diff --git a/pykat/__init__.py b/pykat/__init__.py
index 7d2920ba0635ec19cfc8add4e073e4b3a8ec1d79..01a75cd6f05d0f3d4b0ce043f68a3a20ec2c698f 100644
--- a/pykat/__init__.py
+++ b/pykat/__init__.py
@@ -1,4 +1,11 @@
-__version__ = "0.5"
+__version__ = "0.6.1"
+
+# This flag is used to switch on the gui features in pkat at import time
+USE_GUI = False
+
+import pykat.exceptions as pkex
+
+NoGUIException = pkex.BasePyKatException("No PyQt4 module was found so cannot open a GUI")
import finesse
import components
@@ -6,3 +13,7 @@ import detectors
import commands
from pykat.utilities.optics.gaussian_beams import beam_param
+
+
+
+
diff --git a/pykat/components.py b/pykat/components.py
index 5684525deaed2d6cae90e19e2a1977870b887106..37ff73bee7a835e2fe2b23ffaa552c888c7a9855 100644
--- a/pykat/components.py
+++ b/pykat/components.py
@@ -11,9 +11,6 @@ from pykat.node_network import *
from pykat.exceptions import *
import abc
-import pykat.gui.resources
-import pykat.gui.graphics
-from pykat.gui.graphics import *
from pykat.SIfloat import *
from pykat.param import Param, AttrParam
import weakref
@@ -21,6 +18,13 @@ import pykat.exceptions as pkex
next_component_id = 1
+from pykat import USE_GUI, NoGUIException
+
+if USE_GUI:
+ import pykat.gui.resources
+ import pykat.gui.graphics
+ from pykat.gui.graphics import *
+
class NodeGaussSetter(object):
def __init__(self, component, node):
self.__comp = weakref.ref(component)
@@ -149,6 +153,9 @@ class Component(object):
@abc.abstractmethod
def getQGraphicsItem(self):
+ if not USE_GUI:
+ raise NoGUIException
+
return None
@property
@@ -403,6 +410,9 @@ class mirror(AbstractMirrorComponent):
return rtn
def getQGraphicsItem(self):
+ if not USE_GUI:
+ raise NoGUIException
+
if self._svgItem == None:
self._svgItem = pykat.gui.graphics.ComponentQGraphicsItem(":/resources/mirror_flat.svg", self ,[(-4,15,self.nodes[0]), (14,15,self.nodes[1])])
@@ -473,6 +483,9 @@ class beamSplitter(AbstractMirrorComponent):
return rtn
def getQGraphicsItem(self):
+ if not USE_GUI:
+ raise NoGUIException
+
if self._svgItem == None:
# FIXME: make proper SVG component for beam splitter
self._svgItem = pykat.gui.graphics.ComponentQGraphicsItem(":/resources/mirror_flat.svg", self ,[(-4,24,self.nodes[0]), (-4,6,self.nodes[1]), (14,6,self.nodes[2]), (14,24,self.nodes[3])])
@@ -566,6 +579,9 @@ class space(Component):
return rtn
def getQGraphicsItem(self):
+ if not USE_GUI:
+ raise NoGUIException
+
if self._QItem == None:
self._QItem = pykat.gui.graphics.SpaceQGraphicsItem(self)
@@ -696,6 +712,9 @@ class grating(Component):
return rtn
def getQGraphicsItem(self):
+ if not USE_GUI:
+ raise NoGUIException
+
if self._svgItem == None:
self._svgItem = pykat.gui.graphics.SpaceQGraphicsItem(self) # TODO: make SVG graphic for grating
@@ -742,6 +761,9 @@ class isolator(Component):
return rtn
def getQGraphicsItem(self):
+ if not USE_GUI:
+ raise NoGUIException
+
if self._svgItem == None:
self._svgItem = pykat.gui.graphics.ComponentQGraphicsItem(":/resources/isolator.svg", self ,[(-4,15,self.nodes[0]), (14,15,self.nodes[1]), (14,24,self.nodes[2])])
@@ -784,6 +806,9 @@ class lens(Component):
return rtn
def getQGraphicsItem(self):
