Add option to disable instant search on ech searchengine change.

src/lib/navigation/websearchbar.cpp

@@ -185,11 +185,21 @@ void WebSearchBar::searchChanged(const ButtonWithMenu::Item &item)
 
     m_searchManager->setActiveEngine(m_activeEngine);
 
-    if (!m_reloadingEngines && !text().isEmpty()) {
+    if (qzSettings->searchOnEngineChange && !m_reloadingEngines && !text().isEmpty()) {
         search();
     }
 }
 
+void WebSearchBar::instantSearchChanged(bool enable)
+{
+    
+    Settings settings;
+    settings.beginGroup("SearchEngines");
+    settings.setValue("SearchOnEngineChange", enable);
+    settings.endGroup();
+    qzSettings->searchOnEngineChange = enable;
+}
+
 void WebSearchBar::search()
 {
     p_QupZilla->weView()->setFocus();
@@ -302,6 +312,12 @@ void WebSearchBar::contextMenuEvent(QContextMenuEvent* event)
     act->setChecked(qzSettings->showSearchSuggestions);
     connect(act, SIGNAL(triggered(bool)), this, SLOT(enableSearchSuggestions(bool)));
 
+    QAction *instantSearch = m_menu->addAction(tr("Search when engine changed"));
+    instantSearch->setToolTip(tr("If checked an instant search is triggered when the search engine is changed"));
+    instantSearch->setCheckable(true);
+    instantSearch->setChecked(qzSettings->searchOnEngineChange);
+    connect(instantSearch, SIGNAL(triggered(bool)), this, SLOT(instantSearchChanged(bool)));
+
     m_pasteAndGoAction->setEnabled(!QApplication::clipboard()->text().isEmpty());
 
     //Prevent choosing first option with double rightclick

src/lib/navigation/websearchbar.h

@@ -69,6 +69,7 @@ private slots:
 
     void addEngineFromAction();
     void pasteAndGo();
+    void instantSearchChanged(bool);
 
 private:
     void focusInEvent(QFocusEvent* e);

src/lib/other/qzsettings.cpp

@@ -36,6 +36,7 @@ void QzSettings::loadSettings()
 
     settings.beginGroup("SearchEngines");
     showSearchSuggestions = settings.value("showSuggestions", true).toBool();
+    searchOnEngineChange = settings.value("SearchOnEngineChange", true).toBool();
     settings.endGroup();
 
     settings.beginGroup("Web-Browser-Settings");

src/lib/other/qzsettings.h

@@ -40,6 +40,7 @@ public:
 
     // SearchEngines
     bool showSearchSuggestions;
+    bool searchOnEngineChange;
 
     // Web-Browser-Settings
     int defaultZoom;