toolbarsearch.cpp Example File | Qt WebKit Examples 5.4

- Qt 5.4
- Qt WebKit Examples
- Tab Browser
- toolbarsearch.cpp Example File
- Qt 5.4.2 Reference Documentation

# toolbarsearch.cpp Example File

webkitwidgets/browser/toolbarsearch.cpp

    /****************************************************************************
    **
    ** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
    ** Contact: http://www.qt-project.org/legal
    **
    ** This file is part of the demonstration applications of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
    ** Commercial License Usage
    ** Licensees holding valid commercial Qt licenses may use this file in
    ** accordance with the commercial license agreement provided with the
    ** Software or, alternatively, in accordance with the terms contained in
    ** a written agreement between you and Digia. For licensing terms and
    ** conditions see http://qt.digia.com/licensing. For further information
    ** use the contact form at http://qt.digia.com/contact-us.
    **
    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
    ** General Public License version 2.1 or version 3 as published by the Free
    ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
    ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
    ** following information to ensure the GNU Lesser General Public License
    ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
    ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
    **
    ** In addition, as a special exception, Digia gives you certain additional
    ** rights. These rights are described in the Digia Qt LGPL Exception
    ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
    **
    ** $QT_END_LICENSE$
    **
    ****************************************************************************/

    #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();;
    }