[ocrfeeder] Set parent in PreferencesDialog

[Joaquim Manuel Pereira Rocha <jrocha src gnome org>]

commit 259cfdac65547cd6a68c514b3324d65bbf37b186
Author: Joaquim Rocha <me joaquimrocha com>
Date:   Fri Dec 19 13:20:23 2014 +0000

    Set parent in PreferencesDialog

 src/ocrfeeder/studio/studioBuilder.py   |    5 ++++-
 src/ocrfeeder/studio/widgetPresenter.py |   10 +++++++---
 2 files changed, 11 insertions(+), 4 deletions(-)
---
diff --git a/src/ocrfeeder/studio/studioBuilder.py b/src/ocrfeeder/studio/studioBuilder.py
index 23c04c5..4d597ad 100644
--- a/src/ocrfeeder/studio/studioBuilder.py
+++ b/src/ocrfeeder/studio/studioBuilder.py
@@ -384,7 +384,10 @@ class Studio:
         self.source_images_controler.spellCheck(locale.getdefaultlocale()[0])
 
     def preferences(self, widget = None):
-        preferences_dialog = widgetPresenter.PreferencesDialog(self.configuration_manager, 
self.ocr_engines_manager.ocr_engines)
+        parent = self.main_window.window
+        preferences_dialog = widgetPresenter.PreferencesDialog(parent,
+                                            self.configuration_manager,
+                                            self.ocr_engines_manager.ocr_engines)
         if preferences_dialog.run() == Gtk.ResponseType.ACCEPT:
             preferences_dialog.saveToManager()
             self.source_images_controler.updateFromConfiguration()
diff --git a/src/ocrfeeder/studio/widgetPresenter.py b/src/ocrfeeder/studio/widgetPresenter.py
index eeb23e6..80c6256 100644
--- a/src/ocrfeeder/studio/widgetPresenter.py
+++ b/src/ocrfeeder/studio/widgetPresenter.py
@@ -1301,9 +1301,13 @@ class QueuedEventsProgressDialog(Gtk.Dialog):
 
 class PreferencesDialog(Gtk.Dialog):
 
-    def __init__(self, configuration_manager, ocr_engines):
-        super(PreferencesDialog, self).__init__(_('Preferences'), flags = Gtk.DialogFlags.MODAL, buttons = 
(Gtk.STOCK_CANCEL, Gtk.ResponseType.REJECT,
-                      Gtk.STOCK_OK, Gtk.ResponseType.ACCEPT))
+    def __init__(self, parent, configuration_manager, ocr_engines):
+        super(PreferencesDialog, self).__init__(_('Preferences'), parent=parent,
+                                            flags = Gtk.DialogFlags.MODAL,
+                                            buttons = (Gtk.STOCK_CANCEL,
+                                                       Gtk.ResponseType.REJECT,
+                                                       Gtk.STOCK_OK,
+                                                       Gtk.ResponseType.ACCEPT))
         self.configuration_manager = configuration_manager
         self.ocr_engines = ocr_engines
         self.notebook = Gtk.Notebook()