Qt Reference Documentation

- Qt 4.8
- ALL VERSIONS

- A
- A
- A
- Print

# BrowserView.cpp Example File

demos/embedded/anomaly/src/BrowserView.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the demos of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** 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 The Qt Company. For licensing terms
     ** and conditions see http://www.qt.io/terms-conditions. For further
     ** information use the contact form at http://www.qt.io/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.
     **
     ** As a special exception, The Qt Company gives you certain additional
     ** rights. These rights are described in The Qt Company LGPL Exception
     ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
     **
     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** 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
     ** met: http://www.gnu.org/copyleft/gpl.html.
     **
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #include "BrowserView.h"

     #include <QtGui>
     #include <QtNetwork>
     #include <QtWebKit>

     #include "ControlStrip.h"
     #include "TitleBar.h"
     #include "flickcharm.h"
     #include "webview.h"
     #include "ZoomStrip.h"

     BrowserView::BrowserView(QWidget *parent)
         : QWidget(parent)
         , m_titleBar(0)
         , m_webView(0)
         , m_progress(0)
         , m_currentZoom(100)
     {
         m_titleBar = new TitleBar(this);
         m_webView = new WebView(this);
         m_zoomStrip = new ZoomStrip(this);
         m_controlStrip = new ControlStrip(this);

         m_zoomLevels << 30 << 50 << 67 << 80 << 90;
         m_zoomLevels << 100;
         m_zoomLevels << 110 << 120 << 133 << 150 << 170 << 200 << 240 << 300;

         QNetworkConfigurationManager manager;
         if (manager.capabilities() & QNetworkConfigurationManager::NetworkSessionRequired) {
             // Get saved network configuration
             QSettings settings(QSettings::UserScope, QLatin1String("Trolltech"));
             settings.beginGroup(QLatin1String("QtNetwork"));
             const QString id =
                 settings.value(QLatin1String("DefaultNetworkConfiguration")).toString();
             settings.endGroup();

             // If the saved network configuration is not currently discovered use the system
             // default
             QNetworkConfiguration config = manager.configurationFromIdentifier(id);
             if ((config.state() & QNetworkConfiguration::Discovered) !=
                 QNetworkConfiguration::Discovered) {
                 config = manager.defaultConfiguration();
             }

             m_webView->page()->networkAccessManager()->setConfiguration(config);
         }

         QTimer::singleShot(0, this, SLOT(initialize()));
     }

     void BrowserView::initialize()
     {
         connect(m_zoomStrip, SIGNAL(zoomInClicked()), SLOT(zoomIn()));
         connect(m_zoomStrip, SIGNAL(zoomOutClicked()), SLOT(zoomOut()));

         connect(m_controlStrip, SIGNAL(menuClicked()), SIGNAL(menuButtonClicked()));
         connect(m_controlStrip, SIGNAL(backClicked()), m_webView, SLOT(back()));
         connect(m_controlStrip, SIGNAL(forwardClicked()), m_webView, SLOT(forward()));
         connect(m_controlStrip, SIGNAL(closeClicked()), qApp, SLOT(quit()));

         QPalette pal = m_webView->palette();
         pal.setBrush(QPalette::Base, Qt::white);
         m_webView->setPalette(pal);

         FlickCharm *flickCharm = new FlickCharm(this);
         flickCharm->activateOn(m_webView);

         m_webView->setZoomFactor(static_cast<qreal>(m_currentZoom)/100.0);
         connect(m_webView, SIGNAL(loadStarted()), SLOT(start()));
         connect(m_webView, SIGNAL(loadProgress(int)), SLOT(setProgress(int)));
         connect(m_webView, SIGNAL(loadFinished(bool)), SLOT(finish(bool)));
         connect(m_webView, SIGNAL(urlChanged(QUrl)), SLOT(updateTitleBar()));

         m_webView->setHtml("about:blank");
         m_webView->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
         m_webView->setFocus();
     }

     void BrowserView::start()
     {
         m_progress = 0;
         updateTitleBar();
         //m_titleBar->setText(m_webView->url().toString());
     }

     void BrowserView::setProgress(int percent)
     {
         m_progress = percent;
         updateTitleBar();
         //m_titleBar->setText(QString("Loading %1%").arg(percent));
     }

     void BrowserView::updateTitleBar()
     {
         QUrl url = m_webView->url();
         m_titleBar->setHost(url.host());
         m_titleBar->setTitle(m_webView->title());
         m_titleBar->setProgress(m_progress);
     }

     void BrowserView::finish(bool ok)
     {
         m_progress = 0;
         updateTitleBar();

         // TODO: handle error
         if (!ok) {
             //m_titleBar->setText("Loading failed.");
         }
     }

     void BrowserView::zoomIn()
     {
         int i = m_zoomLevels.indexOf(m_currentZoom);
         Q_ASSERT(i >= 0);
         if (i < m_zoomLevels.count() - 1)
             m_currentZoom = m_zoomLevels[i + 1];

         m_webView->setZoomFactor(static_cast<qreal>(m_currentZoom)/100.0);
     }

     void BrowserView::zoomOut()
     {
         int i = m_zoomLevels.indexOf(m_currentZoom);
         Q_ASSERT(i >= 0);
         if (i > 0)
             m_currentZoom = m_zoomLevels[i - 1];

         m_webView->setZoomFactor(static_cast<qreal>(m_currentZoom)/100.0);
     }

     void BrowserView::resizeEvent(QResizeEvent *event)
     {
         QWidget::resizeEvent(event);

         int h1 = m_titleBar->sizeHint().height();
         int h2 = m_controlStrip->sizeHint().height();

         m_titleBar->setGeometry(0, 0, width(), h1);
         m_controlStrip->setGeometry(0, height() - h2, width(), h2);
         m_webView->setGeometry(0, h1, width(), height() - h1);

         int zw = m_zoomStrip->sizeHint().width();
         int zh = m_zoomStrip->sizeHint().height();
         m_zoomStrip->move(width() - zw, (height() - zh) / 2);
     }

     void BrowserView::navigate(const QUrl &url)
     {
         m_webView->load(url);
     }