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#include <QtGui>

#include "mainwindow.h"

//! [0]

MainWindow::MainWindow(QWidget *parent)

    : QMainWindow(parent)

{

    setupFileMenu();

    setupHelpMenu();

    setupEditor();

    setCentralWidget(editor);

    setWindowTitle(tr("Syntax Highlighter"));

}

//! [0]

void MainWindow::about()

{

    QMessageBox::about(this, tr("About Syntax Highlighter"),

                tr("<p>The <b>Syntax Highlighter</b> example shows how " \

                   "to perform simple syntax highlighting by subclassing " \

                   "the QSyntaxHighlighter class and describing " \

                   "highlighting rules using regular expressions.</p>"));

}

void MainWindow::newFile()

{

    editor->clear();

}

void MainWindow::openFile(const QString &path)

{

    QString fileName = path;

    if (fileName.isNull())

        fileName = QFileDialog::getOpenFileName(this,

            tr("Open File"), "", "C++ Files (*.cpp *.h)");

    if (!fileName.isEmpty()) {

        QFile file(fileName);

        if (file.open(QFile::ReadOnly | QFile::Text))

            editor->setPlainText(file.readAll());

    }

}

//! [1]

void MainWindow::setupEditor()

{

    QFont font;

    font.setFamily("Courier");

    font.setFixedPitch(true);

    font.setPointSize(10);

    editor = new QTextEdit;

    editor->setFont(font);

    highlighter = new Highlighter(editor->document());

    QFile file("mainwindow.h");

    if (file.open(QFile::ReadOnly | QFile::Text))

        editor->setPlainText(file.readAll());

}

//! [1]

void MainWindow::setupFileMenu()

{

    QMenu *fileMenu = new QMenu(tr("&File"), this);

    menuBar()->addMenu(fileMenu);

    fileMenu->addAction(tr("&New"), this, SLOT(newFile()),

                        QKeySequence::New);

    fileMenu->addAction(tr("&Open..."), this, SLOT(openFile()),

                        QKeySequence::Open);

    fileMenu->addAction(tr("E&xit"), qApp, SLOT(quit()),

                        QKeySequence::Quit);

}

void MainWindow::setupHelpMenu()

{

    QMenu *helpMenu = new QMenu(tr("&Help"), this);

    menuBar()->addMenu(helpMenu);

    helpMenu->addAction(tr("&About"), this, SLOT(about()));

    helpMenu->addAction(tr("About &Qt"), qApp, SLOT(aboutQt()));

}