+ if not USE_GUI:
+ raise NoGUIException
+
if self._svgItem == None:
self._svgItem = pykat.gui.graphics.ComponentQGraphicsItem(":/resources/lens.svg", self ,[(-4,15,self.nodes[0]), (14,15,self.nodes[1])])
@@ -861,6 +886,9 @@ class modulator(Component):
return rtn
def getQGraphicsItem(self):
+ if not USE_GUI:
+ raise NoGUIException
+
if self._svgItem == None:
self._svgItem = pykat.gui.graphics.ComponentQGraphicsItem(":/resources/modulator.svg", self ,[(-4,15,self.nodes[0]), (14,15,self.nodes[1])])
@@ -926,6 +954,9 @@ class laser(Component):
return rtn
def getQGraphicsItem(self):
+ if not USE_GUI:
+ raise NoGUIException
+
if self._svgItem == None:
self._svgItem = pykat.gui.graphics.ComponentQGraphicsItem(":/resources/laser.svg", self, [(65,25,self.nodes[0])])
@@ -989,6 +1020,9 @@ class squeezer(Component):
return rtn
def getQGraphicsItem(self):
+ if not USE_GUI:
+ raise NoGUIException
+
if self._svgItem == None:
self._svgItem = pykat.gui.graphics.ComponentQGraphicsItem(":/resources/laser.svg", self, [(65,25,self.nodes[0])])
diff --git a/pykat/detectors.py b/pykat/detectors.py
index df246f0c9cd5b047e586a4fd3c03e87fba94cf17..9ceb2e4ab5987b81d5070ab948d68d79512b6ff9 100644
--- a/pykat/detectors.py
+++ b/pykat/detectors.py
@@ -5,17 +5,21 @@ Created on Fri Feb 01 0split()9:09:10 2013
@author: Daniel
"""
import exceptions
-import pykat.gui.resources
-
from pykat.utils import *
-from pykat.gui.graphics import *
from pykat.node_network import *
from pykat.param import Param
+
import collections
import pykat.exceptions as pkex
import warnings
import copy
+from pykat import USE_GUI, NoGUIException
+
+if USE_GUI:
+ import pykat.gui.resources
+ from pykat.gui.graphics import *
+
class BaseDetector(object) :
"""
This is a base class for all detectors. Classes Detector1 and Detector2 should be used directly.
@@ -94,6 +98,9 @@ class BaseDetector(object) :
raise NotImplementedError("This function is not implemented")
def getQGraphicsItem(self):
+ if not USE_GUI:
+ raise NoGUIException
+
return None
@property
diff --git a/pykat/finesse.py b/pykat/finesse.py
index 96d7af9fcd00ca1e769c369d7580ea0698972e48..b8c1aeef4486b7d80a73fad7c1e6ad3e6c2c3ba5 100644
--- a/pykat/finesse.py
+++ b/pykat/finesse.py
@@ -46,18 +46,20 @@ from pykat.node_network import NodeNetwork
from pykat.detectors import BaseDetector as Detector
from pykat.components import Component
from pykat.commands import Command, xaxis
-from pykat.gui.gui import pyKatGUI
from pykat.SIfloat import *
from pykat.param import Param, AttrParam
import pykat.exceptions as pkex
-from PyQt4.QtCore import QCoreApplication
-from PyQt4.QtGui import QApplication
+from pykat import USE_GUI, NoGUIException
+
+if USE_GUI:
+ from pykat.gui.gui import pyKatGUI
+ from PyQt4.QtCore import QCoreApplication
+ from PyQt4.QtGui import QApplication
from multiprocessing import Process, Manager
-NO_GUI = False
NO_BLOCK = "NO_BLOCK"
pykat_web = "www.gwoptics.org/pykat"
@@ -1323,8 +1325,8 @@ class kat(object):
return out
def openGUI(self):
- if NO_GUI:
- print "No PyQt4 module was installed so cannot open a GUI"
+ if not USE_GUI:
+ raise NoGUIException
else:
self.app = QCoreApplication.instance()
created = False