mainwindow.cpp Example File
richtext/syntaxhighlighter/mainwindow.cpp
 
 
 #include <QtGui>
 #include "mainwindow.h"
 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent)
 {
     setupFileMenu();
     setupHelpMenu();
     setupEditor();
     setCentralWidget(editor);
     setWindowTitle(tr("Syntax Highlighter"));
 }
 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());
     }
 }
 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());
 }
 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()));
 }