crates/dtmm/src/state/data.rs

@@ -78,6 +78,7 @@ pub(crate) struct State {
     pub current_view: View,
     pub mods: Vector<ModInfo>,
     pub selected_mod_index: Option<usize>,
+    pub dirty: bool,
     pub is_deployment_in_progress: bool,
     pub is_reset_in_progress: bool,
     pub is_save_in_progress: bool,
@@ -106,6 +107,7 @@ impl State {
             current_view: View::default(),
             mods: Vector::new(),
             selected_mod_index: None,
+            dirty: false,
             is_deployment_in_progress: false,
             is_reset_in_progress: false,
             is_save_in_progress: false,

crates/dtmm/src/state/delegate.rs

@@ -33,6 +33,8 @@ pub(crate) const ACTION_START_SAVE_SETTINGS: Selector =
 pub(crate) const ACTION_FINISH_SAVE_SETTINGS: Selector =
     Selector::new("dtmm.action.finish-save-settings");
 
+pub(crate) const ACTION_SET_DIRTY: Selector = Selector::new("dtmm.action.set-dirty");
+
 pub(crate) enum AsyncAction {
     DeployMods(State),
     ResetDeployment(State),
@@ -81,6 +83,7 @@ impl AppDelegate<State> for Delegate {
             }
             cmd if cmd.is(ACTION_FINISH_DEPLOY) => {
                 state.is_deployment_in_progress = false;
+                state.dirty = false;
                 Handled::Yes
             }
             cmd if cmd.is(ACTION_START_RESET_DEPLOYMENT) => {
@@ -226,6 +229,10 @@ impl AppDelegate<State> for Delegate {
 
                 Handled::Yes
             }
+            cmd if cmd.is(ACTION_SET_DIRTY) => {
+                state.dirty = true;
+                Handled::Yes
+            }
             cmd => {
                 if cfg!(debug_assertions) {
                     tracing::warn!("Unknown command: {:?}", cmd);

crates/dtmm/src/ui/widget/controller.rs

@@ -1,7 +1,7 @@
 use druid::widget::{Button, Controller, Scroll};
 use druid::{Data, Env, Event, EventCtx, Rect, UpdateCtx, Widget};
 
-use crate::state::{State, ACTION_START_SAVE_SETTINGS};
+use crate::state::{State, ACTION_SET_DIRTY, ACTION_START_SAVE_SETTINGS};
 
 pub struct DisabledButtonController;
 
@@ -57,11 +57,16 @@ impl<T: Data, W: Widget<T>> Controller<T, Scroll<T, W>> for AutoScrollController
     }
 }
 
-/// A controller that submits the command to save settings every time its widget's
+macro_rules! compare_state_fields {
-/// data changes.
+    ($old:ident, $new:ident, $($field:ident),+) => {
-pub struct SaveSettingsController;
+        $($old.$field != $new.$field) || +
+    }
+}
 
-impl<W: Widget<State>> Controller<State, W> for SaveSettingsController {
+/// A controller that tracks state changes for certain fields and submits commands to handle them.
+pub struct DirtyStateController;
+
+impl<W: Widget<State>> Controller<State, W> for DirtyStateController {
     fn update(
         &mut self,
         child: &mut W,
@@ -70,13 +75,14 @@ impl<W: Widget<State>> Controller<State, W> for SaveSettingsController {
         data: &State,
         env: &Env,
     ) {
-        // Only filter for the values that actually go into the settings file.
+        if compare_state_fields!(old_data, data, mods, game_dir, data_dir) {
-        if old_data.mods != data.mods
-            || old_data.game_dir != data.game_dir
-            || old_data.data_dir != data.data_dir
-        {
             ctx.submit_command(ACTION_START_SAVE_SETTINGS);
         }
+
+        if compare_state_fields!(old_data, data, mods, game_dir) {
+            ctx.submit_command(ACTION_SET_DIRTY);
+        }
+
         child.update(ctx, old_data, data, env)
     }
 }

crates/dtmm/src/ui/window/main.rs

@@ -15,7 +15,7 @@ use crate::state::{
     ACTION_START_RESET_DEPLOYMENT,
 };
 use crate::ui::theme;
-use crate::ui::widget::controller::{AutoScrollController, SaveSettingsController};
+use crate::ui::widget::controller::{AutoScrollController, DirtyStateController};
 use crate::ui::widget::PathBufFormatter;
 
 const TITLE: &str = "Darktide Mod Manager";
@@ -38,11 +38,20 @@ fn build_top_bar() -> impl Widget<State> {
         state.current_view = View::Settings;
     });
 
-    let deploy_button = Button::new("Deploy Mods")
+    let deploy_button = {
+        Button::dynamic(|state: &State, _| {
+            let mut s = String::new();
+            if state.dirty {
+                s.push_str("! ");
+            }
+            s.push_str("Deploy Mods");
+            s
+        })
         .on_click(|ctx, _state: &mut State, _env| {
             ctx.submit_command(ACTION_START_DEPLOY);
         })
-        .disabled_if(|data, _| data.is_deployment_in_progress || data.is_reset_in_progress);
+        .disabled_if(|data, _| data.is_deployment_in_progress || data.is_reset_in_progress)
+    };
 
     let reset_button = Button::new("Reset Game")
         .on_click(|ctx, _state: &mut State, _env| {
@@ -308,5 +317,5 @@ fn build_window() -> impl Widget<State> {
         .with_child(build_top_bar())
         .with_flex_child(build_main(), 1.0)
         .with_child(build_log_view())
-        .controller(SaveSettingsController)
+        .controller(DirtyStateController)
 }