From 855d67c873a5e9cdabee532fd708d9b6e02cf361 Mon Sep 17 00:00:00 2001
From: "J. Neugebauer" <ngb@helmholtz-bi.de>
Date: Mon, 11 Jul 2022 14:41:45 +0200
Subject: [PATCH] AnimationListener

---
 .../java/schule/ngb/zm/anim/Animation.java    | 26 +++++++++++++++++++
 .../schule/ngb/zm/anim/AnimationListener.java | 11 ++++++++
 2 files changed, 37 insertions(+)
 create mode 100644 src/main/java/schule/ngb/zm/anim/Animation.java
 create mode 100644 src/main/java/schule/ngb/zm/anim/AnimationListener.java

diff --git a/src/main/java/schule/ngb/zm/anim/Animation.java b/src/main/java/schule/ngb/zm/anim/Animation.java
new file mode 100644
index 0000000..793f352
--- /dev/null
+++ b/src/main/java/schule/ngb/zm/anim/Animation.java
@@ -0,0 +1,26 @@
+package schule.ngb.zm.anim;
+
+import schule.ngb.zm.events.EventDispatcher;
+
+public class Animation {
+
+	EventDispatcher<Animation, AnimationListener> eventDispatcher;
+
+	private EventDispatcher<Animation, AnimationListener> initializeEventDispatcher() {
+		if( eventDispatcher == null ) {
+			eventDispatcher = new EventDispatcher<>();
+			eventDispatcher.registerEventType("start", ( a, l ) -> l.animationStarted(a));
+			eventDispatcher.registerEventType("stop", ( a, l ) -> l.animationStopped(a));
+		}
+		return eventDispatcher;
+	}
+
+	public void addListener( AnimationListener listener ) {
+		initializeEventDispatcher().addListener(listener);
+	}
+
+	public void removeListener( AnimationListener listener ) {
+		initializeEventDispatcher().removeListener(listener);
+	}
+
+}
diff --git a/src/main/java/schule/ngb/zm/anim/AnimationListener.java b/src/main/java/schule/ngb/zm/anim/AnimationListener.java
new file mode 100644
index 0000000..13e62da
--- /dev/null
+++ b/src/main/java/schule/ngb/zm/anim/AnimationListener.java
@@ -0,0 +1,11 @@
+package schule.ngb.zm.anim;
+
+import schule.ngb.zm.events.Listener;
+
+public interface AnimationListener extends Listener<Animation> {
+
+	void animationStarted( Animation anim );
+
+	void animationStopped( Animation anim );
+
+}