Gray out graph menu item if graphs aren't available

gui/graphFrame.py

@@ -27,8 +27,10 @@ try:
     mpl.use('wxagg')
     from matplotlib.backends.backend_wxagg import FigureCanvasWxAgg as Canvas
     from matplotlib.figure import Figure
+    enabled = True
 except:
     print "Problems importing matplotlib; continuing without graphs"
+    enabled = False
 
 from gui.graph import Graph
 import service

gui/mainMenuBar.py

@@ -21,6 +21,7 @@ import wx
 import bitmapLoader
 import gui.fittingView
 import gui.mainFrame
+import gui.graphFrame
 
 class MainMenuBar(wx.MenuBar):
     def __init__(self):
@@ -76,6 +77,7 @@ class MainMenuBar(wx.MenuBar):
 
         graphFrameItem = wx.MenuItem(windowMenu, self.graphFrameId, "Graphs\tCTRL+G")
         graphFrameItem.SetBitmap(bitmapLoader.getBitmap("graphs_small", "icons"))
+        graphFrameItem.Enable(gui.graphFrame.enabled)
         windowMenu.AppendItem(graphFrameItem)
 
         #windowMenu.Append(wx.ID_PREFERENCES)