diff --git a/client.cpp b/client.cpp
index 775043aab7..0c9428c767 100644
--- a/client.cpp
+++ b/client.cpp
@@ -2405,6 +2405,11 @@ void Client::updateFirstInTabBox()
         XFree(data);
 }
 
+bool Client::isClient() const
+{
+    return true;
+}
+
 } // namespace
 
 #include "client.moc"
diff --git a/client.h b/client.h
index f8be3cb16e..65f3ebc301 100644
--- a/client.h
+++ b/client.h
@@ -579,6 +579,7 @@ public:
 
     //sets whether the client should be treated as a SessionInteract window
     void setSessionInteract(bool needed);
+    virtual bool isClient() const;
 
 public slots:
     void closeWindow();
diff --git a/deleted.cpp b/deleted.cpp
index e166bf1039..762ea26928 100644
--- a/deleted.cpp
+++ b/deleted.cpp
@@ -161,6 +161,11 @@ QRect Deleted::transparentRect() const
     return transparent_rect;
 }
 
+bool Deleted::isDeleted() const
+{
+    return true;
+}
+
 } // namespace
 
 #include "deleted.moc"
diff --git a/deleted.h b/deleted.h
index 81012973e6..e52b342e66 100644
--- a/deleted.h
+++ b/deleted.h
@@ -40,6 +40,7 @@ public:
     virtual QPoint clientPos() const;
     virtual QSize clientSize() const;
     virtual QRect transparentRect() const;
+    virtual bool isDeleted() const;
     const QPixmap *topDecoPixmap() const {
         return &decorationPixmapTop;
     }
diff --git a/effects.cpp b/effects.cpp
index 633e2b07d5..5ff27763a5 100644
--- a/effects.cpp
+++ b/effects.cpp
@@ -1378,11 +1378,6 @@ const EffectWindowGroup* EffectWindowImpl::group() const
     return NULL; // TODO
 }
 
-bool EffectWindowImpl::isDeleted() const
-{
-    return (dynamic_cast<Deleted*>(toplevel) != 0);
-}
-
 void EffectWindowImpl::refWindow()
 {
     if (Deleted* d = dynamic_cast< Deleted* >(toplevel))
@@ -1434,11 +1429,6 @@ void EffectWindowImpl::deleteProperty(long int atom) const
     deleteWindowProperty(window()->window(), atom);
 }
 
-bool EffectWindowImpl::isManaged() const
-{
-    return dynamic_cast< const Client* >(toplevel) != NULL;
-}
-
 EffectWindow* EffectWindowImpl::findModal()
 {
     if (Client* c = dynamic_cast< Client* >(toplevel)) {
diff --git a/effects.h b/effects.h
index 0d63c245a6..bac6e408e8 100644
--- a/effects.h
+++ b/effects.h
@@ -240,7 +240,6 @@ public:
 
     virtual void refWindow();
     virtual void unrefWindow();
-    virtual bool isDeleted() const;
 
     virtual const EffectWindowGroup* group() const;
 
@@ -250,7 +249,6 @@ public:
     virtual QByteArray readProperty(long atom, long type, int format) const;
     virtual void deleteProperty(long atom) const;
 
-    virtual bool isManaged() const; // managed or override-redirect
     virtual EffectWindow* findModal();
     virtual EffectWindowList mainWindows() const;
 
diff --git a/libkwineffects/kwineffects.cpp b/libkwineffects/kwineffects.cpp
index ca692edbb2..412202a9bd 100644
--- a/libkwineffects/kwineffects.cpp
+++ b/libkwineffects/kwineffects.cpp
@@ -323,6 +323,8 @@ WINDOW_HELPER(bool, isTooltip, "tooltip")
 WINDOW_HELPER(bool, isNotification, "notification")
 WINDOW_HELPER(bool, isComboBox, "comboBox")
 WINDOW_HELPER(bool, isDNDIcon, "dndIcon")
+WINDOW_HELPER(bool, isManaged, "managed")
+WINDOW_HELPER(bool, isDeleted, "deleted")
 WINDOW_HELPER(QString, windowRole, "windowRole")
 
 QString EffectWindow::windowClass() const
diff --git a/libkwineffects/kwineffects.h b/libkwineffects/kwineffects.h
index 45e759e84b..b350494996 100644
--- a/libkwineffects/kwineffects.h
+++ b/libkwineffects/kwineffects.h
@@ -1099,7 +1099,7 @@ public:
 
     virtual void refWindow() = 0;
     virtual void unrefWindow() = 0;
-    virtual bool isDeleted() const = 0;
+    bool isDeleted() const;
 
     bool isMinimized() const;
     double opacity() const;
@@ -1244,7 +1244,7 @@ public:
      * Returns whether the window is managed by KWin (it has control over its placement and other
      * aspects, as opposed to override-redirect windows that are entirely handled by the application).
      */
-    virtual bool isManaged() const = 0; // whether it's managed or override-redirect
+    bool isManaged() const; // whether it's managed or override-redirect
     /**
      * Returns whether or not the window can accept keyboard focus.
      */
diff --git a/toplevel.cpp b/toplevel.cpp
index 7cbbd970a6..8535f12662 100644
--- a/toplevel.cpp
+++ b/toplevel.cpp
@@ -446,6 +446,16 @@ void Toplevel::getWmOpaqueRegion()
     opaque_region = new_opaque_region;
 }
 
+bool Toplevel::isClient() const
+{
+    return false;
+}
+
+bool Toplevel::isDeleted() const
+{
+    return false;
+}
+
 } // namespace
 
 #include "toplevel.moc"
diff --git a/toplevel.h b/toplevel.h
index 8e6ea87c9c..183dee49c5 100644
--- a/toplevel.h
+++ b/toplevel.h
@@ -144,6 +144,15 @@ class Toplevel
      */
     Q_PROPERTY(int windowType READ windowType)
     Q_PROPERTY(QStringList activities READ activities)
+    /**
+     * Whether this Toplevel is managed by KWin (it has control over its placement and other
+     * aspects, as opposed to override-redirect windows that are entirely handled by the application).
+     **/
+    Q_PROPERTY(bool managed READ isClient CONSTANT)
+    /**
+     * Whether this Toplevel represents an already deleted window and only kept for the compositor for animations.
+     **/
+    Q_PROPERTY(bool deleted READ isDeleted CONSTANT)
 public:
     Toplevel(Workspace *ws);
     Window frameId() const;
@@ -165,6 +174,8 @@ public:
     virtual QRect decorationRect() const; // rect including the decoration shadows
     virtual QRect transparentRect() const = 0;
     virtual QRegion decorationPendingRegion() const; // decoration region that needs to be repainted
+    virtual bool isClient() const;
+    virtual bool isDeleted() const;
 
     // prefer isXXX() instead
     // 0 for supported types means default for managed/unmanaged types