@@ -89,6 +89,10 @@ class TestDotWidget(DotWidget):

         Gtk.main_quit()

+    def error_dialog(self, message):

+        sys.stderr.write(message)

+        sys.stderr.write("\n")

+

 def main():

     for arg in sys.argv[1:]:

@@ -1586,12 +1586,7 @@ class DotWidget(Gtk.DrawingArea):

             error = error.decode()

             sys.stderr.write(error + '\n')

         if p.returncode != 0:

-            dialog = Gtk.MessageDialog(type=Gtk.MessageType.ERROR,

-                                       message_format=error,

-                                       buttons=Gtk.ButtonsType.OK)

-            dialog.set_title('Dot Viewer')

-            dialog.run()

-            dialog.destroy()

+            self.error_dialog(error)

             return None

         return xdotcode

@@ -1605,12 +1600,7 @@ class DotWidget(Gtk.DrawingArea):

         try:

             self.set_xdotcode(xdotcode)

         except ParseError as ex:

-            dialog = Gtk.MessageDialog(type=Gtk.MessageType.ERROR,

-                                       message_format=str(ex),

-                                       buttons=Gtk.ButtonsType.OK)

-            dialog.set_title('Dot Viewer')

-            dialog.run()

-            dialog.destroy()

+            self.error_dialog(str(ex))

             return False

         else:

             if filename is None:

@@ -2080,12 +2070,7 @@ class DotWindow(Gtk.Window):

             self.set_dotcode(fp.read(), filename)

             fp.close()

         except IOError as ex:

-            dlg = Gtk.MessageDialog(type=Gtk.MessageType.ERROR,

-                                    message_format=str(ex),

-                                    buttons=Gtk.ButtonsType.OK)

-            dlg.set_title(self.base_title)

-            dlg.run()

-            dlg.destroy()

+            self.error_dialog(str(ex))

     def on_open(self, action):

         chooser = Gtk.FileChooserDialog(title="Open dot File",

@@ -2115,6 +2100,14 @@ class DotWindow(Gtk.Window):

     def on_reload(self, action):

         self.dotwidget.reload()

+    def error_dialog(self, message):

+        dlg = Gtk.MessageDialog(type=Gtk.MessageType.ERROR,

+                                message_format=message,

+                                buttons=Gtk.ButtonsType.OK)

+        dlg.set_title(self.base_title)

+        dlg.run()

+        dlg.destroy()

+

 class OptionParser(optparse.OptionParser):