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    41 

    42 #include <QtGui>

    43 

    44 #include "mainwindow.h"

    45 

    46 //! [0]

    47 MainWindow::MainWindow(QWidget *parent)

    48     : QMainWindow(parent)

    49 {

    50     setupFileMenu();

    51     setupHelpMenu();

    52     setupEditor();

    53 

    54     setCentralWidget(editor);

    55     setWindowTitle(tr("Syntax Highlighter"));

    56 }

    57 //! [0]

    58 

    59 void MainWindow::about()

    60 {

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

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

    63                    "to perform simple syntax highlighting by subclassing " \

    64                    "the QSyntaxHighlighter class and describing " \

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

    66 }

    67 

    68 void MainWindow::newFile()

    69 {

    70     editor->clear();

    71 }

    72 

    73 void MainWindow::openFile(const QString &path)

    74 {

    75     QString fileName = path;

    76 

    77     if (fileName.isNull())

    78         fileName = QFileDialog::getOpenFileName(this,

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

    80 

    81     if (!fileName.isEmpty()) {

    82         QFile file(fileName);

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

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

    85     }

    86 }

    87 

    88 //! [1]

    89 void MainWindow::setupEditor()

    90 {

    91     QFont font;

    92     font.setFamily("Courier");

    93     font.setFixedPitch(true);

    94     font.setPointSize(10);

    95 

    96     editor = new QTextEdit;

    97     editor->setFont(font);

    98 

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

   100 

   101     QFile file("mainwindow.h");

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

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

   104 }

   105 //! [1]

   106 

   107 void MainWindow::setupFileMenu()

   108 {

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

   110     menuBar()->addMenu(fileMenu);

   111 

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

   113                         QKeySequence::New);

   114 

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

   116                         QKeySequence::Open);

   117                         

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

   119                         QKeySequence::Quit);

   120 }

   121 

   122 void MainWindow::setupHelpMenu()

   123 {

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

   125     menuBar()->addMenu(helpMenu);

   126 

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

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

   129 }