Long live Qt!

1 files changed, 197 insertions, 0 deletions

diff --git a/examples/webkit/previewer/mainwindow.cpp b/examples/webkit/previewer/mainwindow.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#include <QtWebKit>
+#include "mainwindow.h"
+
+//! [0]
+MainWindow::MainWindow()
+{
+    createActions();
+    createMenus();
+    centralWidget = new Previewer(this);
+    setCentralWidget(centralWidget);
+
+    connect(centralWidget->webView, SIGNAL(loadFinished(bool)),
+        this, SLOT(updateTextEdit()));
+    setStartupText();
+}
+//! [0]
+
+//! [1]
+void MainWindow::createActions()
+{
+    openAct = new QAction(tr("&Open..."), this);
+    openAct->setShortcut(tr("Ctrl+O"));
+    openAct->setStatusTip(tr("Open an existing HTML file"));
+    connect(openAct, SIGNAL(triggered()), this, SLOT(open()));
+
+    openUrlAct = new QAction(tr("&Open URL..."), this);
+    openUrlAct->setShortcut(tr("Ctrl+U"));
+    openUrlAct->setStatusTip(tr("Open a URL"));
+    connect(openUrlAct, SIGNAL(triggered()), this, SLOT(openUrl()));
+//! [1]
+
+    saveAct = new QAction(tr("&Save"), this);
+    saveAct->setShortcut(tr("Ctrl+S"));
+    saveAct->setStatusTip(tr("Save the HTML file to disk"));
+    connect(saveAct, SIGNAL(triggered()), this, SLOT(save()));
+
+    exitAct = new QAction(tr("E&xit"), this);
+    exitAct->setStatusTip(tr("Exit the application"));
+    exitAct->setShortcut(tr("Ctrl+Q"));
+    connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
+
+    aboutAct = new QAction(tr("&About"), this);
+    aboutAct->setStatusTip(tr("Show the application's About box"));
+    connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
+
+    aboutQtAct = new QAction(tr("About &Qt"), this);
+    aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
+    connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
+}
+
+//! [2]
+void MainWindow::createMenus()
+{
+    fileMenu = menuBar()->addMenu(tr("&File"));
+    fileMenu->addAction(openAct);
+    fileMenu->addAction(openUrlAct);
+    fileMenu->addAction(saveAct);
+    fileMenu->addSeparator();
+    fileMenu->addAction(exitAct);
+
+    menuBar()->addSeparator();
+
+    helpMenu = menuBar()->addMenu(tr("&Help"));
+    helpMenu->addAction(aboutAct);
+    helpMenu->addAction(aboutQtAct);
+}
+//! [2]
+
+//! [3]
+void MainWindow::about()
+{
+    QMessageBox::about(this, tr("About Previewer"),
+        tr("The <b>Previewer</b> example demonstrates how to "
+           "view HTML documents using a QWebView."));
+}
+//! [3]
+
+//! [4]
+void MainWindow::open()
+{
+    QString fileName = QFileDialog::getOpenFileName(this);
+    if (!fileName.isEmpty()) {
+        // read from file
+        QFile file(fileName);
+
+        if (!file.open(QIODevice::ReadOnly)) {
+            QMessageBox::information(this, tr("Unable to open file"),
+                file.errorString());
+            return;
+        }
+
+        QTextStream out(&file);
+        QString output = out.readAll();
+
+        // display contents
+        centralWidget->plainTextEdit->setPlainText(output);
+        centralWidget->setBaseUrl(QUrl::fromLocalFile(fileName));
+    }
+}
+//! [4]
+
+//! [5]
+void MainWindow::openUrl()
+{
+    bool ok;
+    QString url = QInputDialog::getText(this, tr("Enter a URL"),
+                  tr("URL:"), QLineEdit::Normal, "http://", &ok);
+
+    if (ok && !url.isEmpty()) {
+        centralWidget->webView->setUrl(url);
+    }
+}
+//! [5]
+
+//! [6]
+void MainWindow::save()
+{
+    QString content = centralWidget->plainTextEdit->toPlainText();
+    QString fileName = QFileDialog::getSaveFileName(this);
+
+    if (!fileName.isEmpty()) {
+        // save to file
+        QFile file(fileName);
+
+        if (!file.open(QIODevice::WriteOnly)) {
+            QMessageBox::information(this, tr("Unable to open file"),
+                file.errorString());
+            return;
+        }
+
+        QTextStream in(&file);
+        in << content;
+    }
+}
+//! [6]
+
+//! [7]
+void MainWindow::updateTextEdit()
+{
+    QWebFrame *mainFrame = centralWidget->webView->page()->mainFrame();
+    QString frameText = mainFrame->toHtml();
+    centralWidget->plainTextEdit->setPlainText(frameText);
+}
+//! [7]
+
+//! [8]
+void MainWindow::setStartupText()
+{
+    QString string = "<html><body><h1>HTML Previewer</h1>"
+                     " <p>This example shows you how to use QWebView to"
+                     " preview HTML data written in a QPlainTextEdit.</p>"
+                     " </body></html>";
+    centralWidget->webView->setHtml(string);
+}
+//! [8]