Simple delegate for properties

src/main/java/ru/touchin/roboswag/components/extensions/Delegates.kt

@@ -0,0 +1,16 @@
+package ru.touchin.roboswag.components.extensions
+
+import kotlin.properties.Delegates
+import kotlin.properties.ObservableProperty
+import kotlin.properties.ReadWriteProperty
+import kotlin.reflect.KProperty
+
+/**
+ * Simple observable delegate only for notification of new value.
+ */
+inline fun <T> Delegates.observable(
+        initialValue: T,
+        crossinline onChange: (newValue: T) -> Unit
+): ReadWriteProperty<Any?, T> = object : ObservableProperty<T>(initialValue) {
+    override fun afterChange(property: KProperty<*>, oldValue: T, newValue: T) = onChange(newValue)
+}