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#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->setShortcuts(QKeySequence::Open);

    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->setShortcuts(QKeySequence::Save);

    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->setShortcuts(QKeySequence::Quit);

    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]