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Prevent Qt4 from stopping the interpreter #1905

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Merged
merged 5 commits into from
Apr 19, 2013
Merged

Prevent Qt4 from stopping the interpreter #1905

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5c222df
Prevented Qt4 from stopping the interpreter.
Apr 15, 2013
5a07c46
Merge branch 'master' of https://github.com/jschueller/matplotlib
openturns-appveyor Apr 15, 2013
9bed016
Just check DISPLAY env var
openturns-appveyor Apr 16, 2013
1cbce7d
Check for a X11 build of Qt
Apr 17, 2013
48e5bb1
Using a regex to check DISPLAY
Apr 17, 2013
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8 changes: 8 additions & 0 deletions lib/matplotlib/backends/backend_qt4.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
from __future__ import division, print_function
import math
import os
import re
import signal
import sys

Expand Down Expand Up @@ -53,6 +54,13 @@ def _create_qApp():
global qApp
app = QtGui.QApplication.instance()
if app is None:

# check for DISPLAY env variable on X11 build of Qt
if hasattr(QtGui, "QX11Info"):
display = os.environ.get('DISPLAY')
if display is None or not re.search(':\d', display):
raise RuntimeError('Invalid DISPLAY variable')

qApp = QtGui.QApplication( [" "] )
QtCore.QObject.connect( qApp, QtCore.SIGNAL( "lastWindowClosed()" ),
qApp, QtCore.SLOT( "quit()" ) )
Expand Down