1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the examples of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

    32 **

    33 **

    34 **

    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 #include <QtWebKit>

    44 #include "mainwindow.h"

    45 

    46 //! [0]

    47 MainWindow::MainWindow()

    48 {

    49     createActions();

    50     createMenus();

    51     centralWidget = new Previewer(this);

    52     setCentralWidget(centralWidget);

    53 

    54     connect(centralWidget->webView, SIGNAL(loadFinished(bool)),

    55         this, SLOT(updateTextEdit()));

    56     setStartupText();

    57 }

    58 //! [0]

    59 

    60 //! [1]

    61 void MainWindow::createActions()

    62 {

    63     openAct = new QAction(tr("&Open..."), this);

    64     openAct->setShortcuts(QKeySequence::Open);

    65     openAct->setStatusTip(tr("Open an existing HTML file"));

    66     connect(openAct, SIGNAL(triggered()), this, SLOT(open()));

    67 

    68     openUrlAct = new QAction(tr("&Open URL..."), this);

    69     openUrlAct->setShortcut(tr("Ctrl+U"));

    70     openUrlAct->setStatusTip(tr("Open a URL"));

    71     connect(openUrlAct, SIGNAL(triggered()), this, SLOT(openUrl()));

    72 //! [1]

    73 

    74     saveAct = new QAction(tr("&Save"), this);

    75     saveAct->setShortcuts(QKeySequence::Save);

    76     saveAct->setStatusTip(tr("Save the HTML file to disk"));

    77     connect(saveAct, SIGNAL(triggered()), this, SLOT(save()));

    78 

    79     exitAct = new QAction(tr("E&xit"), this);

    80     exitAct->setStatusTip(tr("Exit the application"));

    81     exitAct->setShortcuts(QKeySequence::Quit);

    82     connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));

    83 

    84     aboutAct = new QAction(tr("&About"), this);

    85     aboutAct->setStatusTip(tr("Show the application's About box"));

    86     connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));

    87 

    88     aboutQtAct = new QAction(tr("About &Qt"), this);

    89     aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));

    90     connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));

    91 }

    92 

    93 //! [2]

    94 void MainWindow::createMenus()

    95 {

    96     fileMenu = menuBar()->addMenu(tr("&File"));

    97     fileMenu->addAction(openAct);

    98     fileMenu->addAction(openUrlAct);

    99     fileMenu->addAction(saveAct);

   100     fileMenu->addSeparator();

   101     fileMenu->addAction(exitAct);

   102 

   103     menuBar()->addSeparator();

   104 

   105     helpMenu = menuBar()->addMenu(tr("&Help"));

   106     helpMenu->addAction(aboutAct);

   107     helpMenu->addAction(aboutQtAct);

   108 }

   109 //! [2]

   110 

   111 //! [3]

   112 void MainWindow::about()

   113 {

   114     QMessageBox::about(this, tr("About Previewer"),

   115         tr("The <b>Previewer</b> example demonstrates how to "

   116            "view HTML documents using a QWebView."));

   117 }

   118 //! [3]

   119 

   120 //! [4]

   121 void MainWindow::open()

   122 {

   123     QString fileName = QFileDialog::getOpenFileName(this);

   124     if (!fileName.isEmpty()) {

   125         // read from file

   126         QFile file(fileName);

   127 

   128         if (!file.open(QIODevice::ReadOnly)) {

   129             QMessageBox::information(this, tr("Unable to open file"),

   130                 file.errorString());

   131             return;

   132         }

   133 

   134         QTextStream out(&file);

   135         QString output = out.readAll();

   136 

   137         // display contents

   138         centralWidget->plainTextEdit->setPlainText(output);

   139         centralWidget->setBaseUrl(QUrl::fromLocalFile(fileName));

   140     }

   141 }

   142 //! [4]

   143 

   144 //! [5]

   145 void MainWindow::openUrl()

   146 {

   147     bool ok;

   148     QString url = QInputDialog::getText(this, tr("Enter a URL"),

   149                   tr("URL:"), QLineEdit::Normal, "http://", &ok);

   150 

   151     if (ok && !url.isEmpty()) {

   152         centralWidget->webView->setUrl(url);

   153     }

   154 }

   155 //! [5]

   156 

   157 //! [6]

   158 void MainWindow::save()

   159 {

   160     QString content = centralWidget->plainTextEdit->toPlainText();

   161     QString fileName = QFileDialog::getSaveFileName(this);

   162 

   163     if (!fileName.isEmpty()) {

   164         // save to file

   165         QFile file(fileName);

   166 

   167         if (!file.open(QIODevice::WriteOnly)) {

   168             QMessageBox::information(this, tr("Unable to open file"),

   169                 file.errorString());

   170             return;

   171         }

   172 

   173         QTextStream in(&file);

   174         in << content;

   175     }

   176 }

   177 //! [6]

   178 

   179 //! [7]

   180 void MainWindow::updateTextEdit()

   181 {

   182     QWebFrame *mainFrame = centralWidget->webView->page()->mainFrame();

   183     QString frameText = mainFrame->toHtml();

   184     centralWidget->plainTextEdit->setPlainText(frameText);

   185 }

   186 //! [7]

   187 

   188 //! [8]

   189 void MainWindow::setStartupText()

   190 {

   191     QString string = "<html><body><h1>HTML Previewer</h1>"

   192                      " <p>This example shows you how to use QWebView to"

   193                      " preview HTML data written in a QPlainTextEdit.</p>"

   194                      " </body></html>";

   195     centralWidget->webView->setHtml(string);

   196 }

   197 //! [8]