diff options
| -rw-r--r-- | src/main/java/io/github/cottonmc/cotton/gui/widget/data/ObservableProperty.java | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/main/java/io/github/cottonmc/cotton/gui/widget/data/ObservableProperty.java b/src/main/java/io/github/cottonmc/cotton/gui/widget/data/ObservableProperty.java index 3b0205e..7111b25 100644 --- a/src/main/java/io/github/cottonmc/cotton/gui/widget/data/ObservableProperty.java +++ b/src/main/java/io/github/cottonmc/cotton/gui/widget/data/ObservableProperty.java @@ -130,11 +130,23 @@ public final class ObservableProperty<T> implements Supplier<T> { return this; } + /** + * Adds a change listener to this observable property. + * + * @param listener the added listener + */ public void addListener(ChangeListener<? super T> listener) { + Objects.requireNonNull(listener); listeners.add(listener); } + /** + * Removes a change listener from this observable property if present. + * + * @param listener the removed listener + */ public void removeListener(ChangeListener<? super T> listener) { + Objects.requireNonNull(listener); listeners.remove(listener); } |