webview.cpp Example File

 /****************************************************************************
 **
 ** 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 "webview.h"

 #include <QPaintEvent>
 #include <QWebFrame>

 WebView::WebView(QWidget *parent)
     : QWebView(parent)
     , inLoading(false)
 {
     connect(this, SIGNAL(loadStarted()), this, SLOT(newPageLoading()));
     connect(this, SIGNAL(loadFinished(bool)), this, SLOT(pageLoaded(bool)));
     page()->setPreferredContentsSize(QSize(1024, 768));
 }

 void WebView::paintEvent(QPaintEvent *event)
 {
     if (inLoading && loadingTime.elapsed() < 750) {
         QPainter painter(this);
         painter.setBrush(Qt::white);
         painter.setPen(Qt::NoPen);
         foreach (const QRect &rect, event->region().rects()) {
             painter.drawRect(rect);
         }
     } else {
         QWebView::paintEvent(event);
     }
 }

 void WebView::newPageLoading()
 {
     inLoading = true;
     loadingTime.start();
 }

 void WebView::pageLoaded(bool)
 {
     inLoading = false;
     update();
 }