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Diffstat (limited to 'examples/webkit/previewer/mainwindow.cpp')
| -rw-r--r-- | examples/webkit/previewer/mainwindow.cpp | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/examples/webkit/previewer/mainwindow.cpp b/examples/webkit/previewer/mainwindow.cpp new file mode 100644 index 0000000..abe7941 --- /dev/null +++ b/examples/webkit/previewer/mainwindow.cpp @@ -0,0 +1,197 @@ +/**************************************************************************** +** +** 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] |