toolbarsearch.cpp Example File

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

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

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

  #include <QWebSettings>

  /*
      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();

      QWebSettings *globalSettings = QWebSettings::globalSettings();
      if (!globalSettings->testAttribute(QWebSettings::PrivateBrowsingEnabled)) {
          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();;
  }