Fixes T45: Sleep function fixed so window can close

diff --git a/Cura/gui/printWindow.py b/Cura/gui/printWindow.py
index a9c79dd38abcc721065862a0cef46b5ae98f93a0..434d2c0c142c5601d3d7b39529dda4a2a63825ed 100644 (file)
--- a/Cura/gui/printWindow.py
+++ b/Cura/gui/printWindow.py
@@ -37,15 +37,17 @@ elif sys.platform.startswith('darwin'):
        frameworkPath=objc.pathForFramework("/System/Library/Frameworks/IOKit.framework"),
        globals=globals())
        objc.loadBundleFunctions(bundle, globals(), [("IOPMAssertionCreateWithName", b"i@I@o^I")])
+       objc.loadBundleFunctions(bundle, globals(), [("IOPMAssertionRelease", b"iI")])
        def preventComputerFromSleeping(frame, prevent):
                if prevent:
                        success, preventComputerFromSleeping.assertionID = IOPMAssertionCreateWithName(kIOPMAssertionTypeNoDisplaySleep, kIOPMAssertionLevelOn, "Cura is printing", None)
                        if success != kIOReturnSuccess:
                                preventComputerFromSleeping.assertionID = None
                else:
-                       if preventComputerFromSleeping.assertionID is not None:
-                               IOPMAssertionRelease(preventComputerFromSleeping.assertionID)
-                               preventComputerFromSleeping.assertionID = None
+                       if hasattr(preventComputerFromSleeping, "assertionID"):
+                               if preventComputerFromSleeping.assertionID is not None:
+                                       IOPMAssertionRelease(preventComputerFromSleeping.assertionID)
+                                       preventComputerFromSleeping.assertionID = None
 else:
        def preventComputerFromSleeping(frame, prevent):
                if os.path.isfile("/usr/bin/xdg-screensaver"):