Searching: When search as you type is active, do not change automatically change focus to the book list when searching, unless the user presses Enter. Fixes #1463042 [The focus issue of the search box after checked the Search as you type option](https://bugs.launchpad.net/calibre/+bug/1463042)

src/calibre/gui2/library/views.py

@@ -1054,7 +1054,7 @@ class BooksView(QTableView):  # {{{
             self.select_rows([id_to_select], using_ids=True)
         elif self._model.highlight_only:
             self.clearSelection()
-        if self.isVisible():
+        if self.isVisible() and getattr(txt, 'as_you_type', False) is not True:
             self.setFocus(Qt.OtherFocusReason)
 
     def connect_to_search_box(self, sb, search_done):

src/calibre/gui2/search_box.py

@@ -19,6 +19,13 @@ from calibre.gui2.dialogs.confirm_delete import confirm
 from calibre.gui2.dialogs.saved_search_editor import SavedSearchEditor
 from calibre.gui2.dialogs.search import SearchDialog
 
+class AsYouType(unicode):
+
+    def __new__(cls, text):
+        self = unicode.__new__(cls, text)
+        self.as_you_type = True
+        return self
+
 class SearchLineEdit(QLineEdit):  # {{{
     key_pressed = pyqtSignal(object)
     select_on_mouse_press = None
@@ -189,17 +196,19 @@ class SearchBox2(QComboBox):  # {{{
         self.normalize_state()
 
     def timer_event(self):
-        self.do_search()
+        self._do_search(as_you_type=True)
 
     def history_selected(self, text):
         self.changed.emit()
         self.do_search()
 
-    def _do_search(self, store_in_history=True):
+    def _do_search(self, store_in_history=True, as_you_type=False):
         self.hide_completer_popup()
         text = unicode(self.currentText()).strip()
         if not text:
             return self.clear()
+        if as_you_type:
+            text = AsYouType(text)
         self.search.emit(text)
 
         if store_in_history: