* Icon inherits from Referenceable in Icon-O-Matic mode

* new listeners receive an AreaInvalidated notification


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18564 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/libs/icon/Icon.cpp

@@ -163,8 +163,12 @@ Icon::ObjectChanged(const Observable* object)
 bool
 Icon::AddListener(IconListener* listener)
 {
-	if (listener && !fListeners.HasItem((void*)listener))
-		return fListeners.AddItem((void*)listener);
+	if (listener && !fListeners.HasItem((void*)listener)) {
+		if (fListeners.AddItem((void*)listener)) {
+			listener->AreaInvalidated(BRect(0, 0, 63, 63));
+			return true;
+		}
+	}
 	return false;
 }
 

src/libs/icon/Icon.h

@@ -13,6 +13,7 @@
 #include <List.h>
 
 # include "Observer.h"
+# include "Referenceable.h"
 #else
 # include <SupportDefs.h>
 #endif
@@ -34,7 +35,8 @@ class IconListener {
 
 #ifdef ICON_O_MATIC
 class Icon : public ShapeContainerListener,
-			 public Observer {
+			 public Observer,
+			 public Referenceable {
 #else
 class Icon {
 #endif