diff --git a/src/mcedit2/util/screen.py b/src/mcedit2/util/screen.py
new file mode 100644
index 0000000..1decdc3
--- /dev/null
+++ b/src/mcedit2/util/screen.py
@@ -0,0 +1,20 @@
+"""
+    screen
+"""
+from __future__ import absolute_import, division, print_function
+import logging
+from PySide import QtGui, QtCore
+
+log = logging.getLogger(__name__)
+
+def centerWidgetInScreen(widget):
+    screen = QtGui.QApplication.desktop().availableGeometry()
+    w = screen.width()
+    h = screen.height()
+    margin = 0.125
+    r = QtCore.QRect(screen.x() + margin * w,
+                     screen.y() + margin * h,
+                     w - w * 2 * margin,
+                     h - h * 2 * margin)
+
+    widget.setGeometry(r)
diff --git a/src/mcedit2/worldlist.py b/src/mcedit2/worldlist.py
index f6ced06..1359070 100644
--- a/src/mcedit2/worldlist.py
+++ b/src/mcedit2/worldlist.py
@@ -10,6 +10,7 @@ from mcedit2.rendering.textureatlas import TextureAtlas
 from mcedit2.util import profiler, minecraftinstall
 from mcedit2.util.load_ui import load_ui
 from mcedit2.util.minecraftinstall import MinecraftInstallsDialog
+from mcedit2.util.screen import centerWidgetInScreen
 from mcedit2.util.worldloader import LoaderTimer
 
 from mcedit2.widgets.layout import Column, Row, setWidgetError
@@ -127,16 +128,7 @@ class WorldListWidget(QtGui.QDialog):
         self.backupButton.setEnabled(False)
         self.configureButton.clicked.connect(self.configureClicked)
 
-        screen = QtGui.QApplication.desktop().availableGeometry()
-        w = screen.width()
-        h = screen.height()
-        margin = 0.125
-        r = QtCore.QRect(screen.x() + margin * w,
-                         screen.y() + margin * h,
-                         w - w * 2 * margin,
-                         h - h * 2 * margin)
-
-        self.setGeometry(r)
+        centerWidgetInScreen(self)
 
         self.loadTimer = LoaderTimer(interval=0, timeout=self.loadTimerFired)
         self.loadTimer.start()