From 073d6c8403aa7c21cfe5a8ad0a8733d11c401100 Mon Sep 17 00:00:00 2001
From: Andreas Preikschat <googol@lavabit.com>
Date: Mon, 11 Apr 2011 16:34:14 +0200
Subject: [PATCH] disable 'next button' if importer is not available

---
 openlp/plugins/songs/forms/songimportform.py | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/openlp/plugins/songs/forms/songimportform.py b/openlp/plugins/songs/forms/songimportform.py
index 6d20c8f41..468d2f341 100644
--- a/openlp/plugins/songs/forms/songimportform.py
+++ b/openlp/plugins/songs/forms/songimportform.py
@@ -66,7 +66,17 @@ class SongImportForm(OpenLPWizard):
         self.formatStack.setCurrentIndex(0)
         QtCore.QObject.connect(self.formatComboBox,
             QtCore.SIGNAL(u'currentIndexChanged(int)'),
-            self.formatStack.setCurrentIndex)
+            self.onCurrentIndexChanged)
+
+    def onCurrentIndexChanged(self, index):
+        """
+        Called when the format combo box's index changed. We have to check if
+        the import is available and accordingly to disable or enable the next
+        button.
+        """
+        self.formatStack.setCurrentIndex(index)
+        next_button = self.button(QtGui.QWizard.NextButton)
+        next_button.setEnabled(SongFormat.get_availability(index))
 
     def customInit(self):
         """