2 files changed, 24 insertions, 2 deletions
diff --git a/src/main/java/dev/isxander/yacl/api/Option.java b/src/main/java/dev/isxander/yacl/api/Option.java
index b17743e..1df90a8 100644
--- a/src/main/java/dev/isxander/yacl/api/Option.java
+++ b/src/main/java/dev/isxander/yacl/api/Option.java
@@ -123,6 +123,8 @@ public interface Option<T> {
 
         private boolean available = true;
 
+        private boolean instant = false;
+
         private final Set<OptionFlag> flags = new HashSet<>();
 
         private final Class<T> typeClass;
@@ -250,6 +252,17 @@ public interface Option<T> {
         }
 
         /**
+         * Instantly invokes the binder's setter when modified in the GUI.
+         * Prevents the user from undoing the change
+         * <p>
+         * Does not support {@link Option#flags()}!
+         */
+        public Builder<T> instant(boolean instant) {
+            this.instant = instant;
+            return this;
+        }
+
+        /**
          * Dictates whether the option should require a restart.
          * {@link Option#requiresRestart()}
          */
@@ -264,6 +277,7 @@ public interface Option<T> {
         public Option<T> build() {
             Validate.notNull(controlGetter, "`control` must not be null when building `Option`");
             Validate.notNull(binding, "`binding` must not be null when building `Option`");
+            Validate.isTrue(!instant || flags.isEmpty(), "instant application does not support option flags");
 
             Function<T, Text> concatenatedTooltipGetter = value -> {
                 MutableText concatenatedTooltip = Text.empty();
@@ -278,7 +292,11 @@ public interface Option<T> {
                 return concatenatedTooltip;
             };
 
-            return new OptionImpl<>(name, concatenatedTooltipGetter, controlGetter, binding, available, ImmutableSet.copyOf(flags), typeClass);
+            OptionImpl<T> option = new OptionImpl<>(name, concatenatedTooltipGetter, controlGetter, binding, available, ImmutableSet.copyOf(flags), typeClass);
+            if (instant) {
+                option.addListener((opt, pendingValue) -> opt.applyValue());
+            }
+            return option;
         }
     }
 }
diff --git a/src/testmod/java/dev/isxander/yacl/test/ModMenuIntegration.java b/src/testmod/java/dev/isxander/yacl/test/ModMenuIntegration.java
index 944246d..aca966b 100644
--- a/src/testmod/java/dev/isxander/yacl/test/ModMenuIntegration.java
+++ b/src/testmod/java/dev/isxander/yacl/test/ModMenuIntegration.java
@@ -96,10 +96,14 @@ public class ModMenuIntegration implements ModMenuApi {
                                 .name(Text.of("Slider Controllers"))
                                 .option(Option.createBuilder(int.class)
                                         .name(Text.of("Int Slider that is cut off because the slider"))
+                                        .instant(true)
                                         .binding(
                                                 0,
                                                 () -> TestSettings.intSlider,
-                                                (value) -> TestSettings.intSlider = value
+                                                (value) -> {
+                                                    TestSettings.intSlider = value;
+                                                    System.out.println("Set int value!");
+                                                }
                                         )
                                         .controller(opt -> new IntegerSliderController(opt, 0, 3, 1))
                                         .build())