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#include <QtGui>

#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent)

    : QMainWindow(parent)

{

    setWindowTitle("Dock Widgets");

    setupDockWindow();

    setupContents();

    setupMenus();

    textBrowser = new QTextBrowser(this);

    connect(headingList, SIGNAL(itemClicked(QListWidgetItem *)),

            this, SLOT(updateText(QListWidgetItem *)));

    updateText(headingList->item(0));

    headingList->setCurrentRow(0);

    setCentralWidget(textBrowser);

}

void MainWindow::setupContents()

{

    QFile titlesFile(":/Resources/titles.txt");

    titlesFile.open(QFile::ReadOnly);

    int chapter = 0;

    do {

        QString line = titlesFile.readLine().trimmed();

        QStringList parts = line.split("\t", QString::SkipEmptyParts);

        if (parts.size() != 2)

            break;

        QString chapterTitle = parts[0];

        QString fileName = parts[1];

        QFile chapterFile(fileName);

        chapterFile.open(QFile::ReadOnly);

        QListWidgetItem *item = new QListWidgetItem(chapterTitle, headingList);

        item->setData(Qt::DisplayRole, chapterTitle);

        item->setData(Qt::UserRole, chapterFile.readAll());

        item->setFlags(Qt::ItemIsEnabled | Qt::ItemIsSelectable);

        chapterFile.close();

        chapter++;

    } while (titlesFile.isOpen());

    titlesFile.close();

}

void MainWindow::setupDockWindow()

{

//! [0]

    contentsWindow = new QDockWidget(tr("Table of Contents"), this);

    contentsWindow->setAllowedAreas(Qt::LeftDockWidgetArea

                                  | Qt::RightDockWidgetArea);

    addDockWidget(Qt::LeftDockWidgetArea, contentsWindow);

    headingList = new QListWidget(contentsWindow);

    contentsWindow->setWidget(headingList);

//! [0]

}

void MainWindow::setupMenus()

{

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

    exitAct->setShortcut(tr("Ctrl+Q"));

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

    connect(exitAct, SIGNAL(triggered()), qApp, SLOT(closeAllWindows()));

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

    fileMenu->addAction(exitAct);

}

void MainWindow::updateText(QListWidgetItem *item)

{

    QString text = item->data(Qt::UserRole).toString();

    textBrowser->setHtml(text);

}