Add a button next to the search bar to toggle easily between highlight and restrict search modes

src/calibre/gui2/layout.py

@@ -196,6 +196,10 @@ class SearchBar(QWidget): # {{{
         l.addWidget(x)
         x.setToolTip(_("Reset Quick Search"))
 
+        x = parent.highlight_only_button = QToolButton(self)
+        x.setIcon(QIcon(I('arrow-down.png')))
+        l.addWidget(x)
+
         x = parent.search_options_button = QToolButton(self)
         x.setIcon(QIcon(I('config.png')))
         x.setObjectName("search_option_button")

src/calibre/gui2/preferences/search.py

@@ -171,10 +171,10 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         return ConfigWidgetBase.commit(self)
 
     def refresh_gui(self, gui):
+        gui.set_highlight_only_button_icon()
         if self.muc_changed:
             gui.tags_view.set_new_model()
         gui.search.search_as_you_type(config['search_as_you_type'])
-        gui.library_view.model().set_highlight_only(config['highlight_search_matches'])
         gui.search.do_search()
 
     def clear_histories(self, *args):

src/calibre/gui2/search_box.py

@@ -10,7 +10,7 @@ import re
 
 from PyQt4.Qt import QComboBox, Qt, QLineEdit, QStringList, pyqtSlot, QDialog, \
                      pyqtSignal, QCompleter, QAction, QKeySequence, QTimer, \
-                     QString
+                     QString, QIcon
 
 from calibre.gui2 import config
 from calibre.gui2.dialogs.confirm_delete import confirm
@@ -383,6 +383,22 @@ class SearchBoxMixin(object): # {{{
         self.advanced_search_button.setStatusTip(self.advanced_search_button.toolTip())
         self.clear_button.setStatusTip(self.clear_button.toolTip())
         self.search_options_button.clicked.connect(self.search_options_button_clicked)
+        self.set_highlight_only_button_icon()
+        self.highlight_only_button.clicked.connect(self.highlight_only_clicked)
+        tt = _('Enable or disable search highlighting.') + '<br><br>'
+        tt += config.help('highlight_search_matches')
+        self.highlight_only_button.setToolTip(tt)
+
+    def highlight_only_clicked(self, state):
+        config['highlight_search_matches'] = not config['highlight_search_matches']
+        self.set_highlight_only_button_icon()
+
+    def set_highlight_only_button_icon(self):
+        if config['highlight_search_matches']:
+            self.highlight_only_button.setIcon(QIcon(I('highlight_only_on.png')))
+        else:
+            self.highlight_only_button.setIcon(QIcon(I('highlight_only_off.png')))
+        self.library_view.model().set_highlight_only(config['highlight_search_matches'])
 
     def focus_search_box(self, *args):
         self.search.setFocus(Qt.OtherFocusReason)