Qt 5.7 | Qt WebEngine | WebEngine Demo Browser Example | toolbarsearch.cpp Example File

Qt 5.7.1 Reference Documentation

# toolbarsearch.cpp Example File

webenginewidgets/demobrowser/toolbarsearch.cpp

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      #include "toolbarsearch.h"
      #include "autosaver.h"
      #include "browserapplication.h"

      #include <QtCore/QSettings>
      #include <QtCore/QUrl>
      #include <QtCore/QUrlQuery>

      #include <QtWidgets/QCompleter>
      #include <QtWidgets/QMenu>
      #include <QtCore/QStringListModel>

      #include <QWebEngineSettings>

      /*
          ToolbarSearch is a very basic search widget that also contains a small history.
          Searches are turned into urls that use Google to perform search
       */
      ToolbarSearch::ToolbarSearch(QWidget *parent)
          : SearchLineEdit(parent)
          , m_autosaver(new AutoSaver(this))
          , m_maxSavedSearches(10)
          , m_stringListModel(new QStringListModel(this))
      {
          QMenu *m = menu();
          connect(m, SIGNAL(aboutToShow()), this, SLOT(aboutToShowMenu()));
          connect(m, SIGNAL(triggered(QAction*)), this, SLOT(triggeredMenuAction(QAction*)));

          QCompleter *completer = new QCompleter(m_stringListModel, this);
          completer->setCompletionMode(QCompleter::InlineCompletion);
          lineEdit()->setCompleter(completer);

          connect(lineEdit(), SIGNAL(returnPressed()), SLOT(searchNow()));
          setInactiveText(tr("Google"));
          load();
      }

      ToolbarSearch::~ToolbarSearch()
      {
          m_autosaver->saveIfNeccessary();
      }

      void ToolbarSearch::save()
      {
          QSettings settings;
          settings.beginGroup(QLatin1String("toolbarsearch"));
          settings.setValue(QLatin1String("recentSearches"), m_stringListModel->stringList());
          settings.setValue(QLatin1String("maximumSaved"), m_maxSavedSearches);
          settings.endGroup();
      }

      void ToolbarSearch::load()
      {
          QSettings settings;
          settings.beginGroup(QLatin1String("toolbarsearch"));
          QStringList list = settings.value(QLatin1String("recentSearches")).toStringList();
          m_maxSavedSearches = settings.value(QLatin1String("maximumSaved"), m_maxSavedSearches).toInt();
          m_stringListModel->setStringList(list);
          settings.endGroup();
      }

      void ToolbarSearch::searchNow()
      {
          QString searchText = lineEdit()->text();
          QStringList newList = m_stringListModel->stringList();
          if (newList.contains(searchText))
              newList.removeAt(newList.indexOf(searchText));
          newList.prepend(searchText);
          if (newList.size() >= m_maxSavedSearches)
              newList.removeLast();

          if (!BrowserApplication::instance()->privateBrowsing()) {
              m_stringListModel->setStringList(newList);
              m_autosaver->changeOccurred();
          }

          QUrl url(QLatin1String("http://www.google.com/search"));
          QUrlQuery urlQuery;
          urlQuery.addQueryItem(QLatin1String("q"), searchText);
          urlQuery.addQueryItem(QLatin1String("ie"), QLatin1String("UTF-8"));
          urlQuery.addQueryItem(QLatin1String("oe"), QLatin1String("UTF-8"));
          urlQuery.addQueryItem(QLatin1String("client"), QLatin1String("qtdemobrowser"));
          url.setQuery(urlQuery);
          emit search(url);
      }

      void ToolbarSearch::aboutToShowMenu()
      {
          lineEdit()->selectAll();
          QMenu *m = menu();
          m->clear();
          QStringList list = m_stringListModel->stringList();
          if (list.isEmpty()) {
              m->addAction(tr("No Recent Searches"));
              return;
          }

          QAction *recent = m->addAction(tr("Recent Searches"));
          recent->setEnabled(false);
          for (int i = 0; i < list.count(); ++i) {
              QString text = list.at(i);
              m->addAction(text)->setData(text);
          }
          m->addSeparator();
          m->addAction(tr("Clear Recent Searches"), this, SLOT(clear()));
      }

      void ToolbarSearch::triggeredMenuAction(QAction *action)
      {
          QVariant v = action->data();
          if (v.canConvert<QString>()) {
              QString text = v.toString();
              lineEdit()->setText(text);
              searchNow();
          }
      }

      void ToolbarSearch::clear()
      {
          m_stringListModel->setStringList(QStringList());
          m_autosaver->changeOccurred();;
      }