialog::new()
                         .set_type(MessageType::Error)
                         .set_title("I can't let you do that")
-                        .set_text("You didn't pick an IWAD!\nPlease do that")
+                        .set_text(&format!("You didn't pick {}!\nPlease do that", text))
                         .show_alert()
                         .unwrap();
                 }
-                return Err(MyErrors::NoIwad);
-            }
+                return Err(e);
+            },
+            Ok((l, i)) => (l, i)
         };
         let mut command = vec!["-iwad", iwad.path.to_str().unwrap()];
         for pwad_index in &self.selected_pwads {
@@ -156,6 +151,22 @@ impl RustDoomLauncher {
             Command::new(launcher).args(command).spawn();
         }
     }
+
+    fn launcher_and_iwad(&self) -> Result<(&LauncherInfo,& WadInfo), MyErrors> {
+        let launcher = match self.selected_launcher {
+            Some(l) => self.all_launchers.get(l).unwrap(),
+            None => {
+                return Err(MyErrors::NoLauncher);
+            }
+        };
+        let iwad = match self.selected_iwad {
+            Some(i) => self.all_iwads.get(i).unwrap(),
+            None => {
+                return Err(MyErrors::NoIwad);
+            }
+        };
+        Ok((launcher, iwad))
+    }
 }
 
 impl eframe::App for RustDoomLauncher {
@@ -177,7 +188,11 @@ impl eframe::App for RustDoomLauncher {
         egui::containers::panel::CentralPanel::default().show(ctx, |ui| {
             ui.horizontal(|ui| {
                 ui.heading("RustDoomLauncher");
-                if ui.button("PLAY SOME DOOM!").clicked() {
+                let button = match self.launcher_and_iwad() {
+                    Err(_) => egui::Button::new("PLAY SOME DOOM!"),
+                    Ok((_, _)) => egui::Button::new("PLAY SOME DOOM!").fill(Color32::DARK_GREEN)
+                };
+                if ui.add(button).clicked() {
                     self.launch_doom();
                 }
             });
@@ -217,7 +232,7 @@ impl eframe::App for RustDoomLauncher {
                 ui.separator();
                 ui.vertical(|ui| {
                     ui.set_min_width(100.0);
-                    ui.label("PWADs and Mods");
+                    ui.label("PWADs");
                     for (pos, pwad) in self.all_pwads.iter().enumerate() {
                         if ui
                             .add(egui::SelectableLabel::new(
@@ -267,6 +282,7 @@ impl eframe::App for RustDoomLauncher {
                             });
                         }
                     }
+                    // TODO - add Mod button - or probably just rethink the whole thing
                     if ui.button("Add PWAD or Mod").clicked() {
                         if let Some(path) = rfd::FileDialog::new().pick_file() {
                             self.all_pwads.push(WadInfo {