From fe106e7afab311dcc42b26fe7849213c918ad9d0 Mon Sep 17 00:00:00 2001
From: Matti Tahvonen <matti.tahvonen@itmill.com>
Date: Mon, 30 Nov 2009 10:19:44 +0000
Subject: [PATCH] fixes #3782, a better exception when trying to add Window via
 addComponent

svn changeset:10104/svn branch:6.2
---
 src/com/vaadin/ui/Window.java | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/com/vaadin/ui/Window.java b/src/com/vaadin/ui/Window.java
index d234f7aaac..989ea09903 100644
--- a/src/com/vaadin/ui/Window.java
+++ b/src/com/vaadin/ui/Window.java
@@ -185,6 +185,16 @@ public class Window extends Panel implements URIHandler, ParameterHandler {
         setSizeUndefined();
     }
 
+    @Override
+    public void addComponent(Component c) {
+        if (c instanceof Window) {
+            throw new IllegalArgumentException(
+                    "Window cannot be added to another via addComponent. "
+                            + "Use addWindow(Window) instead.");
+        }
+        super.addComponent(c);
+    }
+
     /**
      * Gets the terminal type.
      * 
-- 
2.39.5