[ocrfeeder] Update the box editor's OCR controls sensitiveness

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

commit 4107fe64e32ac6eb260e01518e2db11a4d655f7c
Author: Joaquim Rocha <jrocha redhat com>
Date:   Wed Jul 30 23:59:07 2014 +0200

    Update the box editor's OCR controls sensitiveness
    
    The sensitiveness is updated according to the existence of OCR
    engines so the user is not able to perform the OCR recognition
    when there are no engines configured.

 src/ocrfeeder/studio/widgetPresenter.py |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/src/ocrfeeder/studio/widgetPresenter.py b/src/ocrfeeder/studio/widgetPresenter.py
index 47e738e..eeb23e6 100644
--- a/src/ocrfeeder/studio/widgetPresenter.py
+++ b/src/ocrfeeder/studio/widgetPresenter.py
@@ -688,6 +688,11 @@ class BoxEditor(Gtk.ScrolledWindow):
             self.ocr_combo_box.append_text(engine)
         if engines_list:
             self.ocr_combo_box.set_active(0)
+            self.ocr_combo_box.set_sensitive(True)
+            self.perform_ocr_button.set_sensitive(True)
+        else:
+            self.ocr_combo_box.set_sensitive(False)
+            self.perform_ocr_button.set_sensitive(False)
 
     def setType(self, new_type):
         if new_type == TEXT_TYPE: