Fix process communication

[lilass.git] / gui.py

diff --git a/gui.py b/gui.py
index edb9b2b9a8086ceeeddb794986891cb6599df1fb..83099e884b0bbd50cef5700fd26f6da5d4902f96 100644 (file)
--- a/gui.py
+++ b/gui.py
@@ -12,14 +12,32 @@
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU General Public License
-# along with this program (gpl.txt); if not, write to the Free Software
+# along with this program; if not, write to the Free Software
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 
-# This file bstracts GUI stuff away, so that the actual dsl.py does not have to deal with it
+# This file abstracts GUI stuff away, so that the actual dsl.py does not have to deal with it
 import sys
-from PyQt4 import QtGui
-app = QtGui.QApplication(sys.argv)
+
+qt_available = True
+try:
+       from PyQt4 import QtGui
+       from qt_dialogue import PositionSelection
+       app = QtGui.QApplication(sys.argv)
+except Exception, e:
+       import subprocess
+       from zenity_dialogue import run as zenity_run
+       qt_available = False
 
 def error(message):
-       QtGui.QMessageBox.critical(None, 'Fatal error', message)
-       raise Exception(message)
+       '''Displays a fatal error to the user'''
+       if qt_available:
+               QtGui.QMessageBox.critical(None, 'Fatal error', message)
+       else:
+               subprocess.check_call(["zenity", "--error", "--text="+message])
+
+def setup(internalResolutions, externalResolutions):
+       '''Returns a ScreenSetup instance, or None if the user canceled'''
+       if qt_available:
+               return PositionSelection(internalResolutions, externalResolutions).run()
+       else:
+               return zenity_run(internalResolutions, externalResolutions)