Make the power module an optional dependency

If power module is not loadable, then all it will affect is the
warning label about the PC being on battery vs. AC power in the print
window.

1 files changed, 10 insertions, 2 deletions

diff --git a/Cura/gui/printWindow.py b/Cura/gui/printWindow.py
index b6a7a4c498..70d5fc8d61 100644
--- a/Cura/gui/printWindow.py
+++ b/Cura/gui/printWindow.py
@@ -2,7 +2,10 @@ __copyright__ = "Copyright (C) 2013 David Braam - Released under terms of the AG
 
 import wx
 from wx.lib.intctrl import IntCtrl
-import power
+try:
+	import power
+except:
+	power = None
 import time
 import sys
 import os
@@ -447,7 +450,10 @@ class printWindowBasic(wx.Frame):
 			style=wx.ALIGN_CENTER)
 		self.powerWarningText.SetBackgroundColour('red')
 		self.powerWarningText.SetForegroundColour('white')
-		self.powerManagement = power.PowerManagement()
+		if power:
+			self.powerManagement = power.PowerManagement()
+		else:
+			self.powerManagement = None
 		self.powerWarningTimer = wx.Timer(self)
 		self.Bind(wx.EVT_TIMER, self.OnPowerWarningChange, self.powerWarningTimer)
 		self.OnPowerWarningChange(None)
@@ -498,6 +504,8 @@ class printWindowBasic(wx.Frame):
 			self._printerConnection.openActiveConnection()
 
 	def OnPowerWarningChange(self, e):
+		if self.powerManagement is None:
+			return
 		type = self.powerManagement.get_providing_power_source_type()
 		if type == power.POWER_TYPE_AC and self.powerWarningText.IsShown():
 			self.powerWarningText.Hide()