- Qt 5.5
- Qt WebEngine Widgets
- WebEngine Tab Browser Example
- toolbarsearch.cpp Example File
- Qt 5.5.1 Reference Documentation

# toolbarsearch.cpp Example File

browser/toolbarsearch.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
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    ** This file is part of the demonstration applications of the Qt Toolkit.
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    ** General Public License version 2.1 as published by the Free Software
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    ** packaging of this file. Please review the following information to
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    ** General Public License version 3.0 as published by the Free Software
    ** Foundation and appearing in the file LICENSE.GPL included in the
    ** packaging of this file. Please review the following information to
    ** ensure the GNU General Public License version 3.0 requirements will be
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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();;
    }