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Prevent Qt4 from stopping the interpreter #1905

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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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9 changes: 9 additions & 0 deletions lib/matplotlib/backends/backend_qt4.py
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Expand Up @@ -23,6 +23,8 @@

from qt4_compat import QtCore, QtGui, _getSaveFileName, __version__

import subprocess
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Minor point -- this can probably be removed since it's no longer being used.


backend_version = __version__
def fn_name(): return sys._getframe(1).f_code.co_name

Expand Down Expand Up @@ -53,6 +55,13 @@ def _create_qApp():
global qApp
app = QtGui.QApplication.instance()
if app is None:

# check for DISPLAY env variable
if sys.platform.startswith('linux'):
display = os.environ.get('DISPLAY')
if (display is None) or (not ':' in display.strip()):
raise RuntimeError('Invalid DISPLAY variable')

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