Added ObservableLists.isEmpty() utility method (returns observable bo…

…olean)
webfx-project · May 2, 2024 · 41eb000 · 41eb000
1 parent 23b5550
commit 41eb000
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/webfx-kit/webfx-kit-util/src/main/java/dev/webfx/kit/util/properties/ObservableLists.java b/webfx-kit/webfx-kit-util/src/main/java/dev/webfx/kit/util/properties/ObservableLists.java
@@ -4,6 +4,8 @@
 import dev.webfx.platform.util.Objects;
 import dev.webfx.platform.util.collection.Collections;
 import dev.webfx.platform.util.function.Converter;
+import javafx.beans.property.SimpleBooleanProperty;
+import javafx.beans.value.ObservableBooleanValue;
 import javafx.collections.ListChangeListener;
 import javafx.collections.ObservableList;
 
@@ -64,4 +66,11 @@ public static <T> void runNowAndOnListChange(ListChangeListener<T> listener, Obs
     public static <T> void runOnListChange(ListChangeListener<T> listener, ObservableList<T> list) {
         list.addListener(listener);
     }
+
+    public static <T> ObservableBooleanValue isEmpty(ObservableList<T> list) {
+        SimpleBooleanProperty isEmpty = new SimpleBooleanProperty(list.isEmpty());
+        runOnListChange(c -> isEmpty.setValue(list.isEmpty()), list);
+        return isEmpty;
+    }
+
 }