diff --git a/utils/resedit/space.py b/utils/resedit/space.py
index 054c9bd..13039a2 100644
--- a/utils/resedit/space.py
+++ b/utils/resedit/space.py
@@ -37,6 +37,16 @@ class Space:
     data.save("planet.xml", self.planets, "Planets", "planet", True,
         { "commodities":"commodity" })
 
+  def __genPlanetTree(self):
+    self.planetTree = {}
+    # Set planets to none.
+    for planet in self.planets.keys():
+      self.planetTree[planet] = None
+    # Set allocated planets.
+    for name, system in self.systems.items():
+      for planet in system["planets"]:
+        self.planetTree[planet] = name
+
   def window(self):
     """
     create the window
@@ -124,7 +134,7 @@ class Space:
     """
     
     # Store the current values.
-    self.__sstore();
+    self.__sstore()
 
     self.cur_system = self.__curSystem()
     if self.cur_system == "":
@@ -159,6 +169,17 @@ class Space:
 
     self.__space_draw()
 
+  def __pupdate(self, wgt=None, event=None):
+    # Store the current values
+    self.__pstore()
+
+    self.__genPlanetTree()
+
+    self.cur_planet = self.__curPlanet()
+    if self.cur_planet == "":
+      return
+    planet = self.planets[self.cur_planet]
+
   def __sstore(self):
     sys_name = self.__swidget("inpName").get_text()
     if sys_name == "":
@@ -220,6 +241,15 @@ class Space:
     else:
       return model.get_value(p, 0)
 
+  def __curPlanet(self):
+    tree = self.__pwidget("trePlanets")
+    model = tree.get_model()
+    try:
+      iter = tree.get_selection().get_selected()[1]
+    except:
+      return ""
+    return model.get_value(iter, 0)
+
   def __done(self, widget=None, data=None):
     """
     Window is done
diff --git a/utils/resedit/space.pyc b/utils/resedit/space.pyc
index ae7f72e..f3fb022 100644
Binary files a/utils/resedit/space.pyc and b/utils/resedit/space.pyc differ