From 673385edf83ff3d615814ea35a0c0340c2b7237d Mon Sep 17 00:00:00 2001
From: John Schember <john@nachtimwald.com>
Date: Tue, 22 Feb 2011 21:41:58 -0500
Subject: [PATCH] Don't start a search if there is nothing to search for.

---
 src/calibre/gui2/store/search.py | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/calibre/gui2/store/search.py b/src/calibre/gui2/store/search.py
index c8dd818d04..65fde3eac9 100644
--- a/src/calibre/gui2/store/search.py
+++ b/src/calibre/gui2/store/search.py
@@ -48,9 +48,16 @@ class SearchDialog(QDialog, Ui_Dialog):
         self.running_threads = []
         self.results = Queue()
         self.abort = Event()
+        # Clear the visible results.
         self.results_view.model().clear_results()
+        
+        # Don't start a search if there is nothing to search for.
+        query = unicode(self.search_edit.text())
+        if not query.strip():
+            return
+        
         for n in self.store_plugins:
-            t = SearchThread(unicode(self.search_edit.text()), (n, self.store_plugins[n]), self.results, self.abort, self.TIMEOUT)
+            t = SearchThread(query, (n, self.store_plugins[n]), self.results, self.abort, self.TIMEOUT)
             self.running_threads.append(t)
             t.start()
         if self.running_threads: